When a bank quotes you an EMI, they're quoting you the equal monthly instalment you'll pay over the loan tenure. What they rarely explain upfront is the amortization schedule: the month-by-month breakdown of how much of each payment chips away at your principal versus how much goes to the lender as interest.
In the early months of a loan, the interest component is at its peak. As your principal reduces, so does the interest and the principal repayment accelerates. Our Loan EMI Calculator makes this visible.
How EMI is Calculated
The standard EMI formula uses the diminishing balance method. Each month, interest is charged only on the remaining outstanding balance — not on the original loan amount. This is different from flat-rate loans, which are common in some markets and significantly more expensive.
The formula is: EMI = [P × r × (1+r)^n] / [(1+r)^n - 1], where P is the principal, r is the monthly interest rate, and n is the total number of months.
Always confirm whether your lender uses diminishing balance or flat-rate calculation. A flat-rate loan at 7% is equivalent to roughly 12-13% diminishing balance.
Reading the Amortization Chart
The stacked bar chart in the EMI calculator shows principal and interest components for each year of the loan. Notice how the interest bar shrinks year after year, this is diminishing balance in action.
This chart is particularly useful when you're deciding whether to make a prepayment. Prepaying early in the loan tenure has a dramatically larger impact than prepaying in the final year, because the interest component is still high.
Using the Yearly Schedule
The yearly breakdown table shows your opening balance, total payments, interest paid, and closing balance for each year. Use this to plan refinancing windows, prepayment timing, or simply to understand the true total cost of your loan which is always higher than the principal.