The 28/36 rule
Many US lenders like housing costs (mortgage, property tax, insurance) under 28% of gross income, and total debt payments under 36%. You can change both limits in the calculator to match a lender or your own comfort level.
See the home price you could afford from your income, debts, deposit and mortgage rate.
You could afford a home of about
$307,823.74
Limited by your income
Calculation
Housing ≤ 28% of monthly income, and housing + debts ≤ 36%
A guide using common lender ratios (28% / 36% in the US). Lenders also look at your credit, savings and local rules — and the most you can borrow isn't always what's comfortable to repay.
Last reviewed by the OnlineToolPro team
Estimates the most expensive home you could afford using the debt-to-income ratios lenders commonly use: housing costs within about 28% of income, and all debts within about 36%. It includes property tax and insurance, and shows your loan-to-income multiple.
How it works
3 simple steps. No experience needed.
Good to know
Many US lenders like housing costs (mortgage, property tax, insurance) under 28% of gross income, and total debt payments under 36%. You can change both limits in the calculator to match a lender or your own comfort level.
FAQ
A common rule is that housing costs shouldn't exceed about 28% of your gross monthly income, and all debts about 36%. On $90,000 a year with few debts, that's roughly $2,100 a month for housing.
Many UK lenders cap borrowing at around 4.5 times income, and Australian lenders assess “serviceability” with a rate buffer. The calculator shows your loan-to-income multiple so you can compare.
Not necessarily. The maximum assumes nothing changes; leaving room in your budget protects you if rates or costs rise.
Step-by-step help for getting more out of the mortgage affordability calculator.
Explainer
The 28/36 rule lenders use to size your mortgage, with a worked example, how other debts shrink your budget, and how UK and Australian lenders differ.
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Comparison
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