You have different credit scores because different companies use different formulas to calculate them

Your credit score is not a single number that every lender sees. Instead, three major credit bureaus—Equifax, Experian, and TransUnion—each maintain their own file on you and calculate their own scores. On top of that, lenders and credit card companies often use their own scoring models instead of the standard ones. This means you can legitimately have dozens of different credit scores, and they may not all be the same.

The most common scoring model is FICO, which ranges from 300 to 850. But FICO itself has multiple versions—FICO 8, FICO 9, FICO 10T—and each one weighs your payment history, debt levels, credit age, and other factors slightly differently. Lenders also use VantageScore, which is another scoring system entirely. A mortgage lender might pull your FICO 5 score from Equifax, while a credit card company pulls your VantageScore 3.0 from Experian. Neither score is "wrong"—they are just built on different data and different math.

Key Takeaways

  • The three credit bureaus (Equifax, Experian, TransUnion) each calculate their own score based on slightly different information in your file.
  • FICO and VantageScore are two different scoring systems, and lenders choose which one to use, so you may see both.
  • Your credit report at each bureau may contain different accounts or errors, which causes scores to differ even when using the same formula.
  • The score you see on a free credit monitoring app is often not the same score a mortgage or auto lender will pull.

Why the three bureaus have different information about you

Not every creditor reports to all three bureaus. A credit card company might report to Equifax and TransUnion but skip Experian. A medical debt collector might report to only one bureau. Over time, this creates three separate files with different accounts, different balances, and sometimes different errors.

Your payment history also gets reported unevenly. If you pay a bill late, the creditor decides which bureaus to notify. They might tell all three, or they might tell only one. A closed account might stay on one bureau's file longer than another. These gaps and timing differences mean your credit report—and therefore your score—can look different at each bureau.

Errors also accumulate differently. A fraudulent account might appear on your Equifax file but not your Experian file. A paid-off debt might still show as open at one bureau while another has already updated it. You can have a 680 score at one bureau and a 720 at another straightforward because one has an error the others do not.

The difference between FICO and VantageScore

FICO is older and more widely used by banks, mortgage lenders, and auto lenders. It weights payment history at 35 percent, amounts owed at 30 percent, length of credit history at 15 percent, credit mix at 10 percent, and new credit at 10 percent. VantageScore, created by the three bureaus together, weights these factors differently and can generate a score after just one month of credit history instead of six months.

The two systems also handle thin credit files differently. If you have very little credit history, VantageScore may give you a usable score while FICO cannot. Conversely, FICO is what most lenders actually use when deciding whether to approve you for a mortgage or car loan, so your VantageScore matters less in practice.

Within each system, there are also multiple versions. FICO 8 is the most common, but FICO 9 and FICO 10T exist and are slowly being adopted. Each version recalibrates the formula slightly. A lender might use FICO 8 for credit cards but FICO 5 specifically for mortgages. You cannot control which version a lender pulls.

Why free credit monitoring apps show a different score than lenders see

Most free credit monitoring services—whether through your bank, a credit card, or a standalone app—show you a VantageScore or an older version of FICO. They do this because it is cheaper for them to provide. But when you explore for a mortgage, auto loan, or apartment, the lender pulls a current FICO score, often FICO 8 or newer. The score you see on your phone may be 50 points higher or lower than what the lender sees.

Some lenders also use industry-specific FICO scores. Mortgage lenders use FICO scores designed specifically for mortgage lending. Auto lenders use auto-specific FICO scores. Credit card companies use their own versions. These specialized scores weight recent payment history and debt levels differently than the standard FICO 8 you might see on a monitoring app.

This is why checking your credit score on a free app should not be your only way to monitor your credit. The score you see is useful for tracking trends, but it is not the score a lender will use. You can see your actual FICO scores (the ones lenders use) through myfico.com, though you will pay a small fee. Many lenders also provide your FICO score for free when you explore.

How errors at one bureau can create score differences

If a debt collector reports a debt to only one bureau, your score at that bureau drops while the others stay the same. If someone commits identity theft and opens an account in your name, it might appear at one bureau before the others catch up. A late payment might be reported to Equifax when ready but take weeks to reach Experian.

Disputes also resolve at different speeds. You might successfully dispute an error at Equifax, but the same error could still be sitting on your Experian file. Until you dispute it there too, your Experian score will remain lower. This is why it is important to check your credit report at all three bureaus separately—not just your score, but the actual report itself.

You can request a free copy of your credit report from each bureau once per year at annualcreditreport.com. This is the official government site, not a third-party service. Checking your report does not hurt your score. Looking for errors—wrong accounts, wrong balances, accounts that are not yours—is the fastest way to explain why your scores differ and to fix the problem.

Which credit score actually matters for major decisions

For a mortgage, the lender will pull your FICO score from all three bureaus and typically use the middle score. For an auto loan, they do the same but may use a different version of FICO. For a credit card, the issuer picks one bureau and one score model—you will not know which until after you explore. For an apartment rental, the landlord might use FICO, VantageScore, or a proprietary score.

In general, assume that any lender making a major decision (mortgage, auto loan, apartment) is using a FICO score, probably FICO 8 or newer, pulled from one of the three bureaus. The score you see on a free app is almost certainly not what they will see. If you are about to explore for something important, you can pay a small fee to see your actual FICO scores at myfico.com, or you can ask the lender directly what score they use and what it was after you explore.

What to do if your scores are very different from each other

Start by getting your free credit reports from annualcreditreport.com and comparing them. Look for accounts you do not recognize, balances that are wrong, or late payments that should not be there. If you find an error, dispute it with the bureau that has the wrong information. The bureau has 30 days to investigate and correct it.

If all three reports look correct but your scores are still very different, the difference is likely just the scoring formula. A FICO score and a VantageScore can legitimately differ by 100 points or more. If one bureau has an error and the others do not, fixing that error will bring that score in line with the others.

If you are explore for a major loan or mortgage soon, focus on the FICO score, not the VantageScore you see on a free app. Pay down high credit card balances, make all payments on time, and dispute any errors you find. These actions improve your FICO score across all three bureaus. The specific version of FICO a lender uses is out of your control, but the underlying factors—payment history and debt levels—matter to all of them.

Frequently Asked Questions

Can I have a good score at one bureau and a bad score at another?

Yes. If a debt collector reports only to one bureau, or if one bureau has an error the others do not, your scores can differ significantly. This is why checking your actual credit reports at all three bureaus matters more than checking your scores alone.

Which credit score do mortgage lenders use?

Mortgage lenders pull your FICO score from all three bureaus and typically use the middle score. The specific version varies by lender, but it is usually FICO 8 or a mortgage-specific FICO score. The score you see on a free app is almost certainly not the one they will use.

Why is my credit score lower on my bank's app than on another app?

Different apps use different scoring models and pull from different bureaus. Your bank might show you a VantageScore from Equifax while another app shows a FICO score from Experian. Neither is wrong—they are just different formulas applied to different data.

Should I worry if my three FICO scores are different?

Small differences (10 to 20 points) are normal because each bureau has slightly different information. Large differences (50+ points) suggest an error on one bureau's file. Check your credit reports to find and dispute the error.

Do I need to monitor my credit score at all three bureaus?

Monitoring one score is fine for general awareness, but checking your actual credit reports at all three bureaus once a year is more important. Reports show errors that scores do not, and errors are what cause large score differences.