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House Affordability Calculator
Derives max monthly housing and total debt from gross income and educational DTI guidelines, plus a rough home-price multiple, optionally comparing a proposed housing payment.
Limitation: Educational estimate only—not mortgage underwriting, a pre-approval, or financial advice.
How to Read a House Affordability Estimate
Treat DTI guidelines and income multiples as teaching scaffolds, not bank promises.
Enter annual gross income.
Need a payment from price, rate, and term?
Use the mortgage calculator first, then paste that payment here as proposed monthly housing.
What the House Affordability Result Means
Primary output is the rough max home price from the income multiple. Details include max monthly housing, max total debt, and DTI percents when a housing payment is entered.
House Affordability Examples
Under common teaching guidelines
Income and housing inputs
Rough max home price
Monthly gross is 10,000; 2,500 housing and 800 other debts sit under 28/36.
Price multiple only
Income and housing inputs
Rough max home price
Without a proposed payment, DTI status stays undefined.
After you calculate
Open the dedicated DTI calculator for a pure ratio view, and the mortgage calculator for amortization.
Frequently Asked Questions
Still have questions about this calculation?
Try the CalculatorHouse Affordability Formulas
No interest rate, taxes, insurance, HOA, or credit score enters this estimate.
Formula
Gross monthly income
annual gross income ÷ 12
Max monthly housing
gross monthly × front-end guideline% ÷ 100
Rough max home price
annual gross income × income multiple
Front-end / back-end DTI
housing ÷ monthly; (housing + other debts) ÷ monthly
Scientific Background
Assumptions: stable gross income, user-entered debts, teaching defaults near historical conventional talking points (often cited around 28/36). Limitations: program overlays, reserves, property type, and rate shocks are out of scope. Not lender underwriting.
Sources & review
House Affordability Calculator documents the references behind its formulas and assumptions. Always treat results as educational estimates, not personalized professional advice.
Last reviewed
July 22, 2026
Consumer financial tools
Consumer Financial Protection Bureau (CFPB)
https://www.consumerfinance.gov/ask-cfpb/what-is-a-debt-to-income-ratio-en-1791/Consumer financial tools
Consumer Financial Protection Bureau (CFPB)
https://www.consumerfinance.gov/owning-a-home/Free Calculator Hub methodology
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See our methodology and corrections policy.