TransUnion and Equifax use different scoring models, so your score from one bureau will rarely match the other

Your credit score from TransUnion and Equifax are often different numbers because each bureau collects slightly different information about you and uses its own formula to turn that information into a score. TransUnion and Equifax are two of the three major credit reporting bureaus — the companies that track your payment history, debt levels, and other financial behavior. They don't share data with each other, so one bureau might have accurate information about an account while the other has outdated or missing information. Even when they have the same data, they weight it differently in their scoring models.

The gap between your two scores can be anywhere from a few points to 50 or more points. A lender checking your credit will typically see scores from all three bureaus (the third is Experian) and may use the middle score, the lowest score, or an average — the rules vary by lender and loan type. Knowing which score matters for your situation helps you understand where you actually stand before you explore for credit.

Key Takeaways

  • TransUnion and Equifax maintain separate databases of your credit history, so they often report different account information and balances.
  • Both bureaus use their own scoring formulas, meaning they weight payment history, debt levels, and other factors at different rates.
  • A difference of 10 to 50 points between your TransUnion and Equifax scores is normal and does not mean one bureau made an error.
  • Lenders use different rules about which score to check, so the score that matters most depends on the type of credit you are seeking.
  • You can view your credit reports from all three bureaus for free once per year at AnnualCreditReport.com, the official government site.

How each bureau collects different information about you

TransUnion and Equifax don't have a shared database. Instead, creditors and lenders report your account activity to whichever bureaus they choose — some report to all three, some to only one or two. A credit card company might report to Equifax and Experian but skip TransUnion. A car loan might go to all three. A medical debt collector might report to only one. Over time, this creates gaps and differences in what each bureau knows about you.

The timing of updates also varies. One bureau might receive a payment report within days, while another takes weeks. If you check your score during that window, TransUnion might show your payment as posted while Equifax still shows the old balance. These timing differences usually resolve within 30 to 45 days, but they can create temporary score swings.

Errors also contribute to score differences. A debt might be reported to one bureau but not removed when you pay it off. An account might be listed twice under slightly different names. A fraud alert or freeze on one bureau's report won't affect the others. These problems are why checking all three reports matters — you might find an error on one bureau that's dragging down your score there but not affecting the others.

Why the scoring formulas themselves are different

Even if TransUnion and Equifax had identical information about you, they would still produce different scores because they use different scoring models. The most common model is called FICO, but FICO has multiple versions. TransUnion might use FICO Score 8, while Equifax uses FICO Score 9. Each version weights the same factors — payment history, credit utilization, length of credit history, credit mix, and new credit inquiries — at slightly different percentages.

TransUnion and Equifax also each offer their own proprietary scores that aren't FICO scores at all. TransUnion's TransRisk score and Equifax's Equifax Risk Score use their own formulas. Some lenders use these proprietary scores instead of FICO. When you check your score through a free credit monitoring service, you might be seeing one of these proprietary scores rather than the FICO score a lender will actually use.

The difference in formulas means that even small changes in your credit behavior can shift your scores differently. Paying down a credit card balance might raise your TransUnion score by 15 points but your Equifax score by only 8 points, because they weight credit utilization differently. This is normal and expected.

What score range counts as "good" at each bureau

Both TransUnion and Equifax use the same score range: 300 to 850. A score of 670 to 739 is generally considered "good," 740 to 799 is "very good," and 800 and above is "excellent" at both bureaus. However, because your actual numbers will differ between them, you might fall into different categories at each bureau. You could have a "good" score at TransUnion and a "very good" score at Equifax, or vice versa.

Lenders set their own cutoffs for approval. A mortgage lender might require a minimum score of 620, a credit card issuer might require 650, and a car loan company might require 700. Since lenders typically check all three bureaus, they usually have a policy about which score they use — some take the middle score, some take the lowest, and some average them. Knowing your score at all three bureaus gives you a realistic picture of your approval odds.

Which score matters most for different types of credit

Mortgage lenders almost always pull all three scores and typically use the middle score for their decision. If your scores are 680, 710, and 720, the lender uses 710. Auto lenders also pull all three but may use different rules — some use the middle, some use the lowest. Credit card issuers vary widely; some check only one bureau, others check all three.

For a mortgage or auto loan, the score that matters most is whichever one falls in the middle of your three scores, because that's what the lender will see. For a credit card or personal loan, you won't know which bureau the lender checks until after you explore. This is why monitoring all three scores is useful — it shows you the range lenders might see.

How to check your TransUnion and Equifax scores for free

You are may have access to to one free credit report from each bureau per year through AnnualCreditReport.com, the official government site. This report shows the information each bureau has on file but does not include your credit score. To see your actual scores, you have a few options.

Many credit card companies now offer free credit scores to their cardholders through their online account. These scores are often from one of the three bureaus and update monthly. Some banks and credit unions also provide free scores to customers. These free scores are usually accurate but may be a proprietary score rather than the FICO score a lender will use.

If you want to see your official FICO scores from all three bureaus, you can purchase them directly from myfico.com, which is run by the company that creates FICO scores. The cost varies but typically ranges from $20 to $40 for a single score or a bundle of all three. Some credit monitoring services also offer FICO scores as part of a paid subscription.

What to do if your scores are very different

A difference of 10 to 30 points between bureaus is normal. A difference of 50 or more points suggests that one bureau has incomplete or inaccurate information. Start by getting your free credit reports from all three bureaus at AnnualCreditReport.com and comparing them side by side. Look for accounts that appear on one report but not the others, balances that don't match, or payment statuses that are different.

If you find an error — an account you don't recognize, a wrong balance, or a late payment that wasn't actually late — you can dispute it directly with the bureau. The bureau has 30 days to investigate and must correct or remove inaccurate information. You can file a dispute online through each bureau's website, by mail, or by phone. Keep records of your dispute and follow up if the bureau doesn't respond within 30 days.

If one bureau is missing accounts that appear on the others, that's usually not an error — it just means that creditor didn't report to that bureau. You can't force a creditor to report to a specific bureau, but you can contact the creditor and ask them to report to the missing bureau. Some creditors will do this if you request it.

Frequently Asked Questions

Can I improve one score without improving the others?

Partially. If you pay down a credit card balance, all three scores should improve, but by different amounts because they weight the change differently. If you dispute an error on one bureau's report, only that bureau's score will improve. Over time, as creditors report your activity to all three bureaus, your scores should move in the same direction, though they may stay at different levels.

Which score do mortgage lenders actually use?

Mortgage lenders pull all three scores and use the middle one. If your scores are 680, 710, and 720, the lender uses 710. This is why it matters to check all three — you need to know which score will be in the middle, not just your highest or lowest.

Why does my free credit score app show a different number than what I see on AnnualCreditReport.com?

Free credit score apps often show a proprietary score created by the bureau or the app company, not the FICO score that most lenders use. These scores use different formulas and can be 20 to 50 points different from your FICO score. The free report on AnnualCreditReport.com doesn't include a score at all — it's just the raw information the bureau has on file.

Should I worry if my TransUnion score is much lower than my Equifax score?

Not necessarily. Check both credit reports to see if one bureau has more negative information or errors. If the reports look similar, the score difference is likely just due to the different formulas each bureau uses. If one report has significantly more negative accounts or errors, dispute those items with that bureau.

Do lenders see all three scores or just one?

Most lenders pull all three scores, but what they do with them varies. Mortgage and auto lenders typically use the middle score. Credit card issuers might check only one bureau. Personal loan lenders vary. You won't know which bureau a lender checks until after you explore, which is why monitoring all three is the safest approach.