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Savings & Retirement Schemes

FD Calculator

Estimate fixed-deposit maturity and interest with clear cumulative-compounding and payout assumptions.

By Nitin Raturi · Last reviewed

Your deposit details

How to use this FD Calculator

Enter the deposit details and choose how interest is handled.

  1. Enter the deposit amount, annual rate and tenure.
  2. Choose cumulative interest or periodic interest payout.
  3. Choose the compounding or payout interval.
  4. Read the estimated interest and maturity amount.
  5. Compare the assumptions with the bank’s deposit terms.

Good to know

  • Tap the Help button beside a field for its range and meaning.
  • The rate is your input; this calculator does not fetch bank rates.
  • Taxes, premature-withdrawal rules and bank rounding are not calculated.

Change an input to compare an estimate. Nothing you enter is sent to a server.

Deposit amount

The one-time amount placed in the fixed deposit before interest.

How to fill it in

  • Enter a figure such as 500000, 5 lakh or 50 lakh.
  • Allowed range: ₹1,000 to ₹100 crore.

Example

A ₹5 lakh deposit is estimated to mature at about ₹7,07,389 under the default assumptions.

Annual interest rate

The yearly rate used to estimate interest on the deposit.

How to fill it in

  • Enter the rate quoted for the deposit, from 0% to 20% a year.
  • At the default amount and tenure, 7% with quarterly compounding gives about ₹2,07,389 in estimated interest.

Keep in mind: Rates can vary by bank, tenure, customer type and product. This input is not a rate offer.

Tenure

How long the deposit stays in this estimate before maturity.

How to fill it in

  • Choose a whole number of years from 1 to 20.

Tip: Actual banks may accept other tenures, including days or months.

Interest option

Interest option

Whether the estimate adds interest to the deposit or pays it out at intervals.

How to fill it in

  • Cumulative adds interest to the balance at each selected interval.
  • Interest payout keeps the deposit principal unchanged and estimates simple interest payments.

Keep in mind: Banks can calculate and credit interest differently. Check the deposit terms before comparing.

Compounding interval

Interest interval

How often interest is added to a cumulative deposit or paid out in the payout option.

How to fill it in

  • Choose monthly, quarterly, half-yearly or yearly.

Example

The default estimate uses quarterly intervals: 20 periods over 5 years.

Tip: Use the interval stated in the bank’s product terms.

Estimated maturity value

₹7,07,389

₹7.07 lakh

₹5,00,000 at an assumed 7% a year for 5 years could grow to about ₹7.07 lakh with quarterly compounding.

Deposit amount
₹5,00,000
Total estimated interest
₹2,07,389
Interest intervals
20

This estimate uses a constant rate and the selected interval. It does not include tax, fees, early-withdrawal adjustments or bank-specific rounding.

ChangelogHow we test this calculatorEmbed this calculator

How this calculator works

Cumulative interest is added to the deposit; payout interest is estimated separately while the original deposit stays unchanged.

  1. Step 1Start with the deposit₹5 lakhentered once
  2. Step 2Apply the rate each interval7% ÷ 4the selected nominal annual rate split into equal periods
  3. Step 3Estimate the maturity value₹7.07 lakhincluding about ₹2.07 lakh in interest

What the result leaves out

  • Tax and TDSTax deducted at source and your final tax position are not calculated.
  • Bank-specific termsFees, early-withdrawal adjustments, day counts and bank rounding are excluded.
  • Changing ratesThe entered rate stays constant for the full estimate; no bank rate is fetched.

Worked example

₹5 lakh for 5 years at an assumed 7% a year, compounded quarterly
Periodic rate
i = R ÷ m
Cumulative maturity
M = P × (1 + i)^(m × t)
Total interest
I = M − P
  • Pdeposit amount ₹5,00,000
  • Rannual rate 7%
  • mperiods per year 4
  • twhole years 5
  1. Rate per interval7% ÷ 41.75%
  2. Number of periods4 × 520
  3. Growth factor(1 + 0.0175)^201.414778
  4. Estimated maturity value₹5 lakh × growth factor₹7,07,389
  5. Estimated interestmaturity value − deposit₹2,07,389

The rate is divided by the number of intervals per year. Interest is then added to the balance at each interval. This is a mathematical illustration, not a bank quote.

Reading your result

  • Cumulativequarterly compounding₹7.07 lakhAbout ₹2.07 lakh interest remains in the deposit and compounds.
  • Interest payoutMonthly estimate₹2,917Estimated interest paid each month; the original ₹5 lakh principal remains at maturity.
The payout option uses simple interest and equal payments. Bank contracts can use different accrual, payment and rounding rules.
  • Assumed 5% a year₹6.41 lakh
  • Assumed 7% a year₹7.07 lakh
Same deposit, tenure and quarterly intervals. The rates are editable assumptions, not current offers.

For payout mode, the result separates the principal returned at maturity from the interest estimated across the term. The interval controls payment size, not total simple interest.

FD, RD or a post office scheme?

An FD takes one deposit; an RD takes the same amount every month. Post office schemes fix their own rates and terms.

If you plan to save a fixed sum each month instead, use the RD calculator. Government-backed alternatives with notified rates include the NSC calculator, the KVP calculator and, for seniors, the SCSS calculator.

Interest above inflation is what grows buying power. The inflation calculator shows how much a maturity amount buys in today’s money.

Common mistakes

  • Mistake: Entering a rate from a different tenure or customer category.

    Instead: Check the rate and conditions for the exact deposit you are comparing.

  • Mistake: Treating a payout estimate like cumulative compounding.

    Instead: Choose the interest option stated in the deposit terms.

  • Mistake: Reading the estimate as an after-tax amount.

    Instead: Check current tax guidance and your own tax position separately.

  • Mistake: Assuming every bank uses the selected interval and rounding.

    Instead: Compare the estimate with the bank’s own schedule and maturity illustration.

This calculator does not compare banks, recommend a product or account for your personal circumstances. Use the bank’s written terms for a decision.

Checking the method

A separate script recomputes every test case two ways, by formula and period by period, and they must agree to half a paisa.

Try other compounding patterns in the compound interest calculator, read how we test our calculators, or browse more money calculators.

Frequently asked questions

How is cumulative FD maturity estimated?

The calculator divides the entered annual rate by the selected number of periods, then compounds the balance each period. At the defaults, the estimated maturity is about ₹7.07 lakh before tax or bank-specific adjustments.

How is an interest payout different?

The payout option estimates simple interest separately and leaves the deposit principal unchanged. At the defaults with monthly payouts, the estimated payment is about ₹2,917 each month.

Does the interval change total interest in payout mode?

No. For a fixed principal, rate and whole-year tenure, changing payout frequency changes the estimated payment size, not the total simple interest.

Why might my bank show a different maturity amount?

Banks can use different rates, tenure conventions, day counts, compounding schedules and rounding. Compare the result with the exact deposit terms.

Does this calculator use current bank rates?

No. You enter the annual rate yourself. The calculator does not fetch or recommend rates from banks or other providers.

Does the result include TDS or income tax?

No. Tax deducted at source and final tax liability are not calculated. Check current Income Tax Department guidance and your circumstances.

Can I enter a tenure in months or days?

This version accepts whole years from 1 to 20. Actual deposit products may allow other tenures and calculate partial periods differently.

Are these estimates a bank offer?

No. The rate is an assumption you enter. At 5% instead of the default 7%, the same deposit estimate is about ₹6.41 lakh.

Sources and methodology

The formulas are standard time-value-of-money results. We check every figure against golden values worked out independently, by closed form and by month-by-month simulation; see the methodology.

Written and maintained by Nitin Raturi, a software engineer (about the author). Last reviewed 21 Oct 2026; next review due by . Found an error? Tell us.

Changelog

  • : Owner-reviewed on 21 Oct 2026 and registered at the owner's request; demand metrics remain unverified.

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