An EMI (equated monthly instalment) is the fixed amount you pay every month until a loan is cleared. It looks simple, but the way interest is built into it explains why the first years of a loan feel like you are getting nowhere — and why prepaying early saves so much.
Try the calculatorEMI CalculatorMonthly payment for any loan→The EMI formula
EMI = P × r × (1 + r)^n ÷ ((1 + r)^n − 1)
- P is the loan amount.
- r is the monthly interest rate (annual rate ÷ 12 ÷ 100). At 9% a year, r = 0.0075.
- n is the number of monthly payments (5 years = 60).
You never need to do this by hand, but it shows that EMI depends on just three things: amount, rate and tenure.
Example: ₹10 lakh personal loan at 9% for 5 years
| Amount | |
|---|---|
| Monthly EMI | ₹20,758 |
| Total interest | ₹2,45,501 |
| Total paid | ₹12,45,501 |
Each EMI covers that month's interest first; the rest reduces the loan. In month one, interest is ₹7,500 (0.75% of ₹10 lakh), so only about ₹13,258 goes towards the principal. As the balance falls, the interest part shrinks and more of each EMI repays the loan.
Example: ₹50 lakh home loan
Small changes in rate and tenure make a big difference on large loans:
| Rate and tenure | EMI | Total interest |
|---|---|---|
| 8.5% for 20 years | ₹43,391 | ₹54,13,879 |
| 8.5% for 15 years | ₹49,237 | ₹38,62,656 |
| 8.0% for 20 years | ₹41,822 | ₹50,37,281 |
Choosing 15 years instead of 20 raises the EMI by about ₹5,800 a month but saves over ₹15.5 lakh in interest. Getting a rate 0.5% lower saves about ₹3.8 lakh over 20 years.
Try the calculatorHome Loan CalculatorEMI for a house purchase→How much does prepayment save?
On the same ₹50 lakh loan at 8.5% for 20 years:
| Prepayment plan | Interest saved | Loan closes earlier by |
|---|---|---|
| ₹5 lakh once, after 2 years | about ₹14.6 lakh | 45 months |
| ₹1 lakh at the end of every year | about ₹18.6 lakh | 72 months (6 years) |
Prepayments work best early in the loan, when most of each EMI is interest. Keep the same EMI and let the tenure shrink — that saves far more than reducing the EMI.
Try the calculatorLoan Prepayment CalculatorInterest saved by paying early→Watch out for "flat" interest rates
Some car, two-wheeler and consumer loans quote a flat rate, where interest is charged on the original amount for the whole term even as you repay it. A 7% flat rate works out to roughly a 12.5–13% reducing-balance rate — almost double. Always ask for the reducing-balance rate (or APR), or convert it with the flat vs reducing rate calculator.
5 ways to pay less interest
- Choose the shortest tenure you can comfortably afford. Keep total EMIs under about 40–50% of take-home pay.
- Negotiate the rate — a better credit score or a balance transfer to another lender can cut it.
- Make a bigger down payment on homes and cars.
- Prepay whenever you get a bonus, ideally in the first third of the loan. Check for prepayment charges first (floating-rate home loans to individuals in India generally have none).
- Avoid processing-fee traps — compare total cost, not just the rate, using the loan comparison calculator.
This article is general information, not personal financial, tax or legal advice. Rules and rates change — check the latest figures with an official source or a qualified adviser. Read our disclaimer.