APIVerve

Income Tax Brackets API

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Run tax calculations against federal brackets and standard deductions.

Income Tax Brackets retrieves federal income tax brackets, marginal rates, and standard deductions across all US filing statuses. Paid plans can query specific historical tax years back to 2000.

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GETapi.apiverve.com/v1/incometax?country=US
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{
  "status": "ok",
  "error": null,
  "data": {
    "year": 2025,
    "country": "US",
    "type": "federal",
    "brackets": {
      "single": [
        {
          "rate": 0.1,
          "min": 0,
          "max": 11924
        },
        {
          "rate": 0.12,
          "min": 11925,
          "max": 48474
        },
        {
          "rate": 0.22,
          "min": 48475,
          "max": 103349
        },
        {
          "rate": 0.24,
          "min": 103350,
          "max": 197299
        },
        {
          "rate": 0.32,
          "min": 197300,
          "max": 250524
        },
        {
          "rate": 0.35,
          "min": 250525,
          "max": 626349
        },
        {
          "rate": 0.37,
          "min": 626350,
          "max": 999999999
        }
      ],
      "married_filing_jointly": [
        {
          "rate": 0.1,
          "min": 0,
          "max": 23849
        },
        {
          "rate": 0.12,
          "min": 23850,
          "max": 96949
        },
        {
          "rate": 0.22,
          "min": 96950,
          "max": 206699
        },
        {
          "rate": 0.24,
          "min": 206700,
          "max": 394599
        },
        {
          "rate": 0.32,
          "min": 394600,
          "max": 501049
        },
        {
          "rate": 0.35,
          "min": 501050,
          "max": 751599
        },
        {
          "rate": 0.37,
          "min": 751600,
          "max": 999999999
        }
      ],
      "married_filing_separately": [
        {
          "rate": 0.1,
          "min": 0,
          "max": 11924
        },
        {
          "rate": 0.12,
          "min": 11925,
          "max": 48474
        },
        {
          "rate": 0.22,
          "min": 48475,
          "max": 103349
        },
        {
          "rate": 0.24,
          "min": 103350,
          "max": 197299
        },
        {
          "rate": 0.32,
          "min": 197300,
          "max": 250524
        },
        {
          "rate": 0.35,
          "min": 250525,
          "max": 375799
        },
        {
          "rate": 0.37,
          "min": 375800,
          "max": 999999999
        }
      ],
      "head_of_household": [
        {
          "rate": 0.1,
          "min": 0,
          "max": 16999
        },
        {
          "rate": 0.12,
          "min": 17000,
          "max": 64849
        },
        {
          "rate": 0.22,
          "min": 64850,
          "max": 103349
        },
        {
          "rate": 0.24,
          "min": 103350,
          "max": 197299
        },
        {
          "rate": 0.32,
          "min": 197300,
          "max": 250499
        },
        {
          "rate": 0.35,
          "min": 250500,
          "max": 626349
        },
        {
          "rate": 0.37,
          "min": 626350,
          "max": 999999999
        }
      ]
    },
    "standard_deduction": {
      "single": 15000,
      "married_filing_jointly": 30000,
      "married_filing_separately": 15000,
      "head_of_household": 22500
    },
    "lastUpdated": "2026-02-07T06:02:41.898Z",
    "marriagePenalty": {
      "appliesFromRate": 0.37,
      "singleThreshold": 626350,
      "jointThreshold": 751600,
      "jointShortfall": 501100
    },
    "effectiveRateCurve": {
      "single": [
        {
          "income": 25000,
          "taxableIncome": 10000,
          "tax": 1000,
          "effectiveRate": 0.04,
          "marginalRate": 0.1
        },
        {
          "income": 50000,
          "taxableIncome": 35000,
          "tax": 3961.4,
          "effectiveRate": 0.0792,
          "marginalRate": 0.12
        },
        {
          "income": 100000,
          "taxableIncome": 85000,
          "tax": 13613.78,
          "effectiveRate": 0.1361,
          "marginalRate": 0.22
        },
        {
          "income": 250000,
          "taxableIncome": 235000,
          "tax": 52262.32,
          "effectiveRate": 0.209,
          "marginalRate": 0.32
        },
        {
          "income": 1000000,
          "taxableIncome": 985000,
          "tax": 321468.9,
          "effectiveRate": 0.3215,
          "marginalRate": 0.37
        }
      ],
      "married_filing_jointly": [
        {
          "income": 25000,
          "taxableIncome": 0,
          "tax": 0,
          "effectiveRate": 0,
          "marginalRate": 0.1
        },
        {
          "income": 50000,
          "taxableIncome": 20000,
          "tax": 2000,
          "effectiveRate": 0.04,
          "marginalRate": 0.1
        },
        {
          "income": 100000,
          "taxableIncome": 70000,
          "tax": 7922.9,
          "effectiveRate": 0.0792,
          "marginalRate": 0.12
        },
        {
          "income": 250000,
          "taxableIncome": 220000,
          "tax": 38493.56,
          "effectiveRate": 0.154,
          "marginalRate": 0.24
        },
        {
          "income": 1000000,
          "taxableIncome": 970000,
          "tax": 282961.15,
          "effectiveRate": 0.283,
          "marginalRate": 0.37
        }
      ],
      "married_filing_separately": [
        {
          "income": 25000,
          "taxableIncome": 10000,
          "tax": 1000,
          "effectiveRate": 0.04,
          "marginalRate": 0.1
        },
        {
          "income": 50000,
          "taxableIncome": 35000,
          "tax": 3961.4,
          "effectiveRate": 0.0792,
          "marginalRate": 0.12
        },
        {
          "income": 100000,
          "taxableIncome": 85000,
          "tax": 13613.78,
          "effectiveRate": 0.1361,
          "marginalRate": 0.22
        },
        {
          "income": 250000,
          "taxableIncome": 235000,
          "tax": 52262.32,
          "effectiveRate": 0.209,
          "marginalRate": 0.32
        },
        {
          "income": 1000000,
          "taxableIncome": 985000,
          "tax": 326479.9,
          "effectiveRate": 0.3265,
          "marginalRate": 0.37
        }
      ],
      "head_of_household": [
        {
          "income": 25000,
          "taxableIncome": 2500,
          "tax": 250,
          "effectiveRate": 0.01,
          "marginalRate": 0.1
        },
        {
          "income": 50000,
          "taxableIncome": 27500,
          "tax": 2959.9,
          "effectiveRate": 0.0592,
          "marginalRate": 0.12
        },
        {
          "income": 100000,
          "taxableIncome": 77500,
          "tax": 10224.78,
          "effectiveRate": 0.1022,
          "marginalRate": 0.22
        },
        {
          "income": 250000,
          "taxableIncome": 227500,
          "tax": 48123.32,
          "effectiveRate": 0.1925,
          "marginalRate": 0.32
        },
        {
          "income": 1000000,
          "taxableIncome": 977500,
          "tax": 316955.65,
          "effectiveRate": 0.317,
          "marginalRate": 0.37
        }
      ]
    },
    "changes": {
      "versusYear": 2024,
      "indexingPercent": 2.794,
      "bracketShifts": {
        "single": [
          {
            "rate": 0.12,
            "from": 11600,
            "to": 11925,
            "shiftPercent": 2.802
          },
          {
            "rate": 0.22,
            "from": 47150,
            "to": 48475,
            "shiftPercent": 2.81
          },
          {
            "rate": 0.24,
            "from": 100525,
            "to": 103350,
            "shiftPercent": 2.81
          },
          {
            "rate": 0.32,
            "from": 191950,
            "to": 197300,
            "shiftPercent": 2.787
          },
          {
            "rate": 0.35,
            "from": 243725,
            "to": 250525,
            "shiftPercent": 2.79
          },
          {
            "rate": 0.37,
            "from": 609350,
            "to": 626350,
            "shiftPercent": 2.79
          }
        ],
        "married_filing_jointly": [
          {
            "rate": 0.12,
            "from": 23200,
            "to": 23850,
            "shiftPercent": 2.802
          },
          {
            "rate": 0.22,
            "from": 94300,
            "to": 96950,
            "shiftPercent": 2.81
          },
          {
            "rate": 0.24,
            "from": 201050,
            "to": 206700,
            "shiftPercent": 2.81
          },
          {
            "rate": 0.32,
            "from": 383900,
            "to": 394600,
            "shiftPercent": 2.787
          },
          {
            "rate": 0.35,
            "from": 487450,
            "to": 501050,
            "shiftPercent": 2.79
          },
          {
            "rate": 0.37,
            "from": 731200,
            "to": 751600,
            "shiftPercent": 2.79
          }
        ],
        "married_filing_separately": [
          {
            "rate": 0.12,
            "from": 11600,
            "to": 11925,
            "shiftPercent": 2.802
          },
          {
            "rate": 0.22,
            "from": 47150,
            "to": 48475,
            "shiftPercent": 2.81
          },
          {
            "rate": 0.24,
            "from": 100525,
            "to": 103350,
            "shiftPercent": 2.81
          },
          {
            "rate": 0.32,
            "from": 191950,
            "to": 197300,
            "shiftPercent": 2.787
          },
          {
            "rate": 0.35,
            "from": 243725,
            "to": 250525,
            "shiftPercent": 2.79
          },
          {
            "rate": 0.37,
            "from": 365600,
            "to": 375800,
            "shiftPercent": 2.79
          }
        ],
        "head_of_household": [
          {
            "rate": 0.12,
            "from": 16550,
            "to": 17000,
            "shiftPercent": 2.719
          },
          {
            "rate": 0.22,
            "from": 63100,
            "to": 64850,
            "shiftPercent": 2.773
          },
          {
            "rate": 0.24,
            "from": 100500,
            "to": 103350,
            "shiftPercent": 2.836
          },
          {
            "rate": 0.32,
            "from": 191950,
            "to": 197300,
            "shiftPercent": 2.787
          },
          {
            "rate": 0.35,
            "from": 243700,
            "to": 250500,
            "shiftPercent": 2.79
          },
          {
            "rate": 0.37,
            "from": 609350,
            "to": 626350,
            "shiftPercent": 2.79
          }
        ]
      },
      "standardDeduction": {
        "single": {
          "from": 14600,
          "to": 15000,
          "change": 400,
          "changePercent": 2.74
        },
        "married_filing_jointly": {
          "from": 29200,
          "to": 30000,
          "change": 800,
          "changePercent": 2.74
        },
        "married_filing_separately": {
          "from": 14600,
          "to": 15000,
          "change": 400,
          "changePercent": 2.74
        },
        "head_of_household": {
          "from": 21900,
          "to": 22500,
          "change": 600,
          "changePercent": 2.74
        }
      }
    }
  }
}

About the Income Tax Brackets API

Income Tax Brackets works by aggregating federal income tax data from official sources including the Tax Foundation and IRS publications. Data covers all filing statuses (single, married filing jointly, married filing separately, head of household) with historical data back to 2000.

What people use it for

Payroll Withholding Engine
Payroll software matches employee gross pay against standard deductions and marginal rates to compute accurate federal tax withholdings.
Retirement Income Planning
When modeling pension and 401(k) drawdowns, financial advisory tools test projected distributions against married filing jointly brackets.
Mortgage Underwriting Review
Determine net monthly borrower income by evaluating gross salaries against federal deduction thresholds and rate tiers during credit assessments.
Tax Audit Reviews
Accounting platforms audit amended tax returns by checking declared earnings against historical rate bands and deduction amounts.

Ways to call it

One endpoint, many ways in — REST with JSON, XML, YAML and CSV, plus GraphQL and an MCP interface for AI agents.

JSON
Default REST response
XML
Markup format
YAML
Human-readable
CSV
Tabular export
Beta
GraphQL
Query language
New
MCP
For AI agents
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Other ways to use Income Tax Brackets

Same data, same APIVerve account, same credit balance — one key works on all of them.

Give it to an AI agentConnect over MCP and your agent calls it as a native tool — Claude, Cursor, ChatGPT.on VerveKit Google Sheets or ExcelA =VERVE() formula fills a column — no script, no export, recalculates in place.on VerveSheets Ground an agent on itA cited, machine-checkable fact your model can't produce on its own.on VerveContext

Questions.

Common questions about the Income Tax Brackets API.

Read the docs →
Which filing statuses and tax years are supported?
The API covers all four US federal filing statuses: single, married filing jointly, married filing separately, and head of household. Historical bracket tables and standard deductions go back to the year 2000 on paid plans. Currently, only US federal tax data is supported.
Is it cheap enough to check tax brackets for every calculation?
Yes. Each lookup costs 2 credits, giving you 100 calls every month on the Free plan. On the Starter plan, 200,000 credits cover 100,000 bracket lookups each month, which works out to about $0.30 per 1,000 calls.
Are the marriage penalty and inflation adjustment metrics included free?
No. Detailed analytics such as the marriage penalty shortfall, the effective rate curve, and year-over-year changes like bracket shifts and indexing percentages are premium fields. Querying custom tax years also requires a paid plan. Every paid plan, starting with Starter, unlocks all premium fields.
Where does the tax bracket data come from?
Data is compiled directly from official sources, including published IRS publications and Tax Foundation releases. Each response includes a timestamp showing when the bracket table was last refreshed.
How does the response represent the highest tax bracket?
Because the highest marginal tax bracket has no upper income ceiling, the maximum income field for the top band in each filing status returns null. Your calculation logic only needs to verify whether income exceeds the minimum threshold for that band.
Can I use this bracket data inside a commercial tax planning tool?
Yes, as long as you subscribe to any paid plan. You can use the tax brackets and deduction figures inside your own commercial calculators, applications, and reports. You may not resell or redistribute the raw tax dataset as a standalone product.
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