How to Use FD Calculator

Key Takeaways

For compound interest: A = P × (1 + r/n)^(n×t), where P is principal, r is annual rate, n is compounding frequency per year, and t is tenure in years

Interest is calculated and added to the principal every 3 months

Most banks offer 0

If FD interest exceeds ₹40,000 (₹50,000 for seniors) in a financial year, the bank deducts TDS at 10%

What is FD Calculator?

FD Calculator computes the maturity amount of a Fixed Deposit based on your principal, annual interest rate, tenure, and compounding frequency. It also shows total interest earned, with optional TDS deduction and a senior citizen rate toggle.

Most Indian bank FDs use quarterly compounding. The maturity amount from quarterly compounding is higher than simple interest because interest is reinvested every 3 months.

FD Compounding Modes

Monthly

Interest compounded every month — produces the highest maturity amount but less commonly offered.

Quarterly

Most common for Indian bank FDs. Interest compounded every 3 months.

Half-Yearly

Interest compounded every 6 months — common for some NBFCs and small finance banks.

Annual

Interest compounded once per year — same as the stated annual rate, no frequency advantage.

Enter principal

Type the amount you plan to deposit. Minimum is ₹1,000 for most bank FDs.

Set rate & tenure

Enter the annual interest rate offered by the bank and your investment tenure.

Choose frequency

Select monthly, quarterly, half-yearly, or annual compounding.

Toggle TDS

Enable TDS deduction to see post-tax maturity amount alongside the gross figure.

Read maturity

Total maturity amount, total interest earned, and year-by-year growth are all shown.

Understanding the Output

Field	Meaning
Principal	Amount deposited
Maturity Amount	Principal + total interest earned
Total Interest	Interest earned over the full tenure
Gross Maturity	Before TDS deduction
Net Maturity	After TDS at 10%

Tips & Common Mistakes

Compare banks side by side. Run the calculator twice — once with your current bank’s rate and once with the highest-rate option you’ve found. Even a 0.5% difference on ₹5 lakh over 3 years can mean ₹7,000+ in additional interest.

FD interest is fully taxable as income in the year it accrues, not just when you withdraw. Budget for the tax liability accordingly.

PPF Calculator — tax-free long-term savings
Loan Calculator — EMI and total interest
Compound Interest Calculator — general compound growth

Frequently Asked Questions

What is the FD interest calculation formula?

For compound interest: A = P × (1 + r/n)^(n×t), where P is principal, r is annual rate, n is compounding frequency per year, and t is tenure in years.

What does quarterly compounding mean?

Interest is calculated and added to the principal every 3 months. This is the most common compounding frequency for Indian bank FDs.

How much extra do senior citizens earn?

Most banks offer 0.25–0.50% higher interest rates for senior citizens (aged 60+). This can add thousands of rupees to the maturity amount over a 5-year tenure.

What is TDS on FD interest?

If FD interest exceeds ₹40,000 (₹50,000 for seniors) in a financial year, the bank deducts TDS at 10%. Submit Form 15G/15H to avoid TDS if you're below the taxable income threshold.

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