Introduction
A mortgage amortization calculator shows you exactly how each monthly payment is split between principal and interest over the life of your loan. When you take out a mortgage, most of your early payments go toward interest. Over time, more of your payment goes toward paying down the actual loan balance. This tool helps you see that shift clearly.
Enter your loan amount, interest rate, and loan term to get a full payment schedule. You can also add an extra monthly payment to see how much interest you could save and how many years sooner you could pay off your home. The calculator gives you a month-by-month breakdown, easy-to-read charts, and a side-by-side comparison so you can make smart choices about your mortgage.
It also finds your tipping point, the exact month when more of your payment starts going toward principal than interest. This is a key milestone that many borrowers want to know but rarely see in simple calculators.
How to Use Our Mortgage Amortization Calculator
Enter your loan details below to see your monthly payment, total interest, payoff date, and a full breakdown of every payment over the life of your loan.
Loan Amount: Type the total amount of money you are borrowing. This is the price of the home minus your down payment.
Annual Interest Rate: Enter the yearly interest rate on your mortgage. You can find this on your loan estimate or lender quote.
Extra Monthly Principal Payment: If you plan to pay extra each month toward your loan balance, enter that amount here. Leave it at $0 if you do not plan to make extra payments.
Loan Term: Pick how many years you have to pay back the loan. Choose from 10, 15, 20, or 30 years.
Loan Start Month: Select the month your first mortgage payment begins.
Loan Start Year: Select the year your first mortgage payment begins.
Click the Calculate button to see your results. Click Reset to clear your entries and start over.
What Is Mortgage Amortization?
When you take out a mortgage to buy a home, you pay it back in monthly payments over many years. Each payment is split into two parts: principal and interest. Principal is the actual loan amount you owe. Interest is the fee the bank charges you for borrowing the money.
An amortization schedule shows you exactly how each payment is divided between principal and interest, month by month, until the loan is fully paid off. In the early years of your mortgage, most of your payment goes toward interest. Over time, that shifts, and more of your payment goes toward paying down the principal. This shift happens at a point called the tipping point.
How Extra Payments Help
If you pay extra money each month on top of your regular payment, that extra amount goes straight toward your principal. This means your loan balance drops faster, you pay less total interest, and you pay off your mortgage sooner. Even small extra payments, like $50 or $100 a month, can save you thousands of dollars and shave years off your loan. You might also consider switching to biweekly payments, which effectively adds an extra monthly payment each year.
Key Mortgage Terms to Know
- Loan Amount: The total amount of money you borrow from the lender.
- Interest Rate: The yearly percentage the lender charges you on the remaining balance.
- Loan Term: How long you have to pay back the loan, usually 15 or 30 years.
- Monthly Payment (P&I): Your fixed monthly payment that covers principal and interest.
- Total Interest: The full amount of interest you pay over the entire life of the loan.
- Remaining Balance: How much you still owe on the loan at any given time.
- Equity: The portion of your home you actually own, equal to your home's value minus what you still owe.
Choosing the Right Loan Term
A 30-year mortgage gives you lower monthly payments, but you pay much more interest over time. A 15-year mortgage has higher monthly payments, but you pay far less interest and own your home sooner. A 10-year or 20-year term falls somewhere in between. The best choice depends on what monthly payment fits your budget.