Mortgage Calculator

How to Use This Mortgage Calculator

This mortgage calculator gives you a complete picture of what your home loan will actually cost each month and over its full lifetime. Start by entering the home price and your down payment. You can toggle the down payment between a percentage of the home price and a fixed dollar amount using the button next to the field. Choose your loan term from the dropdown: fifteen, twenty, or thirty years. Then enter the annual interest rate your lender has quoted.

Unlike a basic loan calculator, this tool also factors in property tax and home insurance, which are part of your real monthly housing cost. Enter your annual property tax and annual home insurance premium, and the calculator automatically divides them by twelve and adds them to your monthly payment. The result you see is the full PITI payment: principal, interest, taxes, and insurance, which is the number your lender uses to qualify you for the loan.

If you plan to make extra payments toward the principal each month, enter that amount in the optional extra payment field. The calculator will show you how much interest you save and how many months earlier the loan is paid off. Even a modest additional payment, such as fifty or a hundred dollars per month, can save tens of thousands of dollars over the life of a thirty-year mortgage. Every result updates the moment you change a number, so you can quickly compare different scenarios without pressing any button.

Reading the Results

• Monthly Payment: the total monthly amount including principal, interest, property tax, and insurance. The breakdown below shows each component.
• Payment Breakdown chart: the donut chart visually splits your monthly payment into P&I, tax, and insurance so you can see where the money goes.
• Term Comparison: see how your chosen term compares with the alternative. A fifteen-year mortgage has a higher monthly payment but saves substantially on total interest.
• Amortization Schedule: shows month-by-month how each payment is split between principal and interest, and how the balance decreases over time.
• Savings card: appears when you enter an extra monthly payment, showing the total interest saved and months shaved off the loan.

Understanding Your Mortgage Payment

A mortgage payment is often described with the acronym PITI, which stands for principal, interest, taxes, and insurance. Understanding each component helps you budget accurately and compare loan offers on a level playing field. The principal portion of each payment reduces the amount you actually owe on the loan. Interest is the cost the lender charges for lending you the money, calculated on the remaining balance each month. Because interest is charged on a declining balance, early payments are heavily weighted toward interest, and later payments put more money toward principal.

Property tax is levied by your local government based on the assessed value of the property. Tax rates vary widely by state and county, ranging from well under one percent to over two percent of the home value per year. Most lenders collect one-twelfth of the annual tax with each monthly mortgage payment and hold it in an escrow account, paying the tax bill on your behalf when it comes due. Home insurance protects you and the lender against damage to the property from fire, storms, theft, and liability. Your premium depends on the home value, location, construction, and the coverage level you choose.

Private mortgage insurance, or PMI, is typically required if your down payment is less than twenty percent of the home price. PMI protects the lender, not you, in case you default. It usually costs between 0.5 and 1.5 percent of the loan amount per year and can be removed once you reach twenty percent equity. This calculator does not include PMI, but you can approximate its effect by adding the monthly PMI cost to the insurance field or to your total budget separately. When comparing loan offers, always look at the full PITI payment, not just the principal and interest, to get an accurate picture of your true monthly cost.

15-Year vs 30-Year Mortgage

Choosing between a fifteen-year and a thirty-year mortgage is one of the biggest financial decisions a homebuyer makes. A thirty-year mortgage has lower monthly payments, which makes it easier to qualify and leaves more room in the budget for other expenses or investments. However, the longer term means you pay interest for twice as long, and the total interest paid over the life of the loan is dramatically higher. On a $240,000 loan at 6.5 percent, a thirty-year mortgage costs roughly $306,000 in total interest, while a fifteen-year mortgage costs roughly $126,000, a saving of about $180,000.

A fifteen-year mortgage typically comes with a lower interest rate, often 0.25 to 0.75 percent less than a thirty-year rate. The monthly payment is significantly higher, but you build equity much faster and own the home outright in half the time. This can be a powerful strategy if you are close to retirement and want to eliminate housing debt, or if you can comfortably afford the higher payment and prefer guaranteed savings over market-rate investment returns.

There is a middle path: take a thirty-year mortgage for the lower required payment and the flexibility it provides, then make extra payments as if you had a fifteen-year term. This approach gives you the safety net of a lower minimum payment during tight months while still accelerating payoff when cash flow allows. Use the extra payment field in this calculator to model that scenario and see the exact savings. The term comparison section above automatically shows how your current term stacks up against the alternative, making it easy to weigh the trade-offs in real dollars.