Why Your Credit Karma Score Is Different From Your FICO Score

The Question We Hear Every Week

Almost every week, a client walks into Mortgage Help ASAP and asks Damon & Ashley Boswell the same question: 'Credit Karma says my score is 720, but the lender just pulled a 678. Which one is right?' It is one of the most common sources of confusion in credit restoration, and the Boswell team wants to clear it up once and for all.

Ashley Boswell's short answer is this: both numbers can be accurate, but they are calculated using completely different scoring models. Credit Karma displays VantageScore 3.0 scores, while the vast majority of lenders — especially mortgage lenders — pull FICO Scores. Damon Boswell compares it to weighing yourself on two different scales calibrated differently; both readings are real, but only one is the scale your lender actually uses.

VantageScore vs FICO: Two Different Formulas

Damon Boswell explains that FICO and VantageScore are competing scoring models built on the same underlying credit report data but weighted differently. FICO, created by the Fair Isaac Corporation, is the oldest and most widely used model in lending. VantageScore was developed jointly by the three credit bureaus — Equifax, Experian, and TransUnion — as an alternative, and it is the model Credit Karma shows you for free.

Ashley Boswell breaks down the weighting differences. Under FICO Score 8, payment history counts for roughly 35% and amounts owed for about 30%. Under VantageScore 3.0, payment history carries even more weight at about 40%, while the age and type of credit combined account for roughly 21%. Because the formulas emphasize different factors, the same credit profile can produce noticeably different numbers from each model.

Which Score Do Lenders Actually Use?

This is where it matters most. Damon Boswell tells clients that for mortgages, lenders overwhelmingly use older FICO models — specifically FICO Score 2, FICO Score 4, and FICO Score 5 — pulled from each of the three bureaus. These classic mortgage scores often differ from the FICO Score 8 you might see on a credit card app, and they almost always differ from the VantageScore on Credit Karma.

Ashley Boswell adds that auto lenders and credit card issuers tend to use industry-specific FICO scores, such as FICO Auto Score or FICO Bankcard Score, which are tuned to predict risk for that particular type of credit. So the score a car dealership sees may not match the score your credit card app shows either. The Boswell team helps clients understand that there is no single universal credit score — there are dozens of versions, and the right one depends on who is pulling it.

Why the Gap Can Be So Large

Damon Boswell has seen gaps of 50 points or more between a client's Credit Karma VantageScore and the FICO score a lender pulled. One major reason is that the two models treat certain items differently. For example, VantageScore 3.0 may ignore paid collections entirely, while FICO Score 8 still counts them. That single difference can swing a score by dozens of points.

Ashley Boswell also points to timing. Each bureau updates on its own schedule, and a recent payment or dispute may have updated one bureau's file but not yet the others. Credit Karma pulls from TransUnion and Equifax, so if a change hit Experian first, the Credit Karma number will lag. The Boswell team always reminds clients that a score is a snapshot in time, not a permanent number.

How to Use Credit Karma the Right Way

Damon & Ashley Boswell do not tell clients to ignore Credit Karma — it is still a valuable tool. Damon Boswell recommends using it to monitor your reports for free, watch for new inquiries or accounts you did not open, and track the general direction of your credit over time. The trend matters more than the exact number.

What Ashley Boswell cautions against is treating the Credit Karma score as the number a lender will see. If you are preparing for a mortgage application, ask your lender which FICO model they pull, and focus your preparation on the factors that model weighs most heavily — payment history and amounts owed under the classic mortgage scores.

Let the Boswells Align Your Scores

Understanding which score matters is the first step; improving the right one is where Mortgage Help ASAP comes in. Damon & Ashley Boswell review your reports across all three bureaus, identify the items dragging down the FICO scores lenders actually use, and build a dispute and optimization strategy targeted at the model that counts. Reach out today and we will make sure the number your lender pulls is the one you want them to see.