When two people apply together, lenders typically use the lower middle score of the two borrowers. Each borrower has three scores (Experian, Equifax, TransUnion). The lender takes the middle score for each person, then uses the lower of those two.
Person A: scores 720, 710, 695 → middle score = 710
Person B: scores 580, 590, 575 → middle score = 580
Lender uses: 580
All the income from both borrowers is included. All the credit from the worst borrower is included. You get the income benefit but also the credit penalty.
If the higher-income person has the better credit, they can apply alone. The lower-credit person can be added to the title (ownership) after closing without being on the loan.
The problem: you lose the second person's income for qualification. If you can qualify on one income, this is often the better path.
FHA loans allow a non-occupying co-borrower — a parent, for example — to be on the loan without living in the property. The co-borrower's income and credit are both used. This can help if the occupant has lower income but decent credit.
If the lower-credit person's score is the primary issue, a 6-12 month credit repair program before applying can make an enormous difference. A 580 score to 640 can mean the difference between FHA-only and conventional loan options — and $30,000+ over the life of the loan.
If the bad credit is due to collections, late payments, or high utilization — not a bankruptcy or foreclosure — scores can move 50-80 points in 3-6 months with focused effort.
Four steps from the federal record: the code, the written questions, the lender spread. No prediction, no lender pick.
The Denial Map → 🔍 Decode Denial LetterNot financial advice. Educational content based on 23 years of mortgage industry experience.
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Credit-score thresholds are the visible half of qualifying. The other half is which lender receives your file — and that half is measurable. In the complete 2025 federal HMDA record (1,187,606 FHA applications that reached a credit decision), denial rates across the 100 largest FHA lenders ranged from 1.8% to 78.7%. Same federal program, same year: a 44× spread.
And it is not simply a matter of who applies where. Holding state, loan amount, income, debt-to-income and loan-to-value constant across 24,933 borrower-profile cells, applicant mix explains only a 2.9× range — while the observed spread stays 44×.
CFPB HMDA 2025, computed by FinanceRateCalc · decisioned = actions 1,2,3 · rates partly reflect applicant mix · historical observation, not a prediction about any individual application · free, CC BY 4.0.