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RD Calculator

This RD calculator uses the standard recurring-deposit maturity formula — the same one banks and the post office apply, where each monthly instalment compounds quarterly for the time it has left to run. It opens on a ₹5,000/month RD at 6.7% for 5 years; change any number and the maturity value updates instantly, entirely on your device.

  • Nothing you type leaves this page
  • Works offline once loaded
  • Free forever, no signup
Tenure

12 months = 1 year. Most bank and post-office RDs run 6 months to 10 years.

Capped at ₹1,50,000 per year by the PPF rules.

Set quarterly by the government — check the current notified rate before relying on this.

How to use this tool

  1. Enter your monthly instalment

    The fixed amount you commit to depositing every month for the tenure.

  2. Set the interest rate and tenure

    RD rates are usually close to FD rates for the same bank and tenure — check your bank's or the post office's current RD card rate.

  3. Read the maturity value

    Total deposited, interest earned and the final maturity amount update instantly as you change any field.

Questions people ask

How is RD maturity calculated?

Using M = R × [(1+i)ⁿ − 1] / (1 − (1+i)^(−1/3)), where R is the monthly instalment, i is the rate ÷ 400 (a quarterly rate) and n is the number of quarters — the standard formula Indian banks and the post office use for recurring deposits.

What is the maturity of a ₹5,000/month RD for 5 years at 6.7%?

About ₹3.57 lakh, on ₹3 lakh deposited — roughly ₹57,000 of interest. The formula compounds each instalment quarterly for the months it has left to run, which is why the interest is a bit less than a lump-sum FD of the same total at the same rate.

Why is RD interest lower than FD interest on the same total amount?

Because your money doesn't all sit in the deposit from day one — the first instalment earns interest for the full tenure, but the last instalment earns almost none, since it goes in right before maturity. An FD, by contrast, has the entire amount earning interest from month one.

Is post office RD interest the same as bank RD interest?

The formula is the same quarterly-compounding structure, but the rate differs — the post office RD rate is set quarterly by the government and is often close to, sometimes a touch above, typical bank RD rates. Enter your actual rate here regardless of which you're comparing.

Is RD interest taxable?

Yes, at your income-tax slab rate, just like FD interest — and banks deduct TDS once your interest across deposits with them crosses the yearly threshold. The maturity figure here is before tax.

Is my deposit information private?

Yes — the calculation runs entirely in your browser, nothing is uploaded, and the page keeps working offline once it has loaded.

Related tools

Free because it costs us nothing to run: your browser does the work, not our servers. Made by Dynamb Technologies — we build software for businesses.