How Much House Can I Actually Afford?
A lender will tell you the maximum you qualify for. That number and the number you should actually spend are frequently very different — and confusing the two is one of the most common ways buyers end up house-poor.
Qualification is a ceiling, not a target
Lenders typically use debt-to-income (DTI) ratios to determine your maximum loan size — commonly allowing total housing costs plus other debt up to somewhere around 43–50% of gross monthly income, depending on the loan program. That's a ceiling built around what you can technically repay without defaulting, not a number designed around your actual quality of life.
A more honest starting point
A widely used, more conservative guideline is the 28/36 rule:
- 28% — Keep your total housing payment (principal, interest, taxes, insurance, HOA) at or below 28% of your gross monthly income.
- 36% — Keep your total debt payments, housing included, at or below 36% of gross monthly income.
These aren't hard laws — they're a sanity check. If a lender is willing to approve you well past these numbers, that's a sign the "maximum" and the "comfortable" are diverging, not a sign you should stretch to meet it.
What the ceiling number tends to leave out
- Maintenance and repairs. A rough rule of thumb is budgeting 1–2% of the home's value per year for upkeep — a number that doesn't show up in any qualification formula.
- Lifestyle costs that scale with the home. A bigger house often means more furniture, higher utility bills, and more to maintain — costs that compound after move-in.
- Your own risk tolerance. Qualification math assumes stable income. It doesn't know if your job is stable, if you're planning for kids, or how much cash cushion actually lets you sleep at night.
Find your real number
Instead of starting from "what's the biggest loan I can get," start from your monthly budget and work backward. Open the mortgage calculator, set the payment to a number that feels comfortable against your actual monthly budget — not your maximum DTI — and see what home price that supports. That's a far more useful starting point for house hunting than a pre-approval ceiling.