PPF calculator: ₹1,000, ₹5,000 or ₹10,000 monthly investment can build this corpus in 15 years

PPF investment calculator: See how ₹1,000, ₹5,000 and ₹10,000 monthly investments could grow over 15 years at 7.1%. Check the PPF returns, tax benefits, contribution limits and long-term savings. 

Shivam Shukla
Published24 Aug 2026, 02:23 PM IST
An investor should calculate monthly PPF investments, understand the scheme’s rules and regulations, and assess its long-term savings potential, returns and tax benefits before investing. Seek professional guidance in case of doubts.
An investor should calculate monthly PPF investments, understand the scheme’s rules and regulations, and assess its long-term savings potential, returns and tax benefits before investing. Seek professional guidance in case of doubts.

The Public Provident Fund (PPF) is a savings option for investors seeking government-backed, tax-efficient returns. The most important question remains: How much can regular monthly contributions in PPF grow over 15 years? Can even modest monthly investments at the current PPF interest rate of 7.1% build a meaningful corpus over time?

For example, investing ₹1,000 a month over a 15-year horizon can grow to about ₹3.25 lakh, whereas a ₹5,000 monthly contribution can grow to about ₹16.27 lakh. This is based on the assumption that the interest rates remain unchanged throughout the investment period.

PPF rate currently at 7.1%

The government has retained 7.1% interest rate for PPF investments for the July-September 2026 quarter. PPF rates, along with those of other small savings schemes, are reviewed periodically; therefore, investors should not assume the same rate will apply to new PPF investments over the 15 years.

Also Read | SSY vs PPF: Compare returns, tax benefits and more

Growth of monthly PPF contributions

For investments of ₹1,000, ₹5,000 and ₹10,000, assuming a constant rate of 7.1% and monthly deposits, the estimated figures are shown below.

Monthly investment

Total invested over 15 years

Estimated interest

Corpus after 15 years

₹1,000 ₹1.80 lakh ₹1.45 lakh ₹3.25 lakh
₹5,000 ₹9.00 lakh ₹7.27 lakh ₹16.27 lakh
₹1,0000 ₹18.00 lakh ₹14.55 lakh ₹32.55 lakh

Key features of PPF investments

The salient features of PPF investments and their associated factors are as follows:

  1. PPF has an initial tenure of 15 years.
  2. This can be subsequently extended in 5-year blocks.
  3. Deposits between ₹500 and ₹1.5 lakh can be made in a financial year.
  4. Annually, 12 deposits are permitted.
  5. The promised interest rates can be amended in future.

Another key aspect of Public Provident Fund (PPF) investments is their tax treatment. Eligible contributions qualify for deductions under Section 80C, subject to applicable tax laws and regulations. Interest earned on PPF accounts is tax‑free under prevailing provisions. In addition, loans and partial withdrawals are permitted, subject to scheme conditions.

Also Read | PPF vs NSC: ₹5 lakh for 5 years—here’s where your money could grow more

Therefore, at 7.1%, a ₹1,000 monthly investment can grow to roughly ₹3.25 lakh, whereas a ₹10,000 monthly investment can grow to ₹32.55 lakh over 15 years.

To ensure long-term economic growth, investors should understand the basic features of such small savings schemes and consult certified financial advisors before investing.

Disclaimer: These figures are illustrative and assume a constant 7.1% interest rate. Actual returns may vary as PPF rates are subject to government revision. Tax benefits are subject to prevailing laws.

About the Author

Shivam writes on personal finance, equity markets, and mutual funds. He has previously contributed to several leading publications, including Moneycontrol. He can be reached at shivam.shukla@htdigital.in

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