How Does an Amortization Schedule Work?
An amortization schedule is a table showing every payment over the life of a loan. Each row breaks down how much of that payment goes to interest versus principal. In the early years, the majority of each payment is interest. As the principal balance falls, more of each payment reduces the loan balance. The schedule ends with a zero balance.
Why Do You Pay More Interest at the Start of a Loan?
Interest is calculated on the remaining principal balance. When the balance is high at the beginning of the loan, interest charges are high too. As you make payments and the principal shrinks, the interest portion of each payment decreases while the principal portion grows. This is why extra early payments dramatically reduce total interest paid over the life of the loan.
What Types of Loans Use Amortization?
Mortgages, auto loans, personal loans, and student loans are all typically amortizing loans. Credit cards and home equity lines of credit (HELOCs) are not fully amortizing — they are revolving debts with variable balances. Interest-only loans defer principal repayment, creating a balloon payment or requiring refinancing at the end of the interest-only period.
Frequently asked questions
What happens if I make extra principal payments?
Extra principal payments reduce your outstanding balance immediately, which lowers future interest charges and shortens your loan term. Most lenders apply extra payments to principal if you specify it. Even one extra payment per year can shave years off a 30-year mortgage.
Is amortization the same as depreciation?
No. Amortization refers to paying off a loan over time. Depreciation is an accounting concept that spreads the cost of a tangible asset over its useful life. Both reduce a value gradually, but they apply to different things — debt versus asset cost.