How to Calculate EMI: Complete Guide
Understand the EMI formula, how banks calculate your monthly payment, and how to lower your effective interest cost.
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EMI stands for Equated Monthly Installment, the fixed amount you pay your lender every month. It is the same number from month one to the last month of the loan, even though the split between principal and interest changes over time.
The formula
EMI = P × r × (1 + r)^n / ((1 + r)^n − 1)
Where P is the principal (loan amount), r is the monthly interest rate (annual rate / 12 / 100) and n is the number of months.
How interest is front-loaded
In the first few months, almost all your EMI goes toward interest. Slowly the split tilts toward principal. By the last few months, almost the entire EMI reduces principal. This is called amortization.
Real example
Borrow Rs 500,000 at 12% annual for 5 years (60 months). - Monthly rate: 1% - EMI: Rs 11,122 - Total paid: Rs 667,320 - Total interest: Rs 167,320
Even at a fair rate, you pay 33% extra over the life of the loan.
Three ways to lower your EMI cost
1. **Larger down payment.** Borrow less, pay less interest. 2. **Shorter tenure.** Higher EMIs, but dramatically less interest. 3. **Prepayment.** Most lenders allow extra payments. Each prepayment reduces the principal, so future interest drops.
When the EMI changes
EMIs are fixed only at the rate quoted. If you have a floating-rate loan, your EMI can rise or fall as the bank's reference rate changes. Read your loan agreement.
Calculate your own
Try our Loan EMI Calculator to plug in your numbers and compare scenarios.