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Find how much house you can afford using the 28/36 lender rule. Includes principal, interest, taxes, insurance, and HOA.
You Can Afford
$326,425
Loan amount: $286,425 @ 6.4%
Monthly P&I
$1,784
Property Tax/mo
$299
Insurance/mo
$133
Total PITI
$2,217
DTI After
34.3%
28% Housing Cap
$2,217
The 28/36 rule
Lenders typically cap your housing payment at 28% of gross income and your total debt service at 36%. A conservative DTI is below 28%, FHA loans allow up to 43–50%, but stretching DTI cuts into emergency savings and flexibility.
House Affordability Calculator uses a binary-search solver to find your maximum home price where PITI (principal, interest, property tax, insurance) stays within the 28% front-end and 36% back-end DTI guidelines.
House Affordability Calculator is a high-performance utility designed to help users streamline their workflow. Built with modern web technologies, it ensures fast processing times and high-quality outputs directly in your browser.
Binary search iterates over home price until PITI payment ÷ gross income ≤ 28% and total monthly debts ÷ gross income ≤ 36%. Property tax and insurance scale with home price. Live 30-year mortgage rate is imported from FRED via the existing mortgage data script.
Housing payments (PITI + HOA) should stay under 28% of gross monthly income, and total debt service (housing + auto + credit cards + student loans) under 36%. This is the standard lender risk threshold.
FHA loans accept up to 43% DTI, and some lenders go to 50% with compensating factors (strong credit, large down payment, savings cushion). But stretching DTI cuts deeply into emergency savings.
Only if their income will be on the loan application. Both incomes on the loan = both debts considered. One person on the loan = only that person's income and debts count.
Principal, Interest, Taxes, Insurance — the full monthly cost of owning a home with a mortgage. HOA and PMI are added on top.