How to Read an Amortization Schedule

An amortization schedule shows every loan payment over time. It breaks each payment into principal and interest, then shows the remaining balance after each payment.

Principal vs interest

Principal is the amount that reduces your loan balance. Interest is the lender cost for borrowing money. In the early months of a long loan, a larger share often goes to interest.

Over time, the balance falls, so less interest accrues each month and more of the same payment goes toward principal.

What each row means

A typical schedule includes payment number, payment date, total payment, interest paid, principal paid, and remaining balance.

The final rows should bring the balance close to zero. Small rounding differences can happen because lenders round cents or currency units differently.

• Payment: total amount due for the period.
• Interest: cost charged for that period.
• Principal: amount that reduces balance.
• Balance: loan amount still owed.

How prepayments change the schedule

Extra principal payments reduce the balance sooner. That means future interest is calculated on a smaller amount.

Prepayments usually save the most interest when made early in the loan, because they affect more remaining payments.

Step-by-step summary

1. Find the payment number and date.
2. Compare interest and principal in each row.
3. Watch how interest falls over time.
4. Check the remaining balance after each payment.
5. Model extra payments to estimate interest savings.

Frequently asked questions