United States was Tetra Tech’s largest region in fiscal 2025, bringing in $3.45B of $5.44B (63%).
| Geography | FY 2009 | FY 2010 | FY 2011 | FY 2012 | FY 2013 | FY 2014 | FY 2015 | FY 2016 | FY 2017 | FY 2018 | FY 2019 | FY 2020 | FY 2021 | FY 2022 | FY 2023 | FY 2024 | FY 2025 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| United States | $2.42B | $2.86B | $3.20B | $3.45B | |||||||||||||
| Sales Revenue, Services, Net | — | — | — | — | |||||||||||||
| Foreign Countries | $1.09B | — | — | — | |||||||||||||
| United Kingdom | — | $601.16M | $711.62M | $771.72M | |||||||||||||
| Australia | — | $449.51M | $529.11M | $489.10M | |||||||||||||
| Canada | — | $436.22M | $498.58M | $512.30M | |||||||||||||
| Other Countries | — | $172.03M | $260.55M | $223.63M | |||||||||||||
| Total | $3.50B | $4.52B | $5.20B | $5.44B |
Tetra Tech brought in $5.44B from its five regions in fiscal 2025, the year ended September 28, 2025. That was up 4.7% from $5.20B in fiscal 2024. United States was the largest at $3.45B (63.3%), ahead of United Kingdom at $771.72M (14.2%) and Canada at $512.30M (9.4%). The other two regions brought in $712.73M combined.
Compared with fiscal 2024, United Kingdom grew fastest, up 8.4% to $771.72M, while Other Countries fell the most, down 14.2% to $223.63M.
Tetra Tech began breaking out United Kingdom in fiscal 2023, Australia in fiscal 2023, Canada in fiscal 2023 and Other Countries in fiscal 2023. Tetra Tech stopped reporting Foreign Countries as a separate region after fiscal 2022, when it brought in $1.09B.
Cig was Tetra Tech’s largest segment in fiscal 2025, bringing in $2.84B of $5.52B (52%).
| Segment | FY 2010 | FY 2011 | FY 2012 | FY 2013 | FY 2014 | FY 2015 | FY 2016 | FY 2017 | FY 2018 | FY 2019 | FY 2020 | FY 2021 | FY 2022 | FY 2023 | FY 2024 | FY 2025 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gsg | $1.82B | $2.16B | $2.48B | $2.67B | ||||||||||||
| Cig | $1.74B | $2.42B | $2.79B | $2.84B | ||||||||||||
| Rme | — | — | — | — | ||||||||||||
| Wei | — | — | — | — | ||||||||||||
| Tss | — | — | — | — | ||||||||||||
| Sales Revenue, Services, Net | — | — | — | — | ||||||||||||
| Ecs | — | — | — | — | ||||||||||||
| Rcm | — | — | — | — | ||||||||||||
| Inter-Segment Elimination | — | — | — | — | ||||||||||||
| Total | $3.56B | $4.58B | $5.27B | $5.52B |
Tetra Tech brought in $5.52B from its two segments in fiscal 2025, the year ended September 28, 2025. That was up 4.7% from $5.27B in fiscal 2024. Cig was the largest at $2.84B (51.5%), ahead of Gsg at $2.67B (48.5%).
Compared with fiscal 2024, Gsg grew 7.7% to $2.67B and Cig grew 2.1% to $2.84B. From fiscal 2022 to 2025, combined revenue from these segments grew from $3.56B to $5.52B, a compound annual growth rate of 15.7%. Cig's share of the total rose from 48.8% to 51.5%.
International was Tetra Tech’s largest revenue line in fiscal 2025, bringing in $2.03B of $5.44B (37%).
| Customer | FY 2009 | FY 2010 | FY 2011 | FY 2012 | FY 2013 | FY 2014 | FY 2015 | FY 2016 | FY 2017 | FY 2018 | FY 2019 | FY 2020 | FY 2021 | FY 2022 | FY 2023 | FY 2024 | FY 2025 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| U.S. Government | $1.06B | $1.39B | $1.68B | $1.72B | |||||||||||||
| U.S. Federal Government | — | — | — | — | |||||||||||||
| Sales Revenue, Services, Net | — | — | — | — | |||||||||||||
| International | $1.09B | $1.66B | $2.00B | $2.03B | |||||||||||||
| Commercial | $748.95M | $869.46M | $909.64M | $899.30M | |||||||||||||
| U.S. Commercial | — | — | — | — | |||||||||||||
| U.S Commercial | — | — | — | — | |||||||||||||
| U.S. State & Local Government | $603.29M | $607.07M | $613.19M | $789.97M | |||||||||||||
| Total | $3.50B | $4.52B | $5.20B | $5.44B |
Tetra Tech brought in $5.44B from its four revenue lines in fiscal 2025, the year ended September 28, 2025. That was up 4.7% from $5.20B in fiscal 2024. International was the largest at $2.03B (37.4%), ahead of U.S. Government at $1.72B (31.6%) and Commercial at $899.30M (16.5%). The remaining revenue line, U.S. State & Local Government, brought in $789.97M.
Compared with fiscal 2024, U.S. State & Local Government grew fastest, up 28.8% to $789.97M, while Commercial fell the most, down 1.1% to $899.30M. From fiscal 2022 to 2025, combined revenue from these revenue lines grew from $3.50B to $5.44B, a compound annual growth rate of 15.8%. International's share of the total rose from 31.0% to 37.4%.
Tetra Tech (TTEK) reports its revenue by geography, by segment and by customer. In fiscal 2025, United States was its largest region, bringing in $3.45B (63.3% of the total), followed by United Kingdom at $771.72M (14.2%).
United States was Tetra Tech's largest region in fiscal 2025, bringing in $3.45B, or 63.3% of the $5.44B total across its five regions.
Cig was Tetra Tech's largest segment in fiscal 2025, bringing in $2.84B, or 51.5% of the $5.52B total across its two segments.
International was Tetra Tech's largest revenue line in fiscal 2025, bringing in $2.03B, or 37.4% of the $5.44B total across its four revenue lines.
Among Tetra Tech's regions that make up at least 2% of revenue, United Kingdom grew fastest in fiscal 2025, up 8.4% from $711.62M to $771.72M.
Every figure comes from Tetra Tech's annual financial filings, as reported. Each line keeps the name Tetra Tech gives it, and years follow its fiscal calendar.
Tetra Tech's revenue by geography goes back to fiscal 2009, with figures through fiscal 2025. The latest four fiscal years are free to view, and the full history is available with a Business Quant subscription.