The three major credit bureaus are Equifax, TransUnion, and Experian. These are the nationwide consumer reporting agencies that collect your payment history, track how much credit you have and use, and compile that data into credit reports that lenders, landlords, and employers review when making decisions about you. Beyond these three, a handful of specialty and business credit bureaus also exist, each serving a narrower purpose.
The Three National Credit Bureaus
Equifax, TransUnion, and Experian each independently gather information about your credit accounts, payment behavior, and public records like bankruptcies. They receive data from banks, credit card issuers, auto lenders, mortgage servicers, and collection agencies. Each bureau then packages that data into a credit report and generates a credit score.
Because each bureau collects data independently, your reports won’t always match. A lender might report your payments to Experian and Equifax but not TransUnion, or a collection account might show up on one report before the others. That’s why checking all three matters.
Here’s a quick overview of each:
- Equifax is headquartered in Atlanta and has been operating since 1899. It maintains credit files on more than 800 million consumers worldwide and also runs a business credit division.
- Experian is based in Dublin, Ireland, with major U.S. operations in Costa Mesa, California. It provides both consumer and business credit reports and also offers identity protection services directly to consumers.
- TransUnion is headquartered in Chicago and operates in over 30 countries. Like the other two, it offers credit monitoring products alongside its core reporting business.
Specialty Consumer Reporting Agencies
Beyond the big three, specialty consumer reporting agencies collect narrower types of data that don’t always appear on a standard credit report. These agencies focus on specific areas of your financial life, and their reports can affect your ability to open a bank account, rent an apartment, or get insurance.
Common types of specialty reports include:
- Banking history: Agencies like ChexSystems and Early Warning Services track your checking and savings account history, including bounced checks, overdrafts, and accounts closed for cause. Banks often check these reports before approving a new account.
- Rental history: Several agencies compile records of evictions, unpaid rent, and lease violations. Landlords and property management companies use these when screening tenants.
- Insurance claims: Databases like the Comprehensive Loss Underwriting Exchange (CLUE) track your car insurance claims and homeowners or renters insurance claims. Insurers review these when setting premiums or deciding whether to offer coverage.
You have the same right to request reports from specialty agencies as you do from the big three. If a company denies you based on a specialty report, the adverse action notice must tell you which agency supplied the data, and you can request a free copy within 60 days.
Business Credit Bureaus
If you own a business, a separate set of bureaus tracks your company’s creditworthiness. The three primary business credit bureaus are Dun & Bradstreet, Experian Business, and Equifax Business.
Dun & Bradstreet is the most widely recognized in this space. It assigns a PAYDEX score ranging from 0 to 100, based largely on how quickly your business pays its bills. Experian Business uses its Intelliscore, also on a 1 to 100 scale, which factors in payment timeliness, trade references, and public records like liens or judgments. Equifax Business provides similar reporting. These scores influence whether suppliers extend trade credit, what terms lenders offer on business loans, and how potential partners evaluate your company’s reliability.
Business credit files are not automatically linked to your personal credit, though lenders for small businesses often check both.
How to Get Your Credit Reports for Free
Federal law entitles you to one free credit report every 12 months from each of the three national bureaus. The only authorized source is AnnualCreditReport.com, which you can also reach by calling 1-877-322-8228 or mailing the Annual Credit Report Request Form to Annual Credit Report Request Service, P.O. Box 105281, Atlanta, GA 30348-5281.
If you request online, you get access immediately. Phone and mail requests are processed and mailed to you within 15 days.
The three bureaus have also permanently extended a program that lets you check your report from each bureau once a week for free through AnnualCreditReport.com. On top of that, Equifax is offering six additional free reports per year through 2026 via the same site, giving you even more frequent access to that particular report.
You’re also entitled to a free report outside the normal cycle if any of the following apply:
- You receive an adverse action notice (a denial of credit, employment, insurance, or another benefit based on your credit report), as long as you request it within 60 days
- You’re unemployed and plan to look for work within 60 days
- You’re receiving public assistance
- Your report is inaccurate due to identity theft or fraud
- You have a fraud alert on your file
Why Your Reports Differ Across Bureaus
No law requires creditors to report to all three bureaus, and many don’t. A credit card issuer might send updates to Experian and TransUnion but skip Equifax. A medical collection might land on one report months before it appears on another, or never appear on a third at all. Timing differences also play a role, since each bureau may receive updated account information on different dates within the billing cycle.
This is why a mortgage lender typically pulls all three reports and uses the middle score. It’s also why reviewing just one report can give you an incomplete picture. Staggering your free weekly checks across bureaus, checking a different one each week or two, gives you near-continuous monitoring without paying for a service.