Equated Monthly Installment (EMI) & Loan Amortization Calculator

The Standard Reducing-Balance EMI Formula

Financial institutions worldwide calculate loan installments using the standard reducing-balance formula: EMI = [P × r × (1 + r)ⁿ] / [(1 + r)ⁿ - 1], where P represents the loan principal, r is the monthly interest rate (annual rate divided by 12 and 100), and n is the total tenure in months.

Because interest is calculated against the remaining outstanding principal balance at each cycle, the internal composition of your EMI shifts dramatically over time. In the early years of a 30-year mortgage, up to 70–80% of each monthly payment goes purely toward servicing interest, with only a small fraction reducing principal.

The Transformative Impact of Prepayments

Making even modest additional principal prepayments during the initial third of a loan tenure produces dramatic savings in total interest and substantially shortens the loan term. Because prepayments directly reduce the principal balance against which future interest compounds, a single extra EMI per year can shave 4 to 6 years off a 25-year home mortgage.

Our calculator details the full amortization schedule, showing the exact month-by-month principal vs. interest breakdown.

Step by step: how to use Loan EMI Calc

1. 1

   Enter the total borrowed loan amount (principal).

2. 2

   Input the annual interest rate offered by your lending institution.

3. 3

   Specify loan duration in years or total months.

4. 4

   View your instant calculated monthly EMI payment.

5. 5

   Inspect the Total Interest and Total Payment summaries.

6. 6

   Review the month-by-month Amortization Schedule table to track principal equity growth.

Frequently asked questions