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What house can you actually afford?
Lenders will often approve you for as much as 43% of your pre-tax income going to debt. A comfortable budget usually sits well below that. We show all three — cautious, typical, stretched — so you can see where the math gets uncomfortable.
How your payments add up · Typical budget
How this loan gets paid down over 30 years. Each year, part of your payment chips away at the loan (principal) and part is interest — this shows the split. Pick a different budget above to see how the numbers change.
Why three numbers, not one.
It comes down to two ratios: your housing cost divided by your pre-tax income (the 'housing ratio'), and all your debt divided by your pre-tax income (the 'total-debt ratio'). Different lenders and risk tolerances use different caps.
max monthly housing payment = the smaller of: (monthly pre-tax income × housing-ratio) or (monthly pre-tax income × total-debt-ratio − your current monthly debt payments)Cautious uses 28/36 (the classic rule). Typical uses 30/43 (most conventional lenders). Stretched uses 35/50 — the limits some government-backed (FHA) loans and certain banks will allow. We find the biggest loan that fits each monthly limit at your rate, then work out the home price that down payment supports.
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