Why are my three credit scores different?
Your three credit scores differ because the bureaus — Equifax, Experian, and TransUnion — operate independently, receive different data from different creditors, update on different schedules, and feed that data into different scoring models. Gaps of 10 to 50 points are normal. Bigger gaps usually signal that one bureau is missing information or has a reporting error worth disputing.
The three bureaus are three separate companies
Equifax, Experian, and TransUnion are private companies that each collect their own credit data. They don't share databases. They don't coordinate updates. They compete with each other and with the scoring companies whose models they use.
Because they're separate, what each one knows about you depends on which creditors choose to report to them. Some lenders report to all three. Some report to two. Some report to one. A few don't report at all. That alone explains a lot of the variance.
Different bureaus see different data
A real example of how this shows up in practice:
- Your auto loan might report to Equifax and TransUnion but not Experian
- Your store credit card might report to only Experian
- A medical collection might appear on TransUnion months before it shows on the other two
- An address change might propagate to one bureau but not the others
- A dispute resolution at Experian doesn't automatically remove the item from Equifax or TransUnion
Each bureau builds its picture of your credit from a slightly different feed of information. Different inputs produce different outputs.
Different timing also matters
Creditors don't all report on the same day. Most furnishers send updates to the bureaus monthly, but each bureau receives those updates on its own schedule. If you paid down a credit card balance last week, one bureau might already reflect it, another might not show the change for two more weeks.
A score pulled today vs. a score pulled in ten days can differ purely because of which updates have processed between those pulls.
Different scoring models weight things differently
On top of the data differences, there's the model that turns the data into a number. The most common are:
- FICO 8 — the most widely used in lending overall
- FICO 9 — newer, treats medical collections more leniently
- FICO Auto Score — used by auto lenders, weights auto loan history more heavily
- FICO Bankcard Score — used by credit card issuers, weights revolving history more heavily
- VantageScore 3.0 and 4.0 — used by many free score services like Credit Karma
Each model has different formulas, different weights, and different ways of handling specific items. A score from one model on one bureau can differ from a score from another model on the same bureau, even with identical underlying data.
When you see different scores in different places, you're often comparing different models, not just different bureaus.
How big a gap is normal
A gap of 10 to 50 points across bureaus is typical. Bigger gaps — 60, 80, 100 points — usually point to a specific cause:
- A negative item appearing on one bureau but not the others
- A positive account being reported to only one or two bureaus
- A long-standing error on one bureau's file that the others got right
- A mixed file at one bureau — meaning someone else's information has been merged into yours
Bigger gaps are usually worth investigating. The bureau showing the lower score often has the item worth disputing.
What this means for disputes
Because each bureau handles its own data, disputes are bureau-specific. If a wrong item appears on all three reports, you have to dispute it with each bureau. A correction at one doesn't propagate.
CreditRefresh runs disputes bureau by bureau as the default. The platform reads all three reports, identifies issues on each one separately, and drafts letters targeted to the specific bureau where the issue appears. The same item showing on multiple bureaus generates a letter for each bureau, because that's how the dispute system actually works.
Don't chase a single number
It's tempting to focus on one score and treat it as your "real" credit score. There isn't a single real score — there are many, and the one that matters most is the one the specific lender you're applying to actually pulls. The way to improve outcomes across the board isn't to optimize for one number. It's to make sure the data underlying all three reports is accurate, complete, and free of FCRA violations. That's what dispute work is for.
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The standard FICO credit score is built from five factors: payment history (35%), credit utilization (30%), length of credit history (15%), credit mix (10%), and new credit (10%). Payment history and utilization together account for two-thirds of the score, which is why disputing inaccurate late payments and incorrect balances tends to move scores the most.
At minimum, once a year per bureau — and right now you can pull free reports weekly from all three bureaus at annualcreditreport.com. Annual review catches errors before they hit major applications. Step up to monthly during active dispute work, and every two weeks after identity theft. CreditRefresh also pulls automatically.
You can dispute any item on your credit report that's inaccurate, incomplete, outdated, or unverifiable — including wrong balances, payments marked late incorrectly, accounts that aren't yours, items past the 7-year window, and reporting that violates the FCRA. You cannot dispute debts you legitimately owe and that are reported accurately. CreditRefresh won't generate letters without grounds.
Section 611 of the Fair Credit Reporting Act is the federal law that gives you the right to dispute inaccurate or incomplete information on your credit reports and requires the credit bureaus to investigate. Bureaus have 30 days from receipt to investigate, contact the data furnisher, and notify you of the outcome. If they can't verify the disputed information, they have to delete or correct it.