Use the free Mortgage Payment Calculator below: your data never leaves your browser — all work happens on your device, and nothing is uploaded to any server. Results are estimates only.
Your mortgage payment is four bills in one
Most first-time buyers focus on one number: principal and interest. But the monthly check you actually write usually includes four parts, known as PITI: principal, interest, taxes, and insurance. The principal repays the loan, the interest pays the lender, the property tax goes to your local authority, and the insurance protects the home. Leave out tax and insurance and your budget will be short by hundreds every month.
Lenders often collect tax and insurance monthly into an escrow account and pay the bills for you once or twice a year. That is why your payment can change even when your loan rate is fixed: if property taxes or insurance premiums rise, the escrow part of your payment rises with them. Understanding all four parts before you buy prevents the most common budgeting surprise in homeownership.
How this calculator works
Enter the home price, your down payment, the interest rate, the term, the annual property tax, and the annual insurance premium. The tool subtracts the down payment to get the loan amount, computes the principal-and-interest payment from the standard amortization formula, divides the annual tax and insurance by twelve, and adds all four parts into one total monthly payment.
For example, a $300,000 home with $60,000 down leaves a $240,000 loan. At 6.5% over 30 years, principal and interest come to about $1,517 a month. Add $300 of monthly tax and $150 of monthly insurance, and the true monthly payment is about $1,967. That gap between $1,517 and $1,967 is exactly what catches unprepared buyers.
How each input moves the payment
A bigger down payment cuts the loan amount, which cuts both the monthly payment and the total interest. A lower rate has a powerful effect too: even half a percentage point can move the payment by more than a hundred dollars a month on a typical loan. A shorter term raises the payment but slashes the total interest, while a longer term does the opposite.
Property tax varies enormously by location, sometimes by a factor of three or more between towns in the same state. Insurance depends on the home’s value, construction, location, and risk factors like flooding. Both are worth researching for the specific property, not guessed from national averages, because they are a permanent part of your payment.
Down payment, equity, and private mortgage insurance
Your down payment is your first slice of ownership, called equity. A 20% down payment is a common benchmark because many lenders drop private mortgage insurance, or PMI, at that level. PMI protects the lender, not you, and it is an extra monthly cost on top of PITI when your down payment is small. This calculator does not add PMI, so if your down payment is below 20%, ask your lender what PMI would add to your payment.
Saving a larger down payment takes longer, but it pays off three ways: a smaller loan, a smaller payment, and possibly no PMI. On the other hand, waiting years to save while prices rise can cost more than the PMI you hoped to avoid. There is no universal right answer; run the numbers for your situation and your market.
Fixed versus adjustable rates
A fixed-rate mortgage locks the principal-and-interest part for the whole term, which makes long-term budgeting simple. An adjustable-rate mortgage starts lower but can rise after an initial period, and the payment rises with it. Adjustable loans can make sense if you plan to move or refinance before the adjustment, but they carry real risk if rates rise and you stay put.
Whatever you choose, test your budget against a higher payment than the one you are quoted. If rates rise, taxes rise, or insurance rises, can you still pay comfortably? A home you can barely afford on day one becomes a burden at the first increase, so leave breathing room in the budget.
Before you commit
Use this calculator to shortlist homes in your real price range, not just the maximum a lender will approve. Lenders approve based on formulas, but only you know your other spending, your job stability, and your plans. Compare several price points, several down payments, and several rates, and pick the combination whose total monthly payment leaves you room for maintenance, savings, and life.
Disclaimer: All results are estimates only and are not financial or tax advice. Check with a qualified professional before making financial decisions.
All results from this calculator are estimates based on the figures you enter. They are not financial or tax advice, and your lender’s final offer governs the real payment.
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