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About This Calculator
Generate a complete amortization schedule showing how each payment on a loan is split between principal reduction and interest charges over the entire loan term. In the early years, the majority of each payment goes toward interest, gradually shifting toward principal as the balance decreases. Viewing this schedule reveals exactly when you'll reach key equity milestones in your loan.
Quick Tips
- 1 Early payments go mostly to interest; extra principal payments early on save the most.
- 2 Print your amortization schedule and highlight the month your equity passes 20%.
- 3 Compare total interest paid across different loan terms before choosing one.
Example Calculation
A $200,000 loan at 6.5% for 30 years — payment breakdown analysis.
Monthly payment: $1,264 | First payment: $1,083 interest + $181 principal | Year 1 interest: $12,851
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.
Frequently Asked Questions
Amortization is the process of paying off a loan over time through regular payments. Each payment covers both principal and interest, with early payments being mostly interest and later payments being mostly principal. The amortization schedule shows this breakdown for every payment.
Interest is calculated on the remaining balance. Since the balance is highest at the start, interest charges are largest then. As you pay down principal over time, less of each payment goes to interest and more goes to reducing your balance.
A shorter term means higher monthly payments but dramatically less total interest. A $280,000 loan at 6.75% costs about $374,000 in interest over 30 years versus roughly $131,000 over 15 years, saving you over $243,000.
Yes. By reviewing your schedule, you can see exactly how much principal remains at any point and calculate the impact of extra payments. Making one extra payment per year on a 30-year mortgage can shave off approximately 4-5 years.