How to Calculate PPF Maturity Amount
Learn the step-by-step process to calculate your PPF maturity amount, including the formula, interest calculation method, and worked-out examples.
The PPF Maturity Formula
The PPF maturity amount depends on three things: your annual deposit, the interest rate, and the tenure (15 years minimum). The formula looks intimidating, but it's just compound interest with annual additions.
**Formula:**
Maturity Amount = P x [((1 + r)^n - 1) / r]
Where:
This formula assumes you deposit the same amount at the beginning of each year.
Step-by-Step Calculation Example
Let's calculate the maturity amount for Rs 1,50,000 deposited annually at 7.1% for 15 years.
**Year 1:**
**Year 2:**
**Year 3:**
The pattern continues for all 15 years. By the end, your total deposits of Rs 22,50,000 (Rs 1.5 lakh x 15) grow to approximately Rs 40,68,209.
How Interest Is Actually Calculated
There's a nuance most people miss. PPF interest isn't simply calculated on the annual balance. It's calculated monthly on the minimum balance between the 5th and last day of each month.
This means:
The interest is calculated monthly but credited to your account only on March 31st each year. So you see one annual credit, but the calculation happens 12 times.
What If You Deposit Different Amounts Each Year?
The formula above assumes equal annual deposits. In reality, PPF allows you to deposit any amount between Rs 500 and Rs 1,50,000 per year. If your deposits vary, you need to calculate year by year.
This is where a [PPF calculator](/) becomes essential. Manually computing 15 years of varying deposits is tedious and error-prone. Our calculator handles it instantly.
Factors That Affect Your Maturity Amount
Quick Reference Table
| Annual Deposit | 15-Year Maturity (at 7.1%) | Total Interest Earned |
|---------------|---------------------------|----------------------|
| Rs 50,000 | Rs 13,56,070 | Rs 6,06,070 |
| Rs 1,00,000 | Rs 27,12,139 | Rs 12,12,139 |
| Rs 1,50,000 | Rs 40,68,209 | Rs 18,18,209 |
Use our [PPF calculator](/) to compute your exact maturity amount based on your planned deposits. For comparison with market-linked investments, check out the [SIP Calculator](https://sip-calc-india.pages.dev).