Experian, Equifax, TransUnion: What’s the Difference Between the Three Credit Bureaus

What is a credit bureau, in simple words?

A credit bureau is a private company that keeps records of your debts. Who you borrowed from, how much, and whether you paid it back on time: it is all there. Banks, car dealerships and phone carriers send in the data. The bureau puts it all into one file: your credit report.

The bureau does not decide whether you get a loan. It only stores information, and the bank makes the decision. A credit score is a three-digit number; in the most popular models, it ranges from 300 to 850. It is calculated from the data in your report.

The three nationwide credit bureaus in the US

What is in each bureau’s report:

• Personal information: your name, addresses, date of birth and sometimes your employer.
• Accounts: credit cards, car loans, student loans and mortgages, with the limit, balance and date opened.
• Payment history: whether you paid on time every month.
• Collections: debts that were handed over to a collection agency.
• Inquiries: who checked your history and when.

There are also small specialty bureaus, for example for bank accounts or rentals. But when people talk about credit history, they almost always mean the big three. You can read about the others in our article Credit Bureaus Beyond the Big Three.

What is the difference between Experian, Equifax and TransUnion?

Experian, Equifax and TransUnion are not the government, and they are not one office with three signs on the door. They are three separate private companies. They compete like three cell phone carriers, and each one has its own database.

• Equifax is the oldest of the three. It was founded in 1899 in Atlanta, Georgia.
• TransUnion was founded in 1968 in Chicago, Illinois.
• Experian is an international company headquartered in Dublin, Ireland; its main US office is in California.

What matters more for you is this: each lender decides where to report data. It makes a separate agreement with each bureau. Nobody requires it to report to all three.

Large banks usually report to all three bureaus. But a small credit union (a cooperative bank for its members) may work with only one or two. Local auto lenders and stores that sell on installment plans often do the same. Sometimes a lender does not report anywhere at all.

Why is my score different at each bureau?

Your score is calculated from the data in your report. If the data at the three bureaus is different, the numbers will be different too. Here are the main reasons:

• Different sets of accounts. A lender reports to one or two bureaus, so the third one simply does not have that account.
• Different update dates. Lenders send data about once a month, each on its own schedule. One bureau already sees your new balance, another does not.
• Different inquiries. When you apply, the bank often checks just one bureau. A hard inquiry (a note that your credit was checked because you applied) will show up only there.
• An error at just one bureau. Someone else’s debt, a wrong late payment or a duplicate account often sits in one report and is missing from the other two.
• Different personal information. If a bureau mixed up your address or a similar name, someone else’s entry can get “stuck” to your file.

The second reason is different scoring formulas. We cover them in a separate article on FICO and VantageScore. Here we are only talking about the data.

The highest score is at Experian, but that does not mean it is the “right” one. Yes, it shows a lower card balance and no one else’s debt. But it is also missing her good car loan. A bank that checks Experian simply does not see her 14 months of careful payments. We see this a lot in reviews at Excalibur Credit Solutions: a big gap between bureaus usually comes down to one or two entries.

Which bureau does the bank check?

There is no single rule. The bank decides for itself which bureau to look at. The choice can depend on the type of loan, your state and even the specific application. One bank pulls Experian, another pulls TransUnion, and a third checks two bureaus at once for a large limit.

So don’t trust lists online that say things like “Bank X always checks Equifax.” They go out of date quickly.

With mortgages, the rule is clearer. As of 2026, for a standard mortgage, the lender (the company that gives you the mortgage) orders reports from all three bureaus. Out of the three scores, it uses the middle one: not the highest, not the lowest, but the one in between. For Kristina, that would be 688, between 671 and 702.

Where and how can you get your report from all three bureaus?

Free score apps usually show data from one or two bureaus, and even then not in full. To compare, you need all three full reports.

Credit monitoring services give you all three reports at once, and they keep watching your credit history. We recommend SmartCredit, and if it does not work for you, IdentityIQ or MyScoreIQ. Checking your own report is a soft inquiry, so it does not cost you any points. For step-by-step instructions, see our guide to the three-bureau report.

Don’t look only at the three numbers at the top. Scroll down to the list of accounts. That is the first place Excalibur managers look. Each entry there is usually shown in three columns: Experian, Equifax, TransUnion. An empty column or different amounts jump out right away.

Freezes and fraud alerts: at each bureau or just one?

Here, too, each bureau works on its own.

A credit freeze stops the bureau from sharing your report with new lenders. It becomes much harder for a scammer to open a card in your name: the bank will not see your history and will most likely say no. A freeze is free. It does not affect your score, and your current cards keep working as before. Before you apply for something yourself, you can lift it online or by phone, and it takes no more than an hour.

The key point: you place a freeze at each bureau separately. Froze Experian and Equifax but forgot about TransUnion? A scammer will go to a bank that checks TransUnion. Here is the order:

1. On the first bureau’s website or app, find Security Freeze or Credit Freeze. That is the freeze.
2. Verify your identity: they usually ask for your SSN, address and date of birth.
3. Save your login, password or PIN. Without them, lifting the freeze takes much longer.
4. Do the same at the other two bureaus.
5. Before applying for credit, temporarily lift the freeze, either at all bureaus or only at the one the bank will check.

A fraud alert is a warning to banks placed right on your report. The idea is simple: “Before you give credit, make sure this person really filed the application.” It is also free and lasts one year. You place it at one bureau, and that bureau passes it on to the other two. But to remove it, you have to go to each bureau separately.

An error at only one bureau: what should you do?

The bureaus do not forward your disputes to each other. If the error is at Equifax, you need to dispute it with Equifax. A dispute with Experian will not fix it, because that entry is not even there.

An empty column is not always an error. First, call the lender and ask where it reports data. It only works with two bureaus? That is its right, and there is nothing to dispute. But if it says it reports to all three and the entry is missing, ask it to send the data again.

An inaccurate entry is a different story. Then you need a dispute: the bureau must recheck it with the lender that sent it. This usually takes 30⁠–⁠45 days. If the lender admits the error, it must correct the data at every bureau it reports to. But check all three reports afterward anyway.

That is exactly what Kristina did. The credit union confirmed that it only reports to Equifax and TransUnion, so the empty Experian column was not an error. Then she placed a fraud alert and a freeze at all three bureaus. And she disputed the collection that wasn’t hers only with Equifax.

Everything Kristina did, you can do yourself: the bureaus do not charge for disputes. If you don’t have time to compare three reports, Excalibur Credit Solutions can take it on. We will send a dispute only where an entry is inaccurate, outdated or unverified. Results vary.