FD Maturity Calculator (India) — Quarterly, Monthly, Yearly Compounding

Compounding Frequency Changes Your Maturity Amount

Your FD's compounding frequency—how often interest is calculated and added to your principal—directly affects how much you earn. Indian banks typically compound quarterly, but some offer monthly or annual options, and the difference is concrete.

Take ₹1,00,000 invested at 7% annual interest for five years:

• Compounded quarterly (4 times per year): ₹1,41,478
• Compounded annually (once per year): ₹1,40,255

That ₹1,223 difference comes purely from compounding four times instead of once. The formula is M = P × (1 + r/n)^(n×t), where n is the number of compounding periods per year. Quarterly is the standard for Indian FDs for a reason: it compounds your returns more frequently, and the effect compounds over years.

Your Effective Return Is Higher Than the Advertised Rate

When a bank quotes a 7% rate, that's the nominal rate. The true annual return—your effective yield—is slightly higher because of compounding. For quarterly compounding, (1 + 0.07÷4)^4 − 1 = 0.0719, or about 7.19% effective yield.

This gap grows with shorter compounding intervals. It's why banks advertise the nominal rate: it's the smaller number. Your calculator shows both perspectives to make the true return clear.

Tax Is Where Your FD Returns Actually Go

FD interest is fully taxable at your income-tax slab rate. You do not pay tax only at maturity; interest is taxed on accrual each year as it's credited. If your slab is 30%, a 7% FD return effectively becomes 4.9% after tax.

Tax Deducted at Source (TDS) kicks in once annual interest crosses the prescribed threshold, which is revised periodically, so check the figure for the current year. A depositor whose total income falls below the taxable limit can file Form 15G, or Form 15H if a senior citizen, to have no TDS deducted at all. But TDS is rarely the full tax you owe: if your slab rate exceeds the TDS rate, you pay the difference at filing. For high earners, this can be significant. Rates vary by bank and tenure—confirm with yours before investing. Also compare this with other tax-advantaged tools like PPF and compound interest strategies.

Tax-Saving FDs: The Section 80C Benefit and Its Limits

A five-year tax-saving FD qualifies for a Section 80C deduction up to ₹1.5 lakh, meaning that amount reduces your taxable income for the year you deposit it. This is a deduction on the principal you invest, not on the interest you earn.

The trade-offs are strict: your money is locked for the full five years with no premature withdrawal, no loans against it, and no flexibility. The interest remains fully taxable at your slab rate. The tax-saving benefit is real and valuable for your deposit, but only if you can afford the lockup. Compare this structure with an RD to see which locked-in vehicle suits your goals.