What is the PPF Calculator?
The Public Provident Fund is India’s most popular sovereign-backed small savings scheme: a 15-year account with government-set interest (currently 7.1%), an annual deposit limit of ₹1.5 lakh, and the rare EEE tax status — deductible deposits, tax-free interest, tax-free maturity.
This calculator is for long-term conservative investors, tax planners maximising 80C, parents building a tax-free corpus for a child, and anyone seeking the debt anchor of a retirement portfolio. PPF’s superpower is not its rate but its tax treatment and compounding runway.
A 7.1% tax-free return equals a ~10.1% pre-tax return for someone in the 30% bracket — beating most FDs decisively. After the initial 15 years, the account extends indefinitely in 5-year blocks, with or without fresh deposits, and the calculator models those extensions. Deposit timing matters: interest is calculated on the lowest balance between the 5th and end of each month, so deposit before the 5th.
PPF accumulation formula
Balanceᵧ = (Balanceᵧ₋₁ + D) × (1 + r)
| Symbol | Meaning |
|---|---|
| D | Annual deposit (max ₹1.5 lakh), assumed at the start of the year |
| r | Government-notified annual interest rate |
| y | Year of the scheme (15-year term, extendable in 5-year blocks) |
Worked example
Depositing the maximum ₹1.5 lakh every April for 15 years at 7.1%: total deposits ₹22.5 lakh, maturity ≈ ₹40.7 lakh — entirely tax-free. Extend twice (25 years total) and the corpus crosses ₹1 crore.
| Duration | Deposits | Maturity (tax-free) |
|---|---|---|
| 15 years | ₹22.5 L | ≈ ₹40.7 L |
| 20 years | ₹30.0 L | ≈ ₹66.6 L |
| 25 years | ₹37.5 L | ≈ ₹1.03 Cr |
Benefits of the PPF Calculator
EEE tax status — rare triple exemption
Deposits get 80C deduction, interest is tax-free, and maturity is tax-free — one of the few genuine EEE instruments in India.
Sovereign guarantee on principal and interest
Backed by the Government of India, PPF carries zero credit risk — the safest long-term debt instrument available.
Effective pre-tax equivalent of ~10% for high earners
A 7.1% tax-free return equals ~10.1% pre-tax in the 30% bracket, beating most FDs and many debt funds.
Extensions allow 25–50 year tax-free compounding
After 15 years you can extend in 5-year blocks indefinitely, creating a multi-decade tax-free compounding runway.
Partial withdrawals and loans available
From year 7 you can withdraw partially; loans against PPF are available in years 3–6, adding limited liquidity.
Limitations to keep in mind
15-year lock-in with limited partial access
Money is locked for 15 years; partial withdrawals only from year 7 and capped — PPF is not for short goals.
₹1.5 lakh annual deposit cap
You cannot invest more than ₹1.5 lakh per year regardless of surplus, limiting PPF’s role in large portfolios.
Rates reset quarterly by the government
The 7.1% rate is not guaranteed for the full tenure; the government revises small-savings rates every quarter.
Returns unlikely to beat equity over long horizons
PPF preserves capital tax-free but grows slower than equity; it is the debt anchor, not the growth engine.
NRIs cannot open new accounts
Only residents can open PPF; existing accounts held before becoming NRI can continue but not extend.
Common mistakes to avoid
Depositing after the 5th of the month
You lose that month’s interest on the deposit — always fund before the 5th, ideally a lump sum in April.
Treating PPF as liquid
Partial withdrawals start only from year 7 and are capped; premature closure is heavily restricted.
Ignoring the ₹1.5 lakh annual cap
Excess deposits earn no interest and get no 80C benefit — track your yearly contributions.
Letting the account lapse after maturity
Extension-with-contribution must be filed (Form H) within one year of maturity; missing it forfeits fresh contributions.
Not extending to maximise compounding
Withdrawing at 15 years stops the tax-free runway; extending even without contributions keeps the balance earning.
Expert tips for better results
Deposit the full ₹1.5 lakh in April
A lump sum on April 1 earns interest for all 12 months, beating monthly deposits by a small but compounding margin.
Always deposit before the 5th
Interest is computed on the lowest balance between the 5th and month-end, so late deposits lose that month’s interest.
Extend with contributions after 15 years
Filing Form H within a year of maturity lets you keep contributing and compounding tax-free for another 5 years.
Use PPF as the debt anchor, not the whole portfolio
Pair PPF’s tax-free stability with equity SIPs for growth — PPF alone will not build a large retirement corpus.
Open one for each child early
A PPF opened at birth and extended can fund education or a house deposit tax-free by their mid-20s.
When to use this calculator
- The debt anchor of a retirement portfolio
- Tax-free corpus for a child born today
- 80C deduction with zero market risk
- Long-term capital preservation for conservative investors
Frequently asked questions
Sources & references
- Government of India — Public Provident Fund Scheme rules
- Ministry of Finance — quarterly small savings interest rate notifications
- Income Tax Department — Section 80C deductions
- WealthRise Methodology page — PPF annual compounding convention