DTI Explained

Debt-to-Income Ratio:
The Number That Determines Your Approval

Your DTI ratio is one of the three pillars of mortgage approval — alongside credit score and down payment. Learn how DTI is calculated, what limits apply to each loan type, and 7 proven strategies to lower your DTI before applying.

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How Debt-to-Income Ratio Works

Your debt-to-income (DTI) ratio is the percentage of your gross monthly income that goes toward debt payments. Lenders use it to measure your ability to manage monthly payments and repay the loan. There are two types: front-end DTI (housing costs only) and back-end DTI (all debts).

DTI Calculation Formula

Front-End DTI

(Monthly Housing Costs ÷ Gross Monthly Income) × 100

Housing = PITI + HOA + PMI

Back-End DTI

(Total Monthly Debt ÷ Gross Monthly Income) × 100

Total = Housing + credit cards + car loans + student loans + other debts

Example: $6,000 gross monthly income. Proposed housing: $1,800. Other debts: $600 (car $400 + credit cards $200). Front-end DTI: $1,800 ÷ $6,000 = 30%. Back-end DTI: ($1,800 + $600) ÷ $6,000 = 40%.

DTI Limits by Loan Type

Loan Type Max DTI Notes
Conventional 45-50% Up to 50% with strong compensating factors (high credit, reserves)
FHA 43-50% Up to 50% with compensating factors
VA 41% Residual income test may override DTI. More flexible than the number suggests.
USDA 41% Stricter than other programs. 29% front-end, 41% back-end.
Jumbo 43% Typically stricter. 700+ credit and significant reserves required.

7 Ways to Improve Your DTI

Pay down credit card balances — the fastest way to lower DTI. Even reducing balances by $2,000-3,000 helps.
Pay off a small loan entirely — eliminate a car payment or personal loan to remove it from DTI.
Increase income — second job, overtime, freelance work. Counts if you can document 2-year history or it's salary.
Add a co-borrower — their income counts, lowering the DTI. Their debts also count.
Refinance or consolidate debts — lower payments on existing debts reduce DTI.
Choose a smaller loan — lower purchase price = lower housing payment = lower DTI.
Use an ARM — lower initial rate = lower payment = lower DTI for qualification purposes.

DTI FAQs

What's a good DTI for a mortgage?

What counts in DTI — and what doesn't?

How are student loans treated in DTI?

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