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EMI Calculation Formula Explained (and How to Pay Less Interest)

Updated 22 Oct 2026 · 2 min read

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EMI is the fixed amount you pay every month until the loan is closed. Part of it is interest and part repays the loan.

The formula

EMI = P × r × (1 + r)^n ÷ ((1 + r)^n − 1)

  • P = loan amount
  • r = monthly interest rate (yearly rate ÷ 12 ÷ 100)
  • n = number of months

Example: ₹10,00,000 at 9.5% for 5 years gives an EMI of about ₹21,000 and total interest of about ₹2.6 lakh. Check yours with the free EMI calculator.

How to pay less interest

  • Choose a shorter tenure if you can manage the EMI
  • Prepay whenever you get a bonus; it cuts interest the most in the early years
  • Compare offers: a 0.5% lower rate saves a lot on a long home loan

The Loan EMI & Debt Planner shows exactly how much each prepayment saves.

This is an estimate. Your bank may calculate slightly differently.

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