What Is a Monthly Loan Payment (EMI)?
A monthly loan payment — also called an EMI (Equated Monthly Instalment) — is the fixed amount you pay your lender each month until the loan is fully repaid. Every payment covers two things: a portion of the principal (the original amount you borrowed) and the interest charged on the remaining balance.
In the early months of a loan, most of your payment goes toward interest. As the loan balance reduces, a progressively larger share of each payment goes toward the principal. This is called amortization, and it's why the total interest you pay is often far more than people expect — especially on long-tenure loans like mortgages.
The Formula Behind the Calculation
This calculator uses the standard loan amortization formula used by banks and lenders worldwide:
EMI = P × r × (1+r)^n ÷ [(1+r)^n − 1]
Where P is the loan principal, r is the monthly interest rate (annual rate ÷ 12 ÷ 100), and n is the total number of monthly payments. This formula is used for mortgages, car loans, personal loans, student loans — any fixed-rate instalment loan.
Shorter Tenure vs Longer Tenure — Which Is Better?
This is one of the most important decisions you'll make when taking a loan. Here's the trade-off:
Shorter tenure: Higher monthly payment, but significantly less total interest. You pay off the loan faster, build equity sooner (on property loans), and pay far less to the lender over the life of the loan.
Longer tenure: Lower monthly payment, which is easier on your monthly cash flow. But the total interest you pay over the life of the loan is much higher — sometimes more than the principal itself.
Use this calculator to compare. A $200,000 mortgage at 7% over 15 years vs 30 years results in dramatically different total interest costs. The numbers are often surprising — run both scenarios before deciding.
The Impact of Extra Payments
Making even occasional extra payments toward your loan principal can dramatically reduce your total interest and shorten your repayment period. Because interest is calculated on the remaining balance, any reduction in principal reduces every future interest charge. On a 30-year mortgage, making one extra payment per year can cut 4–6 years off the loan and save tens of thousands in interest.
Always check whether your lender charges a prepayment penalty before making extra payments — some do, particularly in the first few years of the loan.
Fixed Rate vs Variable Rate Loans
This calculator assumes a fixed interest rate — the rate stays the same for the full tenure. Many loans (especially mortgages in some countries) offer variable or floating rates that change with market conditions. If you have a variable rate loan, use your current rate to estimate your payment, but know that your actual payments may change if rates move.