Fixed Deposit Calculator
Calculate your Fixed Deposit maturity value with different compounding frequencies.
Compare quarterly, monthly, and annual compounding returns.
A Fixed Deposit (FD) — called a Certificate of Deposit (CD) in the U.S. — is a savings instrument where you deposit a lump sum for a fixed term at a guaranteed interest rate. At maturity, you receive your principal plus the accumulated interest.
Formulas:
Simple Interest FD: Maturity Amount = Principal × (1 + Rate × Time) Interest Earned = Principal × Rate × Time
Compound Interest FD (most common): Maturity Amount = Principal × (1 + Rate/n)^(n × t) Interest Earned = Maturity Amount − Principal
What each variable means:
- Principal (P): the amount deposited at the start.
- Rate (r): annual interest rate as a decimal (e.g., 6.5% = 0.065).
- Time (t): investment period in years.
- n: compounding frequency per year (1 = annually, 4 = quarterly, 12 = monthly, 365 = daily).
Compounding frequency effect on $10,000 at 5% for 3 years:
- Annual: $11,576.25
- Quarterly: $11,607.55
- Monthly: $11,614.72
- Daily: $11,618.22
Worked example: Deposit ₹1,00,000 in a bank FD at 7.5% per annum, compounded quarterly, for 2 years.
n = 4, t = 2, r = 0.075 Maturity = 1,00,000 × (1 + 0.075/4)^(4×2) = 1,00,000 × (1.01875)^8 = 1,00,000 × 1.16057 = ₹1,16,057
Interest Earned = ₹16,057
Tax note: In India, TDS of 10% is deducted if interest exceeds ₹40,000/year. In the U.S., CD interest is fully taxable as ordinary income in the year earned (even if not withdrawn).
How we build and check this calculator
This calculator runs entirely in your browser, so the numbers you enter stay on your device. The math behind it is written by hand and tested against worked examples and standard references before the page goes live.
SuperGlobalCalculator is independently built and maintained. See how we build and verify our calculators.