Total Cost of Homeownership: PITI, HOA, and Maintenance
The mortgage calculator gives you a number. The number is wrong — not slightly, but by enough to decide whether you can afford the house. Everything it leaves out arrives anyway, just not on a schedule anyone shows you.
Four things in one payment, and only two of them shrink
A mortgage payment bundles four costs, which is what PITI stands for: principal, interest, taxes and insurance. Principal and interest go to the lender and are fixed for the life of a fixed-rate loan. Property taxes and homeowners insurance are collected alongside them and passed on by the lender through an escrow account.
The distinction that matters is which parts ever stop. Principal and interest end when the loan is repaid. Taxes and insurance never end — you pay them for as long as you own the house, and both tend to rise. 'Paying off the mortgage' does not make housing free.
Two more line items sit outside PITI entirely. HOA dues, if the property has them, are mandatory and can rise by vote. And private mortgage insurance is added when your down payment is under 20% on a conventional loan — it protects the lender, not you, and it's the one item on this list you can remove by building equity.
Taxes, insurance, HOA and maintenance continue after the mortgage is repaid — and generally rise.
The cost that arrives all at once
Maintenance is the line people leave out, because unlike the others it doesn't bill you monthly. A common planning figure is 1–2% of the home's value a year — a rule of thumb rather than a measured constant, and one that trends higher for older properties.
It feels wrong because most months you spend nothing. Then a roof, a furnace or a water heater fails and you spend four figures in a week. The annual average is real; the monthly experience is a long quiet stretch followed by a large bill.
That pattern is exactly why it should be reserved rather than absorbed. A buyer who stretched to the maximum approved mortgage has no room for the reserve, so the first major repair goes onto a credit card — and this is how an affordable house becomes an unaffordable one without the payment ever changing.
Your real monthly cost is PITI plus HOA plus a maintenance reserve of roughly 1–2% of the home's value a year. The parts the mortgage calculator omits are the ones that don't shrink as you pay the loan down.
Sources
- Buying a house: Tools and resources for homebuyers — Consumer Financial Protection Bureau (2026)