Mortgage Amortization
Calculator

It breaks each payment into the portion going to interest versus principal, and shows the remaining loan balance after that payment. Early in the loan the interest portion dominates; later on, principal makes up most of each payment, even though the total payment stays the same on a fixed-rate loan.

Interest compounds over the life of the loan on whatever balance remains, and over 30 years even a moderate rate accumulates to a large sum — commonly equal to or exceeding the original loan amount on a 30-year mortgage. Shortening the term or making extra principal payments reduces this total meaningfully.

This crossover point depends on the interest rate and term, but on a typical 30-year loan at moderate rates it often falls somewhere around year 15 to 18 — roughly the midpoint or a bit later. Higher interest rates push this crossover point later in the loan.

This calculator generally assumes a fixed rate for the full schedule; an adjustable-rate mortgage would need the schedule recalculated at each rate reset using the new rate and remaining balance. Treat a fixed-rate amortization table as illustrative only if your loan can adjust.

Yes — the remaining balance column at any given month, subtracted from the home's value at that time, tells you the loan-paydown portion of your equity (excluding any change in market value). This is useful for planning a future sale, refinance, or home equity loan.