Your debt-to-income ratio is the share of gross monthly income that goes to required debt payments. Lenders use it to answer a simple question: can you actually afford another payment?
The formula
DTI = total monthly debt payments / gross monthly income
Include: mortgage or rent, auto loans, student loans, minimum credit card payments, personal loans, child support and alimony.
Exclude: utilities, groceries, insurance premiums, phone bills, streaming, and taxes.
Example: $2,400 in debt payments on $6,000 gross income = 40% DTI.
Cutoffs by loan type
| Loan type | Preferred | Typical maximum |
|---|---|---|
| Personal loan | Under 36% | 43%-50% |
| Auto loan | Under 40% | 45%-50% |
| Conventional mortgage | Under 36% | 45%-50% with compensating factors |
| FHA mortgage | Under 43% | 50%-57% with strong reserves |
Personal lenders vary the most. Prime lenders often cap at 40%; some near-prime lenders go to 50% if income is high and stable.
Front-end vs back-end
Mortgage underwriters split it in two. The front-end ratio counts only housing costs (target under 28%). The back-end ratio counts all debt. Personal loan underwriting almost always uses back-end only.
Three ways to lower DTI fast
1. Pay off a small installment loan entirely. Removing a $280 car payment from a $6,000 income drops DTI by nearly 5 points immediately — far more effective than paying $280 toward a large balance.
2. Reduce credit card minimums. Minimums are usually 1%-3% of the balance, so paying a card down lowers the counted payment as well.
3. Document all income. Side income, bonuses, and self-employment count if you can show a two-year history through tax returns or 1099s. Many borrowers under-report and fail DTI unnecessarily.
What not to do
Do not open a new account in the 60 days before applying. A new $400 payment can push a comfortable file over the line, and the hard inquiry compounds the damage.
Calculate your exact position with the debt-to-income calculator, then check offers on the comparison page.