Loan EMI Explained: Formula, Examples & How to Reduce It

Equated Monthly Installment (EMI) is the fixed amount you pay every month to repay a loan.

EMI formula

EMI = P × r × (1+r)ⁿ / ((1+r)ⁿ − 1), where P is principal, r is monthly interest rate, n is months.

Factors affecting EMI

Three variables: principal amount, interest rate, and tenure. Reducing any one lowers EMI.

Strategies to reduce EMI

Larger down payment, longer tenure, or refinance when rates drop.

Prepayment

Even small extra payments save significant interest over the life of the loan.

How this guide is researched and fact-checked

This article is written by Rahul Verma, CA (Chartered Accountant · 8 yrs in retail lending & FP&A) and reviewed by the ToolKit Pro editorial desk before publication. Every number, formula and threshold quoted here is traced back to a primary standards body or health authority rather than to another blog, and each figure is re-computed with our own calculators so the worked examples and the live tools on this site always agree. When a definition changes — as with the 2019 SI redefinitions — the affected articles are re-checked and the “updated” date above is bumped.

Written by: Rahul Verma, CA — Personal Finance Contributor
Reviewed by: ToolKit Pro Editorial Desk
Last reviewed: 2026-06-11
Corrections: spotted an error? Tell us and we will fix and re-date the page.

Sources & further reading

BIPM — The International System of Units (SI Brochure)
NIST — Guide for the Use of the International System of Units
WHO — Body weight & health guidance

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