Quick answer: The true monthly cost of owning is principal and interest, plus property tax, insurance, PMI, utilities and a repair set-aside. In the worked example, $1,450 of principal and interest becomes $2,740 a month, about 46% of $6,000 in take-home pay.
Worked example (made-up numbers)
- Principal and interest: $1,450
- Property tax: $6,240 a year, which is $520 a month
- Home insurance: $2,400 a year, which is $200 a month
- Repair set-aside: $2,400 a year, which is $200 a month
- PMI: $120 a month
- Utilities: $250 a month
The monthly total is $2,740, or $32,880 a year. Use that figure to compare homes against your own budget, not as a safe limit. No single percentage works for everyone.
The lines people leave out
- Tax and insurance. If your loan payment includes escrow, the tax and insurance are already in it. Count them once. The calculator asks for principal and interest on its own.
- Repairs. A repair set-aside turns a future roof or water heater into a monthly line. Without it, the bill arrives all at once. See how to size the set-aside.
- PMI. It can end once your balance reaches the right level. See when you can ask to cancel PMI.
- Utilities. Use your own bills, not a national average. Seasons matter, so use a 12-month average.
Questions people ask
Should I use my total mortgage payment in the calculator?
Use principal and interest only, and enter tax and insurance on their own lines. If your payment includes escrow, the total would count tax and insurance twice.
Is there a safe percentage of income for housing?
There is no single safe percentage. Lenders use ratios when they decide on a loan, but your own budget decides what you can sustain. Compare the monthly total with your take-home pay and your savings goals.
Are utilities the same every month?
No. Use a 12-month average from your own bills, so a hot summer or a cold winter does not throw off the plan.
Where this does not apply
A home bought with cash has no principal, interest or PMI, so those lines drop out. An HOA that covers the roof and exterior may take the repair set-aside out of your number, but the HOA dues then belong on the list. A home with a known large repair, such as a sewer line, should use the actual quote for that repair, not a yearly average. The estimate also leaves out closing costs and any maintenance you do not budget for.
To run your own figures, use the true cost of owning calculator. For what happens to the escrow line, read why your escrow payment went up. Planners and workbooks are on our shop page.
Last reviewed: November 3, 2026.
This article is general educational information, not financial, legal, tax or insurance advice.
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