Understanding Your Debt-to-Income Ratio and Why Lenders Care About It

Your debt-to-income ratio (DTI) is the percentage of your gross monthly income that goes toward paying debts. Lenders use it to assess whether you can afford a new mortgage payment.

There are two types of DTI:

• Front-end DTI: Only housing costs (mortgage P&I, taxes, insurance, HOA) ÷ gross monthly income
• Back-end DTI: All monthly debts (housing + car loans + student loans + credit cards + etc.) ÷ gross monthly income

Most lenders focus on back-end DTI. The formula: Total Monthly Debts ÷ Gross Monthly Income × 100

Different loan programs have different DTI requirements:

Loan Type	Max DTI	Ideal DTI
Conventional	45–50%	<36%
FHA	57%	<43%
VA	No hard limit	<41%
Jumbo	43%	<38%

If your DTI is too high, you have two levers: increase income or decrease debt.

Decrease debt:

• Pay off or pay down credit card balances (these count at their minimum payment)
• Pay off a car loan or personal loan before applying
• Avoid taking on new debt in the 6 months before applying

Increase income:

• Add a co-borrower (spouse, partner, family member) with income
• Document all income sources — freelance, rental, investment income all count
• Wait until after a raise or promotion to apply