FD Calculator – Fixed Deposit Maturity Amount

What your result means

The maturity amount is what the bank pays you at the end of the tenure: your deposit plus all the interest. Interest earned is the difference, and the donut shows what share of the final amount is interest. Effective annual yield converts the quoted rate and compounding into a single yearly growth rate, which is the fair way to compare two deposits with different compounding.

The balance over time chart shows the deposit growing year by year. With compounding, each year’s interest is slightly larger than the last because it is earned on the previous interest as well.

How to use this FD calculator

1. Enter the deposit amount you plan to place.
2. Enter the interest rate per year from your bank’s or post office’s rate card for that tenure.
3. Enter the tenure in years and months (for example 1 year 6 months).
4. Choose the compounding your deposit uses (quarterly for most banks) and whether interest is reinvested or paid out.
5. Read the maturity amount instantly and compare offers by changing the rate or tenure.

Formula and worked example

Cumulative FD:   A = P × (1 + r/n)^(n × t)
Interest payout: A = P + P × r × t
P = deposit, r = annual rate ÷ 100, n = compounding periods per year, t = years

Worked example (computed by this tool’s own function): ₹1,00,000 at 7% for 1 year, quarterly compounding.

• Quarterly rate = 7 ÷ 4 = 1.75%, periods = 4
• A = 1,00,000 × (1.0175)^4 = ₹1,07,185.90
• Interest = ₹7,185.90; effective yield = 7.19%

The same deposit with interest paid out (no compounding) earns ₹7,000.

Effect of compounding on ₹1,00,000 at 7% for 1 year

| monthly | ₹1,07,229.01 | 7.23% | | quarterly | ₹1,07,185.90 | 7.19% | | half-yearly | ₹1,07,122.50 | 7.12% | | yearly | ₹1,07,000.00 | 7% |

FD reference table (quarterly compounding)

All figures are produced by the same function that powers the calculator above.

Special cases and common mistakes

• Bank rounding and day counts. Banks may compute interest on actual days (365/366) and round each quarter, so their figure can differ from this calculator by a few rupees.
• Partial quarters. For tenures that are not whole quarters (for example 15 months), interest for the broken period is usually simple interest for those days; this calculator compounds it pro-rata, which gives a very close but not identical answer.
• Senior citizen rates. Banks typically offer a higher rate to senior citizens; enter the rate that applies to you.
• TDS. Tax is deducted at source once interest crosses the threshold in force for the year; the maturity you receive may be lower than shown unless Form 15G/15H applies.
• Auto-renewal. If the FD renews at maturity, the new rate is the one prevailing at renewal, not the original rate.
• Deposit insurance. Bank deposits are insured by DICGC up to the limit in force per depositor per bank; this is independent of the calculation.