Free fixed deposit (FDR) calculator that works for any bank — FDR Calculator
Work out your fixed deposit maturity value and interest earned — instantly, for any principal, rate, tenure, and compounding frequency.
The tax your bank deducts from the interest at source. Enter 0 if none.
Maturity value is after tax. Tax is taken from the interest only, never from your deposit.
How FDR maturity value is calculated
With compound interest, your fixed deposit grows using: Maturity = P × (1 + r/(100×n))^(n×t), where P is your principal, r is the annual interest rate, n is how many times per year interest compounds, and t is the tenure in years. The more frequently it compounds, the higher your effective return for the same nominal rate.
With simple interest, it's just Maturity = P + (P × r × t) — interest is only ever calculated on your original principal, so it grows at a constant rate for the whole tenure.
If your bank deducts tax at source, it takes a percentage of the interest, not of your deposit. This calculator subtracts that tax from the total interest to show what you actually receive.
A worked example
Deposit ৳1,00,000 for 12 months at 9% a year, compounded quarterly: 1,00,000 × (1 + 9/(100×4))^(4×1) = ৳1,09,308 at maturity — ৳9,308 in interest. With simple interest the same deposit returns ৳1,09,000, so quarterly compounding earns you ৳308 more. If your bank deducts 10% tax at source, ৳931 of that interest goes in tax and you receive ৳1,08,377.
Stop recalculating this every renewal.
Add your FDR to Finox once — principal, rate, tenure, and payout schedule. It tracks the running value automatically, sits inside your net worth, and reminds you before it matures.
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Frequently asked questions
An FDR is a fixed deposit you open with a bank for a set tenure at a fixed interest rate. You deposit a lump sum once, and the bank pays it back with interest at maturity (or pays out interest periodically, depending on the account type).
Most banks use compound interest, applied at a fixed frequency (yearly, quarterly, or monthly). The more frequently interest compounds, the higher your effective return for the same nominal rate. Some accounts use simple interest instead — this calculator supports both.
Simple interest is calculated only on your original principal for the full tenure. Compound interest is recalculated each period on your principal plus interest already earned, so it grows faster — the difference becomes more noticeable over longer tenures and higher rates.
This calculator uses the standard compound-interest formula and gives a very close estimate. Individual banks may round differently, deduct tax each time interest is credited, or use slightly different day-count conventions, so treat the result as an estimate and confirm the exact figure with your bank.
It depends on your country. In Bangladesh, banks deduct tax at source from deposit interest: as of 2026, 10% for individuals, or 15% if you cannot show proof of a submitted tax return. It is a tax on the interest only — it is not VAT, and nothing is taken from your deposit. Rates can change with each budget, so confirm with your bank. Other charges, such as the yearly excise duty on the balance, are not included here.
Yes — add your FDR once (principal, rate, tenure, payout schedule) and Finox calculates the running value and maturity date automatically, and reminds you before it matures so you never miss a renewal decision.
Also saving in installments? Try the DPS calculator →