A worked example of the month-by-month calculation the post office uses, the annual credit on 31 March, and the difference between the passbook balance and what the account has really earned.
April versus March, lump sum versus monthly: how the timing of the same ₹1.5 lakh changes the maturity value by up to ₹5 lakh, and how to choose what fits your cash flow.
Interest is calculated on the lowest balance between the 5th and the end of the month. Here is what that means, with numbers, and how to never lose a month again.
Who can open an account, how much you can deposit, when it matures, what you can withdraw at 18, and the two rules that quietly decide how much interest you earn.