Understanding your result
The balance includes the opening amount, new deposits, and interest. Each table row is a complete April–March financial year. Annual interest is rounded to the nearest rupee in this estimate.
For a child-specific savings scheme with a different deposit term, use the Sukanya Samriddhi Calculator .
The formula
A deposit credited on or before the fifth participates in that month’s eligible balance. A later deposit starts contributing to interest next month. Interest is added at year end, so it earns further interest in later years.
Worked example
With no opening balance, twelve deposits of ₹1,000 credited by the fifth create eligible monthly balances of ₹1,000 through ₹12,000. Their sum is ₹78,000. At an assumed 7.1%, interest is ₹461.50, rounded to ₹462, and the first closing balance is ₹12,462.
How to use this calculator
- Choose monthly deposits or one deposit each April.
- Enter the amount and whether it is credited by the fifth.
- Set your assumed rate, projection length, and any opening balance.
- Select chart years or expand the table to inspect annual credits.
Timing a recurring transfer
Use the credit date recorded by the account provider, rather than the day you initiate a transfer. For the example above, changing every deposit to after the fifth reduces first-year interest to ₹391. The difference is ₹71 for that particular year and amount; it is not a fee or an interest-rate change.
Projection years and maturity are different
This model starts at the beginning of a financial year. A newly opened PPF account normally reaches its initial term after fifteen years counted from the end of its opening financial year. An opening part-year and later extension decisions therefore need separate attention. Entering fifteen here means fifteen full projected financial years, not a promise that an account opened today closes on that date.
Assumptions & limitations
What this calculation assumes
- The entered annual rate remains unchanged; deposits repeat without withdrawals or loans.
- An opening balance is already present before the first modeled month.
What to keep in mind
- Quarterly rate changes, partial first years, missed deposits, and extension eligibility are not modeled.
- The 7.1% default is a scenario assumption, not a live rate feed or a guaranteed future return.
Common questions
Can I contribute ₹1.5 lakh each month?
No. The annual contribution limit is ₹1.5 lakh. With twelve equal deposits, the largest monthly amount supported here is ₹12,500.
Why does an April lump sum produce more interest?
It is present for more of the year. With ₹12,000 credited by 5 April at the example 7.1% rate, the first-year interest is ₹852, compared with ₹462 for the monthly schedule.