What DTI limits apply to contractor mortgages in 2026?

For contractors and self-employed borrowers in 2026, the maximum debt-to-income (DTI) ratio is roughly 50% on most loan types, but the exact cap depends on the program. Conventional loans run through Fannie Mae's automated underwriter allow up to 50%, FHA loans target 43% (with exceptions higher), and non-QM bank statement loans — the most common path for contractors — typically allow up to 50%, with some lenders stretching to 55% by exception.

The twist for contractors is not the cap itself but the income the cap is measured against. Traditional underwriting uses the net profit on your tax return after write-offs, which can make a healthy business look like it barely qualifies. Alternative-documentation programs measure your DTI against bank deposits or gross 1099 earnings instead, which is why they exist for this niche.

Conventional (Fannie Mae) loans

For loans underwritten through Fannie Mae's Desktop Underwriter (DU), the maximum allowable DTI ratio is 50%. Manually underwritten loans cap at 36%, which can be exceeded up to 45% when the borrower meets the credit-score and reserve requirements. Contractors still must document two years of self-employment income via tax returns for these loans, so write-offs directly lower the qualifying income.

FHA loans

FHA generally targets a back-end (total debt) DTI ratio around 43%. Per NerdWallet, a DTI of 43% or below is ideal, but exceptions can be made for borrowers who present strong compensating factors. If you want to see where you land before applying, run the numbers with a DTI calculator under each program's income method.

Non-QM / bank statement loans

Non-qualified mortgages are not bound by the federal Qualified Mortgage standard. The CFPB's General QM rule removed the rigid 43% DTI cap in 2020 and replaced it with a price-based threshold, which is what gives non-QM lenders room to underwrite differently. On bank statement loans, DTI ratios of up to 50% can qualify, with 55% allowed by exception, and qualifying income is calculated from 12 to 24 months of deposits rather than tax returns.

What this means for contractors

If your tax returns show heavy deductions, a conventional 50% DTI may still be out of reach because your qualifying income is low. A bank statement program with the same 50% ceiling can approve you because it counts gross deposits. The cap is similar; the denominator changes everything. To understand how these alternative-doc programs treat self-employed income, see what is a non-QM loan. Before applying, calculate your DTI under each method so you know which program fits.

Sources

• Fannie Mae Selling Guide — Debt-to-Income Ratios
• NerdWallet — FHA Loan Requirements for 2026
• CFPB — General QM Loan Definition Final Rule
• Griffin Funding — Bank Statement Loans