Why your three credit scores don't match, and when to worry

Say you pull your FICO 8 from all three bureaus on the same afternoon: 641 from Experian, 668 from Equifax, 655 from TransUnion. Same person, same day, same scoring model, and a 27-point spread between the lowest and highest. It feels like someone made a mistake.

Usually nobody did. The scores are three honest readings of three different files. The useful question is whether the difference comes from something harmless, like timing, or from something on one report that shouldn’t be there. Telling those apart takes one sitting with your three reports.

Three bureaus, three separate files

Equifax, Experian and TransUnion are separate companies. Each keeps its own file on you, built from whatever lenders, collectors and public sources send to that bureau. When a score is calculated, it reads only the file at that one bureau.

myFICO lists the main reasons the files drift apart:

• Not every lender reports everywhere. “All of your credit information may not be reported to all three credit bureaus.” Credit Karma makes the same point: some lenders report to all three, others to only one or two.
• Some data is unique to one bureau. One bureau “may have unique information captured on a consumer that is not being captured by the other two.”
• The same fact can be stored differently. The bureaus “may record, display or store the same information in different ways.”
• Name variations and bad identifiers split your file. Variations in your name, or incomplete or inaccurate Social Security numbers and addresses, can cause “fragmented or incomplete files.”

Any one of these is enough to move one score and not the others.

Timing: each bureau got a different snapshot

Lenders “report credit information to the credit bureaus at different times,” myFICO says, and the CFPB notes that a score can depend on “even the day when it was calculated.” Follow one card through a single week and you can watch a timing gap open and close.

Say you have one credit card with a $5,000 limit. Last month it reported a $500 balance. This month you put a $3,000 car repair on it, and the statement closes on the 3rd showing $3,000. You pay $2,400 on the 4th.

On the 6th, bureau X shows 60% utilization ($3,000 ÷ $5,000) while bureau Y still shows 10% ($500 ÷ $5,000). The scores split because one file is a few days behind. By the 9th, both show $3,000. Your $2,400 payment on the 4th doesn’t appear at either bureau until next month’s statement reports a $600 balance (12%). These dates are an example; real issuers and bureaus follow their own schedules.

A timing gap like this needs no action. It also explains why checking your scores the day after a big payment rarely shows the payment at all.

Same model, tuned to different data

Even when two scores carry the same name, like FICO 8, they aren’t identical formulas. myFICO says each bureau’s FICO scoring system “was designed to optimize the predictive value of their unique data.” The model reads the same kinds of information, but the bureaus’ data differ enough that FICO builds for each one.

Scores also have time-based features. myFICO notes that “the passage of time can result in score differences due to model characteristics that have a time based component.” An account crossing an age milestone or a late payment getting older can nudge one score on a different day than another.

And sometimes the scores you’re comparing aren’t even the same model. “Not all credit scores are FICO scores,” as myFICO puts it. Credit Karma, for example, shows VantageScore 3.0 from TransUnion and Equifax. If you line that up against a FICO 8 from Experian, you’re comparing two models and two files at once. Why your free app score doesn’t match your lender’s covers that mismatch.

When a gap is a red flag

A gap deserves attention when it traces back to a specific item that appears on one report and not the others. These are the ones worth chasing:

An account that isn’t yours on just one report can be a sign that someone else’s information got merged into your file. Our guide to mixed files covers how that happens. Accurate information that only one bureau has is not an error, and disputing it to “even out” your reports isn’t legitimate.

How to track down your own gap

Finding the cause means comparing the three reports line by line, in this order.

1. Pull all three reports on the same day. They’re free every week at AnnualCreditReport.com.
2. Pull scores from one model. Compare FICO 8 to FICO 8, or VantageScore 3.0 to VantageScore 3.0. Mixing models adds noise.
3. Line up the accounts. List every account on each report side by side. Note accounts missing from a report and accounts that appear on only one. How to read your credit report shows where each field sits.
4. Compare balances and reporting dates. If the only difference is a newer balance on one report, it’s timing.
5. Check negatives one by one. Lates, collections and public records that appear on only one report are the usual reason for a large gap.
6. Dispute what’s inaccurate. Only dispute information that’s wrong, incomplete or unverifiable, and include your evidence.

If you’re applying for a mortgage, the gap matters in a specific way, because the lender will usually use your middle score. The middle score calculator shows which of your three numbers would count.