---
title: "Income Tax Calculator"
method: GET
path: "/api/calc/income-tax-calculator"
tags: ["Finance"]
---

# Income Tax Calculator

`GET /api/calc/income-tax-calculator`

## Request

- Base URL: `https://calcbright.com`
- URL: `https://calcbright.com/api/calc/income-tax-calculator`
- Auth: none declared

Uses the 2026 IRS brackets and $16,100 standard deduction (Rev. Proc. 2025-32). See federal tax slice by slice, marginal vs effective rate, plus state tax.

## Query parameters

- `filing` 'single' | 'married' | 'hoh' | 'mfs': Filing status
- `income` number: Gross annual income Wages, self-employment profit, interest and other ordinary income.
- `pretax` number: Pre-tax deductions 401(k), traditional IRA, HSA, etc.
- `deduction` 'standard' | 'itemized': Deduction
- `itemized` number: Total itemized deductions Mortgage interest, state & local taxes (SALT), charity, medical above 7.5% of AGI.
- `state` 'AL' | 'AK' | 'AZ' | 'AR' | 'CA' | 'CO' | 'CT' | 'DE' | 'DC' | 'FL' | 'GA' | 'HI' | 'ID' | 'IL' | 'IN' | 'IA' | 'KS' | 'KY' | 'LA' | 'ME' | 'MD' | 'MA' | 'MI' | 'MN' | 'MS' | 'MO' | 'MT' | 'NE' | 'NV' | 'NH' | 'NJ' | 'NM' | 'NY' | 'NC' | 'ND' | 'OH' | 'OK' | 'OR' | 'PA' | 'RI' | 'SC' | 'SD' | 'TN' | 'TX' | 'UT' | 'VT' | 'VA' | 'WA' | 'WV' | 'WI' | 'WY': State
- `stateRate` number: State effective tax rate (%) Your state has progressive rates – enter your approximate effective rate.

## Response `200`

Calculation result

- CalcOutput
  - `ok` boolean
  - `tool` string
  - `name` string
  - `url` string: Open this link to see the full calculation
  - `inputs` object
  - `summary` string: Plain-text answer
  - `details` string
  - `result` object
  - `errors` object

## Other responses

- `400`: Invalid input (see errors)

---

[API](https://skmtc.dev/calcbright/apis/calcbright-calculator-api.md) · [All operations](https://skmtc.dev/calcbright/apis/calcbright-calculator-api/llms.txt) · [OpenAPI document](https://skmtc.dev/calcbright/apis/calcbright-calculator-api/revisions/f58229e56e58?raw)