Is the Free Post Office Monthly Income Scheme (POMIS) 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/compounding?

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

Government Schemes APIWeb Calculator UI

Free Post Office Monthly Income Scheme (POMIS) API (2026)

POMIS API calculating monthly guaranteed income payouts for single (£9L) and joint (£15L) accounts.

Interactive API Playground & Live Test

GET/api/v1/compounding

Zero Auth • Open CORS

Query Parameters

principalnumber • required

Deposit amount in ₹ (up to ₹9L single / ₹15L joint)

ratenumber • optional

Annual interest rate % (default: 7.4)

curl -X GET "https://fincalculator.in/api/v1/compounding?principal=900000&rate=7.4" \
  -H "Accept: application/json"

Live JSON Response (HTTP 200 OK)

Click "Execute Live API Request" below...

Request Parameters Schema

Parameter	Type	Required	Description / Notes
principal	number	Required	Deposit amount in ₹ (up to ₹9L single / ₹15L joint)
rate	number	Optional	Annual interest rate % (default: 7.4)

Related Government Schemes APIs

GET /api/v1/ssyFree Sukanya Samriddhi Yojana (SSY) Calculator API GET /api/v1/apyFree Atal Pension Yojana (APY) Calculator API GET /api/v1/nscFree National Savings Certificate (NSC) Calculator API GET /api/v1/compoundingFree Public Provident Fund (PPF) Calculator API