FD Calculator: Understanding Your Real Returns After Tax (2026)
Fixed Deposits are India's most popular savings instrument — virtually every bank account holder has at least one. But while the headline rate looks attractive, the real return after tax is what matters. This calculator shows you both numbers side by side, so you can make informed decisions about where to park your money.
The tax problem with FDs
Unlike PPF or ELSS, FD interest is fully taxable at your income tax slab rate. For someone in the 30% tax bracket (+ 4% cess), a 7% FD effectively returns only about 4.86%. This is often below the inflation rate, meaning your money loses purchasing power even while earning "safe" interest.
| FD Rate | After 0% tax | After 5% | After 20% | After 30% |
|---|---|---|---|---|
| 6.0% | 6.00% | 5.69% | 4.80% | 4.16% |
| 7.0% | 7.00% | 6.64% | 5.60% | 4.86% |
| 7.5% | 7.50% | 7.11% | 6.00% | 5.20% |
| 8.0% | 8.00% | 7.58% | 6.40% | 5.55% |
| PPF 7.1% | 7.10% (tax-free — same for all slabs) | |||
The last row is the key insight: PPF's 7.1% tax-free return beats every FD at every slab above 5%. Our calculator shows this comparison automatically.
How FD compounding works
Most banks compound FD interest quarterly. This means every 3 months, the accrued interest is added to your principal, and subsequent quarters earn interest on the increased amount. The compounding formula is:
Maturity = Principal × (1 + rate/n)n×years
where n is the number of compounding periods per year (4 for quarterly, 12 for monthly).
The difference between monthly and quarterly compounding is small but real: on ₹10 lakh at 7% for 5 years, monthly compounding yields about ₹1,200 more than quarterly. Always check your bank's compounding frequency in the FD terms.
TDS on FD interest
Banks deduct TDS (Tax Deducted at Source) at 10% if your total FD interest across all branches of that bank exceeds:
- ₹40,000 per year for general customers
- ₹50,000 per year for senior citizens (60+)
Important points about TDS on FDs:
- TDS is deducted on accrued interest, not just paid interest — even cumulative FDs have annual TDS
- If you don't provide PAN, TDS is deducted at 20% instead of 10%
- Submit Form 15G (or 15H for seniors) if your total income is below the basic exemption limit to avoid TDS
- TDS is just an advance tax payment — your actual tax liability depends on your total income and slab rate
- Check Form 26AS or AIS to verify TDS credit before filing your ITR
FD vs PPF: the real comparison
This is the most common investment dilemma for conservative investors. Here's the honest comparison:
- Returns: PPF wins on post-tax returns at any slab above 5%. Its 7.1% tax-free beats the effective yield of most FDs.
- Liquidity: FD wins. You can break an FD anytime (with a small penalty). PPF has a 15-year lock-in with partial withdrawal only from year 7.
- Flexibility: FDs offer tenures from 7 days to 10 years. PPF is fixed at 15 years minimum.
- Risk: Both are very safe. FDs up to ₹5 lakh are insured by DICGC. PPF is sovereign-guaranteed.
- 80C benefit: Only 5-year tax-saver FDs qualify for 80C. PPF always qualifies.
The practical approach: use PPF for long-term savings (retirement, children's education) and FDs for short-to-medium-term goals where you need liquidity.
Types of FDs to consider
- Regular FD: Standard cumulative or interest-payout FD. Most common.
- Tax-saving FD: 5-year lock-in, 80C deduction on principal (but interest is taxable).
- Flexi/Sweep-in FD: Linked to savings account, auto-breaks FD for withdrawals. Good for emergency funds.
- Corporate FD: Higher rates (8-9%) but higher risk. Not DICGC insured. Check credit rating (AAA/AA+ only).
- FD laddering: Split your corpus into multiple FDs with different maturities (1yr, 2yr, 3yr, 5yr). Provides liquidity + rate diversification.
Tips to maximise FD returns
- Compare rates across banks — small finance banks often offer 0.5-1% more than large banks
- Check if your bank offers higher rates for online FD booking
- Use FD laddering to balance liquidity and returns
- Submit Form 15G/15H promptly to avoid unnecessary TDS
- For amounts above ₹5 lakh, spread across banks for full DICGC insurance coverage
- Consider the new tax regime — if you're not claiming 80C, tax-saver FDs lose their advantage