{
  "cik": 831641,
  "cik_padded": "0000831641",
  "entityName": "TETRA TECH INC",
  "fiscal_years": [
    {
      "accn": "0000831641-25-000032",
      "filed": "2025-11-20",
      "fiscal_year": 2025,
      "form": "10-K",
      "fundamental_units": {
        "buybacks": "USD",
        "capex": "USD",
        "cash": "USD",
        "cost_of_revenue": "USD",
        "dividends_paid": "USD",
        "eps_diluted": "USD/shares",
        "free_cash_flow": "USD",
        "gross_profit": "USD",
        "net_income": "USD",
        "operating_cash_flow": "USD",
        "operating_income": "USD",
        "revenue": "USD",
        "stockholders_equity": "USD",
        "total_assets": "USD"
      },
      "fundamentals": {
        "buybacks": 249984000.0,
        "capex": 18633000.0,
        "cash": 167459000.0,
        "cost_of_revenue": 4481246000.0,
        "dividends_paid": 65039000.0,
        "eps_diluted": 0.93,
        "free_cash_flow": 439052000.0,
        "gross_profit": 961344000.0,
        "net_income": 247949000.0,
        "operating_cash_flow": 457685000.0,
        "operating_income": 408419000.0,
        "revenue": 5442590000.0,
        "stockholders_equity": 1779785000.0,
        "total_assets": 4282174000.0
      },
      "period_end": "2025-09-28",
      "ratio_units": {
        "gross_margin": "ratio",
        "net_margin": "ratio",
        "operating_margin": "ratio",
        "payout_ratio": "ratio",
        "revenue_growth_yoy": "ratio",
        "roa_avg2y": "ratio",
        "roa_period_end": "ratio",
        "roe_avg2y": "ratio",
        "roe_period_end": "ratio"
      },
      "ratios": {
        "gross_margin": 0.1766335513055365,
        "net_margin": 0.04555717039130267,
        "operating_margin": 0.07504129467771778,
        "payout_ratio": 0.2623079746238138,
        "revenue_growth_yoy": 0.0469178804846385,
        "roa_avg2y": 0.05851407399540995,
        "roa_period_end": 0.057902598072848054,
        "roe_avg2y": 0.1373637955883302,
        "roe_period_end": 0.13931401826625125
      }
    },
    {
      "accn": "0000831641-25-000032",
      "filed": "2025-11-20",
      "fiscal_year": 2024,
      "form": "10-K",
      "fundamental_units": {
        "buybacks": "USD",
        "capex": "USD",
        "cash": "USD",
        "cost_of_revenue": "USD",
        "dividends_paid": "USD",
        "eps_diluted": "USD/shares",
        "free_cash_flow": "USD",
        "gross_profit": "USD",
        "net_income": "USD",
        "operating_cash_flow": "USD",
        "operating_income": "USD",
        "revenue": "USD",
        "stockholders_equity": "USD",
        "total_assets": "USD"
      },
      "fundamentals": {
        "buybacks": 0.0,
        "capex": 18135000.0,
        "cash": 232689000.0,
        "cost_of_revenue": 4332239000.0,
        "dividends_paid": 58828000.0,
        "eps_diluted": 1.23,
        "free_cash_flow": 340573000.0,
        "gross_profit": 866440000.0,
        "net_income": 333443000.0,
        "operating_cash_flow": 358708000.0,
        "operating_income": 500737000.0,
        "revenue": 5198679000.0,
        "stockholders_equity": 1830322000.0,
        "total_assets": 4192676000.0
      },
      "period_end": "2024-09-29",
      "ratio_units": {
        "gross_margin": "ratio",
        "net_margin": "ratio",
        "operating_margin": "ratio",
        "payout_ratio": "ratio",
        "revenue_growth_yoy": "ratio",
        "roa_avg2y": "ratio",
        "roa_period_end": "ratio",
        "roe_avg2y": "ratio",
        "roe_period_end": "ratio"
      },
      "ratios": {
        "gross_margin": 0.1666654163490379,
        "net_margin": 0.06413994785983132,
        "operating_margin": 0.0963200459193576,
        "payout_ratio": 0.1764259558605219,
        "revenue_growth_yoy": 0.14950171916286167,
        "roa_avg2y": 0.0832239194733958,
        "roa_period_end": 0.07952987543039339,
        "roe_avg2y": 0.20622650757401226,
        "roe_period_end": 0.1821772343882661
      }
    },
    {
      "accn": "0000831641-25-000032",
      "filed": "2025-11-20",
      "fiscal_year": 2023,
      "form": "10-K",
      "fundamental_units": {
        "buybacks": "USD",
        "capex": "USD",
        "cash": "USD",
        "cost_of_revenue": "USD",
        "dividends_paid": "USD",
        "eps_diluted": "USD/shares",
        "free_cash_flow": "USD",
        "gross_profit": "USD",
        "net_income": "USD",
        "operating_cash_flow": "USD",
        "operating_income": "USD",
        "revenue": "USD",
        "stockholders_equity": "USD",
        "total_assets": "USD"
      },
      "fundamentals": {
        "buybacks": 0.0,
        "capex": 26901000.0,
        "cash": 168831000.0,
        "cost_of_revenue": 3797521000.0,
        "dividends_paid": 52113000.0,
        "eps_diluted": 1.02,
        "free_cash_flow": 341562000.0,
        "gross_profit": 725029000.0,
        "net_income": 273452000.0,
        "operating_cash_flow": 368463000.0,
        "operating_income": 358113000.0,
        "revenue": 4522550000.0,
        "stockholders_equity": 1403433000.0,
        "total_assets": 3820477000.0
      },
      "period_end": "2023-10-01",
      "ratio_units": {
        "gross_margin": "ratio",
        "net_margin": "ratio",
        "operating_margin": "ratio",
        "payout_ratio": "ratio",
        "revenue_growth_yoy": "ratio",
        "roa_avg2y": "ratio",
        "roa_period_end": "ratio",
        "roe_avg2y": "ratio",
        "roe_period_end": "ratio"
      },
      "ratios": {
        "gross_margin": 0.16031420327027893,
        "net_margin": 0.06046411869409957,
        "operating_margin": 0.0791838675083747,
        "payout_ratio": 0.19057457981656745,
        "revenue_growth_yoy": 0.2906643972913613,
        "roa_avg2y": 0.08488010636863087,
        "roa_period_end": 0.07157535564276397,
        "roe_avg2y": 0.2114439478527133,
        "roe_period_end": 0.19484506919817335
      }
    },
    {
      "accn": "0000831641-24-000063",
      "filed": "2024-11-19",
      "fiscal_year": 2022,
      "form": "10-K",
      "fundamental_units": {
        "buybacks": "USD",
        "capex": "USD",
        "cash": "USD",
        "cost_of_revenue": "USD",
        "dividends_paid": "USD",
        "eps_diluted": "USD/shares",
        "free_cash_flow": "USD",
        "gross_profit": "USD",
        "net_income": "USD",
        "operating_cash_flow": "USD",
        "operating_income": "USD",
        "revenue": "USD",
        "stockholders_equity": "USD",
        "total_assets": "USD"
      },
      "fundamentals": {
        "buybacks": 200000000.0,
        "capex": 10582000.0,
        "cash": 185094000.0,
        "cost_of_revenue": 2928489000.0,
        "dividends_paid": 46099000.0,
        "eps_diluted": 0.97,
        "free_cash_flow": 325606000.0,
        "gross_profit": 575559000.0,
        "net_income": 263164000.0,
        "operating_cash_flow": 336188000.0,
        "operating_income": 340446000.0,
        "revenue": 3504048000.0,
        "stockholders_equity": 1183087000.0,
        "total_assets": 2622776000.0
      },
      "period_end": "2022-10-02",
      "ratio_units": {
        "gross_margin": "ratio",
        "net_margin": "ratio",
        "operating_margin": "ratio",
        "payout_ratio": "ratio",
        "revenue_growth_yoy": "ratio",
        "roa_avg2y": "ratio",
        "roa_period_end": "ratio",
        "roe_avg2y": "ratio",
        "roe_period_end": "ratio"
      },
      "ratios": {
        "gross_margin": 0.16425545540472047,
        "net_margin": 0.07510285247234057,
        "operating_margin": 0.09715791564499117,
        "payout_ratio": 0.17517213600644466,
        "revenue_growth_yoy": 0.09041040132714571,
        "roa_avg2y": 0.10122981041047918,
        "roa_period_end": 0.10033796252520229,
        "roe_avg2y": 0.21773158346519397,
        "roe_period_end": 0.22243841746211396
      }
    },
    {
      "accn": "0000831641-23-000082",
      "filed": "2023-11-22",
      "fiscal_year": 2021,
      "form": "10-K",
      "fundamental_units": {
        "buybacks": "USD",
        "capex": "USD",
        "cash": "USD",
        "cost_of_revenue": "USD",
        "dividends_paid": "USD",
        "eps_diluted": "USD/shares",
        "free_cash_flow": "USD",
        "gross_profit": "USD",
        "net_income": "USD",
        "operating_cash_flow": "USD",
        "operating_income": "USD",
        "revenue": "USD",
        "stockholders_equity": "USD",
        "total_assets": "USD"
      },
      "fundamentals": {
        "buybacks": 60000000.0,
        "capex": 8573000.0,
        "cash": 166568000.0,
        "cost_of_revenue": 2715113000.0,
        "dividends_paid": 40041000.0,
        "eps_diluted": 4.26,
        "free_cash_flow": 295799000.0,
        "gross_profit": 498400000.0,
        "net_income": 232831000.0,
        "operating_cash_flow": 304372000.0,
        "operating_income": 278701000.0,
        "revenue": 3213513000.0,
        "stockholders_equity": 1234238000.0,
        "total_assets": 2576562000.0
      },
      "period_end": "2021-10-03",
      "ratio_units": {
        "gross_margin": "ratio",
        "net_margin": "ratio",
        "operating_margin": "ratio",
        "payout_ratio": "ratio",
        "revenue_growth_yoy": "ratio",
        "roa_avg2y": "ratio",
        "roa_period_end": "ratio",
        "roe_avg2y": "ratio",
        "roe_period_end": "ratio"
      },
      "ratios": {
        "gross_margin": 0.15509506263083422,
        "net_margin": 0.07245372898755972,
        "operating_margin": 0.08672782714742402,
        "payout_ratio": 0.17197452229299362,
        "revenue_growth_yoy": 0.07299831613237343,
        "roa_avg2y": 0.09397592792909153,
        "roa_period_end": 0.09036499024669307,
        "roe_avg2y": 0.20499683697129326,
        "roe_period_end": 0.18864351932123302
      }
    },
    {
      "accn": "0000831641-22-000123",
      "filed": "2022-11-25",
      "fiscal_year": 2020,
      "form": "10-K",
      "fundamental_units": {
        "buybacks": "USD",
        "capex": "USD",
        "cash": "USD",
        "cost_of_revenue": "USD",
        "dividends_paid": "USD",
        "eps_diluted": "USD/shares",
        "free_cash_flow": "USD",
        "gross_profit": "USD",
        "net_income": "USD",
        "operating_cash_flow": "USD",
        "operating_income": "USD",
        "revenue": "USD",
        "stockholders_equity": "USD",
        "total_assets": "USD"
      },
      "fundamentals": {
        "buybacks": 117188000.0,
        "capex": 12245000.0,
        "cash": 157515000.0,
        "cost_of_revenue": 2548356000.0,
        "dividends_paid": 34743000.0,
        "eps_diluted": 3.16,
        "free_cash_flow": 250234000.0,
        "gross_profit": 446535000.0,
        "net_income": 173890000.0,
        "operating_cash_flow": 262479000.0,
        "operating_income": 241091000.0,
        "revenue": 2994891000.0,
        "stockholders_equity": 1037319000.0,
        "total_assets": 2378558000.0
      },
      "period_end": "2020-09-27",
      "ratio_units": {
        "gross_margin": "ratio",
        "net_margin": "ratio",
        "operating_margin": "ratio",
        "payout_ratio": "ratio",
        "revenue_growth_yoy": "ratio",
        "roa_avg2y": "ratio",
        "roa_period_end": "ratio",
        "roe_avg2y": "ratio",
        "roe_period_end": "ratio"
      },
      "ratios": {
        "gross_margin": 0.14909891545301648,
        "net_margin": 0.058062213282553524,
        "operating_margin": 0.08050075946002709,
        "payout_ratio": 0.19979872333084134,
        "revenue_growth_yoy": -0.036190668055203344,
        "roa_avg2y": 0.07684105448428026,
        "roa_period_end": 0.07310731964492773,
        "roe_avg2y": 0.17160719528472496,
        "roe_period_end": 0.1676340643524316
      }
    },
    {
      "accn": "0000831641-21-000110",
      "filed": "2021-11-24",
      "fiscal_year": 2019,
      "form": "10-K",
      "fundamental_units": {
        "buybacks": "USD",
        "capex": "USD",
        "cash": "USD",
        "cost_of_revenue": "USD",
        "dividends_paid": "USD",
        "eps_diluted": "USD/shares",
        "free_cash_flow": "USD",
        "gross_profit": "USD",
        "net_income": "USD",
        "operating_cash_flow": "USD",
        "operating_income": "USD",
        "revenue": "USD",
        "stockholders_equity": "USD",
        "total_assets": "USD"
      },
      "fundamentals": {
        "buybacks": 100000000.0,
        "capex": 16198000.0,
        "cash": 120732000.0,
        "cost_of_revenue": 2699165000.0,
        "dividends_paid": 29674000.0,
        "eps_diluted": 2.84,
        "free_cash_flow": 192315000.0,
        "gross_profit": 408183000.0,
        "net_income": 158761000.0,
        "operating_cash_flow": 208513000.0,
        "operating_income": 188762000.0,
        "revenue": 3107348000.0,
        "stockholders_equity": 989286000.0,
        "total_assets": 2147408000.0
      },
      "period_end": "2019-09-29",
      "ratio_units": {
        "gross_margin": "ratio",
        "net_margin": "ratio",
        "operating_margin": "ratio",
        "payout_ratio": "ratio",
        "revenue_growth_yoy": "ratio",
        "roa_avg2y": "ratio",
        "roa_period_end": "ratio",
        "roe_avg2y": "ratio",
        "roe_period_end": "ratio"
      },
      "ratios": {
        "gross_margin": 0.13136056856200207,
        "net_margin": 0.05109212099835616,
        "operating_margin": 0.0607469778087295,
        "payout_ratio": 0.1869098834096535,
        "revenue_growth_yoy": 0.0483106781442762,
        "roa_avg2y": 0.07731561260524848,
        "roa_period_end": 0.07393145596924292,
        "roe_avg2y": 0.16231098470190777,
        "roe_period_end": 0.1604803868648702
      }
    },
    {
      "accn": "0000831641-20-000154",
      "filed": "2020-11-23",
      "fiscal_year": 2018,
      "form": "10-K",
      "fundamental_units": {
        "buybacks": "USD",
        "capex": "USD",
        "cash": "USD",
        "cost_of_revenue": "USD",
        "dividends_paid": "USD",
        "eps_diluted": "USD/shares",
        "free_cash_flow": "USD",
        "gross_profit": "USD",
        "net_income": "USD",
        "operating_cash_flow": "USD",
        "operating_income": "USD",
        "revenue": "USD",
        "stockholders_equity": "USD",
        "total_assets": "USD"
      },
      "fundamentals": {
        "buybacks": 75000000.0,
        "capex": 9726000.0,
        "cash": 146185000.0,
        "cost_of_revenue": 2579690000.0,
        "dividends_paid": 24477000.0,
        "eps_diluted": 2.42,
        "free_cash_flow": 176007000.0,
        "gross_profit": 384458000.0,
        "net_income": 136957000.0,
        "operating_cash_flow": 185733000.0,
        "operating_income": 190086000.0,
        "revenue": 2964148000.0,
        "stockholders_equity": 966971000.0,
        "total_assets": 1959421000.0
      },
      "period_end": "2018-09-30",
      "ratio_units": {
        "gross_margin": "ratio",
        "net_margin": "ratio",
        "operating_margin": "ratio",
        "payout_ratio": "ratio",
        "revenue_growth_yoy": "ratio",
        "roa_avg2y": "ratio",
        "roa_period_end": "ratio",
        "roe_avg2y": "ratio",
        "roe_period_end": "ratio"
      },
      "ratios": {
        "gross_margin": 0.12970270040497303,
        "net_margin": 0.04620450800702259,
        "operating_margin": 0.06412837685567657,
        "payout_ratio": 0.1787203282782187,
        "revenue_growth_yoy": 0.0765566435191911,
        "roa_avg2y": 0.07092237878951863,
        "roa_period_end": 0.0698966684546098,
        "roe_avg2y": 0.1445133120610481,
        "roe_period_end": 0.14163506454692024
      }
    },
    {
      "accn": "0000831641-19-000193",
      "filed": "2019-11-29",
      "fiscal_year": 2017,
      "form": "10-K",
      "fundamental_units": {
        "buybacks": "USD",
        "capex": "USD",
        "cash": "USD",
        "cost_of_revenue": "USD",
        "dividends_paid": "USD",
        "eps_diluted": "USD/shares",
        "free_cash_flow": "USD",
        "gross_profit": "USD",
        "net_income": "USD",
        "operating_cash_flow": "USD",
        "operating_income": "USD",
        "revenue": "USD",
        "stockholders_equity": "USD",
        "total_assets": "USD"
      },
      "fundamentals": {
        "buybacks": 100000000.0,
        "capex": 9741000.0,
        "cash": 189975000.0,
        "cost_of_revenue": 2399722000.0,
        "dividends_paid": 21672000.0,
        "eps_diluted": 2.04,
        "free_cash_flow": 131746000.0,
        "gross_profit": 353638000.0,
        "net_income": 117917000.0,
        "operating_cash_flow": 141487000.0,
        "operating_income": 183342000.0,
        "revenue": 2753360000.0,
        "stockholders_equity": 928453000.0,
        "total_assets": 1902745000.0
      },
      "period_end": "2017-10-01",
      "ratio_units": {
        "gross_margin": "ratio",
        "net_margin": "ratio",
        "operating_margin": "ratio",
        "payout_ratio": "ratio",
        "roa_avg2y": "ratio",
        "roa_period_end": "ratio",
        "roe_avg2y": "ratio",
        "roe_period_end": "ratio"
      },
      "ratios": {
        "gross_margin": 0.12843870761542261,
        "net_margin": 0.042826582793387,
        "operating_margin": 0.06658845919167854,
        "payout_ratio": 0.18379029317231613,
        "roa_avg2y": 0.06367826966964438,
        "roa_period_end": 0.06197204564983747,
        "roe_avg2y": 0.1311856404140374,
        "roe_period_end": 0.1270037363226787
      }
    },
    {
      "accn": "0000831641-18-000097",
      "filed": "2018-11-16",
      "fiscal_year": 2016,
      "form": "10-K",
      "fundamental_units": {
        "buybacks": "USD",
        "capex": "USD",
        "cash": "USD",
        "dividends_paid": "USD",
        "eps_diluted": "USD/shares",
        "free_cash_flow": "USD",
        "gross_profit": "USD",
        "net_income": "USD",
        "operating_cash_flow": "USD",
        "operating_income": "USD",
        "stockholders_equity": "USD",
        "total_assets": "USD"
      },
      "fundamentals": {
        "buybacks": 99500000.0,
        "capex": 11945000.0,
        "cash": 160459000.0,
        "dividends_paid": 19735000.0,
        "eps_diluted": 1.42,
        "free_cash_flow": 130075000.0,
        "gross_profit": 330211000.0,
        "net_income": 83853000.0,
        "operating_cash_flow": 142020000.0,
        "operating_income": 135855000.0,
        "stockholders_equity": 869259000.0,
        "total_assets": 1800779000.0
      },
      "period_end": "2016-10-02",
      "ratio_units": {
        "payout_ratio": "ratio",
        "roa_period_end": "ratio",
        "roe_period_end": "ratio"
      },
      "ratios": {
        "payout_ratio": 0.23535234279035933,
        "roa_period_end": 0.04656484776866012,
        "roe_period_end": 0.09646492012162083
      }
    }
  ],
  "latest_filing": {
    "accn": "0000831641-25-000032",
    "filed": "2025-11-20",
    "form": "10-K"
  },
  "note": "Static grepcent export of verified SEC companyfacts-derived values. Monetary values are raw reported units from grepcent's resolved facts; no scaling and no FX conversion. Capex, dividends, and buybacks are reported as positive outflow magnitudes. ROE/ROA include both period-end basis (site-consistent) and average-of-two-years basis where the prior-year denominator exists.",
  "schema_version": "1",
  "sic": "8711",
  "sic_description": "Services-Engineering Services",
  "source_urls": {
    "sec_companyfacts": "https://data.sec.gov/api/xbrl/companyfacts/CIK0000831641.json",
    "sec_submissions": "https://data.sec.gov/submissions/CIK0000831641.json"
  },
  "ticker": "TTEK"
}
