What is an amortization schedule?

An amortization schedule is a table showing each loan payment broken down into principal and interest portions, along with the remaining balance after each payment.

Why are early loan payments mostly interest?

Interest is charged on the outstanding balance. Early on, the balance is highest so more of each payment goes to interest. As principal decreases, less interest accrues each month.

How do extra principal payments affect the schedule?

Extra payments directly reduce the principal balance, which reduces future interest charges. This shortens the loan term and can save substantial amounts in total interest paid.

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Understanding Amortization

An amortization schedule shows exactly how each loan payment is divided between interest and principal reduction. Early payments are mostly interest; later payments shift toward principal. This calculator produces the complete schedule so you can see your balance at any point in the loan. To quickly find just the monthly payment, use our Payment Calculator.

Making extra principal payments early in the loan has the greatest impact on total interest paid, since it reduces the balance on which interest accrues. If you're considering refinancing to get a better rate, our Refinance Calculator can show you the potential savings.

Understanding your amortization schedule is a key part of smart debt management and helps you plan extra payments strategically.

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For a related calculation, use Refinance Calculator to compare current vs. new loan terms to calculate monthly savings and break-even point. Alternatively, use Payment Calculator to calculate monthly loan payments using standard amortization formula for any loan amount and term.

For the underlying method, read How to Calculate a Mortgage Payment: Principal, Interest, and the Real Monthly Cost or How to Read an Amortization Schedule and Save Interest with Extra Principal.