How to Calculate Your Loan EMI (With a Simple Example)

If you have ever taken - or thought about taking - a home, car, or personal loan, you have met the term EMI. It stands for Equated Monthly Instalment: the fixed amount you pay the lender every month until the loan is fully repaid. Understanding how it is calculated helps you borrow confidently and avoid nasty surprises. Let's break it down.

What makes up an EMI?

Every EMI is made of two parts: a slice of the principal (the money you borrowed) and the interest (the lender's charge for lending it). The total stays the same each month, but the split changes over time - early on you pay mostly interest, and later you pay mostly principal. This is called a reducing-balance loan.

The EMI formula

The standard formula is:

EMI = P × r × (1 + r)ⁿ / ((1 + r)ⁿ − 1)

• P = principal (loan amount)
• r = monthly interest rate = annual rate ÷ 12 ÷ 100
• n = number of monthly instalments (loan tenure in months)

A worked example

Suppose you borrow 100,000 at 10% per year for 5 years (60 months).

• Monthly rate r = 10 / 12 / 100 = 0.008333
• n = 60
• Plugging in gives an EMI of roughly 2,125 per month.

Over 60 months you would pay about 127,482 in total - meaning roughly 27,482 in interest on top of the 100,000 you borrowed. Seeing that total interest figure is exactly why running the numbers first matters.

How the three inputs change your EMI

• Loan amount - a bigger loan means a bigger EMI, in direct proportion.
• Interest rate - even a 1% difference can add up to a surprising amount over a long tenure, so it pays to compare lenders.
• Tenure - here's the trade-off many people miss: a longer tenure lowers your monthly EMI but raises the total interest you pay. A shorter tenure costs more each month but far less overall.

Tips before you borrow

1. Decide on a monthly EMI you can comfortably afford - a common guideline is to keep all your EMIs under 40% of your take-home income.
2. Compare the total interest, not just the monthly figure, when choosing a tenure.
3. Ask whether the quoted rate is a "flat" rate or a reducing-balance rate - a flat rate looks lower but effectively costs almost double.
4. Factor in processing fees and insurance, which the EMI formula doesn't include.

Rather than do the arithmetic by hand, plug your numbers into our free EMI calculator and see the full breakdown instantly, including how each payment splits between principal and interest.