Mortgage lenders use your credit report and credit score together, not the score alone. The report supplies the underlying record—accounts, balances, payment history, inquiries and public-record information—while a scoring model converts parts of that record into a number. That number can affect eligibility and the rate you are offered, but lenders also verify income, debts, savings, assets, employment and other loan information. The exact rules depend on the loan program, the lender, and whether underwriting is automated or manual.
For loans sold to Fannie Mae or Freddie Mac, the score-model rules are changing. As of the Federal Housing Finance Agency policy update dated October 2, 2026, eligible lenders in the interim rollout may choose Classic FICO or VantageScore 4.0. FICO 10T is approved for future use but is not yet being delivered, and no delivery date has been announced.
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Credit report and credit score: what each one tells a lender
The credit report is the evidence
A credit report is a file assembled from information supplied by creditors and other sources. In mortgage underwriting, the lender may review creditor and account names, balances, required monthly payments, account status, payment history, inquiries and public-record information. Fannie Mae’s Selling Guide says its report and public-record review covers seven years of credit history.
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The lender is looking for patterns rather than a single isolated entry. Repeated late payments, accounts that have been sent to collections, high balances relative to limits, recent applications for credit and limited experience managing credit can all change the risk assessment. The report also gives the lender information needed to calculate monthly obligations and verify debts that you may not have listed separately.
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The score is a model-generated summary
A credit score is a number produced by a scoring model from information in a credit report. Different reporting companies may hold different data or update it at different times, so the scores produced from Equifax, Experian and TransUnion data can differ. A lender’s score choice therefore matters: the same applicant can receive different numbers from different models or bureaus without any underlying event changing that day.
The Consumer Financial Protection Bureau describes the score as “only one component” of the mortgage decision, while noting that it remains important. A score can influence whether a loan is approved and the interest rate or other pricing the lender offers, but it cannot by itself establish that you can afford the payment.
What lenders inspect in your credit report
Payment behavior and account status
Underwriters examine whether payments were made on time, how recently any missed payment occurred, how severe it was and whether the pattern is isolated or repeated. They also check whether accounts are open, closed, paid, delinquent, charged off or in collection. A lender can ask for documentation when the report conflicts with your application or with information supplied by another creditor.
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Balances and credit limits help show how much of your revolving credit is being used. Required payments on installment loans, credit cards and other obligations feed into the debt calculations used in underwriting. A report can reveal a debt that was omitted from an application, so review the balances and payment amounts before you apply.
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Length and type of credit experience
The file shows how long accounts have existed and whether you have managed different kinds of credit. Fannie Mae says a lender’s assessment of credit-management skills can analyze repayment patterns, credit utilization and experience using credit. A thin file is not the same as a damaged file, but it may require other evidence or a different underwriting path.
Inquiries and public records
Recent inquiries indicate that you sought new credit. Public-record information and other report data may also be reviewed under the applicable program rules. The presence of an inquiry is not an automatic denial; its timing and context are considered with the rest of the file.
How the lender turns scores into a mortgage decision
Scores from the three nationwide reporting companies
Mortgage lenders have traditionally used FICO scores, according to CFPB consumer guidance. A lender commonly obtains scores associated with Equifax, Experian and TransUnion data. CFPB guidance says lenders often use the middle score to decide what rate to offer, but that description is general consumer guidance rather than a universal rule for every product.
Fannie Mae’s representative-score rules
Fannie Mae’s current Selling Guide provides more specific instructions for loans governed by its rules. When one borrower has two scores, the lower score is selected; when the borrower has three, the middle score is selected. In the cited multi-borrower examples for manually underwritten loans, the representative credit score for the loan is the lowest borrower-level representative score.
Those examples should not be applied to every lender, loan program or automated-underwriting recommendation. Freddie Mac rules, government-insured programs and a lender’s own overlays can differ. Ask the lender which rule applies to your specific application instead of assuming that the lowest, middle or highest score will always be used.
The score model is part of the answer
Classic FICO, newer FICO versions and VantageScore models can assign different values to the same report data. A lender must use the model permitted for the loan and delivery path. If you compare a score from a consumer-monitoring service with a score used for mortgage underwriting, treat it as an estimate unless the service identifies the same model, bureau data and timing.
What the lender evaluates besides your score
Mortgage underwriting combines credit information with the broader financial file. The CFPB identifies existing debt, savings, assets, current income, credit history with the lender and the credit report itself as factors that can affect the decision.
- Income and employment: The lender verifies the income it is allowed to use and whether it is expected to continue under the program’s rules.
- Debt obligations: Monthly payments from the report and your application are used in affordability calculations.
- Assets and savings: The lender checks funds needed for closing, reserves and the source of those funds.
- Loan and property details: Down payment, occupancy, property type, loan amount and program requirements affect eligibility.
- Credit history: Underwriters interpret recency, severity and repetition of problems rather than treating every late payment identically.
Automated underwriting systems can analyze report data and return an eligibility or recommendation result. Fannie Mae and Freddie Mac use scores for product eligibility and pricing and use report data in automated underwriting. A manual review may require a human underwriter to document explanations and compensating factors. An automated recommendation is not a guarantee that the lender will close the loan; the lender still verifies documents and applies any permitted overlays.
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2026 score-model transition for Fannie Mae and Freddie Mac loans
The FHFA policy page last updated October 2, 2026, describes an interim transition for loans sold to the two housing-finance Enterprises. Eligible participating lenders may choose either Classic FICO or VantageScore 4.0. The choice is made loan by loan and must be the same model for all borrowers on that loan.
| Model | Status in the interim policy | What a borrower should understand |
|---|---|---|
| Classic FICO | Eligible | It remains an approved option; FHFA has not announced a retirement date. |
| VantageScore 4.0 | Eligible for lenders participating in the rollout | Some lenders may not participate, so availability depends on the lender and the loan. |
| FICO 10T | Approved for future use | It is not yet being delivered for Enterprise loans, and no delivery date has been announced. |
The initial transition does not change the current reporting requirements, including tri-merge reporting, according to FHFA. “Tri-merge” means the lender continues to obtain information associated with all three major reporting companies. Do not assume that every mortgage lender has switched models, that VantageScore 4.0 is available for every mortgage, or that FICO 10T is already in use.
What happens when a lender checks your credit
The inquiry is recorded
A mortgage lender’s credit inquiry can have a small negative effect on a score. CFPB guidance says mortgage inquiries made within a 45-day window are recorded as one inquiry for scoring purposes. That policy is intended to let borrowers shop among mortgage lenders without treating each rate quote as a separate burst of borrowing activity.
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Keep mortgage inquiries within the 45-day window when possible, and avoid applying for unrelated new credit shortly before or during the mortgage process. Additional applications can create more inquiries and new accounts, and the effect on an individual score cannot be predicted to a particular number of points. Checking your own report or score does not affect your score.
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Check for errors before the application
Use the free report access identified by the CFPB at AnnualCreditReport.com and review all three reports before submitting a mortgage application. Look for accounts that are not yours, incorrect balances, duplicate collections, obsolete negative information, wrong payment statuses and addresses that could cause a lender to confuse your file with another person’s.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.A practical preparation checklist
- Retrieve all three reports. Save copies and note the date each report was issued.
- Reconcile every debt. Compare balances and required payments with your statements and application worksheet.
- Dispute factual errors early. Contact the reporting company and the creditor or other furnisher that supplied the incorrect information.
- Pause unnecessary new credit. Do not open cards, finance a vehicle or apply for personal credit unless your mortgage professional says it is necessary.
- Ask the lender which score model and underwriting path apply. For an Enterprise loan, ask whether the lender participates in the VantageScore 4.0 interim rollout.
- Prepare the rest of the file. Gather income records, asset statements, explanations for unusual deposits or credit events and documentation of recurring obligations.
- Shop mortgage offers in a controlled window. Compare the annual percentage rate, interest rate, points, lender fees, cash required at closing, loan program and eligibility conditions—not just the score quoted to you.
If the lender denies the application
An adverse-action notice must give the principal reasons for the decision or tell you how to obtain them. If the lender relied on credit-report information, the notice must identify the reporting company, provide the score used and the key factors that affected it. It must also explain your right to obtain a free copy of the report from that reporting company within 60 days of the notice.
Read the notice before deciding what to fix. If the report contains inaccurate information, dispute it with the reporting company and with the furnisher that supplied the information. Keep copies of the dispute, supporting documents and the lender’s notice. A dispute is appropriate for factual errors; it is not a guarantee that accurate negative information will be removed or that a loan will be approved after correction.
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Two lenders can evaluate the same borrower differently because they use different programs, underwriting systems, overlays or permitted score models. Ask each lender for the following information in writing:
- Which loan program and investor rules apply.
- Which credit-score model and reporting companies will be used.
- Whether the lender participates in the VantageScore 4.0 interim rollout for eligible Fannie Mae or Freddie Mac deliveries.
- How scores are selected when there are two borrowers or different numbers of scores.
- Which debts, reserves, income types and credit events require additional documentation.
- The complete rate and cost package, including points, lender fees, mortgage insurance and cash needed to close.
Do not choose a lender solely because an advertised score threshold appears lower. A lender’s rate, fees, documentation requirements and program eligibility can matter more to the final cost than a small difference in a quoted score.
Key limits to keep in mind
- There is no single score rule for every U.S. mortgage. Agency requirements, government-loan rules, manual versus automated underwriting and lender policy all matter.
- Consumer-facing scores may not match the score a mortgage lender uses.
- A model transition for Enterprise loans does not mean every lender has changed its process.
- A 45-day inquiry-shopping period and a 60-day adverse-action report-request period are policy periods, not promises about how many points a score will change or how quickly a loan will close.
- Credit information is only one part of the underwriting file; strong income and assets do not erase unresolved credit-report errors, and a high score does not replace proof that the payment is affordable.
The most reliable approach is to inspect your reports first, limit unrelated credit activity, ask which model and underwriting path will be used, and compare complete loan offers. The lender’s credit decision is built from the report, the score and the rest of your verified financial circumstances together.
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