Mortgage Affordability Calculator
Estimate the maximum home price you can afford based on your income and debts.
Enter your numbers and select Calculate to see results.
About This Calculator
This calculator estimates how much house you can afford using the widely-used 28/36 rule: your housing payment should generally stay at or below 28% of gross monthly income, and your total debt payments (including housing) at or below 36%. Enter your income, existing monthly debts, down payment, interest rate, and loan term to see an estimated affordable home price and monthly payment.
How This Is Calculated
Max Payment = min(28% × Monthly Income, 36% × Monthly Income − Other Debts)
- 28%
- — Front-end ratio: max housing payment as a share of gross income
- 36%
- — Back-end ratio: max total debt payments as a share of gross income
On $90,000/year income with $400/month in other debts, the back-end limit allows about $2,300/month for housing, translating to roughly a $400,000 affordable home price at 6.5% with $40,000 down.
Assumptions
- Uses the conventional 28/36 debt-to-income guideline; FHA, VA, and other loan programs may allow higher ratios.
- Does not factor in your credit score, employment history, or cash reserves, which lenders also weigh heavily.
- Property tax and insurance are estimates you provide.
Frequently Asked Questions
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Last updated January 15, 2026. Results are estimates for informational purposes only — read our disclaimer.