Estimate how much house you can afford from income, debts, down payment, rate and term using the 28/36 rule.
Estimate how much house you can afford from income, debts, down payment, rate and term using the 28/36 rule.
Enter values above and click Calculate — results will appear here with the formula explained.
The 28/36 rule is a common lender guideline: housing costs (PITI) up to 28% of gross monthly income, and all debts including housing up to 36%. This tool takes the more restrictive of the two to estimate affordable PITI, then inverts the mortgage payment formula to find the loan amount that fits that PITI, and adds down payment for price.
It estimates principal & interest only; property tax and insurance are not modeled separately — subtract them from PITI for a stricter price if needed. It assumes 0% PMI and no HOA.
This 28/36 guideline is from US mortgage underwriting (CFPB, Fannie Mae). It excludes HOA, PMI, utilities and maintenance which add 2-5% of price yearly. Use this as starting offer ceiling, then get pre-approval with actual credit, debts and lender overlays for authoritative decision.
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The 28/36 rule is a common lender guideline: housing costs (PITI) up to 28% of gross monthly income, and all debts including housing up to 36%. This tool takes the more restrictive of the two to estimate affordable PITI, then inverts the mortgage payment formula to find the loan amount that fits that PITI, and adds down payment for price. Formula: Max PITI = min(0.28*monthlyIncome, 0.36*monthlyIncome - debts); Price = (PITI loan payment) + down
Home Affordability Calculator computes estimate how much house you can afford from income, debts, down payment, rate and term using the 28/36 rule. Formula: Max PITI = min(0. Example: With $85k income ($7,083/mo), $500 debts, $40k down at 6.
Estimate how much house you can afford from income, debts, down payment, rate and term using the 28/36 rule. Formula: Max PITI = min(0.28*monthlyIncome, 0.36*monthlyIncome - debts); Price = (PITI loan payment) + down
| Field | What to enter |
|---|---|
| Annual gross income ($) | e.g. 85000 |
| Monthly debts ($) | e.g. 500 |
| Down payment ($) | e.g. 40000 |
| Mortgage rate (%) | e.g. 6.5 |
| Loan term (years) | e.g. 30 |
All fields use the exact formulas shown below — results include step-by-step breakdowns you can verify by hand.
The 28/36 rule is a common lender guideline: housing costs (PITI) up to 28% of gross monthly income, and all debts including housing up to 36%. This tool takes the more restrictive of the two to estimate affordable PITI, then inverts the mortgage payment formula to find the loan amount that fits that PITI, and adds down payment for price.
It estimates principal & interest only; property tax and insurance are not modeled separately — subtract them from PITI for a stricter price if needed. It assumes 0% PMI and no HOA.
This 28/36 guideline is from US mortgage underwriting (CFPB, Fannie Mae). It excludes HOA, PMI, utilities and maintenance which add 2-5% of price yearly. Use this as starting offer ceiling, then get pre-approval with actual credit, debts and lender overlays for authoritative decision.
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With $85k income ($7,083/mo), $500 debts, $40k down at 6.5% for 30y, affordable PITI is about $1,483/mo (28% rule tighter), implying about $275k loan + $40k down ≈ $315k home price.
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