Your debt-to-income ratio (DTI) is the percentage of your gross monthly income that goes toward debt payments. Lenders use it as a key signal of financial health — and it's one of the biggest factors that determines whether you qualify for a mortgage, and at what rate.
How DTI is calculated
Add up all monthly minimum debt payments (mortgage, car loans, student loans, credit cards, personal loans), then divide by your gross monthly income (before taxes). Multiply by 100 for the percentage. Example: $2,000 in monthly debts ÷ $6,000 gross income = 33% DTI.
Front-end vs. back-end DTI
Lenders look at two versions: front-end DTI (housing costs only ÷ income) and back-end DTI (all debts ÷ income). Most conventional mortgages want a front-end DTI below 28% and a back-end DTI below 36–43%. FHA loans allow back-end DTI up to 57% in some cases.
What the bands mean
- ≤36%: Excellent. You'll qualify for the best rates from most lenders.
- 37–43%: Acceptable. Most mortgage programs still available, but less negotiating room.
- 44–50%: High. Some loan programs available but expect higher rates and tighter scrutiny.
- Over 50%: Very high. Conventional mortgage approval is unlikely without significant compensating factors.
How to improve your DTI
- Pay down revolving credit card balances (they have the fastest impact)
- Avoid taking on new loans before applying for a mortgage
- Increase income (side income that can be documented counts)
- Refinance existing loans to lower monthly payments
Frequently Asked Questions
Does my current rent payment count toward my DTI?
Generally not, when applying for a mortgage. Lenders replace rent with the projected mortgage payment in the calculation. For other loan types (auto, personal loans), rent may or may not be factored in depending on the lender. Ask your specific lender which debts they include.
What is the maximum DTI to qualify for a conventional mortgage?
Most conventional lenders cap back-end DTI at 43–45%. Fannie Mae and Freddie Mac allow up to 50% with compensating factors like a high credit score, large down payment, or significant cash reserves. The lower your DTI, the stronger your application and the better the rate you'll be offered.
How quickly can I meaningfully lower my DTI?
Paying down revolving credit card balances has the fastest impact — minimum payment requirements drop almost immediately as balances fall. Paying off a car loan or student loan removes that payment entirely. Avoiding new credit applications in the 6–12 months before a mortgage application prevents your DTI from creeping up at a critical time.
Calculate your DTI now
Use our Debt-to-Income Calculator to enter your income and debt payments and get an instant front-end and back-end DTI with a lender rating.