Cost to Own a Home Calculator
Your mortgage payment is only part of the story. See the true total monthly cost of owning this home.
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True Total Monthly Cost
$3,101/mo
$37,206/yr
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Last updated: August 17, 2026 · Reviewed by the DoCalc team
Why Your Mortgage Payment Isn't the True Cost
A mortgage payment (even a full PITI figure with taxes and insurance) still leaves out two real, recurring costs that catch many first-time buyers off guard: routine maintenance and utilities. Renters typically don't budget for a new water heater or annual gutter cleaning — homeowners do, whether they plan for it or not. This calculator adds those pieces in for a genuinely complete monthly picture.
The Formula
The maintenance reserve uses a common rule of thumb — budgeting roughly 1% of home value per year for routine upkeep — as a starting estimate. Actual maintenance costs vary by home age, condition, and climate; older homes and harsher climates often run higher.
Worked Example
A $400,000 home, 20% down at 6.75%, with 1.1% property tax, $1,500/yr insurance, no HOA, 1% maintenance reserve, and $200/mo utilities: $2,076 P&I + $367 tax + $125 insurance + $333 maintenance + $200 utilities = $3,101/month, or $37,206/year — a meaningfully bigger number than the $2,076 mortgage payment alone suggests.
What Renters Don't Budget For
- Maintenance and repairs — from routine (HVAC servicing, gutter cleaning) to unexpected (a failed water heater, roof repair).
- Higher utility costs — often higher than a comparable rental, especially for larger homes or older, less-efficient systems.
- HOA dues — where applicable, on top of the mortgage and taxes.
- Capital expenditures — a new roof, HVAC replacement, or major system failure isn't covered by a landlord anymore.
Pros and Cons of Knowing the True Cost
Pros: a realistic monthly number prevents the common mistake of budgeting only against the mortgage payment and being surprised by real ownership costs.
Cons: it's still an estimate — actual maintenance costs are lumpy (a big year, then several quiet years), not a smooth monthly average, so building an actual reserve fund matters more than the average implies.
Who Should Use This Calculator
Use it if you're deciding whether you can truly afford a home, beyond just qualifying for the mortgage. Pair it with the Rent vs. Buy Calculator to compare this true cost against your current rent.
Frequently Asked Questions
What's a reasonable maintenance budget for a home?
1% of home value per year is a commonly cited starting rule of thumb, though older homes, larger homes, and homes in harsher climates often run higher — some guidance suggests 1-4% depending on age and condition.
Does this include mortgage principal, or just interest?
It includes the full principal & interest (P&I) payment, since that's the actual cash leaving your account each month, on top of taxes, insurance, HOA, maintenance, and utilities.
Why is my true cost so much higher than my mortgage payment?
A basic mortgage payment often only reflects principal and interest. This calculator adds property tax, insurance, HOA, a maintenance reserve, and utilities — pieces that add up to a meaningfully larger real monthly cost.
Should I actually save the maintenance reserve amount every month?
Many financial advisors recommend exactly that — setting aside the estimated monthly maintenance amount in a separate account, so funds are available when an actual repair or replacement is needed, rather than treating it as a surprise expense.
Does this calculator account for home insurance rate increases?
No — it uses your current annual insurance estimate as a static input. Insurance costs, like property tax, can rise over time and are worth revisiting periodically, especially in areas with rising climate-related risk.
How is this different from a basic mortgage calculator?
A basic mortgage calculator (or even a full PITI calculator) typically stops at principal, interest, taxes, and insurance. This one adds maintenance and utilities for the most complete monthly cost-of-ownership picture.