Overview
Enter an annual contribution amount, an annual interest rate, and a tenure in years to calculate the maturity value of a Public Provident Fund (PPF) account - a long-term, government-backed savings scheme built around fixed annual (not arbitrary-frequency) deposits. This calculator explicitly assumes each year's contribution is deposited at the BEGINNING of that year (an annuity-due), which is the standard real-world PPF convention, since a deposit made early in the financial year earns a full year of interest rather than none: FV = C × (((1+r)^n − 1) ÷ r) × (1 + r). This differs from the Future Value Calculator's periodic-contribution mode, which models END-of-period (ordinary annuity) deposits at any frequency you choose - PPF's annual, beginning-of-year deposit structure is a distinct, well-known workflow of its own. The interest rate is a fully editable input with a labeled example default, not a hardcoded "current" rate, since PPF rates are set quarterly by the relevant government authority and change over time. Runs entirely client-side, and this is an informational estimate, not financial advice.
Best for: Estimating the maturity value of a long-term PPF account from yearly contributions
How to use this tool
- Enter the annual contribution. The amount deposited once per year, assumed to land at the beginning of each year.
- Enter the interest rate and tenure. The annual interest rate (editable - not a hardcoded "current" rate) and the number of years.
- Read the maturity value. Total contributed, total interest earned, and the final maturity value.
Frequently asked questions
Beginning of each year (an annuity-due) - the standard real-world PPF convention, since a deposit made early in the financial year earns a full year's interest. This is explicitly documented rather than left ambiguous, and it's why the formula includes an extra × (1 + r) factor compared to a plain end-of-period annuity.
The Future Value Calculator's contribution mode assumes deposits land at the END of each compounding period (an ordinary annuity) and supports arbitrary frequencies (monthly, quarterly, etc.). PPF is specifically an annual, beginning-of-year deposit scheme, so this calculator models that exact convention rather than the more general, but timing-different, ordinary-annuity math.
No - it's a labeled example only. PPF interest rates are set quarterly by the relevant government authority and change over time, so always enter the actual current rate rather than relying on this calculator's default.