YOUR DATA LIVES IN THREE PLACES — AND THEY DISAGREE
You apply for a mortgage. The lender pulls your credit. Your score: 712 at Equifax, 698 at TransUnion, 724 at Experian. The mortgage lender uses the middle score: 712.
The difference between those three numbers could be the difference between one interest rate and another — and tens of thousands of dollars over the life of the loan.
This is not a glitch. It is how the system was built. Three independent companies. Three separate databases. Three different scores. Understanding why they differ is how you manage all three strategically.
THE RULE
Each bureau operates independently — different data, different scores, often different errors. Freezing credit, disputing errors, and monitoring must be done at all three bureaus separately. Action at one bureau does nothing at the others.
WHAT THE THREE BUREAUS ARE
Equifax, Experian, and TransUnion are private, for-profit companies. They are not government agencies. They collect credit data from lenders who voluntarily report to them, package it, and sell access to lenders, employers, and landlords.
Key fact: Lenders are not required by law to report to all three bureaus. Some report to all three. Some report to two. Some report to only one. This is why the same account can appear on Equifax and Experian but be completely absent from TransUnion.
This creates real consequences:
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Your scores at the three bureaus can differ by 20-60 points
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An error at one bureau does not exist at the others
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A dispute at one bureau does not fix the same issue at another
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A credit freeze at one bureau leaves the other two open
HOW EACH BUREAU DIFFERS
Equifax
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Headquartered in Atlanta, GA
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Known for: Equifax Score (proprietary), FICO models 2 and 5
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Notable: 2017 breach exposed 147 million Americans' data — a major reason to freeze credit proactively
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Freeze: equifax.com
Experian
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Headquartered in Dublin, Ireland (global operations)
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Known for: Offers free FICO 8 score at experian.com — the most accessible free FICO source
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Also offers Experian Boost: lets you add utility and streaming payments to your Experian report for a potential score increase
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Freeze: experian.com
TransUnion
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Headquartered in Chicago, IL
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Known for: Common pull for auto lenders
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Also offers employment screening services
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Freeze: transunion.com
THE MORTGAGE SCORE RULE
When you apply for a mortgage, lenders pull all three bureaus and use the middle score — not the average, not the highest, the middle.
If your three scores are 712, 698, and 724 → the mortgage lender uses 712.
If two borrowers are on the loan (co-signers), the lender uses the lower of the two middle scores. One person's weak score can determine the rate for both.
Strategy: Before applying for a mortgage, pull all three reports. Find the lowest score. Fix whatever is dragging it down. The goal is to raise the floor, not just the ceiling.
WHAT TO DO
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Freeze your credit at all three bureaus — separately. Go to equifax.com, experian.com, and transunion.com. Each freeze is free and takes 5 minutes. This prevents anyone from opening credit in your name.
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Pull all three reports at AnnualCreditReport.com — they are listed separately. Review each independently.
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Dispute errors at the specific bureau where they appear. Log into that bureau's dispute portal or send a certified letter.
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Use Experian Boost if you pay utilities or streaming services — free, and it adds qualifying bill payments — utilities, phone, and streaming — to your Experian file only. The effect varies from person to person, and a lender who pulls Equifax or TransUnion won't see it.
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Before any major application — check all three scores, not just one. The lender may pull a bureau you are not monitoring.
WHAT NOT TO DO
Never freeze at only one or two bureaus. Different lenders pull different bureaus. One unfrozen bureau is still a wide-open door for identity theft.
Never assume a dispute at one bureau fixes the others. Each bureau operates its own investigation process. If the same error appears on all three, file three separate disputes.
Never rely on Credit Karma as your only monitoring tool. Credit Karma shows Equifax and TransUnion VantageScore — it does not show Experian at all, and VantageScore differs from FICO. You are missing one-third of your credit picture entirely.
YOUR SITUATION
If you have never frozen your credit:
This is your highest-priority action after this lesson. Takes 15 minutes total across all three bureaus. Prevents the most common form of identity theft completely.
If you are planning to apply for a mortgage in the next 6-12 months:
Pull all three reports now. Find your middle score. Find the weakest factor dragging it down. You have time to fix it before the application.
If you find the same account error on multiple bureaus:
File three separate disputes — one at each bureau where the error appears. Use AnnualCreditReport.com to confirm which bureaus show the error.
If you used Experian Boost and your score did not move:
Boost only affects Experian. If a lender pulls Equifax or TransUnion, the boost has no effect. Know which bureau your lender pulls before relying on Boost.
REAL EXAMPLE
Keisha was buying a car. The dealer quoted her 9.8% APR. She asked which bureau they pulled — TransUnion. She had never looked at her TransUnion report specifically.
She pulled it that evening. She found a $280 medical collection that did not appear on her Equifax or Experian reports. It was 4 years old. She negotiated a pay-for-delete (note: major collectors and original creditors increasingly resist deletion; get any agreement in WRITING before paying — verbal promises are worthless): paid $280, got a written deletion agreement, reported it to TransUnion.
30 days later, the collection was gone. Her TransUnion score went from 641 to 694.
She returned to the dealer. Same car. New score. New rate: 6.9% APR.
Over 60 months: $1,840 in savings from pulling the one bureau the dealer actually used.
YOUR ACTION FOR TODAY
Open three tabs: equifax.com, experian.com, transunion.com. Freeze your credit at all three right now. It is free, reversible in minutes, and the single most protective action you can take for your credit profile. Store your PINs in a password manager.