Taxation & Salary APIWeb Calculator UI

Free New Tax Regime FY 2026-27 Calculator API (2026)

Official New Tax Regime calculation API for FY 2026-27.

Interactive API Playground & Live Test

GET/api/v1/income-tax

Zero Auth • Open CORS

Query Parameters

incomenumber • required

Gross annual income in ₹; the ₹75,000 standard deduction is subtracted for you

regimestring • optional

new (default), which is the FY 2026-27 slab table

curl -X GET "https://fincalculator.in/api/v1/income-tax?income=1500000&regime=new" \
  -H "Accept: application/json"

Live JSON Response (HTTP 200 OK)

Click "Execute Live API Request" below...

Request Parameters Schema

Parameter	Type	Required	Description / Notes
income	number	Required	Gross annual income in ₹; the ₹75,000 standard deduction is subtracted for you
regime	string	Optional	new (default), which is the FY 2026-27 slab table

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Frequently Asked Questions (FAQs)

Is the Free New Tax Regime FY 2026-27 Calculator API free to use in production apps?

Yes! All FinCalculator REST APIs are completely free, zero-auth, open-CORS, and edge-cached for high performance across global web and mobile applications.

What is the rate limit for /api/v1/income-tax?

Endpoints are cached at the edge for 24 hours. There are no restrictive rate limits for standard web traffic and mobile applications.