Christie Matherne, Credit Card Writer
@christie_matherne
The Costco Credit Card mainly uses Experian to check your credit when you apply, though Citibank may use TransUnion or Equifax instead, according to anecdotal evidence. So, if any of your credit reports are frozen, you should unfreeze them before applying for the card.
Key Things to Know
- The Costco Credit Card requires excellent credit.
- When you apply, Citibank will perform a hard inquiry on your credit report, which might temporarily damage your credit score by a few points.
- If you’re approved for the card, Citibank will report information about your card usage and payment history to Equifax, Experian, and TransUnion once a month.
- Your major credit reports contain nearly identical information. If one includes negative information, the other two probably will as well.
- It’s a good idea to check for any mistakes on your credit report so you can dispute them right away.
You can keep tabs on your TransUnion credit report as well as check your credit score for free, right here on WalletHub.

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