Equifax, Experian, and TransUnion: How the Three Credit Bureaus Differ

The short answer

Equifax, Experian, and TransUnion are three independent for-profit companies that each maintain their own credit report on you. They don't share data with each other. Creditors report to whichever bureau (or bureaus) they choose.

This is why your three credit reports often look different — and why your three credit scores can differ by 20-50 points for the same person on the same day.

How the bureaus came to exist

Each bureau started as a regional credit reporting company in the early 20th century. Equifax (Atlanta), Experian (Costa Mesa, CA — formerly TRW), and TransUnion (Chicago) consolidated thousands of local bureaus over decades. They're still separate companies, with separate databases, separate APIs, and separate dispute processes.

Why your three credit reports differ

Several reasons:

1. Some creditors only report to one or two bureaus. Smaller lenders, store cards, and some auto lenders skip one bureau entirely.
2. Reporting timing differs. Creditors report to different bureaus on different days.
3. Mistakes happen at different bureaus. A late payment might get reported correctly to two bureaus and incorrectly to the third.
4. Accounts age out at different times if the original delinquency date got recorded slightly differently.

Why your three credit scores differ

In addition to the data differences, the scoring models themselves vary:

• FICO has separate scoring models for each bureau (FICO 8 Equifax, FICO 8 Experian, FICO 8 TransUnion). Same formula, but tuned to each bureau's data structure.
• Mortgage lenders use older FICO models (FICO 2 Experian, FICO 4 TransUnion, FICO 5 Equifax). These are stricter than current models.
• Auto lenders often use FICO Auto Score versions that weight auto-loan history more heavily.
• Credit card lenders sometimes use FICO Bankcard Score which emphasizes revolving credit.

A given person can easily have a 720 from Experian and a 690 from Equifax on the same day — neither is wrong.

What lenders pull when they pull your credit

By industry:

• Mortgages: Tri-merge — all three bureaus, with the lender using the middle of your three scores.
• Auto loans: Often Experian; sometimes Equifax. Usually the auto-enhanced FICO.
• Credit cards: Varies by issuer. Capital One often pulls all three. Most others pull one.
• Personal loans: Usually one bureau.
• Apartments: Often Experian or TransUnion.

If you're shopping for a mortgage, the middle score across the three bureaus is what determines your rate.

Why this matters for credit repair

If you're disputing items, you have to dispute them with each bureau separately. An item that only reports to one bureau only needs one dispute. An item reporting to all three needs three.

Disputing with one bureau does NOT trigger an investigation at the others. Each bureau owns its own data and runs its own investigation.

Free reports — your right under federal law

You're entitled to one free credit report from each bureau every 12 months under federal law. The official site is AnnualCreditReport.com — anything else charging you for these reports is selling you something you're entitled to free.

Since 2020, the bureaus have offered weekly free reports in addition to the annual one. That's a useful tool — you can pull your three reports right now to see what's actually being reported about you.

What to do next

Pull all three reports for free at AnnualCreditReport.com. Look for:

• Items that appear on one bureau but not the others (selective reporting opportunity)
• Items reported with different details across bureaus (dispute opportunity)
• Items past the 7-year limit (auto-deletion failure)
• Accounts you don't recognize (potential identity theft)

If you find issues that need disputing across multiple bureaus, book a free consultation. We handle each bureau separately.