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Module 01 · Foundational · 25 min

Understanding Mortgage Credit Scores

Mortgage lenders do not use the FICO score most consumers see on free apps. This module explains the mortgage-specific scoring models, why they differ, and how the middle-of-three score determines loan qualification.

Learning Objectives
  • Identify the three mortgage FICO models lenders pull
  • Explain why VantageScore is not used for mortgage approval
  • Apply the middle-score / lower-borrower rule on a multi-borrower file
  • Read a tri-merge report and locate the qualifying score

Consumer Scores vs. Mortgage Scores

Apps like Credit Karma report a VantageScore 3.0. Mortgage lenders are required by Fannie Mae, Freddie Mac, FHA, VA and USDA to use older FICO models: FICO 2 (Experian), FICO 4 (TransUnion), and FICO 5 (Equifax).

These mortgage models weigh medical collections, authorized-user accounts, and recent inquiries differently than VantageScore. A buyer can have a 720 on Credit Karma and a 640 mortgage score on the same day.

The Middle-Score Rule

Lenders sort the three mortgage scores from lowest to highest and use the middle number as the qualifying score. If there are two borrowers, the lender uses the lower borrower's middle score.

  • Borrower A: 690 / 705 / 712 → middle = 705
  • Borrower B: 640 / 655 / 668 → middle = 655
  • Qualifying score for the file = 655

How Scores Are Weighted

FICO weights five categories. Knowing the weights tells you where restoration effort moves the score fastest.

  • Payment History — 35%
  • Amounts Owed / Utilization — 30%
  • Length of Credit History — 15%
  • Credit Mix — 10%
  • New Credit / Inquiries — 10%
Key Takeaways
  • Mortgage lenders use FICO 2/4/5, not VantageScore.
  • Qualifying score = middle of three; lower borrower wins on joint files.
  • Payment history and utilization drive 65% of the score.
End-of-Module Exam

Module 1 Exam — 5 questions

Pick the best answer for each question. Pass with 80% or higher to mark this module complete.

  1. 1.

    Which scoring model does a mortgage lender use for a Conventional loan?

  2. 2.

    Borrower A's middle score is 712. Borrower B's middle score is 648. The qualifying score is:

  3. 3.

    Which category carries the most weight in a FICO score?

  4. 4.

    A buyer shows you a 740 from Credit Karma. What should you tell them?

  5. 5.

    Utilization (amounts owed) represents what percent of the FICO score?

0 of 5 answered