Monthly mortgage payment calculator guide
Use this mortgage payment calculator to estimate how much a fixed-rate home loan could cost each month. A complete house payment is usually more than principal and interest: property taxes, homeowners insurance, private mortgage insurance (PMI) and homeowners association fees can materially change the monthly total. The result keeps every cost separate so you can see exactly what is included.
Use figures from an official Loan Estimate whenever possible. Rates, mortgage-insurance premiums, escrow requirements and closing costs vary by loan, property, lender and borrower. This tool is an educational estimate, not a loan offer or approval decision.
How to use this mortgage calculator
- Enter the price and down payment: Use the purchase price and the cash amount you expect to pay toward the price. Closing costs are separate.
- Enter the note rate and term: Use the interest rate shown on a Loan Estimate, not the APR. Select the number of years used to repay the loan.
- Add recurring housing costs: Enter annual property tax and homeowners insurance plus monthly HOA dues. Use local or quoted figures rather than national averages.
- Review mortgage insurance: If the down payment is below 20%, enter a quoted annual PMI rate. The estimate applies that rate until payoff, so treat it as a planning approximation.
- Test extra principal: Optionally enter an amount applied to principal each month to estimate payoff time and interest savings.
Formula and variables
For a fully amortizing fixed-rate loan, the scheduled monthly principal-and-interest payment is calculated from the original principal, monthly interest rate and number of monthly payments. When the annual interest rate is zero, the calculator divides principal evenly across the term.
M = P × [r(1 + r)^n] ÷ [(1 + r)^n − 1]- M — Monthly principal and interest
- The scheduled loan payment before taxes, insurance and other housing costs. (USD/month)
- P — Principal
- Home price minus the down payment. (USD)
- r — Monthly interest rate
- Annual note rate divided by 12. (decimal)
- n — Number of payments
- Loan term in years multiplied by 12. (months)
Worked example: $300,000 home with 20% down
Assume a $300,000 purchase, $60,000 down payment, 6.5% fixed interest rate, 30-year term, $3,600 annual property tax, $1,200 annual insurance and no HOA fee or PMI.
- Loan principal
- $240,000
- Monthly rate
- 0.065 ÷ 12
- Payments
- 360
- Apply the fixed-rate amortization formula to obtain approximately $1,516.96 in monthly principal and interest.
- Add $300 in monthly property tax and $100 in monthly homeowners insurance.
- No PMI is added because the down payment equals 20% in this example.
Result: Approximately $1,916.96 per month
The estimate excludes closing costs, maintenance, utilities and any costs not entered. Principal-and-interest payments over 30 years produce approximately $306,107 in total interest if the loan is held for the full term without extra payments.
Understanding your results
Estimated monthly payment
This combines scheduled principal and interest with the tax, insurance, HOA and estimated PMI amounts entered. Compare the individual lines with page 1 of a Loan Estimate.
Total loan interest
This is interest paid over the estimated payoff period. It does not include closing costs, points, mortgage insurance, taxes or other ownership expenses.
Loan-to-value ratio
Loan-to-value divides the loan amount by the home price. Lenders may instead use an appraised value and apply program-specific rules.
Amortization schedule
Each annual row totals principal and interest paid during that year and shows the estimated ending balance. Early fixed-rate payments generally contain more interest because the outstanding balance is higher.
Assumptions
- The loan has a fixed note rate and fully amortizes with monthly payments.
- Payments are made on time and extra amounts are applied directly to principal.
- Property tax, insurance, HOA dues and the entered PMI rate remain unchanged.
- The home price is used when calculating down-payment and loan-to-value percentages.
Limitations
- The estimate is not a Loan Estimate, credit decision, appraisal or financial recommendation.
- Closing costs, discount points, lender fees, prepaid interest, maintenance and utilities are excluded.
- Actual PMI pricing and cancellation depend on the loan program, servicer, payment history and applicable law.
- Adjustable-rate, interest-only, balloon, biweekly and government-insured loan structures require different assumptions.
- Taxes and insurance can change, so long-term totals for those costs are intentionally not presented.
Common mistakes
- Using APR instead of the mortgage note rate in the payment formula.
- Comparing lender offers with different loan amounts, terms or rate-lock dates.
- Treating a principal-and-interest quote as the complete monthly housing payment.
- Assuming PMI always disappears exactly when current equity reaches 20%.
- Using the maximum lender approval as a personal affordability target.
Practical use cases
Evaluate a home price
Estimate the payment using property-specific taxes, insurance and HOA dues before making an offer.
Check a Loan Estimate
Recreate the principal-and-interest payment and compare each additional monthly charge with the lender disclosure.
Plan extra principal payments
Estimate how a consistent extra amount could change payoff time and total loan interest, then confirm your servicer’s application rules.
Planning and decision guide
Separate the loan payment from the complete housing payment
Principal and interest repay the loan. Property taxes, homeowners insurance, mortgage insurance and HOA dues can materially change the monthly budget, and maintenance and utilities remain outside the mortgage payment.
Compare loan scenarios on matching assumptions
Keep home price, down payment, term, loan type and rate-lock timing consistent when comparing lenders. Review both upfront costs and monthly payment; a lender credit may reduce cash due while increasing the rate.
Use extra payments as a scenario, not a promise
Extra principal can shorten payoff and reduce interest, but it also uses cash that may be needed for emergencies, retirement contributions or higher-cost debt. Confirm servicing instructions and any prepayment terms.
Frequently asked questions
How much will my monthly mortgage payment be?
Your payment depends on the loan amount, note interest rate and loan term, plus property taxes, homeowners insurance, HOA dues and PMI when applicable. Enter those figures above to estimate the complete monthly payment rather than principal and interest alone.
Does this mortgage calculator include taxes and insurance?
Yes. Enter annual property tax and homeowners insurance and the calculator converts them to monthly estimates. These amounts can change and should be taken from local records, quotes or a Loan Estimate.
Should I enter the interest rate or APR?
Enter the note interest rate used to calculate principal and interest. APR includes certain fees and is useful for comparing loan cost, but it is not substituted for the note rate in this payment formula.
How is PMI estimated?
When the down payment is below 20%, the calculator multiplies the loan amount by the annual PMI rate you enter and divides by 12. Actual premiums and cancellation rules vary, so use a lender or insurer quote.
Why can my lender’s payment differ?
A lender may use different tax, insurance, mortgage-insurance, escrow or rounding figures. The loan may also have features this fixed-rate calculator does not model. Compare the inputs with your official Loan Estimate.
Do extra payments always reduce interest?
Extra principal generally reduces the balance used to calculate future interest, but you should confirm there is no prepayment penalty and that the servicer applies the extra amount to principal.
What is a mortgage amortization schedule?
A mortgage amortization schedule shows how payments are divided between principal and interest and how the remaining loan balance changes over time. This calculator provides an annual schedule and includes consistent extra monthly principal payments.
Sources and review
- Loan Estimate explainer — Consumer Financial Protection Bureau. Accessed 2026-07-09.
- Compare and negotiate your loan offers — Consumer Financial Protection Bureau. Accessed 2026-07-09.
- How does paying down a mortgage work? — Consumer Financial Protection Bureau. Accessed 2026-07-09.
- Primary Mortgage Market Survey — Freddie Mac. Accessed 2026-07-09.
Reviewed 2026-07-09.