Mortgage Affordability in 2026: A Practical 28/36 Rule Walkthrough
Use the 28/36 rule with taxes, insurance, and debt payments included so your home budget holds up after closing.
Estimate your mortgage payment
See principal, interest, taxes, insurance, PMI, and the all-in monthly payment.
Use mortgage calculatorAffordability is more than principal and interest
Many buyers estimate affordability from principal and interest only, then get surprised by taxes, insurance, and maintenance.
A better approach is to size your payment using all-in housing cost:
The 28/36 rule in plain English
- Keep housing costs under 28% of gross monthly income
If your gross monthly income is $7,500:
If non-housing debt is $550, your practical housing ceiling is closer to $2,150 (because of the 36% side).
Build your payment from the top down
Start with your safe housing cap, then subtract:
The remaining amount is what principal and interest can consume.
Why down payment still matters
Higher down payments help in three ways:
But draining all cash for a down payment can backfire. Keep a post-close reserve for repairs and moving costs.
Stress test before you shop
Run two scenarios:
If the higher-rate scenario breaks your budget, your price range is too aggressive.
A safer buying framework
- Use the lower of the 28% and 36% limits
Common mistake to avoid
Do not budget to the absolute max approval amount. Approvals often reflect underwriting limits, not comfort limits.
Use the mortgage calculator to model PITI first, then compare with your current monthly cash flow. The right purchase price is the one that lets you keep saving after move-in.
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Try Our CalculatorsThis article is for educational and informational purposes only and does not constitute professional financial, tax, or legal advice. Always consult with qualified professionals before making financial decisions.