Loan Amortization Explained
Amortization is the process of paying off a loan through regular scheduled payments over time. Each payment covers accrued interest first, with the remainder reducing the principal. An amortization schedule shows you exactly how every payment breaks down and how your balance decreases over the life of the loan.
How the split shifts over time
In early payments, most of the fixed monthly amount goes to interest because the balance is high. As the principal falls, less interest accrues each month, so more of each payment reduces principal. This is why paying even a small extra amount early in the loan has a dramatically larger effect than paying the same extra amount late.
Reading an amortization table
Each row in an amortization schedule shows: payment number, payment amount, portion going to interest, portion going to principal, and remaining balance. The amortization calculator generates this full table — you can scan down to see exactly when your balance dips below a target amount or how many years remain at any point.
Strategies to pay off faster
Making one extra payment per year (13 instead of 12) on a 30-year mortgage can cut 4–5 years off the loan and save tens of thousands in interest. Bi-weekly payments (26 half-payments instead of 12 full ones) achieve a similar effect. The calculator lets you model extra payment scenarios to see the exact savings.