EMI Calculator & Loan Repayment Guide

Quick Answer: An EMI (Equated Monthly Installment) is a fixed payment made by a borrower to a lender at a specified date each calendar month. EMIs are applied to both interest and principal each month, so that over a specified number of years, the loan is paid off in full.

📍 Why it matters: Impacts monthly cash flow 📍 How to lower: Increase tenure or down payment

Use this free EMI calculator to work out the monthly repayment on a home, car, or personal loan. It applies the standard reducing-balance amortization formula to give a precise breakdown of principal and interest across your loan tenure, so you can see exactly how much each instalment costs and how much interest you pay over the full term. Adjust the loan amount, rate, and tenure to compare scenarios. All calculations are private and happen entirely in your browser.

Try an example:
Monthly EMI
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Total interest
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Total payment
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SIP calculator → FD calculator → Salary calculator → What is EMI? → Buy vs. Rent 2026 →

Related Guide: Learn more about EMI

Each EMI: principal vs interestY1Y2Y3Y4Y5Y6Y7Y8PrincipalInterest
Every instalment is the same size, but early payments are mostly interest (grey) and later ones mostly principal (green) — which is why prepaying early saves the most.

How your EMI is actually calculated

Every EMI (Equated Monthly Installment) is computed with the reducing-balance formula EMI = P · r · (1+r)^n / ((1+r)^n − 1), where P is the principal, r is the monthly interest rate (annual rate ÷ 12 ÷ 100) and n is the number of months. The instalment stays fixed, but its split changes every month: early payments are mostly interest, later ones mostly principal.

Worked example

On a ₹30,00,000 home loan at 8.5% for 20 years (240 months), the EMI is about ₹26,035. Over the full term you repay roughly ₹62.5 lakh — meaning ₹32.5 lakh, more than the principal itself, is interest. Raising the tenure to 30 years lowers the EMI to ~₹23,000 but pushes total interest past ₹53 lakh. Shorter tenure = higher EMI, far less interest.

Why prepayment matters most early

Because early instalments are interest-heavy, a prepayment in year 1–5 removes principal that would otherwise have compounded interest for the remaining term. A single extra EMI per year on the example above can cut the tenure by roughly 3 years. Always confirm whether your lender charges a prepayment penalty (floating-rate retail loans in India usually cannot).

⚠️ Common Mistakes to Avoid

Frequently asked questions

What is EMI?

Equated Monthly Installment (EMI) is a fixed payment made by a borrower to a lender at a specified date each month.

Can I prepay my loan?

Most loans allow prepayment, which can significantly reduce your total interest and tenure.

Related guides

What is EMI? → Buy vs Rent (2026) →
Reviewed by the ToolsmithPro editorial team · Last updated June 2026. Every calculation and conversion runs entirely in your browser — your inputs are never uploaded, stored or shared. Formulas and methodology are documented on our about page; spot an error? tell us and we'll fix it.