Calculate your exact GPF interest and closing balance using the Rule 11 monthly-balance method at the current 7.1% rate — free, instant, and accurate to your actual passbook.
What Is a GPF Interest Calculator?
A GPF interest calculator works out how much interest your General Provident Fund balance earns in a year, using the actual month-by-month method the government follows — not a rough annual estimate. It's built for central and state government employees, defence personnel, railway staff, and anyone subscribing to the General Provident Fund or a similar scheme like the Contributory Provident Fund. If you're a PAO or DDO checking a subscriber's account, this tool works for you too. Most online GPF calculators average out your yearly contribution and call it a day. That shortcut can be off by a few thousand rupees over a full career.
GPF interest is governed by Rule 11 of the General Provident Fund (Central Services) Rules, 1960, administered by the Department of Economic Affairs, Ministry of Finance. The rate is reviewed every quarter and currently stands at 7.1% per annum for the July–September 2026 quarter, unchanged for several quarters running. You can check the latest notified rate directly on the DEA's interest rate page.
The month-wise formula looks like this:
Monthly Rate = Annual Rate ÷ 1200
For each month:
Balance = Previous Balance + That Month's Subscription
Interest for the Month = Balance × Monthly Rate
Total Interest (Year) = Sum of all 12 monthly interest figures
Closing Balance = Final Month's Balance + Total Interest
Interest gets added to your account only once, at year-end, but it's calculated separately for every single month based on that month's running balance. That's why a lump-sum "average balance" shortcut never quite matches your actual passbook figure.
The math runs entirely in your browser. Nothing you enter gets sent anywhere or stored.
Suresh works for a central government department in Nagpur. His GPF balance stood at ₹4,50,000 on 1st April, and he contributes a fixed ₹6,000 every month. He wants to know his year-end position at the current 7.1% rate.
Here's what the calculator does behind the scenes:
Add up all twelve months of interest and Suresh earns roughly ₹34,719 for the year. His closing balance works out to about ₹5,56,719 — that's ₹5,22,000 in principal plus ₹34,719 in interest, credited at year-end. Priya, a colleague in the same office who joined GPF only in October, would run the same tool with just 6 months entered and her actual joining-month balance.
The GPF rate has held steady at 7.1% since the April–June 2020 quarter, matching the Public Provident Fund rate every quarter since. For the current July–September 2026 quarter, the Department of Economic Affairs confirmed the rate stays unchanged, in line with its broader small-savings-schemes notification for the quarter. Ramesh, who tracks these updates for his union's newsletter, points out that the rate hasn't moved even once in over six years — useful to know if you're projecting balances several years out. Always pull the current quarter's figure from the DEA notification before relying on any projection for official use.
Your balance for that month (opening balance plus that month's subscription) is multiplied by the annual rate divided by 1200. This gets repeated for each month separately, and the twelve figures are added up. It's not one flat calculation on your average yearly balance — that's the part most people miss.
The rate is 7.1% per annum for the July–September 2026 quarter, unchanged from the previous several quarters. The Department of Economic Affairs reviews and notifies this rate every quarter, so it's worth checking their site if you're calculating for an earlier or later quarter.
Annually. Interest is worked out on a monthly basis using that month's running balance, but it only gets credited to your account once a year. You won't see it reflected month-to-month in your passbook — it typically shows up as a single year-end entry.
Yes. Just set your opening balance to whatever it was when you joined (often zero), and enter the number of months from your joining month to March. Farida, who joined in December, would enter 4 months and her actual starting balance.
GPF interest is exempt under Section 10(11) of the Income-tax Act, but only up to ₹5 lakh in combined annual contributions. Cross ₹5 lakh in a year, and interest on the excess becomes taxable as "Income from Other Sources," calculated separately under Rule 9D of the Income-tax Rules. Most subscribers never touch this limit, but check your Form 16 if your basic pay and subscription rate are both high.
Because it follows the actual Rule 11 method — month-by-month — instead of assuming your whole year's contribution sat in the account from day one or landed exactly at mid-year. Over a full career, that difference adds up to real money.
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