Legal Glossary
Amortization
The process of paying off a loan through scheduled payments that cover both principal and interest, with the interest portion decreasing over time.
Legal Definition
Amortization is the gradual repayment of a loan through a series of scheduled payments over a defined term. Each payment covers both interest and principal. In a fully amortizing loan, the payments are structured so that the outstanding balance reaches exactly zero at the end of the term — if you make every scheduled payment, the loan is fully paid off. The amortization schedule is a table showing, for each payment, exactly how much goes to interest, how much reduces principal, and the remaining balance after each payment. In the early years of a long loan, payments are primarily interest; as the principal shrinks, a larger proportion of each payment reduces the principal.
In Plain English
Amortization is how your loan gets paid off over time through regular payments. Each monthly payment you make covers two things: the interest that accrued since your last payment, and a portion of the actual money you borrowed (the principal). In the early years of a 30-year mortgage, most of each payment is interest — you might be paying $1,500/month but only $200 of it reduces what you owe. By the final years of the loan, the ratio flips — most of each payment is principal because the balance is small and there's little interest to cover. This front-loading of interest is by design. It means that if you sell or refinance early, you've built up relatively little equity — you've been mostly paying interest, not principal. Looking at a full amortization schedule shows the true cost of a long-term loan.
Real-World Example
Maria takes out a $300,000 mortgage at 7% interest for 30 years. Her monthly payment is $1,996. In month 1: $1,750 goes to interest (7% of $300,000 ÷ 12) and $246 reduces the principal to $299,754. In month 12: $1,742 is interest and $254 is principal. By year 15 (midpoint): roughly $1,400 is interest and $596 is principal. By year 29: most of the payment is principal and very little is interest. Over the full 30 years, Maria pays $718,560 total — $418,560 of which is interest. An amortization table reveals this total before she commits.