Fixed Deposit Calculator

See a lump-sum deposit's maturity amount, interest, effective yield and date at a nominal annual rate, compounded monthly, quarterly, half-yearly or annually.

All calculations happen locally in your browser. Nothing you type ever leaves your device.

Amount at maturity
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Interest earned
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Effective annual yield
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Maturity date
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Interest figures are pre-tax — many jurisdictions tax deposit interest, so your take-home return may be lower.

Withdrawing early usually reduces or forfeits the accrued interest, and penalty terms vary by bank. Estimates only — not financial advice.

The currency selector only changes the display symbol — no exchange-rate conversion is applied. To convert an amount, use the currency converter.

How It Works

A fixed deposit pays a nominal annual rate that is credited — and reinvested — a fixed number of times per year. Each credit adds to the balance, so later periods earn interest on earlier interest. The formula is the standard compound-growth equation: A = P × (1 + r/n)n×t, where P is the deposit, r the annual rate as a decimal, n the credits per year, and t the term in years (months ÷ 12).

Compounding periods
The same nominal rate produces different payouts depending on how often it is credited. For a deposit of 10,000 at 5% nominal over exactly one year, the maturity amount and the true annual yield look like this:
FrequencyCredits/year (n)Amount after 1 yrEffective yield
Monthly1210,511.625.116%
Quarterly410,509.455.095%
Half-yearly210,506.255.063%
Annual110,500.005.000%
Nominal rate vs APY
Banks advertise the nominal rate, but what you actually earn over a year is the annual percentage yield. A 4% nominal rate credited monthly is (1 + 0.04/12)12 − 1 ≈ 4.074% APY; credited annually it is exactly 4%. The gap grows with the rate and the frequency, but it is always small at deposit-like rates — the "Effective annual yield" card above shows it for your inputs.
Terms that are not whole years
For a 9-month deposit at monthly compounding, the exponent n×t is not an integer, and this calculator (like most bank quote tools) uses the continuous formula with t = 9/12 rather than rounding period-by-period. Real banks sometimes apply simple interest inside the final period, so small differences against your statement are normal.

Frequently Asked Questions

Is my money safe in a fixed deposit?

Fixed deposits are low-risk in the sense that the return is agreed in advance, but no deposit is risk-free: the bank itself must stay solvent. Many countries operate deposit-guarantee schemes that reimburse depositors up to a per-bank, per-person limit — the coverage and the limit differ wherever you live, so check your own scheme rather than assuming this one applies to you.

What if inflation is higher than my deposit rate?

Then your money grows in nominal terms but loses purchasing power. A 3% deposit against 4% inflation is a real return of about −1% per year, and tax on the interest usually widens the gap. Comparing the rate with expected inflation is the honest test of whether locking money away is worth it.

What is a deposit ladder?

Instead of locking everything for one long term, you split the sum across staggered maturities — for example six months, one year and two years. As each deposit matures you reinvest it at the short end, so you keep periodic access to cash and can capture rising rates, at the cost of a slightly lower average rate than the longest term usually pays.

What happens if I withdraw before maturity?

Most banks reduce or forfeit the accrued interest on early withdrawal, and some charge an explicit penalty. The exact terms vary by bank, currency and even branch, so read the offer before committing — this calculator assumes you hold to maturity.

Is anything uploaded to a server?

No. The compounding math, the yield figure and the maturity date are all computed locally in your browser with plain JavaScript. Your deposit amount and rate never leave your device, and there is no account and no network request attached to a calculation.