Your debt-to-income ratio is the single number lenders care about most when deciding whether to approve your mortgage, auto loan, or personal loan. It measures the percentage of your gross monthly income that goes toward debt payments. A lower DTI means you have more financial breathing room, which makes you a less risky borrower.
How to Calculate Your DTI
DTI = (Total Monthly Debt Payments / Gross Monthly Income) × 100 Include all recurring debt: mortgage/rent, car loans, student loans, credit card minimums, and personal loans. Do not include utilities, groceries, or insurance premiums.
Example: You earn $6,000 per month before taxes. Your monthly debts include a $1,400 mortgage payment, a $350 car loan, $200 in student loans, and $150 in credit card minimums. Your total monthly debt is $2,100. DTI = ($2,100 / $6,000) × 100 = 35%.
Front-End vs Back-End DTI
Mortgage lenders actually look at two DTI numbers:
- Front-end DTI (housing ratio) — only your housing costs (mortgage principal, interest, taxes, insurance, HOA) divided by gross income. Most lenders want this below 28%.
- Back-end DTI (total DTI) — all monthly debt payments divided by gross income. This is the number most people refer to when they say "DTI." Lenders typically want this below 36–43%.
2026 Lender Thresholds
| Loan Type | Max Back-End DTI | Notes |
|---|---|---|
| Conventional | 43–45% | Some lenders allow up to 50% with strong credit (740+) and large reserves |
| FHA | 43% | Can go to 50% with compensating factors |
| VA | 41% | No hard cap; VA uses residual income test as well |
| USDA | 41% | Front-end max: 29% |
What Counts as Debt?
Lenders include any obligation that shows up on your credit report with a monthly payment. This covers mortgage or rent payments, auto loans, student loans (even if deferred — lenders use 0.5–1% of the balance as the assumed monthly payment), credit card minimum payments, personal loans, child support, and alimony. It does not include utilities, phone bills, streaming subscriptions, health insurance premiums, or grocery spending.
How to Lower Your DTI
There are only two levers: reduce debt or increase income. On the debt side, paying off a car loan or consolidating credit card balances has the most immediate impact. On the income side, a raise, side income, or adding a co-borrower can bring the ratio down. Refinancing existing loans at lower rates also reduces monthly obligations without changing the total balance. Use the Mortgage Calculator to model how different loan amounts affect your housing DTI.
Key Takeaways
- DTI below 36% is considered good by most lenders and gives you the best rates.
- DTI between 36–43% is acceptable for most loan types but may limit your options.
- DTI above 43% makes conventional mortgage approval difficult without strong compensating factors.
- Front-end DTI (housing only) should stay below 28% for the most flexibility.
- Pay off small debts first to quickly improve your ratio before applying for a mortgage.
Frequently Asked Questions
What is a good debt-to-income ratio for a mortgage?
Most lenders prefer a back-end DTI of 36% or lower for the best interest rates. Conventional loans can be approved up to 43-45%, and FHA loans may allow up to 50% with compensating factors like high credit scores or large cash reserves.
Does rent count in debt-to-income ratio?
If you are currently renting and applying for a mortgage, your rent is excluded because it will be replaced by the mortgage payment. The lender uses the projected mortgage payment (PITI) instead. However, if you own a property and are buying a second one, both mortgage payments count.
How do student loans affect DTI if they are in deferment?
Even if your student loans are deferred or in forbearance, most lenders still count them. They typically use 0.5% to 1% of the total loan balance as the assumed monthly payment. For example, a $40,000 student loan balance would add $200-$400 to your monthly debt figure.
Can I get a mortgage with a 50% DTI?
It is possible but difficult. FHA loans may approve DTI up to 50% if you have strong compensating factors such as a credit score above 680, significant cash reserves (3+ months of payments), or a history of successfully managing similar payment levels. Conventional loans rarely approve above 50%.