Work out your front-end and back-end debt-to-income ratio the way mortgage and auto lenders do, and see how much monthly debt fits under 36% and 43%.
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With gross monthly income before tax $6,000, housing payment: rent, or mortgage with tax & insurance $1,600, car loan payments $400, student loan payments $250, credit card minimum payments $150, other loans, child support, alimony $0:
Debt-to-income ratio: 40.0%
Front-end (housing) 26.7% · total debts $2,400.00 a month on $6,000.00 gross · between 36% and 43% – many loans still possible, but tighter
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Back-end DTI = all monthly debt payments (housing + car, student, card minimums, other loans and support) ÷ gross monthly income × 100. Front-end DTI = housing payment ÷ gross monthly income × 100. Groceries, utilities and insurance other than on the home are not debts and are left out.
Formula source: DTI = monthly debt payments ÷ gross monthly income, with the 36% and 43% benchmarks described by the CFPB. CFPB – what is a debt-to-income ratio? · CFPB – why the 43% debt-to-income ratio is important
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Monthly figures:
| Example (gross monthly income) | Income | Monthly debts | Front-end DTI | Back-end DTI |
|---|---|---|---|---|
| Renter, no other debt | $5,000 | $1,400 | 28.0% | 28.0% |
| Renter with car and student loan | $5,000 | $2,050 | 28.0% | 41.0% |
| Homeowner with car loan | $7,500 | $2,650 | 29.3% | 35.3% |
| Homeowner, car, student loan and cards | $7,500 | $3,150 | 29.3% | 42.0% |
| Household earning $10,000 | $10,000 | $3,800 | 28.0% | 38.0% |
A car payment and a student loan add 13 points of DTI for a $5,000-a-month renter – enough to move from comfortable to close to the 43% limit.
The CFPB notes that many lenders prefer a DTI of 36% or less, and 43% is often the highest ratio for a qualified mortgage. Lower is always easier to get approved.
Gross – income before tax and deductions. That is why a 43% DTI can feel much heavier than it sounds on take-home pay.
Pay off a small loan entirely to remove its payment, pay down card balances so minimums fall, or add documented income. Refinancing to a longer term also cuts the payment but adds interest.
For a mortgage application, the new mortgage payment replaces rent. For other loans and for your own planning, rent is your housing cost.
No. Credit scores do not include income. Lenders look at DTI separately when they decide whether to approve you.
Front-end counts only housing; back-end counts housing plus all other debt payments. Lenders usually focus on back-end DTI.
Sources: CFPB – what is a debt-to-income ratio? · CFPB – why the 43% debt-to-income ratio is important