Blog / How EMI Works: A Plain-English Guide With an Example

How EMI Works: A Plain-English Guide With an Example

By Haseeb Mukhtar · Published 2026-10-01

If you have ever taken a car, home or personal loan, you have paid an EMI. The word looks technical, but the idea is simple. A lender gives you a lump sum today, and you return it in equal monthly payments with interest added. This guide explains what is inside each payment and how to use that knowledge to borrow more wisely.

What is inside one instalment

Every EMI is split into interest and principal. In the first month, interest is charged on the full amount you borrowed, so a large share of the payment is interest. As the balance falls, the interest part shrinks and the principal part grows. The total instalment stays the same, but its makeup changes every month.

The formula

EMI = P × r × (1 + r)n / ((1 + r)n − 1). Here P is the amount borrowed, r is the monthly rate (annual percentage divided by 1,200) and n is the number of months. You do not need to do this by hand: our EMI calculator does it instantly.

An example you can follow

Borrow 1,000,000 at 12% a year for 5 years. The monthly rate is 1% and n is 60. The EMI comes to roughly 22,244. Multiply by 60 and you repay about 1,334,667, which means around 334,667 goes to interest. Now stretch the same loan to 10 years. The monthly payment drops to about 14,347, but total interest rises to roughly 721,600. A lower EMI feels comfortable, yet it can cost you much more overall.

How to pick a tenure

Start with the highest monthly payment you could afford for several months without stress, then choose the shortest tenure that fits it. If you receive a bonus or extra income, ask whether your lender allows part prepayment without a penalty, since early extra payments cut interest the most.

Questions to ask your lender

  • Is the rate fixed or floating?
  • What are the processing and documentation fees?
  • Is there a charge for early settlement or part payment?
  • Is insurance mandatory, and is it added to the loan?

Comparing the total amount repaid, not just the monthly figure, is the simplest way to avoid expensive surprises.