Credit & UnderwritingFICOLetter F

FICO Score

A 3-digit credit scoring model developed by the Fair Isaac Corporation ranging from 300 to 850 that predicts credit risk.

Overview & Practical Application

A FICO Score is the standard credit scoring model utilized by over 90% of top US lending institutions to determine creditworthiness, loan eligibility, interest rate pricing, and borrowing limits.

The standard FICO scoring model calculates scores using five distinct data categories from the three major credit bureaus (Equifax, Experian, TransUnion): 1. Payment History (35%): On-time payment track record across credit cards, mortgages, and installment loans. 2. Amounts Owed / Credit Utilization (30%): Percentage of revolving credit limit currently in use. 3. Length of Credit History (15%): Average age of accounts, oldest account, and newest account. 4. New Credit & Inquiries (10%): Number of recent hard credit checks and newly opened tradelines. 5. Credit Mix (10%): Healthy combination of revolving accounts (credit cards) and installment loans (auto, mortgage, student).

DTI Conforming Underwriting Thresholds≤ 36% Optimal36% - 43% Warning> 43% High Risk≤ 36%: Prime approval threshold for conforming & prime auto loans36% - 43%: Standard Qualified Mortgage (QM) maximum cutoff limit> 43%: Requires strong cash reserves, FHA manual, or portfolio review
Visual Infographic: FICO Score

Key Underwriting Takeaways

  • Scores range from 300 to 850: 740+ is Considered Very Good, 800+ is Exceptional.
  • Keeping revolving credit utilization below 10% on each card has the fastest positive impact on score increases.
  • Mortgage lenders typically review a Tri-Merge Credit Report and use the middle score of the three bureaus.

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