Tetra Tech Inc (TTEK) Tax Rate (2009 - 2026)
Tetra Tech (TTEK) reported Tax Rate of 27.17% for fiscal Q3 2026 (quarter ended Jun 28, 2026), down 0.15 percentage points from 27.32% a year earlier but up 0.83 percentage points from the prior quarter.
Tetra Tech Inc (TTEK) Tax Rate (2009 - 2026) Analysis & Trends
Over the twelve months ended Jun 28, 2026, Tetra Tech's Tax Rate came in at 26.50%, down 9.62 percentage points year-over-year; for FY2025 (ended Sep 28, 2025), it came in at 34.34%, up 6.28 percentage points from FY2024.
- Tax Rate has a five-year change of +10.61 percentage points (FY2020 to FY2025).
- By fiscal year, Tax Rate came in at 28.05% in FY2024 (-3.75 pp), 31.80% in FY2023 (+7.26 pp), 24.54% in FY2022 (+11.79 pp) and 12.75% in FY2021 (-10.97 pp).
- Five-year quarterly Tax Rate spans a low of -5.52% in fiscal Q4 2021 and a high of 94.92% in fiscal Q1 2025.
- Year over year, Tax Rate has now declined in each of the last five quarters, with an average year-over-year change of -2.52 percentage points over the last eight quarters.
- The high point for year-over-year Tax Rate in five years was fiscal Q1 2025 (a gain of 68.79 percentage points); the low point was fiscal Q1 2026 (a drop of 69.24 percentage points).
- Per Business Quant data, the three fiscal quarters before Q3 2026 came in at 26.34% (Q2 2026), 25.68% (Q1 2026) and 26.72% (Q4 2025).
Peer Comparison
Historic Data
| Date | Value |
|---|---|
| Jun 28, 2026 | 27.17% |
| Mar 29, 2026 | 26.34% |
| Dec 28, 2025 | 25.68% |
| Sep 28, 2025 | 26.72% |
| Jun 29, 2025 | 27.32% |
| Mar 30, 2025 | 82.60% |
| Dec 29, 2024 | 94.92% |
| Sep 29, 2024 | 28.99% |
| Jun 30, 2024 | 27.71% |
| Mar 31, 2024 | 29.07% |
| Dec 31, 2023 | 26.13% |
| Oct 1, 2023 | 43.16% |
| Jul 2, 2023 | 27.25% |
| Apr 2, 2023 | 38.00% |
| Jan 1, 2023 | 24.54% |
| Oct 2, 2022 | 25.99% |
| Jul 3, 2022 | 27.57% |
| Apr 3, 2022 | 25.68% |
| Jan 2, 2022 | 18.76% |
| Jun 27, 2021 | 22.58% |
Tetra Tech Inc Tax Rate API
Pull this series into your own models, spreadsheets and apps with the Business Quant
Historical Metrics API. The request below matches the chart above — change the
frequency, period or values and it follows. Swap YOUR_API_KEY for your own key.
https://data.businessquant.com/historic?slug=tax-rate&ticker=TTEK&period=max&api_key=YOUR_API_KEYimport requests
url = "https://data.businessquant.com/historic"
params = {"slug": "tax-rate", "ticker": "TTEK", "period": "max", "api_key": "YOUR_API_KEY"}
data = requests.get(url, params=params).json()const res = await fetch("https://data.businessquant.com/historic?slug=tax-rate&ticker=TTEK&period=max&api_key=YOUR_API_KEY");
const data = await res.json();