Formula used
Remaining deposit years = max(15 − completed account years, 0). Remaining maturity years = max(21 − completed account years, 0). Starting with the current balance, the model adds the planned deposit at the beginning of each remaining deposit year and applies the entered annual interest assumption through the 21st year from account opening.
Example calculation
For a new account, the model allows 15 annual deposits and projects maturity 21 years after opening regardless of whether the girl was age 1, 5 or 9 at opening. For an existing account, enter completed account years and the current passbook balance.
How to use this calculator
- Enter the girl's completed age when the account was opened to validate eligibility.
- Enter completed years since account opening; use zero for a new account.
- For an existing account, enter the latest passbook balance.
- Enter the annual amount planned for each remaining deposit year.
- Use 8.2% for the Jul-Sep 2026 assumption or enter another scenario.
- Review remaining deposit years, remaining term, deposits and projected interest separately.
Important assumptions
- The account was validly opened before the girl attained age 10.
- Deposits continue only through 15 years from account opening.
- Maturity is modelled at 21 years from account opening.
- One planned deposit is added at the beginning of each remaining scheme year.
- The entered interest rate stays constant for projection only; actual rates can change quarterly.
- The current balance for an existing account accurately captures prior deposits and credited interest.
Common mistakes to avoid
- Calculating maturity as 21 minus the girl's current age.
- Stopping deposits when the girl turns 15 instead of 15 years from account opening.
- Projecting an existing account without entering its current balance.
- Treating 8.2% as guaranteed for the entire remaining term.
- Claiming a fixed 80C tax saving without checking regime and remaining limit.
When this tool is useful
- When you want a fast estimate before making a financial or salary decision.
- When you want to compare different assumptions in seconds.
- When you want to understand the formula behind the result.