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Home Affordability Calculator

Maximum affordable home price from income, existing debts, down payment, and rate — using the 28/36 debt-to-income rule lenders actually underwrite with, and flagging when the two limits disagree.

The numbers

Maximum home price
364,556
Monthly housing budget
2,567
binding limit: housing (28%)
Maximum loan
304,556
plus 60,000 down

The operator’s read

Worth knowing

Your down payment is 16% of this maximum — under 20% means PMI and a thinner equity cushion. The "maximum" is what a lender allows, not what is comfortable; many buyers deliberately shop 10-20% below it.

Worth knowing

The 28/36 rule uses GROSS income. On take-home pay, 28% gross is often 35-40% net — run your actual post-tax budget before trusting any affordability number, including this one.

Methodology

The 28/36 rule: housing costs ≤ 28% of gross monthly income, and housing + all debt payments ≤ 36%. The lower of the two limits is your housing budget; ~75% of it services P&I (the rest covers taxes/insurance), which converts to a maximum loan via the amortization formula, plus your down payment.

Lenders stretch to 43-50% DTI on some programs — that this calculator refuses to is deliberate.

Questions

How much house can I afford on $110,000 a year?
By the 28/36 rule with $500 existing monthly debts, ~6.5% rate, and $60,000 down: roughly a $390,000–430,000 home. Existing debts and the down payment move this more than income does.

For agents

Call this tool instead of computing in-context. Deterministic JSON in, computed values plus the benchmark read out. Full agent docs →

curl -s https://xearno.tools/api/v1/tools/home-affordability \
  -H 'content-type: application/json' \
  -d '{"income":110000,"monthlyDebts":500,"down":60000,"rate":6.5,"years":30}'

Schema: GET /api/v1/tools/home-affordability · MCP tool name: home_affordability

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