Seeing an exact quote
This model is intentionally simplified.
Long-term savings • Simplified annual model
PPF Calculator
Estimate annual contributions, interest and maturity using a rate supplied by you. This is deliberately a simplified planning model—not an exact government account statement.
Enter projection assumptions
Verify current permitted limits separately.
Check the current notified rate before using it.
Methodology and prominent limitation
Simplified method: one full annual contribution is added at the beginning of each projection year, then annual interest is credited to the entire modelled balance. Actual PPF interest methodology and eligible balance timing can differ. Do not treat this as an exact official maturity quote.
Balance after year y = (Previous balance + Annual contribution) × (1 + rate)
The annual loop repeats for the entered whole-number years. Total contribution is annual contribution multiplied by years. Estimated interest is maturity minus contributions. Results are rounded to whole rupees.
Worked example
Using ₹1,50,000 at the beginning of each year for 15 years and an illustrative constant 7.1% rate:
| Total contribution | ₹22,50,000 |
|---|---|
| Estimated interest | ₹18,18,209 |
| Estimated maturity | ₹40,68,209 |
This result belongs only to the simplified timing convention. The input rate is illustrative and must not be read as a promise of the current or future PPF rate.
What to verify officially
- Current notified interest rate.
- Permitted contribution range and deposit timing.
- Original tenure and extension processes.
- Loan, partial-withdrawal and closure conditions.
- Current tax treatment.
The official rate can change by notification. The calculator intentionally keeps the rate editable rather than encoding a permanent value.
Practical planning tips
- Use only a contribution affordable every year.
- Keep emergency money accessible elsewhere.
- Compare long-term lock-in with your goal date.
- Update the rate assumption when official rates change.
- Retain account records and nomination details.
Common mistakes
Freezing today's rate
A constant rate may not persist for the full period.
Ignoring timing
Contribution dates can affect actual interest.
Skipping rule checks
Limits and access rules must be verified officially.
Related resources
Frequently asked questions
Is this the official exact method?
No, it is simplified.
Is the rate hardcoded?
No. You enter it.
Why does timing matter?
Actual eligible balances depend on contribution timing.
Are statutory limits enforced?
No; verify current rules.
Are extension and withdrawal rules modelled?
No.
Is tax treatment calculated?
No.
Can the rate change by year?
This version uses one constant rate.
Where should I verify information?
Current Government of India or authorized provider sources.
Educational disclaimer
This simplified calculator is not an official PPF statement, financial advice or tax advice. Verify current rates and scheme rules through authoritative Government of India information.