Credit Score Basics for a Mortgage
Written for Louisiana Mortgage Handbook by Chasity Graff, Mortgage Broker/Owner of LA Lending, LLC.
Last reviewed: 2026-06-24
Quick Answer
Credit scores matter in mortgage lending because they can affect the loan programs available, interest rate pricing, mortgage insurance, down payment options, and final approval.
A credit score by itself does not approve or deny a mortgage. The full file still matters — income, debts, assets, property, documentation, underwriting review, lender guidelines, and approved credit.
Why Credit Matters
Credit gives the lender a picture of how debt has been handled over time.
That includes payment history, balances, account history, recent credit activity, and whether there are major issues like collections, late payments, charge-offs, judgments, or disputed accounts.
What Credit Can Affect
Credit can affect the interest rate, loan program, mortgage insurance, down payment requirement, approval path, and whether extra documentation is needed.
For some borrowers, a small score change may only affect pricing. For others, the score may affect whether a certain loan program is available.
My Thought Process
I do not look at credit just to find a score. I am looking for the story behind the score.
If something looks tight, I would rather find it early and talk through it before you fall in love with a house. The goal is to know whether the loan has a real path to closing, with approved credit and final underwriting review.
Common Mistakes
- Assuming one credit score tells the whole story.
- Opening new credit while shopping for a home.
- Running up credit card balances before closing.
- Ignoring collections or late payments until underwriting asks about them.
- Assuming online credit scores are the same scores used for mortgage lending.
Bottom Line
Credit matters, but it is one part of the full mortgage file.
A strong credit profile can make the process smoother. A challenged credit profile does not always mean the answer is no, but it may change the loan options, pricing, documentation, or timing.
Related Questions
- What Credit Score Do I Need to Buy a House?
- Why Credit Scores Can Change During the Mortgage Process
- What Not to Do With Credit Before Closing
- What Happens If Credit Has to Be Repulled?
Educational Note
Educational note: This page is meant to explain the mortgage process in plain English. It is not a loan approval, commitment to lend, rate quote, or legal/tax advice. Mortgage programs, pricing, payments, documentation requirements, and guidelines can change. Final approval depends on credit, income, assets, property approval, appraisal, title review, underwriting review, lender guidelines, and approved credit.