Estimated Monthly Payment Calculator

What an estimated monthly payment includes

A lender's advertised rate is not a payment. A full house payment has four standard parts, and the short name for them is PITI: principal, interest, property taxes and insurance. The CFPB's page on PITI spells out the same four pieces. Principal pays back what you borrowed. Interest is the lender's charge for the money. Taxes and insurance usually go into an escrow account, and the servicer pays those bills when they come due.

Two more charges show up on many homes. Private mortgage insurance, or PMI, applies when you put less than 20 percent down. HOA dues apply in a condo or a neighborhood with an association, and the CFPB notes that association fees are often paid separately from the mortgage.

This calculator adds all five pieces and shows what share of the total each one takes. That matters because two houses with the same price and the same rate can carry payments that differ by hundreds of dollars a month. A house in a high tax county with a $300 HOA is a different purchase than a house down the road with neither.

Use the result as a planning number, not as an approval. A lender builds your real payment from the contract price, your rate lock, the county tax bill and your actual insurance quote. The estimate is here to tell you whether a house fits your budget before you fall in love with it.

The principal and interest part, step by step

Principal and interest is the only piece that comes from a formula. The lender takes your loan amount, your monthly rate and the number of payments, then solves for the payment that clears the balance exactly on the last month. In symbols it looks like this: payment equals loan times monthly rate, divided by one minus (one plus monthly rate) to the negative number of payments.

Two pieces of arithmetic do most of the work. The monthly rate is the annual rate divided by 12, so 7.32 percent becomes 0.0061. The number of payments is the term in years times 12, so 30 years becomes 360.

Here is the first step with real numbers. A house priced at $417,500 with 10 percent down gives a loan of 417,500 x 0.90 = 375,750. At 7.32 percent, the payment on that loan comes to $2,581.14 a month.

Almost all of the early payment is interest. In month one the lender charges 375,750 x 0.0061 = 2,292.08 in interest, and only 2,581.14 - 2,292.08 = 289.06 goes to the balance. By the final year the split reverses: interest runs about $1,194 for the year and principal gets about $29,780. That slow flip is why a 30-year loan builds equity so slowly at the start.

The figure below plots that split for the whole term. The two lines cross near the middle of year 22, which is when the monthly payment finally sends more to principal than to interest.

Property tax, insurance and HOA are estimates, not quotes

Three of the five lines have nothing to do with your credit score. They depend on where the house sits and what it costs to rebuild.

Property tax is set by the county, the school district and sometimes the city. Nationwide, owners paid a median of about 0.89 percent of home value in 2024, based on the Census Bureau's American Community Survey. The spread is wide: New Jersey runs near 1.9 percent while Hawaii sits under 0.3 percent. On a $417,500 house, 0.89 percent works out to 417,500 x 0.0089 = 3,715.75 a year, and 3,715.75 / 12 = 309.65 a month.

Home insurance depends on the dwelling coverage, the roof age, the deductible and the disaster risk in your county. The average HO-3 policy cost $1,569 in 2022, according to the NAIC, and the same regulator's 2026 market review found premiums up 18.3 to 43.3 percent after inflation between 2018 and 2024. Coastal wind zones, hail belts and wildfire areas sit far above the national figure. Get a quote with the address before you trust any estimate, including this one.

HOA dues are set by the association's budget. The Census Bureau put the median condo or HOA fee at $135 a month in 2024, with about 21.6 million households paying one. Median is not typical for a given neighborhood: a gated community with a pool and a clubhouse can run $400 or more, and special assessments for a new roof or a repaved lot land on top of the monthly fee.

The last row is a useful sanity check. The Census Bureau's 2024 estimate for the median monthly cost of an owner-occupied home with a mortgage, including utilities and fees, was $2,035. If your estimate lands far above that for a median-priced house in a low-tax county, one of the inputs is probably off.

PMI: the line item that ends

Private mortgage insurance protects the lender, not you. It shows up when the down payment is under 20 percent, and the premium scales with the loan amount and the borrower's credit score. The Urban Institute's rate table runs from 0.46 percent a year for scores of 760 and up to 1.50 percent for scores between 620 and 639.

The math for the middle row: 375,750 x 0.0070 = 2,630.25 a year, and 2,630.25 / 12 = 219.19 a month. That is $2,630 a year for insurance that pays your lender if you default.

The good news is that PMI has an end date written into federal law. Under the Homeowners Protection Act, you can ask the servicer to cancel PMI once the balance is scheduled to reach 80 percent of the original value, and the servicer must end it automatically at 78 percent. The CFPB's PMI cancellation page lists the conditions: a written request, a good payment history, no second lien and evidence that the home has not lost value.

With 10 percent down at 7.32 percent, the balance reaches 78 percent of the original price in month 119, just under ten years. Paying extra principal moves that date closer. On this loan, every $1,000 of extra principal in year one also removes about $7 a year of PMI, on top of the interest saved.

Full example: a $417,500 house with 10 percent down

Put the pieces together at today's numbers. The price is the September 2026 national median existing-home price of $417,500 from the National Association of Realtors. The rate is the Freddie Mac average of 7.32 percent for the week of October 22, 2026. The buyer puts 10 percent down and has a credit score in the 720 to 739 band.

The down payment is 417,500 x 0.10 = 41,750, so the loan is 375,750. The first year of payments totals 3,444.98 x 12 = 41,339.76. Over five years the same payment adds up to 3,444.98 x 60 = 206,698.80, and the balance only falls to $354,882.55. Of that five-year spend, $134,001.06 is interest.

Notice how much of the payment has nothing to do with the loan. Tax, insurance, PMI and HOA come to $863.84 a month, which is 25.1 percent of the total. A buyer who shops only on the principal and interest figure will underestimate the monthly cost by a quarter.

What changes with 20 percent down

The same house with 20 percent down removes PMI and shrinks the loan. The down payment becomes 83,500, the loan becomes 334,000, and the principal and interest payment drops to $2,294.35 at the same rate and term. Tax and insurance do not change, because the county and the insurer do not care how you financed the purchase.

The monthly difference is 3,444.98 - 2,939.00 = 505.98, or $6,071.76 a year. The extra $41,750 at closing buys that $505.98 a month, which works out to a 14.5 percent annual return on the extra cash while the loan is young. That is a strong return, but it assumes the buyer has the cash left over after an emergency fund and closing costs.

Term length matters as much as the down payment. A $280,000 loan at 6.68 percent for 15 years carries a principal and interest payment of $2,466.89. Add $259.58 of tax and $200 of insurance and the total is $2,926.47. That is close to the 20 percent down, 30-year payment above, with a much faster payoff and no PMI.

Costs the monthly payment does not include

A monthly estimate answers one question. Plenty of other bills arrive in the first year, and a budget that ignores them feels fine on paper and tight in March.

• Closing costs. Lender fees, title insurance, appraisal, recording and prepaid escrow usually land between 2 and 5 percent of the loan amount. On a $375,750 loan that is $7,515 to $18,787.50.
• Utilities. The Census owner cost figure of $2,035 a month includes utilities, so a payment comparison that stops at PITI is not apples to apples.
• Maintenance. A common rule of thumb sets aside 1 percent of the home value a year, which is $4,175 on this house.
• HOA special assessments. A new roof or a lawsuit settlement can add a one-time bill of several thousand dollars.
• Escrow changes. If the county raises your assessment or the insurer raises your premium, the servicer recalculates the escrow share and the payment can jump even though the loan terms did not change.

Two of these deserve a closer look before you buy. Ask the seller for the last two years of tax bills, not just the current one, because a recent sale often triggers a reassessment that raises the bill in the first year of ownership. And read the HOA's reserve study if it has one, since an association that is underfunded tends to solve the problem with a special assessment.

How to check the estimate against a real Loan Estimate

Once you are under contract, the lender has three business days to send a Loan Estimate. Page one has a section called Projected Payments that lists principal and interest, mortgage insurance, estimated escrow and the total. Put those four numbers beside the ones from this page and the gaps will tell you what to fix.

Three checks catch most surprises. First, compare the loan amount, since a seller credit or a different down payment changes it. Second, compare the escrow figure: the lender may use the current tax bill, while your county may reassess at the purchase price. Third, confirm whether PMI is borrower paid and listed on page one, or lender paid through a higher rate, which hides the cost inside the interest rate instead of showing it as a separate line.

The Freddie Mac weekly rate survey is a reasonable stand-in for the rate you will be offered with excellent credit and 20 percent down. Most buyers pay a little more than the survey average, because points, closing cost credits and condo or investment property pricing all move the number. If your quoted rate is a full point above the survey in the same week, ask the loan officer to walk through the pricing.

Run the calculator with the Loan Estimate numbers before you sign. A payment that fits at 6.5 percent may not fit at 7.5 percent, and the escrow line is the piece most likely to move between the estimate and the first real payment.