Is the Free Short-Term Capital Gains (STCG 20%) Tax 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/capital-gains?

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

Taxation & Salary APIWeb Calculator UI

Free Short-Term Capital Gains (STCG 20%) Tax API (2026)

API calculating Budget 2024 STCG 20% flat tax on equity trading profits.

Interactive API Playground & Live Test

GET/api/v1/capital-gains

Zero Auth • Open CORS

Query Parameters

gainnumber • required

Total STCG equity capital gain in ₹

curl -X GET "https://fincalculator.in/api/v1/capital-gains?gain=150000" \
  -H "Accept: application/json"

Live JSON Response (HTTP 200 OK)

Click "Execute Live API Request" below...

Request Parameters Schema

Parameter	Type	Required	Description / Notes
gain	number	Required	Total STCG equity capital gain in ₹

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