What is the maximum DTI for a conventional loan?
Fannie Mae's automated underwriting commonly accepts DTI up to 50%, with strong files clearing higher. Freddie Mac's LP often runs similar. Lender overlays usually cap lower — 45% is common, 50% is the practical ceiling for many channels. Manual underwriting is much stricter (often 36-45%).
What this actually means.
DTI is total monthly debts (the new conventional housing payment + taxes + insurance + HOA + CDD if any, plus credit card minimums, car loans, student loans, child support, alimony) divided by gross monthly income. Fannie's DU and Freddie's LP both have models that can clear DTIs above 45%, and conforming files at 50%+ are common when reserves, credit, and income stability are strong. Lender overlays often cap at 45%. Manual underwriting drops the cap materially. Subject to Fannie/Freddie guidelines and lender overlays.
What this looks like on a real file.
Where this can move.
Income type and history, recurring debts shown on credit, automated vs manual underwriting, compensating factors, and overlays can change the answer.
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More conventional questions on DTI.
Educational only. Conventional loan guidelines, lender overlays, rates, fees, PMI, LLPAs, and underwriting requirements can change. Final eligibility depends on full underwriting review. Mortgage Expert, Inc. is not affiliated with Fannie Mae, Freddie Mac, FHFA, or any government agency.