Understanding the Sukanya Samriddhi Yojana interest calculation helps you see exactly how a small yearly deposit can grow into a large sum for your daughter’s future. Sukanya Samriddhi Yojana, often called SSY, is a government-backed savings scheme for a girl child, and its interest is compounded yearly on the balance in the account. Because the rate is set by the government and reviewed every quarter, the final maturity amount depends on how much you deposit, when you deposit it, and how long the money stays invested.
This guide explains the interest formula step by step, works through a full example, and answers the questions parents ask most often. To skip the manual maths, use our free Sukanya Calculator and enter your yearly deposit to see the estimated maturity value in seconds.
The Formula
SSY interest is calculated year by year, not in one lump sum. For each year, the interest is worked out on the balance plus any deposit made at the start of that year, and the interest is then added to the balance so that next year’s interest is calculated on a larger amount. That is annual compounding, and it is the reason the account grows faster in its later years.
Interest for a year = (opening balance + deposit made at the start of the year) x interest rate
Closing balance = opening balance + deposit + interest
Each term is simple. The opening balance is what was already in the account at the start of the year. The deposit is what you add that year, between Rs 250 and Rs 1,50,000 per financial year. The interest rate is the SSY rate announced by the government, currently 8.2% per year for the October to December 2026 quarter, and it is revised every quarter. You deposit for 15 years, but the account matures after 21 years, so interest keeps compounding for six more years after your last deposit. Finally, SSY has EEE tax status, which means the deposits, the interest, and the maturity amount are all tax-free.
How to Calculate Sukanya Samriddhi Yojana Interest Step by Step
- Decide your yearly deposit. You can deposit any amount from Rs 250 up to Rs 1,50,000 in a financial year.
- Deposit at the start of each year for 15 years, so that each deposit earns interest for the full year.
- For each year, multiply the opening balance plus the year’s deposit by the interest rate to get that year’s interest, then add it to the balance.
- After 15 years, stop depositing. Interest keeps compounding on the balance for six more years, until the account completes 21 years.
- Add up the results. Your maturity value is your total deposits plus the total interest earned over the whole period.
Worked Example
Suppose you deposit Rs 1,50,000 at the start of each year for 15 years, at an interest rate of 8.2% per year. Your total deposits come to 15 x Rs 1,50,000 = Rs 22,50,000.
With interest compounded yearly over the full 21-year period, the interest earned comes to Rs 49,32,119. Your maturity value is therefore Rs 22,50,000 + Rs 49,32,119 = Rs 71,82,119.
Notice how the interest, at Rs 49,32,119, is more than double the amount deposited. That is the power of compounding over 21 years, especially in the last six years when no new deposits are added but interest still accrues on the full balance. This example uses the 8.2% rate for the October to December 2026 quarter throughout; if the government revises the rate in later quarters, the actual maturity amount will differ slightly.
Common Mistakes / Good to Know
- Depositing late in the year: a deposit made at the start of the year earns a full year’s interest, while a deposit made near the year-end earns far less in that year.
- Assuming the rate is fixed for 21 years: the SSY rate is revised by the government every quarter, so any long-term projection is an estimate based on the current rate.
- Expecting the money after 15 years: deposits stop after 15 years, but the account matures after 21 years, and interest keeps accruing during those last six years.
- Depositing more than the limit: deposits above Rs 1,50,000 in a financial year do not earn interest, so there is no benefit in exceeding the cap.
One more point worth remembering: because the interest is fully tax-free, every rupee of interest in the example above stays with the family. That tax-free compounding is what makes SSY one of the most rewarding safe options for a daughter’s education or marriage fund.
Frequently Asked Questions
What is the current Sukanya Samriddhi Yojana interest rate?
The SSY interest rate is 8.2% per year for the October to December 2026 quarter. The government revises the rate every quarter, so the rate that applies in later years may be higher or lower than 8.2%.
For how many years do I need to deposit in SSY?
You deposit for 15 years from the date the account is opened. After that, no further deposits are made, but interest keeps compounding until the account matures after 21 years.
Is Sukanya Samriddhi Yojana interest taxable?
No. SSY has EEE tax status, so the deposits qualify for tax benefits, the interest earned is tax-free, and the maturity amount is also tax-free. The full maturity value stays with the family.
What happens if I miss a deposit in a year?
A missed year simply means less money compounding in the account, so the maturity value will be lower than the full-deposit example. You can still deposit in later years up to the yearly limit, but you cannot make up the missed year’s compounding, which is why regular yearly deposits matter.
For another government-backed small-savings option, this time for senior citizens, try our SCSS Calculator.
And to see how much of a salary actually reaches the bank each month, read How to Calculate In-Hand Salary from CTC: Formula and Example.
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