PPF Calculator

The calculator puts your full yearly deposit in at the start of each financial year and adds a full year's interest at the rate you enter, compounding once a year. With the default inputs (₹1,50,000 a year at 7.1% for 15 years):

• Total deposited: ₹22,50,000
• Maturity value: about ₹40,68,209
• Interest earned: about ₹18,18,209

7.1% is the PPF rate for the October–December 2026 quarter, unchanged from the previous quarter. The government reviews it every quarter, while the calculator holds one rate for all 15 years, so treat the result as an estimate. To see the range, run a lower and a higher rate: at 6.5% the same deposits give about ₹38,63,102, and at 7.5% about ₹42,11,586.

PPF interest is worked out every month on the lowest balance between the close of the 5th day and the end of the month, and credited once a year at the end of the financial year. A deposit made on or before the 5th earns interest for that month; a deposit made on the 6th does not.

The calculator's result matches the best case: the full amount deposited by 5 April every year. Here is how other habits compare for ₹1,50,000 a year at 7.1% over 15 years:

In the first year alone, a lump deposit by 5 April earns ₹10,650 in interest, while monthly deposits of ₹12,500 earn about ₹5,769. If you save from salary each month, monthly deposits are fine; just pay before the 5th, not after. If you have the money in April, depositing it then is worth more than spreading it out.

PPF matures 15 years after the end of the financial year in which you opened it, and you can extend it indefinitely in 5-year blocks, with or without fresh deposits. If you want to keep depositing, you must ask for the extension within one year of maturity.

The calculator assumes you keep depositing every year, so set the period in 5-year steps to match the blocks:

For an extension without deposits, the PPF calculator cannot model it directly. Take the 15-year maturity value and grow it at the same rate with yearly compounding, which the lumpsum calculator does: ₹40,68,209 at 7.1% for 5 years gives about ₹57,32,587.

You can deposit a minimum of ₹500 and a maximum of ₹1,50,000 in a financial year, in multiples of ₹50. The calculator caps the yearly amount at ₹1,50,000 for that reason. Smaller amounts scale in proportion: ₹1,00,000 a year for 15 years at 7.1% gives about ₹27,12,139, and ₹50,000 a year about ₹13,56,070.

• Tax deduction: deposits qualify under section 123 of the Income-tax Act, 2025 (formerly 80C) only if you use the old regime. The ₹1.5 lakh deduction limit covers all your section 123 investments together, not PPF alone.
• New regime: there is no deduction for the deposit, but the interest and maturity amount stay tax-free, so the calculator's figure is also your post-tax figure.
• Keep the account active: deposit at least ₹500 every year, even in a tight year, so the account keeps running in good standing.