The three bureaus

5 min read

TL;DR

The three bureaus (TransUnion, Equifax, Experian) each hold a separate copy of your credit file, and they disagree more often than you'd think.
Different issuers pull different bureaus. Chase usually Experian, Citi usually Equifax, Barclays usually TransUnion — usually.
Free credit reports from all three are available weekly at AnnualCreditReport.com. Always free, always official, no card required.

Why three files

The US credit reporting system is a competitive market. The bureaus independently collect data from lenders and don't always have the same info. A creditor who reports to all three (most big banks) usually syncs within a week or two, but smaller lenders report to only one or two bureaus, and the data differs.

Concretely: the same week, your TransUnion file might list a Discover card the Experian file doesn't show yet. Your Equifax file might still carry a closed account that Experian has already aged off.

Which bureau do major issuers prefer

This chart is directional — issuers A/B test, pull multiple bureaus for some apps, and vary decisions by region and applicant profile. Doctor of Credit and myFICO forums track pull data by state; what's true in California for Chase isn't always true in Texas.

| Issuer | Most common bureau pulled | |---|---| | Chase | Experian (most states), TransUnion (some regions) | | American Express | Experian | | Capital One | All three (multi-pull) | | Citi | Equifax (usually) | | Discover | Experian | | Bank of America | Experian, sometimes TransUnion | | Wells Fargo | Experian | | US Bank | Experian | | Barclays | TransUnion | | Synchrony | Equifax | | Comenity | TransUnion | | Navy Federal | Equifax | | PenFed | Equifax | | Apple Card (Goldman) | TransUnion | | Apple Savings (Goldman) | TransUnion | | Credit unions | Usually Equifax or TransUnion |

Capital One is the outlier: most apps pull all three bureaus, so a CapOne app burns three hard inquiries, not one.

How bureau differences affect you

FICO tri-merge for mortgages (FICO 2 at EX, 4 at TU, 5 at EQ) — lenders use the middle score. If you have a 720 / 718 / 705 split, you're a 718 for underwriting. If the lowest bureau has an error dragging you down, dispute it before applying.
Credit card freezes — if you freeze only Experian but Chase tries to pull Experian, the app is denied. See Bureau alerts, freezes, and locks.
Errors can exist on only one bureau — a collection that was resolved can stay on one file while being off the other two. Always pull all three before a major application.

Your weekly free report

AnnualCreditReport.com is the official site (created by federal law — the three bureaus are required to provide it). Not affiliated with Credit Karma, NerdWallet, or anyone else.

Free weekly from each bureau (was annual until the pandemic-era expansion became permanent).
Contains the full tradeline history — every account, opening date, balance, payment history.
Does NOT show a credit score. This is a report, not a score.
No credit card required. If a site asks for a card to show you your "free report," it's not AnnualCreditReport.com.

Pull all three once a month if you're actively optimizing. Pull all three 60 days before a mortgage or major loan application.

How disputes work

Found an error? Dispute with the bureau that shows the error, not the creditor. The bureau has 30 days (sometimes 45) to investigate and respond.

Two paths:

Online dispute via bureau's site — fastest. TransUnion/Equifax/Experian each have dispute portals. Upload supporting documents (statements showing the account was paid, police report for fraud, etc.).
Certified mail — slower but creates a paper trail if you may need to escalate to CFPB.

If the creditor confirms the error is valid, the bureau updates the file. If the creditor insists the report is correct, you can add a consumer statement (100-word note on your file) explaining your side. Statements don't affect your score but show up on human-reviewed applications.

Credit freezes, fraud alerts, credit locks

Freeze (free, federally mandated) — blocks all new creditors from pulling your file. You can temporarily lift it for a specific application window. Use when you're not actively applying.
Fraud alert (free, 1-year initial or 7-year identity theft) — requires lenders to take extra verification steps before opening new credit in your name. Less restrictive than a freeze.
Credit lock (bureau-branded product, sometimes paid) — similar to a freeze but lifted via app instead of PIN. TransUnion TrueIdentity, Equifax Lock & Alert, Experian CreditLock. The free tiers are basically freezes with a mobile UI.

See Bureau alerts, freezes, and locks for when to use each.

Which bureau to freeze first

If you can only freeze one (budget or friction reason), freeze the one your most likely next lender pulls. For most heavy card users, that's Experian — it's the most commonly pulled bureau across Chase, Amex, BofA, Wells, US Bank, and Discover.

If you have no active applications planned, freeze all three. Lifting them individually for an application is a 30-second task per bureau via the app.

Specialty bureaus (worth knowing about)

Beyond the big three, two specialty consumer reporting agencies track data that can matter:

ChexSystems — tracks checking account openings, closures, and fraud. If you've had a bank account closed for fraud or unpaid overdraft, it's here. Free annual report.
LexisNexis / C.L.U.E. — tracks insurance claims, employment background, some credit-adjacent data. Free annual report.

If you've been denied a checking account or had trouble with insurance underwriting, pull these too.

Practical takeaway

Pull all three from AnnualCreditReport.com monthly if you're optimizing, quarterly otherwise.
Dispute errors before big applications — bureaus have 30 days to resolve.
Freeze all three bureaus unless you're actively applying; lift them individually when you need to.
Different issuers pull different bureaus — don't assume what's on Credit Karma (TU + EQ) is what a Chase underwriter sees (EX).