Mortgage Calculator
This mortgage calculator turns your home price, down payment, term, and rate into an estimated monthly payment — then layers in property tax, home insurance, PMI, and HOA fees so you can see the full picture, plus a complete amortization schedule showing exactly how each payment chips away at your balance.
Your loan details
Enter the home price, down payment, term, and rate — then add optional housing costs for a fuller monthly estimate.
Result
Add your details
Enter your home price, down payment, term, and rate, then press Calculate to see your estimated monthly payment here.
Estimate only — not financial advice.
This calculator produces an educational estimate based on the figures you enter. It is not a loan offer, pre-approval, or guarantee of terms. Actual rates, taxes, insurance premiums, PMI, and closing costs vary by lender, location, and your financial profile — always confirm the real numbers with a licensed mortgage lender before making a decision.
How the mortgage calculation works
A mortgage is a long-term loan secured by your home — the lender holds a claim on the property until the debt is repaid according to the contract that sets your rate, payment schedule, and the consequences of missing a payment. Underneath the paperwork, the math is a level-payment formula: a fixed monthly amount that, applied at a constant interest rate, brings the balance to exactly zero on the loan's final payment.
The formula behind principal & interest
The calculator first computes your loan amount (home price minus down payment), then applies the standard amortization formula to find the fixed monthly principal-and-interest payment that fully repays that amount, with interest, over the chosen term. Each month, interest is charged on whatever balance remains; the rest of your payment reduces the principal. As the balance shrinks, less of each payment goes to interest and more goes to principal — which is why your equity builds slowly at first and quickly near the end of the loan.
PITI: the four pieces people actually budget for
When people talk about their "monthly mortgage payment," they usually mean PITI — principal, interest, taxes, and insurance. The first two shrink your loan balance directly. The last two often flow through an escrow account managed by your lender, so they land in the same monthly draft even though the money ultimately goes to a county tax office or an insurance company. Add HOA or condo fees on top, and you get a realistic picture of what actually leaves your account each month — which is exactly what this calculator's optional section is for.
Down payments, equity, and PMI
Your down payment is the portion of the price you pay up front rather than finance. A bigger down payment means a smaller loan — which usually means less interest paid overall — but it's worth keeping a cushion for closing costs, moving expenses, and early repairs. On many conventional U.S. loans, putting down less than 20% triggers private mortgage insurance (PMI), an extra monthly cost that protects the lender (not you) until your equity crosses a set threshold. The PMI field here is a simple percentage-of-loan estimate, not a quote — your lender will give you the real figure.
What moves your interest rate
Lenders price loans using market conditions, your credit profile, the loan term, discount points, occupancy type, and how much risk they're taking on. A small difference in rate compounds into thousands of dollars over a 30-year term, which is why comparing the annual percentage rate (APR) — not just the headline rate — across more than one offer is worth the extra hour. This calculator treats your entered rate as fixed for the full simulation; if you're evaluating an adjustable-rate loan, re-run the numbers at each rate the loan could adjust to.
How to read your results — and put them to use
The estimated total monthly payment at the top of your results is the number to compare against your budget — it's the sum of principal & interest plus every optional cost you turned on. The payment breakdown table beneath it shows exactly where that total comes from, so you can see at a glance how much is the loan itself versus taxes, insurance, PMI, and HOA dues.
The loan summary rounds out the picture: your loan amount, how many payments you'll make, the total interest you'd pay over the full term, the total cost of the loan, and a rough payoff date assuming you make every payment on schedule with no extra principal. Total interest is often the most eye-opening figure here — on a 30-year loan it can rival or exceed the amount you originally borrowed, which is exactly why shortening the term or making extra payments can be so powerful.
The amortization schedule is where the math becomes concrete: each row is one monthly payment, showing how much goes to interest, how much reduces your principal, and what balance remains. Early rows skew heavily toward interest; later rows skew toward principal. Use the toggle to expand the full schedule when you want to see exactly when your balance crosses a milestone — say, the point where you'd reach 20% equity and could ask your lender about removing PMI.
A few ways people use this calculator
- Comparing offers. Plug in the rate and term from each lender's quote and compare the total monthly payment and total interest side by side.
- Testing 15 vs. 30-year terms. Re-run the same loan amount and rate at both terms to see the trade-off between a higher monthly payment and dramatically lower lifetime interest.
- Sizing your down payment. Slide the down payment percentage up or down to see how it changes your loan amount, your monthly payment, and whether PMI applies.
- Budgeting the full housing cost. Turn on the optional section to fold in property tax, insurance, PMI, and HOA so the number you see matches what will actually leave your account each month.
Frequently asked questions.
Everything you need to know about how this mortgage calculator works.
- How is a fixed-rate mortgage payment calculated?
- The calculator uses the standard level-payment (annuity) formula. It first works out the regular principal-and-interest amount from the loan amount, the annual interest rate, and the number of monthly payments. It then adds any optional monthly items you include — property tax, home insurance, PMI, and HOA fees.
- What does the amortization schedule show?
- Each row is one monthly payment: interest is applied to the balance at that point in time, the remainder of the scheduled principal-and-interest payment goes toward principal, and the new remaining balance is listed. The schedule reflects only the loan itself — it does not split out escrowed taxes or insurance entered separately.
- Why might my real closing costs differ from this estimate?
- Lenders, counties, and insurers each use their own rules, fees, and rating factors. This calculator is an educational model built on the figures you supply. The final numbers will appear on your loan estimate, closing disclosure, and tax or insurance statements.
- Should I include property tax and insurance in my monthly total?
- If your lender or servicer collects those amounts in an escrow account, counting them as part of your monthly housing payment is reasonable for budgeting. If you pay the taxing authority or insurer directly, you can still add them here for a fuller picture, or leave them out to focus on principal and interest alone.
- How is PMI estimated in this mortgage calculator?
- When you enter an annual PMI percentage, the calculator applies that percentage to your current loan amount and divides the result by twelve for a simple monthly figure. In practice, PMI rates depend on your lender, loan type, and down payment, and PMI is often removable once you reach a certain equity level.
- Does a lower interest rate always mean a better deal?
- A lower rate usually lowers the monthly payment for the same loan size and term, but the better deal for you also depends on discount points, fees, how long you plan to keep the loan, and whether the loan structure fits your other goals — such as paying it off early or keeping cash in reserve for repairs.
- What is the difference between a 15-year and a 30-year mortgage?
- A 15-year loan carries a higher monthly payment but a lower interest rate and dramatically less total interest, because the balance is repaid faster. A 30-year loan spreads the same debt over twice as many payments, which lowers the monthly amount but increases the total interest paid over the life of the loan. Run both terms through the calculator to compare the trade-off in dollars.
- Why is my estimated payment different from my lender’s quote?
- This tool models a fixed annual rate applied evenly across the loan term using rounded, user-supplied figures. Lenders factor in your credit profile, discount points, lender fees, mortgage insurance rules, and local tax and insurance estimates that can shift month to month. Treat this calculator as a planning estimate, not a binding number.
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