The Public Provident Fund (PPF) remains a cornerstone of the Indian debt portfolio in 2026. Offering a secure 7.1% interest rate with sovereign guarantee, it is the safest long-term investment for a 15-year horizon. Whether you are comparing PPF vs SSY or planning your retirement, this calculator accounts for yearly compounding and the ₹1.5 Lakh Section 80C limit. For a ₹1,00,000 investment, your total maturity amount is tax-free, protecting your wealth from inflation.
How PPF Interest is Calculated — Year-by-Year
PPF interest is calculated on the minimum balance between the 5th and last day of each month and credited annually on March 31st. This means you should deposit before the 5th of each month to earn interest for that month. The formula compounds your deposits annually over 15 years.
F = P × [((1 + i)ⁿ - 1) / i]Where:
- • F = Maturity Amount at end of tenure
- • P = Annual deposit amount (max ₹1,50,000)
- • i = Annual interest rate ÷ 100 (currently 7.1% → 0.071)
- • n = Number of years (minimum 15)
- • Example: ₹1.5L/year for 15 yrs @ 7.1% → Maturity = ₹40,68,209
- Year-by-Year Growth (₹1.5L/year @ 7.1%): Year 1: ₹1,60,650 | Year 5: ₹9,13,847 | Year 10: ₹21,95,337 | Year 15: ₹40,68,209. Your money nearly doubles from Year 10 to Year 15 due to compounding!
- Deposit Tip: Deposit before April 5th each year to earn interest for the full year. A yearly deposit of ₹1.5L vs monthly deposits of ₹12,500 gives slightly higher returns when invested as lump sum early in April.
- PPF Interest Rate History: The rate is set by the government quarterly. It was 8.7% (2016), 7.9% (2020), 7.1% (2020–present). Historically between 6.5–12% — still attractive for risk-free, tax-free returns.
- EEE Status Explained: E1 — Investment up to ₹1.5L deductible under Section 80C. E2 — Annual interest earned is NOT taxed. E3 — Maturity amount (₹40.68L in above example) is completely tax-free. No other instrument offers all three.
Example: ₹1.5 Lakh/Year PPF for 15 Years
Rohan opens a PPF account at age 30 and deposits the maximum ₹1,50,000 per year for 15 years at 7.1% interest.
• Total Amount Invested: ₹22,50,000
• Total Interest Earned: ₹18,18,209 (completely tax-free!)
• Maturity Value at Age 45: ₹40,68,209
If Rohan extends for 5 more years (to age 50): Maturity jumps to ₹66,58,288 — adding ₹7.5L more in deposits but getting ₹25.9L more in returns due to compounding!
PPF vs Other Tax-Saving Investments (Section 80C)
Compare PPF with popular 80C tax-saving instruments:
| Feature | PPF | ELSS Mutual Fund | Tax-Saving FD | NPS (Tier 1) |
|---|---|---|---|---|
| Lock-in Period | 15 Years | 3 Years | 5 Years | Till age 60 |
| Returns (Approx) | 7.1% Guaranteed | 12-16% (Market) | 6.5-7% | 9-12% (Market) |
| Tax on Returns | Fully Tax-Free (EEE) | 10% LTCG above ₹1.25L | Taxable as slab | Partial tax on withdrawal |
| Risk | Zero (Govt. backed) | High (equity) | Zero (DICGC insured) | Medium (mixed) |
| Loan Facility | Yes (3rd to 6th yr) | No | Yes (OD at bank) | No |
Frequently Asked Questions
⚠️ Disclaimer
The figures provided by this calculator are estimates based on the inputs you provide and standard financial formulas. STOCKCALC.IN does not offer investment advice. Please consult a qualified financial advisor before making any investment decisions.