How Does the Fannie Mae Credit Score Change Affect You?

Fannie Mae's new rule, effective July 1, 2024, shifts the way a borrower's credit score is evaluated for conventional loan eligibility: instead of requiring a single, "minimum" score that applies to the entire loan file, lenders now must look at the borrower's "lowest" credit score across the entire credit report-including any secondary or joint applicants-and use that figure to determine eligibility for the loan-to-value (LTV) and debt-to-income (DTI) thresholds. In practice, this means a borrower with a primary score of 720 but a secondary score of 660 will be treated as if the 660 is the baseline when the loan is underwritten, potentially tightening the LTV limits or increasing the required cash-out.

The change also introduces a "credit score buffer" for borrowers whose scores fall just below the traditional minimum; lenders can now apply a modest upward adjustment (up to 20 points) if the borrower's overall credit profile is strong, but the primary metric remains the lowest reported score. This adjustment replaces the older "average-score" approach and aligns Fannie Mae's standards more closely with the risk-based models used by many private lenders.

Since Fannie Mae's new policy treats credit scores below 620 as "sub-prime," lenders that follow its guidelines will start flagging those applications more aggressively. A borrower with a 610 score who previously slipped through a lender's discretionary pocket may now encounter higher interest rates, stricter documentation requirements, or an outright denial, especially if the loan is intended for a conventional purchase. The shift is most pronounced for first-time homebuyers and cash-out refinances, where the lender has less flexibility to offset a low score with strong compensating factors.

Conversely, borrowers whose scores sit just above the 620 threshold can often expect smoother processing, because the updated rule leaves them in the "prime" bucket. However, even these applicants aren't immune-if other elements of the loan application (such as debt-to-income ratio or loan-to-value) are borderline, the lender may still impose tighter conditions. In mixed-score households, the lower of the co-borrowers' scores will drive the decision, so a partner's dip below 620 can pull the whole application into a more scrutinized tier.

Lendersaren't required to adopt the new Fannie Mae credit-score model, so many will continue to rely on the traditional scoring systems they've used for years. In practice, a borrower's loan application may be evaluated with a mix of scores depending on the lender's policies, the mortgage product, and any secondary-market guidelines that still reference older models.

Common alternative credit scores lenders may use

• FICO® Score 2 (formerly "FICO Base") - the original version most widely recognized by banks and credit unions for conventional mortgages.
• FICO® Score 4 (formerly "FICO 5") - preferred for FHA, VA, and USDA loans because it incorporates rental-payment history.
• VantageScore® 3.0 - an industry-competing model that some non-bank lenders adopt, especially for "quick-turn" applications.
• Equifax Credit Score 6 - a proprietary score sometimes required by regional lenders that have a long-standing relationship with Equifax.

Each of these scores follows its own algorithm, but they all map roughly onto the same 300-850 range, allowing lenders to compare applicants consistently even if they aren't using the new Fannie Mae score.

Since the Fannie Mae rule now treats a single credit-score threshold as the primary gauge, borrowers with a score that meets-or exceeds-the 620-point floor will generally find their mortgage approval process smoother. Lenders will still examine income, debt-to-income ratios, and employment history, but the credit score has become the decisive first hurdle. If your score sits comfortably above 720, you're likely to qualify for the most competitive rates, because lenders see you as low risk and can price the loan more aggressively. Scores between 620 and 719 may still secure a loan, yet the offered interest rate could be higher and the lender might request additional documentation to mitigate perceived risk.

Conversely, a score below 620 now triggers an automatic red flag under the new guidelines. While some lenders retain discretion to approve such loans-especially when other factors like a large down payment or strong cash reserves offset the credit weakness-the path to loan application acceptance becomes more uncertain. In practice, borrowers falling beneath the cutoff should anticipate either a higher rate, a larger required down payment, or the need to improve their credit profile before reapplying. Keeping your score above the threshold therefore often translates directly into better mortgage terms and a faster mortgage approval timeline.

Before the Fannie Mae update, a borrower with a credit score in the low-600s could still see a loan approved if other factors-such as a sizable down payment or strong cash reserves-offset the weaker credit. Lenders often applied flexible overlays, allowing the borrower to qualify for conventional financing as long as the overall risk profile stayed within their internal guidelines. In practice, the borrower might have been offered a slightly higher interest rate, but the loan could still close without needing a government-backed program.

After the change, Fannie Mae's tightened score floor means that a single borrower whose credit falls below 620 is now treated as a higher-risk applicant across the board. Even if the co-borrower or the loan's other characteristics are strong, the primary borrower's weak score can trigger additional documentation requirements, a higher required down payment, or outright denial of a conventional loan. Lenders may still consider the application, but they must rely on stricter eligibility thresholds, which often pushes the borrower toward alternative products or a higher-priced mortgage.

If your credit profile includes both strong and weaker scores-perhaps one borrower has a 720 while the co-borrower sits around 640-Fannie Mae's new weighting system will look at the higher number but still factor in the lower one when determining loan eligibility. In practice, the lender may treat the mixed profile as a "borderline" case: the higher score can help you stay within the 620 minimum, yet the lower score may trigger additional documentation, a higher interest rate, or a reduced loan-to-value ratio.

1. Submit the loan application - Provide both borrowers' credit reports so the lender can calculate the blended score per Fannie Mae's guidelines.
2. Await lender's risk assessment - The lender will compare the blended score to the 620 minimum, then evaluate the lower score for potential risk flags (e.g., recent delinquencies).
3. Respond to any conditions - If the lender requests extra documentation (pay stubs, tax returns, or explanations for the lower score), supply it promptly to keep the application moving.
4. Receive the decision - Approval may come with a higher rate, a larger down-payment requirement, or a reduced loan amount; alternatively, the lender may deny the loan if the risk appears too great.

By following these steps, borrowers with mixed scores can understand how the new Fannie Mae approach may affect their mortgage approval and what actions can keep the process on track.

Self-employed borrowers have always faced a tighter underwriting lens because lenders cannot rely on a steady paycheck to verify income. With Fannie Mae's new credit-score threshold-requiring a minimum of 660 for automated approval and 620 for manual review-many of these applicants will see the same baseline requirements applied, but the way their financial picture is evaluated may shift noticeably.

• A lower score (620-659) still allows a loan, but the borrower will likely need to provide additional documentation such as two years of tax returns, profit-and-loss statements, and possibly a higher down payment to offset perceived risk.
• If the score falls below 620, the loan will generally be denied under Fannie Mae's guidelines, prompting the borrower to either improve credit or explore alternative programs (e.g., FHA or non-Fannie loans).
• Borrowers with scores of 660 or higher can expect the standard automated underwriting flow, which often means fewer document requests and quicker mortgage approval, even if their income is irregular.

Overall, self-employed buyers should anticipate that the new credit-score floor may not change the qualitative assessment of their income stability, but it does tighten the numeric gatekeeping. Proactively polishing credit histories and preparing robust income documentation can help mitigate any extra scrutiny introduced by the updated thresholds.

First-time buyers often sit just below the traditional 620-point threshold that many lenders use to clear a conventional loan. Under the new Fannie Mae rule, borrowers with credit scores as low as 600 can still qualify for a loan-to-value ratio up to 95 percent, provided they demonstrate stable income and a reasonable debt-to-income ratio. This flexibility means a first-time purchaser who has a modest credit history but can show a solid payment track record may secure a mortgage with a smaller down payment than previously required, opening the door to homeownership sooner rather than later.

Because the rule also allows lenders to apply a more nuanced credit-score overlay, a borrower whose score falls in the 600-619 band can benefit from a "flexible" underwriting path that weighs recent positive credit behavior-such as on-time rent or utility payments-more heavily than older negative items. In practice, this can translate into a higher likelihood of mortgage approval, potentially lower interest-rate margins, and reduced out-of-pocket costs at closing, all of which are especially valuable for someone entering the market for the first time.

Before you submit a loan application, take a few concrete steps to position yourself for the best possible mortgage approval under the new Fannie Mae credit-score guidelines.

• Pull your credit reports from all three bureaus, verify that the information is accurate, and dispute any errors; a clean report can lift your score by several points.
• Pay down revolving balances to bring your credit utilization below 30 % (ideally under 10 %); lower utilization often translates directly into a higher score.
• Avoid opening new credit accounts or taking large loans for at least 30 days before applying, because each hard inquiry can temporarily depress the score.
• Keep a stable employment history and, if you're self-employed, gather at least two years of consistent income documentation to offset any scoring dips.
• If your score sits near the new cutoff thresholds (e.g., 660 for conventional loans), consider a short-term credit-building strategy-such as a secured credit card or a small installment loan-to boost it before you apply.