Cost Of Homeownership Calculator
Your mortgage payment is the headline, not the bill. Property tax, insurance, HOA dues, a maintenance reserve, and utilities stack on top of principal and interest every month, and on the worked example below they add $1,150 a month to the mortgage payment alone. This calculator builds the true monthly cost of owning a home line by line, so the budget you plan is the budget you actually live with.
Estimates only. Tax is computed on the purchase price, not the assessed value, and every input is held fixed for the first year. Blank inputs fall back to the pre-filled defaults, and out-of-range values are clamped: down payment to 0-100%, term to at least 1 year, negatives to zero.
Quick Answer
A $400,000 home with 20% down at 6.75% for 30 years costs $2,075.51 in principal and interest, but the true monthly cost is $3,225.51: $366.67 property tax, $150 insurance, $333.33 maintenance reserve, and $300 utilities on top. That is $38,706.17 a year, a full 55% more than the mortgage payment alone and 24% more than PITI of $2,592.18. Those are the pre-filled values in the tool above, so you can verify the arithmetic yourself before changing anything.
- Quick Answer
- How to use the cost of homeownership calculator
- The true-cost formula
- Worked example: the $400,000 house
- PITI is the payment; the true cost is bigger
- The 1% maintenance rule, explained
- Where the same house costs $600 more a month
- The 0.55% PMI estimate, labelled honestly
- What homeownership cost calculators miss
- Frequently asked questions
- Add This Calculator to Your Website
- References
How to use the cost of homeownership calculator
Enter the price and down payment first, because everything else scales from the loan that remains. Add your rate and term, then the local figures that make or break the budget: property tax rate, annual insurance premium, HOA dues, maintenance reserve rate, and monthly utilities. Press Calculate True Cost and the result appears below the buttons with a line-by-line breakdown and a stacked bar showing where each dollar goes. Nothing is calculated on load, and Reset returns the worked example.
Two habits make the result honest. First, replace the defaults with local figures before you judge a house: the 1.1% tax default is a national middle, not your county’s rate. Second, read the verdict for what it is: it measures how far maintenance and utilities push the total above PITI, in this tool’s own bands of under 15%, up to 30%, and above 30%. It is a warning light about add-ons, not a lender’s affordability ruling.
The true-cost formula
Loan = price × (1 – down payment %). Principal and interest use the standard amortisation formula: monthly payment = loan × r × (1 + r)n ÷ ((1 + r)n – 1), where r is the annual rate ÷ 12 ÷ 100 and n is term in years × 12. At a 0% rate the tool falls back to loan ÷ n, so it never divides by zero. Property tax = price × tax % ÷ 12. Insurance = annual premium ÷ 12. PMI = loan × 0.55% ÷ 12, only when the down payment is under 20%, otherwise zero. Maintenance = price × maintenance % ÷ 12. PITI = principal and interest + tax + insurance + PMI + HOA. True monthly cost = PITI + maintenance + utilities. First-year total = true monthly cost × 12.
To see the loan slice in isolation, our mortgage payment calculator breaks down principal and interest on its own, and our amortization schedule calculator shows how that payment splits between interest and principal over time.
Worked example: the $400,000 house
Price $400,000, 20% down, so the loan is $320,000. At 6.75% over 360 months the principal-and-interest payment is $2,075.51. Tax at 1.1% is $366.67 a month, insurance of $1,800 a year is $150, PMI is $0 at 20% down, HOA is $0, maintenance at 1% is $333.33, and utilities are $300. PITI is $2,592.18, the hidden lines add $633.33, and the true monthly cost is $3,225.51. Over the first year that gap is $7,600 of real spending that no mortgage-only calculator warned you about.
Now change the rate to the market instead of the default. Freddie Mac’s Primary Mortgage Market Survey put the 30-year average at 7.32% for the week ending October 22, 2026, down from 7.40% the week before. At 7.32% the same house costs $2,198.18 in principal and interest and $3,348.18 a month all-in, or $40,178.14 a year. That $122.67 monthly difference is why the default rate deserves a glance before you trust any worked example: it is an illustration, not a quote, and your lender’s rate governs.
PITI is the payment; the true cost is bigger
Lenders quote PITI: principal, interest, taxes, and insurance. It is the number on the Loan Estimate and the number most affordability rules use. But ownership also bills you for upkeep and utilities every single month. On the $400,000 worked example, PITI is $2,592.18, and the true cost adds $633.33 more. Skip those two lines and a house that looks affordable on paper quietly eats the margin you planned to save.
The 1% maintenance rule, explained
The 1% rule says to budget 1% of your home’s value each year for maintenance and repairs: $4,000 a year on a $400,000 home, or $333.33 a month. It is not a prediction that you will spend exactly that; it is a reserve rate that smooths lumpy reality. Roofs, HVAC systems, and water heaters fail on decade-long cycles, and the reserve means a $12,000 roof is a planned withdrawal, not a crisis. Adjust the rate to the house: new construction in a mild climate can run 0.5%, while a century-old home with a pool, septic, or wood siding can push past 2%. Skipping the line entirely is the single fastest route to feeling house poor, which our house budget by percentage calculator will confirm from the income side.
Whatever you do, do not treat a quiet year as savings: the reserve is owed to the future, not freed for the present. And remember what the rule leaves out: it covers wear and replacement, not upgrades, and not the special assessment a condo board can levy for a building-wide project.
Where the same house costs $600 more a month
Tax and insurance rates vary so widely by place that geography can matter more than the floor plan. This illustrative comparison holds the house constant ($400,000, 20% down, 6.75%, 30-year) and varies only the local costs, with every figure computed by the tool itself:
| State profile (illustrative) | Property tax | Insurance | Monthly PITI |
|---|---|---|---|
| Low-tax example (0.6% tax) | $200 | $150 | $2,425.51 |
| National average (1.1% tax) | $366.67 | $150 | $2,592.18 |
| High-tax example (2.2% tax) | $733.33 | $225 | $3,033.85 |
| High-insurance example (coastal, $5,500/yr) | $366.67 | $458.33 | $2,900.51 |
The spread between the cheapest and priciest profile is $608.34 a month for the identical house and loan. High-tax states offset a lack of income tax with property taxes among the nation’s highest, while coastal insurance markets have repriced sharply after recent storm seasons. If you are comparing states, rerun this calculator with local figures rather than trusting a national average, and note that the tax and insurance lines move every year: your servicer collects them through escrow, and when either bill rises, your monthly payment rises with it.
The 0.55% PMI estimate, labelled honestly
Put 10% down on the same $400,000 house and the loan becomes $360,000. The tool estimates PMI at 0.55% of the loan per year, which is $165 a month, lifting PITI to $3,016.62 and the true monthly cost to $3,649.95. That 0.55% is the tool’s planning estimate, and it is the one figure in this article you should replace with a real number before making an offer: your lender’s premium depends on your credit score and loan-to-value ratio, and it appears on your Loan Estimate. What the estimate does usefully show is the scale of the penalty for a small down payment, and the prize for crossing 20% equity, when conventional PMI can generally be requested for cancellation and must be terminated automatically at 22% equity if you are current. If you later refinance, our cost to refinance mortgage calculator prices that move.
One design question is flagged rather than settled here: the tool keeps PMI as a fixed 0.55% estimate instead of an input you can change. Making it an input would change what the tool is, so this rewrite preserves the estimate, labels it everywhere it appears, and leaves the input question for a later decision.
What homeownership cost calculators miss
The standard total-cost calculator sums PITI and stops, which is precisely the blind spot this page exists to fix. The honest gaps that remain even here: closing costs (2% to 5% of the price, paid once in cash), furnishing and move-in costs, special assessments, and the opportunity cost of the down payment. On the other side of the ledger, the costs buy you something rent does not: principal paydown, potential appreciation, and mortgage interest that may be deductible if you itemize, under the rules in IRS Publication 936. The tax tail should never wag the buying decision, but it belongs in the full picture, and this calculator deliberately leaves it out because it depends on your whole return.
Frequently asked questions
PITI plus HOA dues, a maintenance reserve of about 1% of the home's value per year, and utilities. On a $400,000 home with 20% down at 6.75% for 30 years, that totals $3,225.51 a month, versus $2,075.51 for principal and interest alone and $2,592.18 for PITI.
Principal, Interest, Taxes, and Insurance: the four components of the standard mortgage payment. Lenders use PITI, plus HOA dues and PMI where they apply, for affordability checks, but PITI excludes maintenance and utilities, which is why this calculator adds them on top.
The standard rule of thumb is 1% of the home's value per year: $4,000 annually on a $400,000 home, or $333.33 a month. Newer homes can run near 0.5%, while older homes or harsh climates push toward 2%. Budget it monthly so big repairs never become emergencies, and treat a quiet year as money banked for the next roof or furnace, not as savings.
They are a real cost of buying but not of owning month to month, so this calculator excludes them. Budget 2% to 5% of the purchase price in cash at closing, separate from the down payment, and keep that figure out of any monthly comparison.
Yes, while you pay it. With less than 20% down on a conventional loan, PMI is added to PITI. This calculator estimates it at 0.55% of the loan per year when the down payment is under 20%, and that 0.55% is the tool's planning estimate, not your lender's premium, which depends on your credit and loan-to-value ratio. Conventional PMI can generally be requested for cancellation at 20% equity and must be terminated automatically at 22% equity if you are current on payments.
Not necessarily. The monthly true cost often exceeds rent early on, but part of the mortgage payment builds equity, and a fixed payment does not rise while rents usually do. The honest comparison needs a rent-versus-buy analysis over your expected stay, not a single month, and this calculator covers only the owning side of that comparison.
Because this calculator computes property tax on the purchase price as a simplification, while a real bill uses the assessed value set by your local assessor, minus any exemptions you qualify for, such as a homestead exemption. Assessed values lag market prices in some places and track them closely in others, so replace the default tax rate with your county's actual figure before you trust the total.
Closing costs, furnishings and move-in costs, special assessments, the opportunity cost of the down payment, and any appreciation in the home's value. It also holds every input fixed for the first year, so it does not model tax reassessments, insurance repricing, or rate changes on an adjustable loan. Treat the result as a first-year monthly budget, not a lifetime cost.
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References
- Consumer Financial Protection Bureau. What is private mortgage insurance? (PMI required on conventional loans under 20% down; protects the lender, not the borrower). Accessed October 24, 2026.
- Consumer Financial Protection Bureau. CFPB Provides Guidance About Private Mortgage Insurance Cancellation and Termination (Homeowners Protection Act cancellation and termination rights). Accessed October 24, 2026.
- Consumer Financial Protection Bureau. What is an escrow or impound account? (lender collects tax and insurance monthly; payment changes when those bills change). Accessed October 24, 2026.
- Freddie Mac, via GlobeNewswire. Mortgage Rates Decrease to 7.32% (Primary Mortgage Market Survey, week ending October 22, 2026: 30-year fixed 7.32%, down from 7.40%). Accessed October 24, 2026.
- Internal Revenue Service. Publication 936, Home Mortgage Interest Deduction (deductibility rules and debt limits for home mortgage interest). Accessed October 24, 2026.