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How Much Can I Borrow?

Max loan based on income and expenses

How Much House Can I Afford?

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A loan affordability calculator determines the maximum loan amount you qualify for, given your income, existing debts, and the lender's debt-to-income (DTI) limits. Banks typically require total monthly debt payments to be below 36–43% of gross monthly income.

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Tip: Pay down high-balance revolving debt before applying for a mortgage. Each $1,000 reduction in monthly debt payments adds roughly $10,000–$15,000 to your maximum loan amount.

  1. 1Max monthly payment = Gross monthly income × DTI limit − Existing monthly debts
  2. 2Maximum loan = Monthly payment × ((1 − (1+r)^(−n)) / r)
  3. 3Front-end DTI: housing costs only ≤ 28% of income
  4. 4Back-end DTI: all debts ≤ 36–43% of income (lender-dependent)
$6,000/month income, $400 car payment, 36% DTI, 7%, 30yr=Max loan: ~$250,000Max payment: $1,760, net of car: $1,360
Annual Income36% DTI43% DTI
$50,000$153,000$182,000
$75,000$230,000$274,000
$100,000$306,000$366,000
$150,000$460,000$549,000
$200,000$613,000$732,000

Fun Fact

FHA loans allow a back-end DTI up to 57% in some cases. Conventional loans capped at 43–45%. VA loans have no strict DTI limit — they focus on residual income (what's left after all bills).

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