Before you take a personal loan, housing loan or vehicle loan, the most important number is the EMI (equated monthly installment): the fixed amount you pay every month until the loan is finished. Knowing how it’s calculated helps you compare offers, choose the right tenure and spot a deal that is more expensive than it looks.
The EMI formula
EMI = P × r × (1 + r)ⁿ ÷ ((1 + r)ⁿ − 1)
- P is the loan amount (the principal).
- r is the monthly interest rate: the yearly rate ÷ 12 ÷ 100. A 12% yearly rate gives r = 0.01.
- n is the number of monthly installments: 5 years = 60 months.
A worked example
Say you borrow Rs. 1,000,000 at 12% per year for 5 years.
- r = 12 ÷ 12 ÷ 100 = 0.01, and n = 60.
- (1 + r)ⁿ = 1.01⁶⁰ ≈ 1.8167.
- EMI = 1,000,000 × 0.01 × 1.8167 ÷ (1.8167 − 1) ≈ Rs. 22,244.
Over 60 months you pay about Rs. 1,334,667 in total, so the interest costs you about Rs. 334,667.
How the tenure changes what you pay
Same loan, same 12% rate, different tenures:
| Tenure | Monthly EMI | Total interest | Total paid |
|---|---|---|---|
| 3 years | Rs. 33,214 | Rs. 195,715 | Rs. 1,195,715 |
| 5 years | Rs. 22,244 | Rs. 334,667 | Rs. 1,334,667 |
| 7 years | Rs. 17,653 | Rs. 482,830 | Rs. 1,482,830 |
A longer tenure makes each month easier, but the total interest grows quickly. Going from 5 to 7 years saves Rs. 4,591 a month but costs about Rs. 148,000 more overall.
Why your first payments are mostly interest
Each month, interest is charged on what you still owe. In month one you owe the full Rs. 1,000,000, so the interest is 1% of that: Rs. 10,000. Only the remaining Rs. 12,244 of your EMI reduces the loan. As the balance falls, the interest part shrinks and more of each payment goes to the loan itself. That’s why paying extra early in the loan saves the most.
Watch out for “flat rate” offers
Some lenders, especially for vehicle leasing and some finance companies, quote a flat rate instead of a reducing-balance rate. A flat rate charges interest on the original amount for the whole period, even though you repay part of it every month.
At 12% flat for 5 years, the interest is 1,000,000 × 12% × 5 = Rs. 600,000, and the monthly payment is Rs. 1,600,000 ÷ 60 = Rs. 26,667. To pay that much on a normal reducing-balance loan, the rate would have to be about 20.3% per year. So “12% flat” costs roughly the same as 20% reducing.
Ways to pay less
- Choose the shortest tenure whose EMI you can comfortably afford.
- Make a bigger down payment so you borrow less. Percentage Calculator helps you work out what 20% or 30% of a price is.
- Compare at least two or three banks: even 1–2% lower makes a big difference over several years.
- Ask about early settlement charges before signing, in case you want to pay off the loan early.
- Remember that processing fees, insurance and other charges are usually on top of the EMI.
These figures are estimates for learning and comparison. Your bank’s exact EMI may differ slightly because of fees, insurance and rounding. This guide is not financial advice.
Common questions
Is a lower EMI always better?
No. A lower EMI usually means a longer tenure, which means more interest in total. Pick the shortest tenure you can comfortably afford.
Does the calculator work in rupees?
Yes. Enter the amount in rupees, or any other currency, and the results come out in the same currency.
What is the difference between a flat and a reducing rate?
A flat rate charges interest on the original loan amount for the whole period. A reducing rate charges interest only on what you still owe, so the same percentage costs much less.
Can I see how much I owe each year?
Yes. The Loan EMI Calculator shows a year-by-year schedule with the interest paid and the balance left.