Amortization Calculator

Generate a detailed amortization schedule showing how each payment splits between principal and interest over the life of your loan.

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Total amount being borrowed.

%

Annual fixed interest rate on the loan.

Length of the loan in years.

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What Is an Amortization Schedule?

An amortization schedule is a detailed table showing every payment over the life of a loan, broken down into principal and interest components. Each row represents one payment period and displays the payment amount, how much goes to interest, how much reduces the principal, and the remaining balance. This schedule provides a clear roadmap of your loan payoff, letting you see exactly when your loan will be paid in full and how much total interest you will pay.

How Principal and Interest Change Over Time

In the early years of a fully amortized loan, the majority of each payment goes toward interest because the outstanding balance is at its highest. As you make payments and the balance decreases, the interest portion shrinks and more of each payment goes toward reducing the principal. On a 30-year, $280,000 mortgage at 6.75%, your first payment allocates roughly $1,575 to interest and only $240 to principal, but by year 20, the split reverses dramatically.

Impact of Loan Term on Amortization

The length of your loan term significantly affects both your monthly payment and the total interest paid. A shorter term means higher monthly payments but dramatically less total interest. For example, a $280,000 loan at 6.75% costs approximately $374,000 in total interest over 30 years, compared to about $131,000 over 15 years. Choosing a 15-year term saves over $243,000 in interest, though the monthly payment increases by roughly $700.

Using Amortization to Plan Extra Payments

Your amortization schedule is a powerful tool for planning extra payments. By reviewing the schedule, you can see exactly how much principal remains at any point and calculate how an extra payment would accelerate your payoff. Making one additional payment per year on a 30-year mortgage can reduce the term by approximately 4-5 years. You can also target specific milestones, such as paying off the loan before retirement, by determining the exact extra amount needed each month.

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