What you'll need
- Home price, down payment, and your quoted rate
- Your state — it sets the insurance estimate
- Your county's effective property tax rate
- HOA fee, if any, and a rough utilities figure
What you'll get
- One all-in monthly number — Everything, not just PITI
- Every line itemized — With its share of the total
- What actually builds equity — Usually about 10% of the total
- 5- and 10-year cost of owning — The number nobody shows you
Why your approval letter understates what you'll pay
Lenders qualify you on PITI — principal, interest, taxes and insurance — plus HOA where it applies. Maintenance and utilities are real, unavoidable, and entirely absent from that test, because they are not contractual obligations a lender can verify.
So the number you were approved against was never the number you would actually pay. That is the whole reason comfortably-approved buyers end up feeling house-poor, and it is why this calculator exists.
The four lines people leave out
- Maintenance. The most commonly zeroed line and the least avoidable. One percent of value a year is the standard rule of thumb — about $350 a month on a $420,000 home. It is lumpy rather than smooth: nothing for three years, then a water heater, then a $14,000 roof. Budgeting monthly is how you avoid financing that on a credit card.
- Insurance, rising. Premiums are up roughly 47% since 2020. Treating this as a fixed line is how escrow shortfall letters surprise people. Estimate yours properly.
- Property tax, reassessed. Your assessment usually resets to your purchase price after you buy, so the seller's old tax bill understates yours — sometimes badly, in a market that has run up.
- Utilities. Almost always higher than in a rental: more square footage to heat and cool, plus water, sewer and trash that a landlord used to absorb. Ask the seller for twelve months of actual bills.
How little of it builds equity
On a 30-year loan at current rates, roughly a fifth to a quarter of your principal-and-interest payment goes to principal in year one. Measured against the all-in cost of owning, the share that builds equity is closer to a tenth. That proportion improves every month as the loan amortizes — but it is the main reason short holding periods rarely work out, and why selling costs of 8–10% can wipe out several years of equity building.
How we calculate this
- Principal, interest and PMI come from the same engine as our mortgage and PMI calculators, so the numbers agree across the site.
- Insurance is modeled from published state averages, assuming rebuild coverage at 80% of purchase price — land is not insured. Override it with a real quote if you have one.
- Property tax is your entered rate applied to the purchase price.
- Maintenance is a percentage of home value, defaulting to the 1% rule of thumb.
- PMI drops out of the multi-year totals at the month the balance reaches 80% of the purchase price, when you can ask the lender to cancel it (if you don't, the Homeowners Protection Act ends it automatically at a scheduled 78%), so those figures are not a flat multiplication.
- Tax, insurance and HOA are held flat in the 5- and 10-year totals. That is deliberately conservative — all three trend upward.
Everything runs in your browser; nothing you enter is sent anywhere. Not included: closing costs, moving, furnishing, or the opportunity cost of your down payment.
The mortgage payment is roughly two-thirds of what owning costs. Add property tax, homeowners insurance, mortgage insurance, maintenance at an estimated 1%–2% of value a year, utilities, and any HOA dues, and the real monthly number typically lands 30%–50% above principal and interest alone.
Everything the payment quote leaves out
Lenders qualify you on PITI — principal, interest, taxes, and insurance — which is genuinely more honest than the payment figure in a listing, and still incomplete. PITI ignores maintenance entirely, and maintenance is the line that does not stop when the loan is paid off.
| Line | Typical monthly | Basis |
|---|---|---|
| Principal & interest at 7.40% | $2,770 | amortization, 30-yr |
| Property tax | $183–$733 | 0.5%–2.0% of value a year |
| Homeowners insurance | ~$255 | $3,057 projected 2026 average |
| PMI (under 20% down) | $167–$500 | 0.5%–1.5% of loan a year |
| Maintenance reserve | $367–$733 | 1%–2% of value a year |
| Utilities | $250–$450 | varies by size, climate, and rates |
Arithmetic on the stated rates and ranges. Property tax and insurance vary enormously by state; the mortgage payment is the only line that is genuinely fixed.
Two of those lines rise every year without asking. Property assessments and insurance premiums are re-evaluated annually and your servicer adjusts the escrow portion of the payment to match — which is why a payment that rises by a hundred dollars at the annual escrow analysis is normal rather than an error.
Maintenance: the line people skip
The 1%–2%-of-value rule is the standard guidance, and it deserves an honest caveat: it is a rule of thumb, not a measured statistic. What makes it useful is not precision but timing. Maintenance does not arrive monthly — it arrives as a water heater in year three and a roof in year twelve, and the households that struggle are the ones that budgeted zero because nothing broke in year one.
- ·Roof — 20–30 years for asphalt, then $10,000–$25,000.
- ·HVAC — 15–20 years, then $3,500–$12,000 depending on system and efficiency.
- ·Water heater — 8–12 years, and it usually announces itself by flooding something.
- ·Exterior paint or siding — every 5–10 years for paint.
Set the reserve up as an automatic monthly transfer to a separate account. Treating it as a bill you pay yourself is the difference between a planned expense and a credit-card balance. The Home Maintenance Calculator prices a schedule for your specific house rather than a percentage.
Property tax and insurance: the geography tax
These two lines explain most of why the same house costs wildly different amounts to own in different states. Effective property tax rates on owner-occupied housing run from roughly 0.3% to just over 2% of value depending on the state (Tax Foundation) — on a $440,000 home, a spread of well over $7,000 a year between the extremes.
Insurance has been the faster-moving line. Insurify projects an average annual homeowners premium near $3,057 for 2026, and the state spread is wide enough that in the most exposed markets premiums have become a decisive factor in affordability rather than a footnote. Our insurance by state guide has the state-level detail; the Property Tax Calculator handles the other half.
On the tax side there is a partial offset if you itemize: state and local taxes, including property tax, are deductible up to $40,400 for 2026 per the IRS, reduced above $505,000 of modified AGI. Most households take the standard deduction and get nothing, so treat any deduction as a bonus rather than a plan.
Year one is the expensive year
Beyond the recurring stack, the first twelve months carry costs nobody quotes: closing costs of 2%–5% of the price, moving, immediate repairs the inspection found, window coverings and appliances the previous owner took, and the tools and equipment a house needs that an apartment did not.
- ·Cash to close — down payment, closing costs, earnest money, and reserves, worked at $300k/$400k/$500k.
- ·Hidden costs of buying — the line items that surprise first-time owners.
- ·Renovation costs — if the house needs work, price it before the offer rather than after.
The practical test before buying is not whether you can make the payment. It is whether you can make the payment, fund the maintenance reserve, and still absorb a $5,000 surprise in the same year. If the answer is no, the house is more expensive than it looks — regardless of what the lender approved.
Methodology
Monthly figures are arithmetic on the stated rates: principal and interest from the amortization formula at Freddie Mac's PMMS 30-year average for the week of October 8, 2026; property tax from the Tax Foundation range of effective rates; insurance from Insurify's projected 2026 average, which is a projection and labeled as one; PMI from the typical 0.5%–1.5% conventional band. The 1%–2% maintenance figure and the component lifespans are industry rules of thumb, not measured averages. SALT deduction figures are the IRS's 2026 limits. All figures are national; your state changes them materially.
Sources
- Freddie Mac — Primary Mortgage Market Survey — accessed 2026-07-29
- Tax Foundation — Property Taxes by State and County, 2026 — accessed 2026-07-29
- IRS — 2026 state and local tax deduction limit — accessed 2026-07-29
- CFPB — What fees or charges are paid when closing on a mortgage? — accessed 2026-07-29
- NAR — Existing-Home Sales, June 2026 — accessed 2026-07-29
Work through the pieces
- Mortgage Calculator — payment and amortization on its own
- Affordability Calculator — what a lender will approve
- Home Insurance Cost Calculator — the fastest-rising line
- Property Tax Calculator
- PMI Calculator — cost and removal timing
- Home Maintenance Calculator — what the 1% actually buys
- Closing Costs Calculator — the cash to get in
- Cost to Sell Calculator — the cash to get out
- Rent vs. Buy Calculator
- SALT Deduction Calculator — what you get back at tax time
Frequently asked questions
What is the true cost of owning a home per month?
Typically 50% to 80% more than the mortgage payment you were quoted. The quoted payment is principal and interest only. On top of that sit property tax, home insurance, private mortgage insurance if you put down less than 20%, any HOA fee, maintenance at roughly 1% of the home's value each year, and utilities that are usually higher than they were in a rental. On a $420,000 home, a $2,100 mortgage payment commonly becomes $3,400 to $3,800 all in.
Why doesn't my lender include maintenance and utilities?
Lenders qualify you on PITI — principal, interest, taxes and insurance — plus HOA where it applies. Maintenance and utilities are real and unavoidable but are not part of the underwriting test, because they are not contractual obligations the lender can verify. That gap is precisely why buyers who were comfortably approved still end up feeling stretched: the number they were approved against was never the number they would actually pay.
How much should I budget for home maintenance?
One percent of the home's value per year is the long-standing rule of thumb and holds up reasonably for a mid-age home in decent condition — about $350 a month on a $420,000 house. Use 1.5% to 2% for a home over 40 years old or one with known deferred work. The important thing is that it is lumpy rather than smooth: nothing for three years, then a water heater, then a roof. Budgeting monthly is how you avoid financing those on a credit card.
How much of my mortgage payment actually builds equity?
Far less than most people expect in the early years. On a 30-year loan at current rates, roughly 20% to 25% of the first year's principal-and-interest payment goes to principal — the rest is interest. Measured against the all-in cost of owning, the share that builds equity is smaller still, often around 10%. That proportion improves every month as the loan amortizes, and it is the main reason short holding periods rarely work out financially.
What percentage of income should housing be?
The traditional guidance is that housing should stay under 28% of gross income and total debts under 36%. Worth knowing is that lenders apply those thresholds to PITI, not to the all-in figure. Measuring the same ratios against your true all-in cost is a stricter and more honest test — and if the all-in number pushes you past 36%, you are more exposed than your approval letter suggests.
Does this include closing costs and the down payment?
No — this models the ongoing monthly cost of owning, not the cash needed to buy. Closing costs typically run 2% to 5% of the purchase price on top of your down payment, and moving and furnishing are separate again. The calculator also does not price the opportunity cost of the down payment, which is the return that money could have earned had it not gone into the house.
How much more than the mortgage payment does a house really cost?
Typically 30% to 50% more than principal and interest alone. On a $440,000 home with a $400,000 loan at 7.40% (Freddie Mac, week of October 8, 2026), principal and interest is about $2,770, with property tax, insurance, PMI, maintenance and utilities adding roughly $1,200 to $2,600 a month depending on your state and the age of the house.
Why did my mortgage payment go up if I have a fixed rate?
The principal and interest portion never changes; the escrow portion does. Property tax assessments and homeowners insurance premiums are re-evaluated annually and your servicer adjusts the payment to match. A payment rising at the annual escrow analysis is normal, not an error — and it is why fixed-rate payments still drift upward.