What Is a Credit Bureau? How Equifax, Experian, and TransUnion Work.

A credit bureau, known in federal law as a consumer reporting agency, is a private company that tracks how you borrow and repay money. It turns that record into credit reports and sells them to lenders, landlords, insurers, and employers. Equifax, Experian, and TransUnion are the three nationwide bureaus in the United States.

Most people picture one shared file that someone, somewhere, keeps accurate. There are three separate files, and the FTC’s national accuracy study found that 1 in 5 consumers had an error on at least one of them (FTC, 2013).

What do Equifax, Experian, and TransUnion actually do?

The three bureaus collect account data from lenders, sort it into a file for each consumer, and sell access to that file. When you apply for a loan, the lender buys your report, usually with a score built from it. It uses both to price your application or turn it down.

The Fair Credit Reporting Act defines a consumer reporting agency at 15 U.S.C. § 1681a(f) and governs nearly everything the bureaus do. Under § 1681e(b), every bureau must follow reasonable procedures to assure maximum possible accuracy in each report it sells.

Each bureau keeps its own database of tradelines, inquiries, collection accounts, and public records. The three compete with each other. They do not share tradeline data.

We cover the three nationwide bureaus here. Specialty consumer reporting agencies, such as banking history or tenant screening databases, follow the same federal law but track different records.

Are Equifax, Experian, and TransUnion government agencies?

No. All three are for-profit corporations traded on public stock exchanges. You never sign up with a bureau. Lenders supply the data, and federal law sets what the bureaus owe the people they report on, since there is no customer agreement between you and them.

Two federal regulators watch the industry. The Consumer Financial Protection Bureau supervises the largest consumer reporting agencies directly, and the Federal Trade Commission enforces the FCRA alongside it.

The public has noticed. Credit or consumer reporting made up about 88% of all complaints the CFPB received in 2025 (CFPB, 2025 Consumer Response Annual Report). No other consumer financial product comes close.

Where do credit bureaus get their information?

Nearly all bureau data comes from furnishers. These are the banks, card issuers, auto lenders, mortgage servicers, student loan servicers, and collection agencies that report account status to one or more bureaus, typically once a month. Here is who sends what.

• Lenders and servicers. They report balances, limits, and payment status on open accounts.
• Collection agencies. They report defaulted debts they own or service.
• Public records. These supply bankruptcy filings. Tax liens and civil judgments were removed from bureau reports in 2017 and 2018.
• Inquiries. These are created automatically whenever someone pulls your report.

Collections are the entry most people dread. About 77 million Americans, 35% of adults with a credit file, have debt in collections on their report (Urban Institute, 2025).

Rent, utility, and phone payments generally do not appear unless you enroll in a reporting service. They also show up if the account defaults and lands in collections.

What terms should you know before reading a bureau file?

Six words carry most of a credit report. Learn these and the rest of the file reads plainly.

Why is your credit report different at each bureau?

Reports differ because furnishing is voluntary. A community bank might report to one bureau, a national card issuer to all three, and a small collector to none. Reporting dates differ too, so a balance captured mid-cycle rarely matches across the three.

Our own member files show how uneven this gets. In CreditRefresh’s September 18, 2026 analysis of paying-member data, the average member carries 30 negative tradeline entries across the three bureaus. At each member’s bureau reporting the most distinct negative accounts, the count averages 11.6. The same account often appears at more than one bureau, and a negative entry is not automatically inaccurate.

The differences matter because a lender often pulls only one report. An error, or a mixed file that blends two consumers’ records, can sit unnoticed at one bureau until it blocks an application.

How do the three bureaus compare?

The three nationwide bureaus do the same legal job and owe you identical duties under the FCRA. They differ mainly in history, size, and the side businesses built on their databases.

Who turns a bureau file into a credit score?

Scoring companies do, using formulas applied to the data in your file. The bureaus hold the data, and firms like FICO and VantageScore turn it into a 3-digit number. FICO scores are used in about 90% of U.S. lending decisions (FICO, 2026).

Your score changes with the file it reads. The FICO Score runs from 300 to 850, and the same person can carry a different score at each bureau because each keeps its own file (FICO). That is why an error at one bureau can quietly price you out of a loan the other two files would have gotten you.

How do credit bureaus make money?

Bureaus earn most of their money selling consumer data to businesses. You are the subject of the product, and the business is the paying customer. That setup explains much of how the industry behaves.

• Reports and scores. Sold to lenders, insurers, landlords, and employers.
• Prescreened lists. Sold as marketing lists for credit and insurance offers.
• Business tools. Analytics, fraud prevention, and identity checks sold to companies.
• Consumer subscriptions. Credit monitoring and score products sold directly to you.

What duties does a bureau owe you under the FCRA?

Congress passed the FCRA in 1970 to regulate an industry consumers cannot opt out of. The law puts five specific, enforceable duties on every consumer reporting agency.

What happens when you dispute an item with a bureau?

The bureau must forward your dispute to the furnisher and finish a reinvestigation within 30 days under § 1681i. If the furnisher cannot verify the item, the bureau must delete or correct it. It then sends you the updated results.

The bureaus route disputes through e-OSCAR, an automated system that shrinks each dispute into a short code. Both bureaus and furnishers owe a reasonable, independent investigation, and that one which just repeats the furnisher’s answer can break the FCRA (FCRA Section 611(a)(1)(A) and Section 623(b); Cushman v. Trans Union, 3d Cir. 1997).

Many people have to go around again. About 90% of consumers complaining about a bureau said they had already disputed the problem with that bureau directly (CFPB, FCRA Section 611(e) report, 2025).

What they complain about is telling. Of the 3,482,718 complaints recorded in the CFPB’s public Consumer Complaint Database under “Incorrect information on your report” from July 2025 through June 2026, 66.9% said the information belonged to someone else. Complaints are unverified consumer allegations, and the CFPB ties much of the recent surge to credit repair organizations and automated filing.

How do you get a free report from each bureau?

Federal law entitles you to free file disclosures from each nationwide bureau through AnnualCreditReport.com, the official source created under § 1681j. The bureaus now offer free reports through that site weekly, per FTC guidance.

You also get a free report after any adverse action, such as a credit denial, and when you place a fraud alert. Reading all three reports side by side is the only way to catch bureau-specific errors.

Do credit bureaus decide who gets approved for credit?

No. A bureau supplies data and scores. The lender sets its own approval rules, chooses which bureau to pull, and makes the call. Two lenders can read the same report and reach opposite answers.

This matters when you are denied. The adverse action notice names the bureau whose report was used, yet the decision belongs to the lender. The bureau’s legal job is the accuracy of the file, nothing more.

Can you sue a credit bureau?

Yes. Section 1681o allows suits for actual damages caused by negligent FCRA violations. Section 1681n allows statutory damages between $100 and $1,000, plus punitive damages, for willful violations, and attorney fees are recoverable under both.

Most people start with a dispute and a complaint to the CFPB, which forwards complaints to the bureau and requires a response. Lawsuits usually follow only after a bureau fails to fix a documented error.

Which Tool Should Work Your Three Bureau Files?

Once you know each bureau keeps its own file, the choice comes down to who reads all three and who sends the letters. Here is how the options compare on price, on what that money buys against bureau errors, and on how many bureaus each one reaches.

Every price is that company’s own published rate, read off that company’s own site on September 15, 2026. Trustpilot scores and review counts as published on September 24, 2026.

A free app that sends you toward lenders brings its own risk to your file. One reviewer, Eduardo F., left Credit Karma a 1-star Trustpilot review on September 14, 2026: “Credit Karma gets people to apply for loans or credit cards with outstanding approval odds which I believe to be a complete lie. So they make me hurt your credit score with hard inquiries, when in actuality you have 0 approval odds, not outstanding.”

How CreditRefresh Reads All Three Bureau Files and Drafts a Letter for Each Error

Three separate files mean three places an error can hide, and CreditRefresh reads Equifax, Experian, and TransUnion together to find them. We flag items that look inaccurate, incomplete, unverifiable, or too old to report. Then we draft a print-ready FCRA dispute letter for each item you pick. You review and sign every letter before anything goes out.

Follow-up pulls show what changes after a mailed dispute. In CreditRefresh’s September 18, 2026 member-data extract, 2.3% of disputed bureau-level items in mailed rounds had a recorded outcome. Within that subset, 47.9% were no longer reported on a newer pull of the same bureau, while 52.1% remained reported with a changed balance, status or negative flag.

CreditRefresh comes with Refresh Monitoring at $49.99 a month, with no setup fee, no per-dispute charge, and no contract. Mail the letters yourself, or send a round through RushMail for a small per-letter fee. We track each letter and the bureau’s response against the 30-day window. The bureaus decide every dispute outcome, and your score depends on the rest of your file.

Frequently Asked Questions

Which credit bureau is the most important?

None ranks above the others. It depends on which report a given lender pulls. Mortgage lenders have long pulled all three, while many card issuers and auto lenders pull one, and the choice varies by lender and region.

How many credit bureaus are there?

Three nationwide bureaus dominate consumer lending, and dozens of specialty consumer reporting agencies cover banking history, tenant screening, insurance claims, and employment. The CFPB publishes a list of these agencies each year.

Do the bureaus share information with each other?

Not routinely. Tradeline data stays inside each bureau’s own database. Narrow exceptions exist: an initial fraud alert placed at one bureau must be passed to the other two, and the prescreen opt-out system is run jointly.

Does disputing an error at one bureau fix it at the other two?

No. Each bureau reinvestigates only its own file under § 1681i. If the same wrong account shows at Equifax and TransUnion, you dispute it at both.

Can I remove accurate information from a bureau report?

No. The FCRA only requires deletion of information that is inaccurate, unverifiable, or too old to report. Accurate negative items age off on the legal schedule, seven years for most items and ten for Chapter 7 bankruptcy.

Why did a lender pull a different bureau than I expected?

Lenders pick bureaus based on cost, data coverage in their market, and their own models. Nothing in federal law lets you choose which bureau a lender uses, so all three files need to be accurate.

Do Equifax, Experian, and TransUnion keep business credit reports too?

Business credit reporting is a separate product from your personal file. The FCRA rights covered above, including the 30-day reinvestigation, apply to consumer reports about individuals.

Last reviewed: June 2026

This article is for educational purposes only and does not constitute legal or financial advice. The Fair Credit Reporting Act and related regulations are complex, and outcomes depend on individual circumstances. Consumers with specific questions about their credit reports or rights under federal law should consult a licensed attorney or contact the Consumer Financial Protection Bureau directly.

CreditRefresh reads your Equifax, Experian, and TransUnion files side by side and drafts an FCRA dispute letter for each item that looks wrong.

Check all three of your bureau files →