FD Calculator
Work out exactly what your fixed deposit will be worth at maturity — and how much of it is pure interest.
How to use this FD calculator
Pick your currency, then enter the deposit amount you plan to lock in, the annual interest rate your bank is offering and the tenure in years. Choose how often interest is compounded — most Indian banks compound fixed deposits quarterly, so that is the default, but you can switch to monthly, half-yearly or yearly to match your bank's terms. The maturity value, principal and total interest earned update instantly as you change any input or drag a slider.
How this is calculated
We use the standard compound-interest formula for a lump-sum fixed deposit: Maturity = P × (1 + r/n)n×t, where P is your deposit, r is the annual rate as a decimal, n is the number of compounding periods per year and t is the tenure in years. The interest earned is simply the maturity value minus your original principal. Because compounding happens several times a year, your effective return is slightly higher than the headline rate — and the more frequently interest compounds, the larger your maturity value.
Educational estimate, not financial advice — see our disclaimer.
A worked example
Suppose you deposit ₹1,00,000 for 5 years at 7% per year, compounded quarterly. Here n = 4 and t = 5, so the exponent is 20 and the quarterly rate is 1.75%. The maturity value works out to roughly ₹1,41,478, meaning you earn about ₹41,478 in interest on top of your principal. Switch the compounding to yearly and the same deposit matures at around ₹1,40,255 — a small but real difference that shows why compounding frequency matters.
Things to keep in mind
- Tax — interest on a fixed deposit is generally taxable as income, and banks may deduct TDS once interest crosses a threshold. This calculator shows the gross maturity value before any tax, so your in-hand return may be lower.
- Premature withdrawal — breaking an FD early usually means a penalty and a lower rate, so the figures here assume you hold to maturity.
- Rate shopping — even a 0.5% higher rate compounds into a meaningfully larger payout over several years, so it pays to compare banks.
- Senior citizens — many banks offer a small rate bonus for senior citizens; enter that higher rate to see the effect.
FD, RD or savings?
A fixed deposit suits a lump sum you can lock away. If instead you want to invest a fixed amount every month, a recurring deposit fits better — try our RD calculator. If you are comparing certificates of deposit or term-deposit style products, our CD calculator uses the same compounding maths. A plain savings account stays fully liquid but typically pays far less interest than an FD of the same tenure.