How Experian, Equifax and TransUnion Build Your Credit Reports

September 20, 2025
Mark Snow

The three national credit bureaus are Experian, Equifax, and TransUnion. In the United States, these three companies collect and organize data about different credit accounts to build consumer credit reports. Businesses that have a legal right to request the reports can make those requests.

Since these three companies are separate, there is no single master credit report. Knowing this fact is important. The reason is that a lender may receive different information from each of the three companies. That means the credit score from one of the companies can be different from another. Learning how credit reports are built can help a person find errors, recognize identity theft, and prepare for an official report review by a lender, landlord, or another party that is legally allowed to do so.

Key takeaways

Credit bureaus collect information and build reports. They do not approve applications or set terms of loans.
Creditors do not need to send updates about each account to all three bureaus. Because of this, the reports can differ.
A credit report has account information and inquiry information, and a credit score is a number that is generated by a scoring model from the information that is on the report.
Checking your credit reports will not impact your credit score. Reports from all three bureaus are available to check for free.
You can challenge information that is incorrect or incomplete. Accurate negative information generally cannot be removed early.

What credit bureaus do — and what they do not do

Credit bureaus are most frequently referred to as Experian, Equifax, and TransUnion, despite the official term used in the government’s consumer reporting resources being consumer reporting companies. These companies receive and match data to individuals to build their credit files. They may then provide a credit report or other risk-related information as allowable under the Fair Credit Reporting Act.

A credit report and a credit score should not be used interchangeably. A report is a record of credit activity and the current status of accounts. A score is derived from the information that is part of a report. Because there are varying credit scoring models that can be used, different versions of credit scoring models, different scoring models specific to certain products, different consumer reporting companies, and different dates of scoring, individuals can have many scores.

Credit bureaus do not determine whether a loan, lease, or other application is approved. Other businesses considering the credit report make that decision in accordance with their standards and the law. Credit bureaus do not generate a comprehensive financial profile of an individual. Income, savings, debit card purchases, and other routine transactions are examples of information that would not be considered part of a traditional credit account history.

How information reaches a credit file

Most of the account information is furnished by businesses to the bureaus, such as banks, credit unions, credit card issuers, mortgage servicers, auto lenders, and collection agencies. A business may report to only one bureau, to two bureaus, or to none of the bureaus. The timing of reporting to credit bureaus can vary, so payment and balance information can be reported to the bureaus at different times.

An example of credit report information includes:

Identification: Names, addresses, date of birth, and partial identifying numbers provided to match records. Information provided does not impact credit score.
Credit accounts: The name of the creditor, account type, account open date, original amount or credit limit, reported balance, account payment status, and account payment history.
Collections and public records: Reported collections and bankruptcy (if reported). Civil judgments and tax liens previously reported on the standard three-bureau credit reports now are excluded.
Inquiries: Who obtained a report (and for what reason, in most cases).

A credit report can be incomplete without being incorrect. An account that is only reported to Equifax could be from a source that provides data to that credit reporting company and not to the other two (Experian and TransUnion). Conversely, an account that should belong to someone else, a payment that was reported as being made after the due date when it was made on or before the due date, and inquiries that appear on the report that you do not recognize may require investigation.

Why reports and scores can differ

There can be a time delay for the credit reporting agencies to receive data. They also have their own systems to match data and link it to a consumer file. There are many factors that can cause a consumer file to be missing or mixed with other consumers’ files or placed in a completely different file (wrong name, address spelling, etc.)

Though account documentation may be similar, status or balance dates may vary. A score calculated before a card issuer sends its monthly update can differ from one calculated afterward. Balances and scoring results may also vary depending on the lender’s models, versions, and bureaus. Due to these variances, a bank or consumer app score may or may not match the score a prospective lender may consider.

Who may access a credit report

The Fair Credit Reporting Act provides for permissible purposes for which a credit report can be accessed. These purposes may include the evaluation of a credit application, the management of an account, the collection of an account, tenant screening, the evaluation of an insurance underwriting application, and certain governmental purposes. For employment reports, an employer must obtain the employee or applicant’s written permission prior to ordering the report. Report requests must not be made out of curiosity.

If a creditor takes an adverse action based in whole or in part on information in a consumer report (i.e., denied an application, offered a less favorable term), it generally must send an adverse action notice to the consumer. This notice names the consumer reporting agency and notifies the consumer of their right to obtain a free report and challenge information that is not accurate. The bureau was not the party that made the adverse decision to the consumer.

Hard inquiries, soft inquiries and “no credit check” claims

There is a difference between ‘hard’ and ‘soft’ credit checks. A ‘hard’ credit check occurs when a lender checks a credit report to evaluate loan application eligibility, while a ‘soft’ credit check occurs when you check your credit report, if a lender reviews your account, or if someone sends you a pre-approved offer. A ‘hard’ credit check can be visible to report users and may affect your credit score. A ‘soft’ credit check does not affect your credit score and is only visible to you.

Advertising language is worth evaluating. A product that claims ‘no traditional hard credit check’ could possibly still perform a ‘soft’ credit check or review a specialty consumer report, verify your identity, review your income and/or bank accounts, and perform other assessments. The ‘no traditional hard credit check’ also does not guarantee approval. Before you give your bank information and Social Security Number, verify that the company is licensed where applicable, has clear privacy practices, and has communicated its terms for the loan fully.

How long information can remain

It is worth noting that information about closed accounts may still remain. Most negative information can generally be reported for up to seven years, while bankruptcy information can be reported for up to ten years. The way the information is reported can vary depending on the event and the type of information, so an account sale or transfer does not necessarily restart the reporting period.

A dispute is for information that is inaccurate, incomplete, or doesn’t belong to you. It is not a lawful way to erase current, accurate negative information. Be wary of credit repair companies that make promises to create a new credit identity, remove accurate information, or guarantee an increase to your credit score. Consumers can dispute legitimate errors for free.

How to review all three reports

At AnnualCreditReport.com, you can request free weekly reports from all three credit bureaus (Experian, Equifax, and TransUnion). Through December 2026, you can also request up to six additional free Equifax reports during a 12-month period. Checking your own credit report is not an application for credit and will not result in your credit score going down.

Since the reports may not be totally consistent, compare all three reports instead of only checking scores. The layout of the credit reports may be different, but you should examine the following information:

names and spelling variations of your name, addresses, and other identifying information that may not be associated with you;
accounts that you have no knowledge of, accounts that appear more than once, or accounts that you are not the owner of or are not authorized users of;
incorrect balance information, credit line information, payment status, late-payment dates, or dates that the account was reported;
collections or bankruptcies that you do not have or that should not have been reported beyond the legally reportable time period;
hard inquiries or credit report requests that you did not authorize or that lack another permissible purpose.

Save each report, and record the date. Unknown accounts or requests that may relate to identity theft can be addressed through the recovery process at IdentityTheft.gov. You may consider placing a freeze on your reports through the major credit bureaus. A credit freeze does not impact your credit score. Placing a freeze on your credit reports may help prevent an identity thief from opening new accounts under your name. A freeze does not prevent all access to a report or protect an existing account from misuse.

How to dispute an error

Specify the mistake. Provide the bureau, relevant account, or inquiry, report number, if applicable, and the exact section that is in error.
Gather supporting documents. Use copies, not originals, of statements, payment confirmations, identity-theft reports, or correspondence that supports the correction.
Dispute with the bureau and the furnisher. Describe the mistake and the change you are requesting. Keep copies and confirmation receipts.
Review the result. A bureau generally must investigate and report the result, while a furnisher generally must investigate a direct dispute within 30 days. In some instances, the investigation period can extend beyond 30 days.
Address unresolved disputes. You may add a statement of dispute to the file in some cases and can submit a complaint to the CFPB after first disputing the issue with the reporting company.

Send only the personal contact and other requested information needed to process the dispute. A bureau may reject a dispute it reasonably considers frivolous or irrelevant, including one that does not identify what is being challenged, so a detailed account of the information along with supporting documentation is necessary.

Using credit-report information in a borrowing decision

While reviewing credit reports prior to applying for a loan can help discover inaccuracies, having a clean credit report does not make a loan affordable. A lender may consider many factors in making a loan decision beyond what is on the credit report, including the applicant’s income, other obligations, and the lender’s underwriting standards, along with the lender’s own policies and procedures.

Considering a lender’s disclosures provides important information to compare a lender’s fees and annual percentage rate along with the total and the number of payments required to satisfy the loan obligation and the consequences of a missed payment. Approval of a loan application is not evidence that the loan terms are safe or affordable.

Frequently asked questions

Are Experian, Equifax and TransUnion the same company?

Experian, Equifax, and TransUnion are three separate nationwide consumer reporting companies. Each has its own report access, dispute, and freeze process, and each maintains its own files and receives its own updates. Each is an independent reporting company.

Does every lender report to all three bureaus?

Not every lender reports to all three reporting companies. Furnishing information is voluntary, and a creditor may report to all three, some, or none. Ask the creditor to what reporting companies it reports.

Will looking at my credit reports affect my credit?

Checking your own credit report does not affect your credit. A request to review your own report is considered a soft inquiry.

Can a credit bureau remove negative but accurate information?

Generally, negative information can remain on your report until the reporting period is complete. A consumer has the right to dispute inaccurate, incomplete, or duplicate information, as well as information that resulted from identity theft.

Will a security freeze affect accounts I have already opened?

A freeze mainly restricts access by prospective creditors. It does not close accounts that are currently open, stop existing creditors from reviewing an account where permitted, or prevent account takeover. It is essential to continue monitoring your bank and credit accounts.