Most people assume they have one credit score. In reality, you have dozens — each bureau has multiple versions of your score, and they often show meaningfully different numbers. A difference of 20–50 points between bureaus is common; differences of 80+ points are not unusual. This matters most when you're applying for a mortgage, where lenders use all three.
Why the Scores Are Different
Creditors Report to Different Bureaus
Not every creditor reports to all three bureaus. Your landlord may report to one. Your credit union may only report to TransUnion. A medical collection may appear at Equifax but not Experian. When an account exists on one report and not another, the scores calculated from each will naturally differ.
Data Timing
Bureaus update independently. A balance payoff that was reported to Experian this week may not yet be updated at TransUnion or Equifax. This creates temporary score differences that typically resolve within 30 days after all bureaus receive the updated data.
Different Scoring Models
Even with identical underlying data, different score models produce different numbers. FICO 8, FICO 9, VantageScore 3.0, and VantageScore 4.0 all use slightly different algorithms and weightings. Your score from Credit Karma (VantageScore) will consistently differ from your score used by a mortgage lender (FICO 2/4/5).
The free score you see on Credit Karma, your bank app, or a monitoring service is almost certainly not the same model used by lenders. These services use VantageScore for monitoring — a useful directional indicator, but not the score that determines your mortgage rate.
The Score Differences That Matter Most
| Context | Which Score Matters |
|---|---|
| Mortgage application | FICO 2 (Experian), FICO 4 (TransUnion), FICO 5 (Equifax) — middle score used |
| Auto loan | FICO Auto 8 or FICO Auto 2/4/5 depending on lender |
| Credit card application | FICO 8 or FICO 9 from one bureau (lender's choice) |
| Personal loan | FICO 8 or FICO 9 typically |
| Rental application | Often VantageScore or TransUnion-specific model |
How to Improve All Three Scores
The most reliable way to raise all three is to address the underlying data at each bureau separately:
- Pull all three reports and compare them side by side — look for accounts that appear on one but not others
- Check for accounts that exist at all three but have different balances or statuses reported
- Dispute inaccuracies at each bureau separately — fixing something at Experian doesn't fix it at TransUnion
- If an account is missing positive history at one bureau, contact the creditor and ask them to report to all three
- Pay balances before statement close dates so the reduced balance gets reported everywhere
Closing the Gap Before a Major Application
If you're preparing for a mortgage and see a big difference between your bureau scores, prioritize the lowest score. Find out what's dragging it down — look for any negative items that appear on that report but not the others. A targeted dispute or paydown on the weak bureau can meaningfully improve your middle qualifying score.