The Complete DTI Ratio Guide for Mortgage Borrowers

Debt-to-income ratio (DTI) is the percentage of your gross monthly income that goes toward debt payments. It's one of the most important factors lenders use to determine how much you can borrow — and it's often the reason applications get declined.

Front-End vs Back-End DTI

Front-end DTI (housing ratio): Your proposed monthly housing payment (PITI) divided by gross monthly income. Most lenders prefer under 28–31%. Back-end DTI (total DTI): All monthly debt payments plus housing, divided by gross income. This is the critical number — most lenders cap it at 43–50%.

What Counts as Debt in DTI Calculation

• Proposed mortgage payment (principal, interest, taxes, insurance, HOA)
• Minimum credit card payments
• Car loans
• Student loan payments (even if in deferment — lenders impute 0.5–1% of balance)
• Personal loans
• Child support and alimony payments
• Other real estate mortgage payments

DTI Limits by Loan Type

• Conventional (standard): 43–45% back-end DTI
• Conventional with DU approval: Up to 50% in some cases
• FHA: Up to 57% with compensating factors
• VA: No official limit — but 41% preferred, higher with residual income
• USDA: 41% standard, up to 44% with compensating factors

How to Reduce Your DTI

• Pay off smaller debts entirely before applying
• Increase gross income with a raise, second job, or documented bonus
• Add a co-borrower with income and minimal debt
• Choose a lower-priced home to reduce the proposed housing payment
• Make a larger down payment to reduce the loan amount and monthly payment