How to use the DTI calculator
- Enter your gross monthly income, meaning before taxes. If you're salaried, divide your yearly salary by 12.
- Enter your housing payment. Renters enter rent; owners include the mortgage, property tax, home insurance and HOA.
- Add your other monthly debt payments: car, student loans, credit card minimums and any other loans.
You'll see both the front-end (housing only) and back-end (all debts) ratios, how lenders typically view them, and how much more monthly debt you could take on before hitting common limits.
The DTI formulas
Back-end DTI = Total monthly debt payments ÷ Gross monthly income × 100
Front-end DTI = Monthly housing costs ÷ Gross monthly income × 100
Example: with $6,500 gross monthly income, $1,600 housing and $770 in other debt payments, total debt is $2,370. That's a back-end DTI of 36.5% and a front-end DTI of 24.6%.
How lenders view your DTI
| Back-end DTI | What it usually means |
|---|---|
| Under 20% | Excellent: lots of room in your budget |
| 20% – 36% | Good: most lenders are comfortable |
| 36% – 43% | Acceptable for many mortgages, but it limits how much you can borrow |
| 43% – 50% | High: only some loan programs, usually with strong credit or savings |
| Over 50% | Very high: hard to qualify, and a sign to pay down debt |
Exact limits depend on the lender and loan type (conventional, FHA, VA, auto or personal loans), and on your credit score and savings.
Why DTI matters even if you're not borrowing
DTI is a quick health check for your budget. A ratio above about 40% means a large share of your income is committed before you've paid for food, utilities or savings. That leaves little cushion for emergencies. Bringing it down, starting with the highest-interest debts, frees up cash every month.
This is an estimate for planning purposes and not a loan approval.