What is EMI? How EMI is Calculated in India

What is EMI?

An Equated Monthly Instalment (EMI) is a fixed payment made by a borrower to a lender on a specified date each calendar month. EMIs are used to pay off both interest and principal every month so that over a specified number of years, the loan is paid off in full.

The EMI Formula

The standard EMI formula is:

EMI = P × r × (1+r)ⁿ / [(1+r)ⁿ − 1]

Where:

P = Principal loan amount

r = Monthly interest rate (annual rate ÷ 12 ÷ 100)

n = Total number of monthly instalments (years × 12)

Example Calculation

For a ₹50,00,000 home loan at 8.5% per annum for 20 years:

r = 8.5 / 12 / 100 = 0.007083

n = 20 × 12 = 240

EMI ≈ ₹43,391/month

Total payable ≈ ₹1,04,13,840

Total interest ≈ ₹54,13,840

Reducing Balance vs Flat Rate

Reducing balance (most home and car loans): Interest is charged on the outstanding principal. Your effective interest cost is lower as the principal reduces each month.

Flat rate (some personal loans): Interest is calculated on the original principal throughout the tenure. The effective interest rate is roughly double the stated flat rate.

Tips to Reduce Your EMI

1. Make a higher down payment — reduces principal, directly lowering EMI.

2. Choose a longer tenure — lowers monthly EMI but increases total interest paid.

3. Negotiate a lower interest rate — even 0.25% less can save lakhs over 20 years.

4. Make part prepayments — reduces outstanding principal and shortens tenure.

Use the MCalci EMI Calculator to find your exact EMI instantly.