Investment APIWeb Calculator UI

Free Recurring Deposit (RD) Calculator API (2026)

Public API for bank and post office recurring deposit maturity calculations.

Interactive API Playground & Live Test

GET/api/v1/compounding

Zero Auth • Open CORS

Query Parameters

contributionnumber • required

Monthly deposit in ₹

ratenumber • required

Annual RD interest rate %

yearsnumber • required

Tenure in years

curl -X GET "https://fincalculator.in/api/v1/compounding?contribution=5000&rate=7&years=3" \
  -H "Accept: application/json"

Live JSON Response (HTTP 200 OK)

Click "Execute Live API Request" below...

Request Parameters Schema

Parameter	Type	Required	Description / Notes
contribution	number	Required	Monthly deposit in ₹
rate	number	Required	Annual RD interest rate %
years	number	Required	Tenure in years

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Frequently Asked Questions (FAQs)

Is the Free Recurring Deposit (RD) 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/compounding?

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