The Number That Almost Sank Margot's Loan Approval
Margot found out one number on her loan application was about to sink her entire purchase. It had nothing to do with her credit score. It had nothing to do with her down payment.
A Common Situation for Small Business Owners
Margot runs a small business near Marion, SC. Her credit was strong. Her savings were solid. But when her loan file came together, one number stood out: her debt-to-income ratio was sitting right at the edge of what conventional loans typically allow.
This is a situation that comes up often for self-employed borrowers and small business owners. Income looks different on paper than it does in the bank account, and debt obligations can push that ratio higher than expected. The instinct is to assume a borderline DTI means an automatic no.
It doesn't.
What the Guideline Actually Says
Fannie Mae's Selling Guide, section B3-6-02, lays out exactly how debt-to-income ratios are evaluated for conventional loans:
"The maximum DTI ratio for manually underwritten loans is 36% with strong compensating factors, or up to 45% with specific requirements. DU may approve higher ratios based on overall risk assessment."
That last sentence is the part most buyers never hear about. DU, short for Desktop Underwriter, is the automated system lenders use to evaluate conventional loan files. Unlike a manual underwrite, which applies fixed ratio caps, DU looks at the entire risk picture - reserves, income stability, payment history, and more - and can approve a higher ratio than the manual limit would allow.
How This Played Out for Margot
In Margot's case, her ratio looked concerning when measured against a flat manual cap. But her file had real strengths: cash reserves, a consistent self-employment income history, and a clean payment track record. Running her file through Desktop Underwriter, rather than defaulting to manual underwriting assumptions, allowed those compensating factors to do their job.
That is the practical difference between a file that gets declined on a surface-level read and one that gets approved because the full picture was considered.
What You Can Do Today
If your debt-to-income ratio has you worried about qualifying for a conventional loan, here is one concrete question to bring to your loan officer:
"Is my file being run through Desktop Underwriter, or is this a manual underwrite, and what compensating factors are in my file to support a higher approved ratio under B3-6-02?"
That single question tells you whether your file is being evaluated with the flexibility the guidelines actually allow, or whether it's being measured against a stricter manual ceiling that may not reflect your full financial picture.
The Bottom Line
A high DTI does not automatically mean no. The guidelines build in room for automated underwriting to weigh the whole file, not just one ratio in isolation. Before you assume you don't qualify, make sure your loan officer is giving your file every chance to be seen clearly.
I'm Jason Sharon, licensed mortgage broker at Home Loans Inc. If your debt-to-income ratio has you second-guessing a purchase, call 843-569-7283 and let's find your path.
Home Loans Inc - Jason Sharon, Mortgage Broker. Company NMLS #1728740, Jason Sharon NMLS #1281448. Equal Housing Opportunity.
Learn more about this loan program: The Number That Almost Sank Margot's Loan Approval
