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Your debt-to-income ratio (DTI) is the share of your gross monthly income that goes to debt payments — and in 2026 it is the single number most likely to decide your mortgage application after your credit score. Lenders compute two versions: a front-end ratio for housing costs alone, and a back-end ratio for all debts. Conventional loans generally cap the back-end ratio at 43–45% (up to 50% through automated approval), FHA at 43% by default, and VA uses 41% as a guideline.
The two ratios, in one formula each
Front-end ratio = monthly housing costs ÷ gross monthly income. Housing costs mean principal, interest, property tax, homeowners insurance, HOA dues and mortgage insurance on the home you are buying.
Back-end ratio = all monthly debt payments ÷ gross monthly income. "All debts" means the housing payment plus every recurring payment on your credit report: car loans, student loans, personal loans, and credit cards at their minimum payments.
Both ratios use gross income — before tax — which surprises many applicants: a $90,000 salary is $7,500 a month for DTI purposes, whatever your take-home pay is.
The 2026 limits by loan type
These are the ceilings lenders actually apply. Exceeding the standard limit does not always mean a denial — it means your file needs compensating factors such as large reserves or a much higher credit score.
| Loan type | Front-end | Back-end | Stretch with compensating factors |
|---|
| Conventional | 28% (guideline) | 43–45% | Up to 50% via automated underwriting |
| FHA | 31% | 43% | Up to about 56.9% |
| VA | No separate limit | 41% (guideline) | Higher with strong residual income |
| USDA | 29% | 41% | Waivers for strong files |
A worked example
Take a borrower earning $7,500 a month gross, buying a home whose total housing cost (principal, interest, tax, insurance) is $2,100, with a $520 car payment and $330 of credit-card minimums:
- Front-end ratio: $2,100 ÷ $7,500 = 28.0% — right at the conventional guideline.
- Back-end ratio: ($2,100 + $520 + $330) ÷ $7,500 = 39.3% — inside the 43% ceiling.
- Room left: at a 43% cap, total debts could reach $3,225, so this borrower has about $275 a month of headroom — or could support roughly $325 more housing cost before hitting 43% back-end.
Run your own numbers in the DTI calculator, which shows both ratios, the verdict against each loan type, and the largest loan your income supports.
What counts as a debt — and what does not
Counted: the new housing payment, car loans and leases, student loans (at the reported or program payment), personal loans, credit-card minimum payments, child support and alimony, and any co-signed loan where you cannot document 12 months of payments by the other party.
Not counted: utilities, groceries, health insurance premiums, subscriptions, and rent on your current home (the new housing payment replaces it). Debts with fewer than 10 payments remaining may be excluded by some programs if the payment is small relative to your income.
Five ways to lower your DTI before you apply
- Pay off the smallest loan entirely — removing a $180 payment helps more than paying $5,000 off a large balance, because DTI counts payments, not balances.
- Do not open new credit in the months before applying; a new car payment is the fastest way to fail a ratio test.
- Pay credit cards down before the statement closes if a lender will re-pull or rapid-rescore; the minimum payment on the report is what counts.
- Document every income source the program allows — bonuses, overtime and side income with a two-year history can raise the denominator.
- Consider a longer term on debts you refinance, only if the total interest cost still makes sense; a lower payment lowers DTI but can cost more overall.
Frequently asked questions
What is a good debt-to-income ratio for a mortgage?
For conventional loans, most lenders want a back-end DTI at or below 43-45%; approvals through automated underwriting can reach 50% for strong files. A front-end (housing) ratio near 28% is the traditional guideline. FHA allows 31% / 43%, stretching to about 56.9% back-end with compensating factors, and VA uses 41% as a guideline rather than a cap.
Does my rent count in my DTI?
No. Rent is not a debt reported on your credit report, so it is not part of the back-end ratio for the new loan; the new housing payment replaces it in the calculation. Rent history still matters: many lenders verify 12 months of on-time rent payments, especially for first-time buyers.
Are student loans counted at the full payment?
Lenders count the payment shown on the credit report. On income-driven repayment plans, FHA and conventional guidelines let the lender use the actual IDR payment in many cases; if the report shows $0, a percentage of the balance (often 0.5%-1%) may be used instead, depending on the program.
How fast can I lower my DTI?
The quickest lever is paying off a small loan entirely, which removes its whole monthly payment from the ratio. Paying a balance down without closing it barely moves DTI, because the minimum payment changes little. Refinancing a car loan to a lower payment or documenting additional income can also help before you apply.
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This content is for educational purposes. Loan terms, rates, and requirements vary by lender and individual circumstances. Consult with a licensed professional for personalized advice.