What Is a DTI Ratio
Your debt-to-income ratio, or DTI, is the percentage of your gross monthly income that goes toward debt payments. Lenders use it to judge whether you can afford to take on more debt, especially for a mortgage or car loan. A lower DTI usually means better approval odds and sometimes better rates. Use the DTI Calculator to find your ratio in seconds.
How DTI Is Calculated
DTI is computed as total monthly debt payments divided by gross monthly income, expressed as a percentage. Gross monthly income is your pay before taxes and other deductions. Monthly debt typically includes mortgage or rent, car payments, student loans, credit card minimums, personal loans, and other recurring obligations. Child support or alimony required by court order is usually included as well.
For example, if your gross monthly income is $6,000 and your total monthly debt payments are $1,800, your DTI is 30%. Lenders often cap back-end DTI (all debt) at 36% or 43%, depending on the program. Front-end DTI counts only housing costs and is often limited to about 28%.
Why Lenders Care About DTI
Lenders use DTI to see how much of your income is already committed. A high DTI suggests less room for a new payment and a higher risk of default. A lower DTI suggests you can comfortably handle additional debt. That is why improving your DTI—by paying down debt or increasing income—can improve your chances of approval and help you qualify for larger loan amounts or better terms.
What Counts as a Good DTI
Many conventional mortgage programs prefer a back-end DTI of 36% or below; some allow up to 43%. Government-backed programs may have different limits. Auto and personal lenders also use DTI when deciding loan size and rate. There is no single "good" number for every situation, but in general, keeping DTI under 36% puts you in a strong position for most loan types.
Practical Takeaway
Check your DTI with the DTI Calculator before applying for a mortgage or other large loan. If your ratio is high, focus on paying down existing debt or increasing income. For more on how DTI affects mortgage approval, read how DTI affects mortgage approval. For payment estimates, use the Mortgage Payment Calculator.
Frequently Asked Questions
- Include all recurring debt payments: mortgage or rent, car loans, student loans, credit card minimums, personal loans, and court-ordered alimony or child support. Do not include utilities, insurance, or non-debt expenses unless they are part of a single debt payment.
- Many lenders prefer a back-end DTI of 36% or below; some programs allow up to 43%. Front-end DTI (housing only) is often capped around 28%. Exact limits depend on the lender and loan type.