Fixed Deposit Calculator
Calculate your FD maturity amount, total interest earned, and effective annual yield.
For educational purposes only. This calculator does not provide financial advice. Actual FD rates and terms vary by bank and may change over time.
📊 Visual Analysis
What This Calculator Does
The Fixed Deposit Calculator computes the maturity amount and total interest earned on a fixed deposit using compound interest. Enter the deposit amount, annual interest rate, tenure, and compounding frequency to see the maturity value, interest earned, and effective annual yield.
Formula
Where:
- A = Maturity amount (principal + interest)
- P = Principal (initial deposit amount)
- r = Annual interest rate (as a decimal, e.g., 7% = 0.07)
- n = Compounding frequency per year (monthly=12, quarterly=4, half-yearly=2, annually=1)
- t = Tenure in years
The effective annual yield is calculated as: (A/P)^(1/t) − 1. This shows the equivalent annual rate you actually earn, which is slightly higher than the quoted rate due to compounding.
Input Fields Explained
Deposit Amount ($)
The lump sum amount you plan to deposit. This is the principal that will earn interest over the FD tenure. Different banks have different minimum deposit requirements.
Annual Interest Rate (%)
The interest rate offered by the bank or financial institution, expressed as a yearly percentage. Enter the rate quoted by your bank.
Deposit Tenure + Tenure Unit
The duration for which you want to keep the deposit. Enter in years or months. Longer tenures often offer higher rates but lock your money for longer.
Compounding Frequency
How often the interest is calculated and added to your principal. Options: quarterly (most common), monthly, half-yearly, or annually. More frequent compounding produces slightly higher returns.
Example Calculation
You deposit $100,000 at 7.5% annual interest for 5 years with quarterly compounding.
r = 0.075, n = 4 (quarterly), t = 5
A = 100,000 × (1 + 0.075/4)20
A ≈ $145,197
Total interest = $145,197 − $100,000 = $45,197
Effective annual yield ≈ 7.71%
Assumptions: Fixed rate for the entire tenure, no premature withdrawal, no taxes. Actual returns vary by bank.
How to Read the Result
The total amount you receive at the end of the FD tenure (principal + accumulated interest).
The interest component of your maturity amount. This is the gross return before taxes.
The actual annual rate you earn after accounting for compounding. Slightly higher than the quoted rate, useful for comparing FDs with different compounding frequencies.
Common Mistakes
- Confusing nominal and effective rates. The quoted rate is nominal. Due to compounding, the effective yield is slightly higher. Use effective yield when comparing FDs.
- Ignoring premature withdrawal penalties. Breaking an FD early usually means earning a lower rate. This calculator assumes the deposit runs to maturity.
- Not considering inflation. FD returns are nominal. If inflation exceeds your FD rate, you lose purchasing power in real terms.
- Forgetting taxes on interest. FD interest is generally taxable income. Your after-tax return may be significantly lower than the gross rate.
- Assuming rates stay constant. FD rates at booking are locked in, but renewal rates may differ from your existing FD rate.
When This Calculator Is Useful
- Comparing FD offers from different banks
- Deciding between different tenures or compounding options
- Planning maturity proceeds for a financial goal
- Understanding the effective yield vs quoted rate
- Estimating interest income for tax planning
Limitations
- Assumes a fixed interest rate for the entire tenure
- Does not account for premature withdrawal penalties
- Does not deduct taxes on interest income
- Does not consider inflation or purchasing power
- Does not model flexible or sweep-in FD products
- This calculator is for educational purposes only and does not constitute financial advice
Frequently Asked Questions
What is a Fixed Deposit?
A Fixed Deposit (FD) is a financial instrument where you deposit a lump sum with a bank or financial institution for a fixed period at a predetermined interest rate. The deposit earns compound interest over the tenure, and you receive the principal plus interest at maturity. FDs are generally considered lower risk than market-linked investments, but they are subject to bank credit risk.
How is FD interest calculated?
FD interest is calculated using the compound interest formula: A = P × (1 + r/n)^(n×t), where P is the principal, r is the annual interest rate, n is the compounding frequency per year, and t is the tenure in years. Higher compounding frequency (e.g., monthly vs annually) results in slightly higher returns due to more frequent compounding.
What compounding frequency should I choose?
This depends on what your bank offers. Most banks compound quarterly, but some offer monthly, half-yearly, or annual compounding. More frequent compounding yields slightly higher returns. For example, a $100,000 FD at 7% for 5 years yields slightly more with quarterly compounding than with annual compounding.
Can I withdraw my FD before maturity?
Most FDs allow premature withdrawal, usually with a penalty (often a reduced interest rate). Some banks may not allow partial withdrawals. This calculator assumes you hold the FD to maturity — if you need liquidity, consider a sweep-in FD or a shorter tenure instead.
Are FD returns taxable?
Yes, in most countries FD interest is taxable as income. The calculator shows gross returns before taxes. Your actual post-tax return depends on your income tax bracket. Some countries offer tax-saving FDs with specific lock-in periods and deduction benefits — check local tax rules.
Does this calculator account for inflation?
No. The results are in nominal terms. If inflation averages 3-4% during your FD tenure, the real (purchasing-power-adjusted) return will be lower than the nominal rate shown. To estimate real return, subtract the expected inflation rate from the FD interest rate.
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Educational Disclaimer
This calculator is for educational and informational purposes only. It does not provide investment, financial, tax, or legal advice. The results are based on the inputs and assumptions you provide and may not reflect real market conditions, fees, taxes, or risks. Always do your own research or consult a qualified professional before making financial decisions.