FD Calculator - Fixed Deposit Interest & Maturity Calculator

What is an FD Calculator?

A Fixed Deposit (FD) calculator is a tool designed to calculate the maturity amount and interest earned on money deposited in a fixed deposit scheme. Fixed deposits are popular investment choices because they offer low risk and guaranteed returns compared to market-linked instruments.

How Compounding Frequency Affects FD Returns

The frequency at which interest compounds plays a vital role in determining your final maturity amount:

Quarterly Compounding: Interest is calculated every 3 months. This is the industry standard for fixed deposits.
Monthly Compounding: Ideal for investors seeking monthly income payouts or higher effective annual yields.
Yearly Compounding: Interest is added to the principal once every 12 months.

Benefits of Using an FD Calculator

Instant Accuracy: Eliminates manual compounding errors.
Comparison: Easily compare different interest rates and tenures across banks.
Financial Planning: Plan long-term savings goals like home down payments, education funds, or emergency reserves.

How to use

Enter your initial deposit amount in your currency.

Input the annual interest rate offered by your bank or financial institution.

Select the tenure in years or fractional years.

Choose the compounding frequency (quarterly is standard for most bank FDs).

Review the maturity amount and interest earned instantly.

Formula

Fixed deposit returns depend on the principal, interest rate, duration, and how frequently interest compounds.

Compound Interest FD FormulaA = P × (1 + r / n)^(n × t)A = maturity amount, P = deposit amount, r = annual interest rate, n = compounding frequency per year, t = tenure in years.

Total Interest EarnedI = A − PI = total interest earned over the deposit tenure.

Worked examples

$10,000 FD at 7% p.a. for 5 years (Quarterly Compounding)

Depositing $10,000 at 7% p.a. compounded quarterly yields a maturity value of approximately $14,147.78, generating $4,147.78 in total interest.

$50,000 FD at 6.5% p.a. for 3 years (Monthly Compounding)

With a $50,000 deposit at 6.5% compounded monthly, your investment grows to $60,733.64 after 3 years.

Frequently asked questions

What is a Fixed Deposit (FD)?

A Fixed Deposit is a financial instrument provided by banks and NBFCs where investors deposit a sum of money for a fixed tenure at a predetermined interest rate.

How is FD interest calculated?

FD interest is calculated using the compound interest formula A = P(1 + r/n)^(nt), where compounding typically occurs quarterly, monthly, half-yearly, or annually.

What is the standard compounding frequency for FDs?

Most banks compound FD interest on a quarterly basis, although some offer monthly interest payout options or annual compounding.

Is FD interest taxable?

Yes, interest earned on fixed deposits is generally subject to income tax according to your country's tax laws and income bracket.