Tetra Tech Inc

NASDAQ:TTEK

Earnings Call Analysis

Robust Growth and Optimistic Outlook

The company concluded a record year with $3.75 billion in net revenue, a 32% increase from the previous year. Operating income rose to $358 million, with EBITDA hitting $481 million, up 33%. Adjusted EPS was $5.21, a 16% improvement. For FY 2024, they expect a revenue range of $4.05 to $4.25 billion and GAAP EPS of $5.70 to $6.00, targeting an 11% revenue and 15% EPS growth at the midpoint. The future is bright with a strong culture and expectations for further growth with RPS integration enhancing international markets.

Exceptional Financial and Strategic Success in Fiscal Year 2023

During the fourth quarter and the entire fiscal year of 2023, the company has proudly surpassed its ambitious goals and achieved record-setting financial performance across all key metrics. The fourth quarter revenue saw a remarkable 40% increase from the previous year. The positive momentum also reflected in earnings, with EBITDA climbing to $153 million in the quarter, a robust 51% rise compared to the previous period. The backlog, an indicator of the company's health and future revenue, expanded significantly to $4.79 billion, marking a 28% increase from last year. The diverse customer base, spanning U.S. federal, state and local, U.S. commercial, and international clients, all contributed to the growth with double-digit revenue increments.

Segment Performance and Margin Expansion

Both the Government Services Group (GSG) and the Commercial/International Group (CIG) segments experienced exceptional growth, contributing to the overall success. The GSG's net revenue surged by 36% to $457 million with a 15.7% margin, while the CIG grew net revenue by 50% and delivered a 14.7% margin. The adoption of international accounting standards pointed to a fourth-quarter margin at an impressive 21% on an adjusted IFRS basis. Over the past three years, the company's margin expanded by 180 basis points, showcasing continual improvements in efficiency and profitability.

Human Capital: Secret to Success

Human Capital, the workforce of the company, is credited as the cornerstone of success. The low turnover rate of 7% and the priority given to internal promotions underscore a stable and advancing workforce. The employees firmly embrace the use of Delta technologies to enhance their efficiency, and the company's commitment to positive global change is a compelling factor in attracting and retaining top talent. The company has set an aspirational goal to improve the lives of 1 billion people through their projects, reflecting the humanitarian and impactful nature of its culture.

Fiscal Year 2024: Bright Outlook with Strategic Goals

Looking forward to fiscal year 2024, the company aims to capitalize on its expanded client network and resources, particularly in the United Kingdom and Australia, and fully realize the RPS acquisition's revenue synergies. The future growth is backed by the strong demand for the company's differentiated and science-led services in areas such as water, environmental management, and sustainable infrastructure. Guidance for fiscal year 2024 features net revenue ranging from $4.05 billion to $4.25 billion, and GAAP earnings per share between $5.70 and $6.00. These projections suggest an enviable 11% top-line revenue growth and a 15% GAAP earnings per share growth at the midpoint. An effective tax rate of 27% and 54 million average diluted shares outstanding are factored into these projections. These numbers exclude any additional contributions from future acquisitions post-earnings announcement.

Strategic Opportunities in Infrastructure and Renewable Energy

The company anticipates a considerable increase in contract capacity, particularly with the IIJA programs, estimating added revenue of around $50 million that could multiply in the upcoming years. The peak for these projects is expected around late 2025 and early 2026. In the renewable energy sphere, encompassing 5% of the business at about $200 million annually, the company is well-poised to navigate through market challenges and help clients optimize their projects even in the face of economic constraints. The expertise in hydroelectric power and the ability to advise clients on viable economic solutions for wind and solar projects bolster the company's future prospects. Despite recent industry headwinds, Tetra Tech's stance remains optimistic, viewing these disruptions as opportunities for growth and further engagement in the renewable energy transition.

Earnings Call Transcript 2023-Q4

[Operator]

Good morning, and thank you for joining the Tetra Tech earnings call. As a reminder, Tetra Tech is also simulcasting this presentation with slides in the Investors section of its website at tetratech.com. This call is being recorded at the request of Tetra Tech, and this broadcast is the copyrighted property of Tetra Tech. Any rebroadcast of this information in whole or part without the prior written permission of Tetra Tech is prohibited.

With us today from management are Dan Batrack, Chairman and Chief Executive Officer; Steve Burdick, Chief Financial Officer; and Jill Hudkins, President. They will provide a brief overview of the results, and then we'll open up the call for questions.

I would like to direct your attention to the safe harbor statement in today's presentation. Today's discussion contains forward-looking statements about future business and financial expectations. Actual results may differ significantly from those projected in today's forward-looking statements due to various risks and uncertainties, including the risks described in Tetra Tech's periodic reports filed with the SEC. Except as required by law, Tetra Tech undertakes no obligation to update its forward-looking statements.

In addition, since management will be presenting some non-GAAP financial measures as references, the appropriate GAAP financial reconciliations are posted in the Investors section of Tetra Tech's website. [Operator Instructions]

With that, I would like to turn the call over to Dan Batrack. Please go ahead, Mr. Batrack.

[Dan Batrack, executive]

Great. Thank you very much, Melissa, and good morning, and welcome to our fourth quarter and fiscal year 2023 earnings conference call. We had an excellent fourth quarter that completed an already exceptionally strong 2023 fiscal year. Across our operations, we exceeded our already high expectations and delivered on both our financial and our strategic goals for the year. We were again recognized as industry leaders with #1 rankings in water and environment and a newly announced #1 ranking for human capital management, which I'll speak to a bit later in this presentation. This ranking recognizes that Tetra Tech's success is a result of our talented workforce and the technical excellence that has been the hallmark of the corporation.

In fiscal year 2023, we increased our backlog by over $1 billion, including services in climate change, energy transition, water security and environmental management. Today, Together with RPS, we are cross-selling new services. For example, we're now providing innovative water management solutions to 19 United Kingdom water utilities and look forward to significantly expanding these services in this upcoming year. As we enter the new year, we look forward to providing our technically differentiated services, our expanded Delta technologies and our newly launched software solutions to clients worldwide.

I'll begin today with an overview of our fiscal year and fourth quarter. Steve Burdick, our Chief Financial Officer, will provide an overview of our financial performance and our capital allocation. Jill Hudkins, President of Corporation will provide additional insight into some of our organic growth strategies.

But before I review the fourth quarter results and the segment's performance, I'd like to provide an overview of the fourth quarter and what we did for the year. Simply stated, we came into this year with an ambitious goal and the highest ever guidance that we'd ever strive for. And I'm pleased to share with you that we not only beat these lofty goals that we set for each of the fourth quarters, but we finished the year with the best quarter of all of them. As a result, we achieved all-time records for every key financial metric that we track.

Now for the fourth quarter, our revenue was up 40% from the prior year. Our EBITDA earnings increased to $153 million in the quarter, which is up 51% from last year and a clear indication of both the strong performance from Tetra Tech and these contribution from the RPS operations that just joined us in late January of just this year. Our backlog increased to $4.79 billion, up 28% from last year and up 9% and just from last quarter.

I'd now like to provide an overview of our performance by our end customer. In the fourth quarter, revenue for all 4 of our client sectors increased by double digits compared to last year. Work for our U.S. federal clients was 29% of our net revenue in the quarter and was up 46% from the same quarter last year. Federal growth was driven by a combination of environmental work, climate, IT and international development related consulting services. We continue to deliver double-digit growth with our state and local revenues being up organically 15% from the fourth quarter of last year, driven by our water management and resiliency consulting services. Our U.S. commercial net revenue was up 13% from last year. Growth in this customer segment sector includes environmental management and is increasingly driven by our high-end consulting and energy transition services and decarbonization services delivered by our high-performance buildings experts. And finally, our international revenue was up 78%. Of course, this is inclusive of our RPS operations. We are now increasingly leveraging our combined resources and expanded client network to win new programs across the United Kingdom, Australia and Canada.

I'd now like to present our performance by segment. In the fourth quarter, the Government Services Group or the GSG segment was up 36% compared to last year at $457 million in the quarter. GSG generated a strong 15.7% margin, an increase of 60 basis points from last year. GSG's strong net revenue growth across key federal programs in civilian, defense and international development agencies drove high utilization and exceptional project performance in the quarter. The Commercial International Group or CIG segment grew net revenue by 50% year-on-year and delivered a 14.7% margin, up 110 basis points from last year. Our CIG segment also had exceptional performance in the quarter with revenue increases driving strong utilization and additional efficiencies, especially in international infrastructure, high-performance buildings and energy-related services.

For the first time, we presented this slide, if you're following along on the webcast, and I'd now like to discuss Tetra Tech's margin performance and the differences in reporting methodologies. And I'm often asked when talking to both analysts and shareholders and other stakeholders about the differences and methodologies used in the industry, especially as those compared to the United States, compared to the United Kingdom and Canada. If you're following along on the slides, the graph shows a comparison between our typical adjusted U.S. GAAP approach, which Tetra Tech has traditionally, in fact, historically always used and the international standard which is also referred to as IFRS.

As you can see on this graph, Tetra Tech's margin was 21% for the fourth quarter on an adjusted IFRS basis. On an annual basis, you can see our trend here at Tetra Tech over the past 3 years with a margin expansion of 180 basis points since 2021. For comparison purposes, the adjusted IFRS measure is about 6 percentage points higher than the adjusted U.S. GAAP calculation that we report. And we think this is quite valuable for our shareholders, analysts and stakeholders to actually understand this difference and make it more comparable when looking at this compared to others that report their financials.

I'd now like to discuss our backlog, the best forward-looking indicator in our business. Our backlog was up 28% from last year, resulting in a new all-time high as I've mentioned a few moments ago, of $4.79 billion of funded and authorized work. This is not potential contract capacity or overall contracts awarded. This is funded and authorized work. Orders were particularly strong in the fourth quarter for us, which were up 45% year-over-year, driven by both commercial and government orders from our clients.

In the quarter, we added more than $1.5 billion in additional contract capacity with our U.S. Federal government clients. And notably, a lot of this was for IIJA related contracts that are directly aligned with our specific strengths in areas like numerical modeling of sediment transport for inland waterways and associated high-end design services, and Jill Hudkins will give an example of this in just a few moments.

This quarter, we were awarded a $33 million program for an inland waterway lock and dam system that leverages our specialized expertise and innovative solutions for optimizing waterway control structures. We also won new programs for key U.S. federal agencies, including the Department of Energy, U.S. EPA, USAID, the U.S. Army Corps of Engineers and others that advanced priority water initiative programs environmental and climate change mitigation and adaptation programs.

At this point, I'd like to turn the presentation over to Steve Burdick, our Chief Financial Officer, who will go over some of the details of our financials in the fourth quarter and for the year, and also talk about our capital allocation. So Steve?

[Steven Burdick, executive]

Thank you, Dan. So as Dan has just reviewed the fourth quarter operating results, I would like to now review the annual GAAP financial results for the fiscal year ending 2023.

Overall, we had record revenue, operating income, earnings and cash flow, and the strong performance from our operations was marked by record fiscal year revenue of $4.52 billion, which was up 29% over last year and record net revenue amounting to $3.75 billion, which was up 32% over last year. And as you heard, we executed strong revenue growth from all our markets, including federal government, state and local, commercial and international, which in particular, benefited from the RPS acquisition as our footprint in the U.K., Europe and Australia has been greatly enhanced.

Now our operating income and earnings per share for the fiscal year were also both all-time highs. Our reported operating income came in at $358 million. This improvement resulted from both segments. And as Dan discussed earlier, the CIG margins have been closing in on the GSG margins. On a consolidated basis, these improvements resulted in our EBITDA increasing to $481 million, which is a 33% increase over fiscal 2022. Our EBITDA margins for Tetra Tech have been increasing at a higher rate compared to our revenue increases, such that our margins have increased an average of 50 basis points per year over the last 4 years. Now GAAP EPS came in at $5.10 and adjusted EPS was $5.21, which was up 16% over last year. The adjusted EPS excluded the final RPS integration costs and lease impairment charges, the onetime FX hedge gain and the associated tax-related items. Now regarding our total FX hedge gain of $110 million. This provided a positive outcome relative to lowering the purchase price for RPS by almost 15% and reducing our debt load required to complete the acquisition. For further details in Q4 and fiscal '23, I'd like to refer you to the reconciliation slides in the back of this presentation as well as our Regulation G attachments included in our earnings release.

Now on a going-forward basis and because we've successfully integrated RPS into Tetra Tech and completed the acquisition accounting, we will provide the fiscal '24 reported results on a combined basis, including intangible amortization. Cash flows generated from operations for fiscal 2023 totaled $368 million or more than 135% of net income. This higher percentage continues our historical long-term trend and goal to generate more cash flow from operations compared to our net income. Our focus on working capital and cash flows has also resulted in further improving our DSO to an all-time best of 54 days. This is an improvement of 7 days from last year. And over the last 5 years, we've improved the DSO each year and brought our DSO down from over 85 days to an industry-leading DSO of 54 days. This lower DSO trend continues to reflect excellence in project delivery and highly satisfied clients in our broad portfolio across all of our end markets and geographies.

Now our net debt leverage was 1.4x, which was much lower than immediately after the close of the RPS acquisition when our leverage was 2.2x at the beginning of this calendar year. Throughout 2023, we've exceeded our initial projections and on reducing our leverage to below the midpoint of our net debt target range of 1x to 2x. And as we increase our EBITDA and generate positive cash flows, we expect to further delever the balance sheet throughout fiscal 2024.

Our long-term capital allocation strategy to continue providing strong returns for our shareholders, calls for smart investing and the growth of our business as well as managing a robust balance sheet. And we successfully accomplished key milestones with the RPS acquisition, while deleveraging our net debt to an amount within our target range throughout this last year. And I expect that the accomplishments in 2023 will have sustainable benefits to our fiscal 2024 and beyond over the long term. The $575 million 5-year convertible debt transaction we completed will result in a more diversified and balanced capital structure. The proceeds we used or were used to pay down a significant amount of our floating rate debt, thus restoring the availability of our entire bank credit facility. The fixed rate coupon of 2.25% compares to a floating -- a current floating rate, which is about 3x that fixed rate thus providing for an attractive arbitrage in annual cash savings to the tune of over $20 million in interest. With a cap call in place, we have mitigated the potential share dilution until our stock price reaches $260 per share. And furthermore, the stock price needs to essentially more than double and grow to over $318 per share to be 1% dilutive to the total shares outstanding.

Our bank credit facility had $800 million in liquidity available at the year-end, and will provide us the ability to invest in organic growth and complete acquisitions in key strategic markets that Jill will speak to next. Our bank credit facility includes sustainability-linked metrics relating to reducing greenhouse gases and improving the lives of 1 billion people. And in our first year, we exceeded all metrics as measured and defined by our credit agreement, thus resulting in the lower cost of debt.

Regarding our dividend program, we increased the dividends paid to shareholders by double digits in the last fiscal year. And I'm glad to announce that our Board of Directors have also just approved a quarterly dividend of $0.26 per share to be paid in December. This is a 13% increase over last year and represents our 34th consecutive quarterly dividend of double-digit year-over-year increases in the amounts paid.

I'm really pleased to share these financial results for our fiscal 2023. I'd like to thank everybody for your support, and I will now hand the call over to Jill to discuss a few of the strategic business opportunities for and beyond.

[Jill Hudkins, executive]

Our environment and sustainable infrastructure are extremely well aligned with U.S. government priority programs for fiscal year 2024 and beyond. The Infrastructure Investment and Jobs Act, or the IIJA, will provide our government clients with a $550 billion funding plus up to deliver priority infrastructure programs in the U.S. This increased climate resilient infrastructure spend is directly aligned with the work we do in water and the environment. Our U.S. state and local clients continue to prioritize digital water solutions to modernize and secure their water facilities as the #1 water firm in the U.S. Tetra Tech is leveraging domain expertise and digital innovation to deliver state-of-the-art automation, advanced analytics artificial intelligence and proprietary software solutions to our 500-plus municipal clients nationwide.

Tetra Tech's recent key wins demonstrate why Tetra Tech has been ranked #1 in water by ENGINEERING NEWS RECORD for 20 years in a row. Tetra Tech's market leadership in high-end water supply and treatment secured a key win to modernize Gloucester Wastewater treatment facility and to improve water quality in the Massachusetts bay. In Southern California Tetra Tech was awarded a major drought resilient water delivery program that will serve 7 million Metropolitan Water District customers. Tetra Tech will leverage its successful track record delivering industry-leading navigation and water control structures for the U.S. Army Corps of Engineers to win new contract capacity and new task orders. Tetra Tech recently announced major contract wins with multiple districts to support inland navigation, flood risk management and aquatic system, biodiversity.

Tetra Tech is providing digital water transformation services for some of the largest cities in the U.S., including Los Angeles, Houston and San Diego. Our innovative digital water solution increase remote operability and reduce operating expenses for our water clients. Our digital water services support double-digit growth and margin expansion for our state and local business.

Tetra Tech's industry leading Climate Change, services continue to be in high demand as our clients continue to prioritize funding for resilient and sustainable infrastructure programs in fiscal year 2024 and beyond. In the United Kingdom, regulated water utilities won best GBP 96 billion in water and wastewater infrastructure from 2025 to 2030, doubling the investment from the prior 5-year regulatory period. Tetra Tech is winning new work in the United Kingdom by further enhancing our proven local experience with additional global perspectives and technology innovation. Global sustainability priorities will require a $1.5 trillion investment to meet net zero greenhouse gas emission targets by 2030. Tetra Tech is winning work worldwide in the areas of energy transition, decarbonization and nature-based solutions.

Next, I'd like to highlight recent key wins that demonstrate our industry leadership in 3 key areas: Energy transition, high-performance buildings and watershed management. Tetra Tech recently announced the award of a $22 million marine environmental survey to support development of a first-of-its-kind floating offshore wind project in Victoria, Australia. In Canada, Tetra Tech recently won the design of a first-of-its-kind biofuel production facility in Quebec that will convert recycled carbon and hydrogen contained in residual forest biomass into alternative fuels. Tetra Tech designed sustainable and healthy buildings using proprietary energy and greenhouse gas modeling software. Tetra Tech recently won a $45 million multi-award energy resilience contract with the U.S. Army Corps of Engineers, to improve energy resilience and security.

Our government portfolio also includes a 1,200 building decarbonization plan to support a carbon-neutral future across the city of Los Angeles. As well as a system-wide decarbonization framework for all 23 California State University campuses.

Finally, Tetra Tech recently won a GBP 20 million modeling and analytics contract with United Utilities and a GBP 7 million (AMP 8) [ AMP 7 & 8 ] network modeling framework with Severn and Trent. Tetra Tech brings industry-leading sewer overflow reduction expertise from the U.S. and Canada and proprietary modeling and analytics software to provide best-in-class sewer overflow reduction services to support the priorities of the U.K. AMP 8 cycle.

And now I'd like to turn the presentation back to Dan to discuss our fiscal '24 outlook.

[Dan Batrack, executive]

Great. Thank you very much, Jill. I'd now like to not preside -- I'd like to present our outlook for fiscal year 2024 across all of our 4 end-client sectors.

First, our U.S. Federal revenues should grow at about 10% from what they were in 2023, supported by our strong backlog and our ability to leverage our existing $25 billion contract capacity that we have with the U.S. federal government. For state and local, we expect to grow at a double-digit pace between a 10% and 15% rate. Client funding priorities are well aligned with our expertise in digital water transformation, high-end water security and climate resiliency.

U.S. commercial is expected to be about 20% of our overall net revenue business and grow at about a 5% to 10% rate. We see growth continuing in the high-performance buildings and clean energy transformation markets that will probably be the fastest-growing areas for us in the commercial sector.

And the fourth area, international, our international work is now about 40% of our business, evenly split between government and commercial. We expect international to grow at about a 10% to 15% rate as we continue to expand our water, environment and sustainable infrastructure work in the United Kingdom, Australia and throughout Canada. In fiscal year 2024, we expect to leverage our expanded client base and resources, especially in the United Kingdom and Australia, and further realize the revenue synergies of the RPS acquisition.

Before I move to the guidance for fiscal year 2024, I'd like to take just a moment to discuss how we here at Tetra Tech think about human capital. As a consulting company, Human capital is the workforce that provides us the insight, the analysis and solutions that drive our business every single day. There are 3 aspects to what makes Tetra Tech unique in the industry and what you might describe as our secret to success with our staff and our human capital.

First, we have just an extraordinary staff across all experience levels within the company. From long-standing experts to the very top entry-level university of recruits. We attract individuals who don't just want a job. They want a career. They want a location that they come and work at. They can get promoted and that they can actually finish their career in a spot better than any other location in the industry. And this has really resulted in our low turnover rates of about 7% per year and the prioritization of internal advancement opportunities for our staff. There is no doubt the first people that we look to, to take new positions within the corporation are those that actually work here and have already demonstrated and contributed to the company.

The second area. Our workforce leverages our Delta technologies that create new solutions and even design software for our clients, not to substitute what we do for our clients with services and professional consulting, but to add to them and allow our clients to achieve even better outcomes than they can just with our consultants alone. Our workforce here at Tetra Tech for every one of the employees, technology is an enabler. Something to make them better. It's not a risk or something they have to be afraid of. And I will tell you, all 27,000 people here embrace the use of technology to make them better, more efficient and have better outcomes from our clients than ever before.

And third, we believe in the ability to make a positive difference in the world, both as individuals and as part of the entire company of Tetra Tech. This is a real key aspect of our ability to attract and retain top talent. When we look at how Tetra Tech impacts the world, our workforce is committed to our aspirational goal of improving the lives of 1 billion people through the projects that we do every day.

Now I'd like to move to guidance for the first quarter of the fiscal year and for the entirety of fiscal year 2024. Our guidance is as follows. And before I move into the numbers with respect to earnings per share, I want to both book in this at the beginning, probably the middle and the end that our guidance for fiscal year 2024 and the first quarter are on a GAAP basis. I know I spoke to the difference between U.S. GAAP and IFRS earlier. And so if you want to compare these to IFRS, add 6 percentage points to these, and you'll be pretty close.

With respect to the first quarter, our net revenue guidance is for a range of USD 950 million to USD 1 billion. Over the first quarter with an associated earnings per share, and I'll state an associated GAAP earnings per share of $1.30 to $1.38 for the entire year of fiscal year 2024. Our net revenue is for a range of $4.05 billion to $4.25 billion, with an associated GAAP earnings per share of $5.70 to $6. We went ahead and did the calculations for you, the midpoint on a GAAP 2023 to a GAAP 2024, which I've just outlined, would impute a midpoint. The midpoint of our guidance range would be in a 11% top line or revenue growth with an associated 15% at the midpoint of GAAP earnings per share growth. Some of the assumptions if you're following along on the webcast or reviewing the slides. This includes -- and this is different than what we had done in Q2, 3 and 4 of 2023. This includes the charge or cost of intangible amortization, which we estimate at $42 million for the fiscal year. I do know for those modeling. There will be questions as to how does that actually get charged per quarter. So you can see in the footnotes here, $12 million in Q1, $11 million in Q2, $10 million in Q3 and $9 million in Q4. So for modeling purposes, are estimating our quarterly charges for IA, you can use this.

We do assume we have an effective tax rate of 27% for the year, 54 million average diluted shares outstanding and as has been our practice, this excludes any additional contributions of revenue or income from future acquisitions that we would complete after today.

In summary, as we enter fiscal year 2024, we see very strong demand for our differentiated leading with sciences, water, environmental and sustainable infrastructure services. For fiscal year 2023, we set new all-time records across the board, and I'm very pleased to have just presented to you, we expect to go up from there. The strong culture alignment with RPS is accelerating our combined opportunities in supporting our growth and performance goals for fiscal year 2024. And just as a restatement, RPS is culturally fits so well with the company. While it's been 9 months, from getting close to 10 months here, it feels like they've been with us for 20 years. They're part of the culture, they're part of the company, they're part of the contribution. And frankly, the best is still yet to come as we move forward.

No doubt, our record orders in the fourth quarter and strong backlog support our ambitious targets that we have set for net revenue and earnings per share growth in 2024. And with that, I'm very pleased to have presented to you the results of both the fourth quarter all of fiscal year 2023 and our outlook for 2024.

And with that, Melissa, I would like to open up the call for questions.

[Operator]

[Operator Instructions] Our first question comes from the line of Sam Kusswurm with William Blair.

[Samuel Kusswurm, analyst]

I guess to start, I wanted to ask a little bit about physical stimulus, namely the IIJA which I know you highlighted in your prepared remarks. I understand you won quite a few contracts but are still in the early stages here. But based on what you see today, do you expect a more material impact to your backlog in fiscal 2024. And when you expect -- and when do you expect IIJA related projects to have a peak impact in your business? Is that more of a 2025 time frame?

[Dan Batrack, executive]

It's a great question. There's no doubt IIJA or the infrastructure stimulus program has been maybe the hottest topic that has been asked ever since we got passed into law here getting close to 2 years ago now. For us, we're seeing the first revenue contributions, and I know your question went to backlog, and I'll address that. But we are now seeing actual revenue contributions from specific clear earmarked programs associated with IIJA. We did press release earlier just this week, a $33 million lock and dam inland navigation program for the Army Corps of Engineers that is not just a contract capacity, is within a $200 million contract that we were awarded and it's a $33 million individual project.

So I'll work a little bit backwards on this for this year, fiscal year 2024. And we've got a little bit less than $50 million anticipated to contribute to revenues. You can see that $33 million program will largely be completed over this next year. It really accounts for pretty much only what we have in orders already. And so we think this is the beginning of a ramp-up. We think this year, we'll see backlog begin to grow. We've got just probably a little under $50 million in backlog. So that's what we've calculated for revenue contribution this year. Hopefully, it turns out to be conservative, but that's what we see this year.

I do see it continuing to ramp I think that we'll add more contract capacity. It's already measured in hundreds of millions of dollars just for IIJA programs. I expect that number to go up quite significantly as we move toward the end of this fiscal year in contract capacity and orders. I do think that the peak, and we'll let you know as we get closer to the end of the year, but it does look like the peak for us would be late 2025 and early 2026. So I think that the number this year that we have embedded, again, is around $50 million of actual revenue. I think that number will go up by several fold when you move into 2025. And since we are very early in the program with respect to infrastructure projects, both on the initial permitting initial design layout we should see that much earlier than others would see it in the overall duration of the IIJA program.

[Samuel Kusswurm, analyst]

Very helpful. I appreciate the color there. maybe attributing to offshore wind next then. We've seen some negative news flows over the last month or 2 related to offshore wind from the no bid activity in the U.K. to some comments made by developers. -- also see negative headlines on the solar side. Can you remind me how big the renewables business is for you and whether you expect these recent developments to impact your business in the coming quarters?

[Dan Batrack, executive]

That's another great question, Sam. It's interesting, we, of course, see these headlines. So let me start with how big is Tetra Tech's renewable energy business overall right now?

It's about 5% of our business. So it's about $200 million a year. Half of it has been long-standing traditional work with hydro or hydro power production. So that's about $100 million. So that leaves the other $100 million roughly. So a couple of percent for the company associated with wind, both on and offshore and solar primarily. That makes up the rest.

Now the headlines with respect to offshore wind being more expensive, potentially more difficult to move online. In many ways, it's actually -- I don't want to say it's good news. We never want anything that's difficult for our clients to be good news. But it actually is from a project standpoint, good news for us because we can help our clients actually find different ways to get their projects completed at a lower price point. So if they would do it in a more traditional manner. And I would say with other firms that might be less experienced, have less technical approach to it, their projects may not be viable. But certainly, some of the approaches that we have to make these projects more viable, and in the instances where they don't fit within their economic portfolio, we can actually come up with contributions on how they actually might move this to other developers who would fit within their economics.

With respect to the one big developer who did cancel 2 programs, on the East Coast of the U.S., those were not 2 of our programs. So we're not associated with those at all. I certainly have had a few incoming calls asking how disruptive is that to our business. And I said, not only is it not disruptive, the experts for Tetra Tech that are running other offshore winds for the same developer that are moving forward have commented to me that this is actually good. They'll likely be resold to other developers, if they elect not to move forward themselves and that would actually give us a chance to move forward with them. So in a strange way, this is actually not moving forward with the existing leaseholders give us additional opportunities beyond what we even had today.

So we don't actually see it as a negative. I think I shared with you the current dollar amount that we're doing in this field now. And I think the future still looks very promising in this area. I've always said that it's not going to be a perfectly smooth downhill road on this. There's going to be a pothole or a speed bump along the way. I would put these in that category. But the final destination of expanding the renewable or alternative energy generation is without question. where the industry and frankly, the world is going, and we want to be at the forefront of making that happen.

[Operator]

Our next question comes from the line of Tate Sullivan with Maxim Group.

[Tate Sullivan, analyst]

Really jumped out the implied number -- order amount of $1.665 billion. And Dan, you said earlier that you had new programs across Australia, Canada and U.K., were those international orders a larger portion of those -- the total orders for the quarter?

[Dan Batrack, executive]

They weren't. They were really they were stronger than we normally see from those geographies that you just mentioned, Australia, Canada, U.K. But the fourth quarter of our fiscal year aligns with the end of the U.S. Federal government year. And that's when the final funding where some, say, the final -- I don't want to use the -- final topping off of projects takes place. So typically, in the fourth quarter is our biggest order from the U.S. federal government and that was definitely the case. So I would say Q1, Q2, Q3 are more representative of other sources. But the fourth quarter is the federal government's truing everything up from what they didn't spend during the year and that's what really drove the biggest numbers.

[Tate Sullivan, analyst]

And then did you say earlier still a goal for going forward to have CIG margins move closer to GSG, particularly with the large number of commercial orders that you highlighted on the slide?

[Dan Batrack, executive]

Well, yes. I think my ambitious goal is -- and this is to all the Tetra Tech experts and management in the CIG side. I'm looking forward to CIG eclipsing GSG. So -- but I guess we first got to match and it's getting closer. I think that the performance in the commercial side has been good. And -- but I will say that some of the extraordinary contributions such as disasters, some of the emergency work we do regarding very high priorities, can make catching them a little bit more difficult. But notwithstanding these extraordinary revenue contributions that drives very high utilization and positively impacts margins. If you sort of set that aside, maybe in 2024, CIG will catch them. So yes, we're looking for them to catch. And really the commercial side has the potential to be higher than the government side in a robust economic environment.

[Operator]

Our next question comes from the line of Andrew Wittmann with Baird.

[Andrew J. Wittmann, analyst]

I guess the first couple that I want to ask or just to understand the quarter a little bit better and then talk a little bit more about on the forward look. But just, Dan, I don't think you commented on the benefit to revenue from the activities you had in Ukraine for the quarter. Recognizing that those can be episodic. Obviously, they were back in the second quarter of '23 than not in third quarter back here in the fourth quarter. You'd probably smart to have that quantified unless I missed that. And then just maybe just because the margins in GSG in the fourth quarter we're obviously very good beyond what we were thinking. Just wondering if there was any award fees, incentive fees that hit in the quarter that are just notable, maybe not individually, but in totality, given that there sometimes are fees paid to you when you get a lot of awards. And obviously, the backlog here this quarter showing that you have a lot of awards. So if you could just comment on those two things to start off, I think that would be helpful.

[Dan Batrack, executive]

Yes, those are 2 great points with respect to things that were sort of standouts or great contributors in our fourth quarter. I'll start with Ukraine.

Ukraine, we have been doing what I call a -- an ongoing assistance level that we had even before the outbreak of the hostilities in Ukraine, which has probably been maybe $10 million a quarter or something like that, but we did an additional $40 million. So I think if you actually looked at Ukraine overall, we are probably just slightly above $50 million in the quarter and $40 million of that, I would call incrementally higher than what we had anticipated coming in. That was for a lot of humanitarian work and now it is cost plus work. So it is a very low risk to the company. We don't carry a big margin in that work for supporting humanitarian work. We do get paid quite quickly, and it's a low risk financially, but it does carry slightly lower margins. So -- what was the good thing in the quarter is it did help drive by about $40 million to beat on the top end revenue, Ukraine specifically. Above what we sort of had anticipated at the sort of maintenance level that we are doing, both in Ukraine and we have other areas around the world. but it did contribute to earnings per share. But actually, it kind of moderated the margin that we had in GSG because that carried lower margins. So it was good. On the revenue side, it was good on EPS, but on margin. So there's two sides to that coin.

But with respect to margins in the quarter, we did not have a true award fee or any special award from our clients to make up for the great work we have done. But conversely, on the other side, we did have additional fee from just great performance from our project managers, and I would call those project closeouts. The examples of those are, we often carry a small amount in our projects, 1% or 2% for contingency in the event that there's something that might have to be reworked or additional comments from regulators on some aspect. And a lot of these projects were closed out with no comment and in fact, accelerated approval from the regulators and outside stakeholders on our work. So that also contributed to, I would say, a byproduct of it or sort of a bank shot that contributed. You can see it in our DSO. When you're getting paid that quick and that much in advance of what your regular schedule is, you can see it in the DSO. And you see it at 54 days. And that also means when you're getting paid that quick and projects are going that well, then you're able to close out without having to use up contingency items. So I would say there was a project closeouts in the fourth quarter just because of excellent project management and technical delivery from our staff across the company.

[Andrew J. Wittmann, analyst]

That makes sense, and it's helpful context. Just digging a little bit here next into the guidance, it might be helpful actually for you guys just to comment on the interest expense, given that interest rates have been changing and are so much higher. Maybe you want to give that and then we can all kind of back into your EBITDA. But when you get to the EBITDA, it looks like there's certainly some margin improvement baked into '24 over '23. Certainly, that makes sense. It sounds like your utilization is very good, and it sounds like you've been getting better here. You've got year-over-year benefits from the cost synergies that you've got in flight but haven't been recognized yet in the first quarter, second quarter and even into the third quarter from RPS. And then there's even some of these mix things that we talked about. There's always puts and takes on mix, but certainly, a lot of Ukraine contribution, like you just talked about, mixes margins down. You had the incentive fee the other way, mix it up. But I guess maybe that would be helpful for you to kind of level set us about what the implicit EBITDA margin is and how much it is year-over-year? And where is could be to make it even better than what you've guided? It seems like it's good, but it could even be better if the year unfolds like you're saying it could.

[Dan Batrack, executive]

There's a lot of moving pieces there. Let me start at a high level, and then I'll let Steve talk to interest in some of the other items embedded within the company that we have. So for instance, our IAs up hired this year, because having RPS for a full year. But let me start at a high level.

We do -- we have embedded, if you do the calculations of our low end of our revenue range to the low end of our EPS range. You'd see there's about a 50 basis point increase. In fact, you'd see it quite uniform. If you went high, high and mid, mid and you did the calculation, you'll see about a 50 basis point increase. I do think if you take a look at a favorable mix, which might be a low end of revenue and a high end of EPS, you'd be up at about an 80 basis point increase within fiscal year 2024. So that's sort of a range.

I will say that RPS was not with Tetra Tech in the first quarter of last year. It didn't join us until the very end of January. So our guidance for the first quarter margins are actually weighed on a little bit, even though they're higher than last year, they are weighed on a little bit because RPS' margins still are not at a level of Tetra Tech. In fact, Tetra Tech is up around 13-ish percent, maybe a little more, and they'll be coming into the year around 10%.

So in the first quarter, while you'd expect margins to continue to increase, I will comment that we have about 20% additional revenue, which represents RPS at a lower margin. And of course, it will ramp through the year. So I think there are a number of puts and takes. But overall, I would go to the annual year at somewhere between 50 to 80 basis points depending on how you take the comparisons of different components of our margin within guidance for 2024.

And let me have Steve speak to some of the individual moving items such as interest and other items.

[Steven Burdick, executive]

Yes. So Andy, if you take a look at our model, the -- based on the run rate of depreciation each quarter, midpoint is probably about $26 million of depreciation next year. amortization, it was on Dan's slide up there. You saw about $42 million. Our net interest cost probably somewhere between $40 million and $45 million is what we're looking at. So the midpoint, about $42.5 million. And those are probably those moving pieces to get to an EBITDA number.

[Operator]

Our next question comes from the line of Ryan Connors with North Coast Research.

[Ryan Connors, analyst]

So I want to go stick on the Federal side, Dan, and you're one of the few companies that's actually seeing, it seems like a tangible impact from some of the stimulus infrastructure spending. You definitely -- we're not hearing that from the equipment providers at this point and even some of your peers on the engineering side, we're not hearing that there either. One of the things it seems that is a recurring theme is that Build America provisions, the BABA provisions are kind of a headwind and impediment obstacle of those funds getting deployed and yet you are seeing it. So how do we interpret that? Is it your upstream nature that you don't necessarily rely on actual projects in the field, but you're doing upstream study work? I mean, why do you think that is that you're seeing that a little sooner?

[Dan Batrack, executive]

Yes, I think you've hit it right. And I think it went to the comment I had while it's a different end market, my comments on offshore wind. And my comment was that before anything that's built you actually have to come up with a plan before you'll build something. So the Buy America Build America and have something built here, that comes much farther down the road. That's after -- so I sort of see the projects with respect to service providers in 4 areas. There's where Tetra Tech resides, which is the upfront valuation, technology assessment, initial layout permitting. And so that's us. That's what Tetra Tech does.

Second phase is -- and this goes to the other engineering companies, then you move to the full-service engineering firms that will actually do detailed as-built drawings constructible drawings. And they'll take it from where we typically would leave at about a 30% design and they'll take it all the way through detailed design, constructible design drawings. And those are a hallmark of large engineering houses typically characterize themselves as engineering companies, which we don't and have an attribute of having offshore low-cost engineering centers. So look for people who have big houses in Malaysia, India and places like that, they were in Phase II. We can be very busy and they can never see a dollar of revenue unless the project is going to go to being prepared to go out Phase III, which really begins to move into the BABA or the Buy America Build America. Those folks that are after it's been built or anticipating it being built, and you're bidding either a design build project, which would be putting together the engineering and the constructor.

And so that third piece is the construction piece. And that's -- you're not going to see anything coming out of the BABA part of the work until it's ready to be it's already been bid and they're ready to move forward. Then you're going to see it move. And that could be anywhere from I don't know and the fastest I've ever seen it maybe 6 months to 9 months later. And when we finish our work, not start or finish it until they just get started, and then they'll move later.

And then the fourth area I consider is really the commissioning and the O&M or the operation and maintenance people, which is the tail end of the projects once they've been commissioned. So almost every project that has a capital aspect to it has those 4 faces.

You might conflate number 2 and 3, the engineering and the construction when you go to a design build but that doesn't encroach on the work that we do before. You can't go to a design build project, which then would trigger BABA spending and both backlog funding and anything that you'd visibly see from IIJA until after you've done what I call the Phase I. Phase I though hallmarks, which is classic Tetra Tech, sole source, limited competition, smaller project, much more diverse. And I don't want to call it completely immune or insulated from whether or not you build it or not, but largely decoupled, largely decoupled. And frankly, when there's difficulties in supply chain, cost of materials, availability of construction trade labor with that, that actually means there's more opportunity, and it's even more important to go back to your Phase 1 provider. And we're one of those, and frankly, in certain areas like water, environment, sustainable infrastructure. We're clearly a market leader in those areas.

But there's other segments, there's other people that are -- will benefit from IIJA, but I hope that sort of describes how we see this in a relationship with respect to what's coming out of IIJA. And I would say for those that are farther downstream in general Phases 2, 3 and 4 they should be encouraged that we're seeing numbers come out both in contract capacity and revenue because it's pretty difficult to get to Phase 2, 3 and 4 without Phase 1.

[Ryan Connors, analyst]

Yes. No, that's great color. I appreciate that detail, Dan. And then my other question, just, look, nobody denies things are great today and optimism is a great quality and management. And I think you given us all the positives. But just if I can get you to kind of talk about some of the risks that keep you up at night in the business. And specifically looking at some data this morning about your stock and, it's been much more volatile historically in election years than not. And I look at the last 30 years, stock has been twice as volatile in election years as it has in nonelection years, and we're getting ready to go into an election year. So can you talk qualitatively about kind of the, how you see the different scenarios politically? I know you said you still think we're a year or 2 off from the peak in the current spending plan. But what are the scenarios you see out there and particularly focusing on -- what are the risks in the business? Because certainly, listening to the call today, it seems like there's very few things keeping up at night, but there must be some risk factors and specifically related to the election and maybe the budgetary situation.

[Steven Burdick, executive]

Well, I'm glad that we are not on a video conference today because you would see a very tired worn out, Dan.

[Dan Batrack, executive]

Well, what keeps me awake at night and has got me awake, coming up to even tomorrow because it isn't signed yet is the dysfunction with the U.S. Congress and government shutdown. We were sitting there in September. It was going to be a shutdown. They extended it for 6 weeks, which is until tomorrow. At the beginning of this week, it's -- I think that through the media, it's -- there's no way they can come to any agreement and then they'll suddenly come to a bipartisan continuing resolution. But until it's signed, I'm not sleeping. And so what makes me feel uncomfortable is the dysfunction with the U.S. federal government and shutdowns.

Now do I have a plan for what I'm going to do when that happens is Tetra Tech yes, we're going to make sure that our clients have funded us for more than 30 days in advance before it gets shut down. So we do all these sorts of things. But records are made to be broken and not just our financial performance, but the amount of time the government shut down, who knows if 35-ish days is the new high. Maybe they're going to go, maybe they're going to go for the gusto and go 60 days and I will sleep over that. I really do.

I'll tell you, any time there's disruption on these, it makes me feel very uncomfortable. And so that is some of the areas that I pay a lot of attention to. Unfortunately, it's not something other than my boat as a single individual to vote for people that will be collaborators and move things forward. So those are things that do make me feel pretty uncomfortable. I do -- I do guess I say lose sleep on it, but that would be true. It is a high level of concern. I will say that outside the U.S. federal government, I thought you made a great point in that 40% of our revenues are now outside the U.S. So we are much more diversified. So I will say, a sneeze by the U.S. government may give us a cold, but it's not going to be terminal for us. So I -- things aren't perfect here, we're not immune from the upside. We do look to be optimistic with respect to not just our words, but our actions to be prepared for multiple contingency plans on different scenarios, but there's no doubt the federal government -- I would say that some would comment -- let me just go to on the flip side, with the government, though. And you did mention this is the volatility of Tetra Tech stock during an election year. This goes all the way back to the -- I think it was the Roosevelt era a long, long time ago, it was 100 years ago almost. And it's during election year, a chicken in every pot. So during an election year, politicians are not looking to say, "I want to become more fiscally restrained. " They are not saying, "I want to spend less and take away your bridge or I want to take away your short protection, or I want to take away whatever your individual project in your jurisdiction might be.

Typically, election years are the opposite, which are, "I have more gifts for you" to garner additional support for both.So I would say the volatility kind of runs around that level of perspective. And we can look at it, maybe they have different priorities, the Republicans and Democrats, but one might want to build one item for border protection and someone might want to build items for water and environment. But I haven't seen even under the most stringent proposal, either side say I want less.

[Operator]

Our next question comes from the line of Michael Dudas with Vertical Research Partners.

[Michael Dudas, analyst]

Obviously, given what you talked about with your growth in the business and certainly the opportunities internationally, and it seems like evidence that the RPS simulation has gone quite well and probably can really kick into gear in the next 12 to 18 months. How are you thinking about as you reset and recapitalize on the balance sheet, it sounds like you'll be paying down further debt with the strong cash flow. How do you think about going forward relative to your historic kind of tuck-in smaller type acquisitions versus the opportunistic RPS? What do you see over the next couple of years? Is it kind of in between, just opportunistic either way, I want to share how you're taking through that as you kind of meet some of these pretty aggressive markets that seem like you need your services for quite a few years.

[Dan Batrack, executive]

Well, when we -- after RPS, one of the premises we had when we had RPS joined us, and yes, it was our largest acquisition. Yes, it was 5,000 people. And yes, it expanded our U.K. and Australia footprints. And yes, it did take our leverage up to just over 2x, which is right at the upper end of our range. But my discussion with our CFO and treasury staff is, we want to do this but without inhibiting at all Tetra Tech's long-term plan to add technology experts, companies that can bring us new clients or new areas for growth. So Steve Burdick, this is great. It's going to be great for operations, but you've got to keep that channel open. And that was part of what drove the convert -- convertible debt that we put in place. I expect that you'll see continued more of what we have done for years and years and years, which are small, we call them tuck-ins, some of the scaling bolt-ons, which has just sort of assimilate them into the company. They come in as equal partners with the corporation. They're super important for us. They lead the technical areas for all of Tetra Tech. So if you're out there in firm that's looking to think about is it a good fit for Tetra Tech. You don't come to a Tetra Tech to work for us. You come to Tetra Tech to lead us all. And so those will continue to take place.

And if, I know Steve presented on the slide and prepared remarks that we have $800 million of existing today capacity, which would be more than enough to do what we just transacted with RPS. But that's just what's available today. We have access to over $2 billion in direct line of sight funding that we could trigger within, frankly, within a few phone calls. So if there are opportunistic entities that would make sense for Tetra Tech, our capital structure is not such that our balance sheet would be an inhibitor. In fact, as an enabler. So I would just say that we expect business as usual with respect to adding companies that bring in new technologies, access to new clients or round out some of the geography we have within Australia, Canada, the U.K. portions of Europe and the U.S. But if the right company comes on -- comes along, that actually makes sense and that will make us better than we are today both for today and the long term, we do not bet on companies coming here to make us better than 10 years from now. We know that will be the case if they come with us. But we wanted to actually show it and demonstrate it to our shareholders today. And I know we've used that they'll be GAAP accretive on year 1. That's still our goal for the small tuck-ins.

I do know like RPS, some of that are much larger and much more complicated. We may have a quarter or 2 to -- that they'll be cash accretive but it may take a quarter or 2 for the GAAP portion. So expect more and more of the same. We'll continue to move forward with the companies that fit with us. That should not be a surprise. And that isn't even felt we're below the midpoint. As Steve had indicated, we're below the midpoint of the range that we'd like to reside in between 1 and 2x. We're below 1.5x, 1.4x if we don't do an acquisition in the next 6 weeks, that ratios continue to get favorable during this year.

[Michael Dudas, analyst]

Seems like your business development team will be busy. Dan, I appreciate your thoughts. Thank you.

[Operator]

Ladies and gentlemen, that concludes our question-and-answer session. I'll turn the floor back to Mr. Batrack for any final comments.

[Dan Batrack, executive]

Well, thank you very much, Melissa. I appreciate -- you're moderating the call today. And I'd like to thank everyone who's followed the company been supportive of us during fiscal year 2023. I think we're off to a bright start to 2024. I'm really looking forward to talking to you in about 90 days from now on our next quarterly call to tell you how we've started off in the first quarter. And with that, I hope you enjoy not only today, the rest of this week, but I hope you have a safe and enjoyable holiday season. Thank you very much.

[Operator]

Thank you. This concludes today's conference. You may disconnect your lines at this time. Thank you for your participation.