Amortization Calculator

The real cost of borrowing

The sticker price of a house is one thing. The total amount you actually pay the lender is another — and the gap between them is the interest.

This calculator multiplies the monthly payment by the total number of months in the amortization, then subtracts the original principal. The remainder is interest paid over the life of the loan.

Two levers shrink that interest fast: a shorter amortization (pay more each month, finish sooner, pay far less interest in total) and prepayments (most lenders allow 10–20% lump-sum prepayments each year without penalty). Even modest annual prepayments can save tens of thousands over a 25-year term.

For an actual quote against your file, request one and we'll come back with real numbers.