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True Cost of Homeownership Calculator
The payment your lender quoted is principal and interest. It is not what the house costs. Add property tax, insurance, PMI, HOA, maintenance and utilities and the real number is usually 50–80% higher — and only a small slice of it builds equity.
Educational calculators — always consult a licensed professional before making financial decisions.
Purchase price, before any closing costs.
Enter a dollar amount or a percentage — below 20% and PMI gets added automatically.
$84,000 of home price
Use your quoted rate if you have one.
A 15-year loan costs far more monthly but far less in total.
Lowest monthly payment, most total interest.
Sets your home insurance estimate — the spread across states is roughly tenfold.
Average home insurance $4,142/yr at $300,000 dwelling coverage.
Effective rate on assessed value. Ranges from about 0.3% to 2.2% by state.
$0 if none.
1% is the standard rule of thumb. Older homes run higher.
Electric, gas, water, sewer, trash, internet.
Optional — used to show what share of income this consumes.
True cost of owning, per month
$3,555
Your mortgage payment is only $2,124 of that
The gap most buyers miss
Owning this home costs $1,431 a month more than the mortgage payment you were quoted — 67% on top. Only $304 of the total actually builds equity in year one; the other $3,251 is the cost of occupying the house.
Where every dollar goes
The only line that builds equity. Small early on, and it grows every month as the loan amortizes.
Year-one interest. On a 30-year loan this dominates the payment for roughly the first decade.
At 1.1% of value. Reassessed periodically, so it rises with your home's value — this is not a fixed cost.
Modeled from Texas average rates. Premiums have risen roughly 47% since 2020 — do not assume this line stays flat.
At 1% of value per year. Lumpy in practice — nothing for years, then a $14,000 roof. Deferred, never avoided.
Usually higher than in a rental, because you are heating and cooling more square footage and paying for water, sewer and trash directly.
Share of gross income
30.5%
Stretched
Measured on the all-in cost. Lenders test the mortgage, tax, insurance and PMI only — which is why approved buyers still end up stretched.
Total cost of owning
Holds tax, insurance and HOA flat, which is conservative — all three trend upward.
Your mortgage payment is $2,124, but owning this home costs $3,555 a month — 67% more. That gap is what catches most first-time buyers.
Of that, only about $304 a month actually builds equity in year one. The rest is the cost of occupying the house.
At 30.5% of gross income you are between the 28% comfort guideline and the 36% limit. Workable, but it leaves less room for the maintenance surprises this calculator averages out.
Educational estimate only, not financial advice. Insurance is modeled from Texas state averages unless you overrode it — a real quote will always beat a model. Property tax, insurance and HOA are held flat in the multi-year totals, which understates them. Not included: closing costs, moving, furnishing, or the opportunity cost of your down payment.
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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 78% LTV, 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.
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.
Want to try different numbers?
Back to the calculator ↑Cost ranges and rates here are checked against contractor quotes and published industry data. If a number still looks off, email Support@RealCostIQ.com and we'll review and fix it.