EMI Calculator
Work out your monthly instalment on a home, car or personal loan, then test a prepayment and watch the interest bill and the loan tenure shrink in real time.
Loan details
Standard reducing-balance EMI, the method every Indian bank uses.
Amortisation schedule
How each year of EMIs splits between interest and principal, including any prepayments you have added above.
| Year | Opening balance | Principal repaid | Interest paid | Prepayment | Closing balance |
|---|
How your EMI is calculated
One formula decides every reducing-balance loan in India, here is what is inside it.
The formula
Here P is the amount borrowed, r is the monthly interest rate (annual rate ÷ 12 ÷ 100) and n is the number of monthly instalments. The EMI stays constant, but its composition changes every month: interest is charged only on the balance still outstanding, so early EMIs are interest-heavy and the principal share grows as the balance falls.
That is exactly why prepayment is so powerful. Every extra rupee goes straight to the principal, and all the future interest that rupee would have generated, often for 15 or 20 more years, simply disappears from your schedule.
Worked example
Scenario: Home loan of ₹30,00,000 at 9% p.a. for 20 years (240 months). Monthly rate r = 9 ÷ 12 ÷ 100 = 0.0075.
Interest ends up larger than the loan itself, which is normal for long tenures, and the reason even small prepayments matter.