Costco Credit Card Phone Numbers by Issue Type
Costco runs two separate phone lines for credit card issues, and which one you call depends on what you need. The main Costco Customer Service line is 1-800-955-9060, which handles general account questions, billing disputes, and lost or stolen cards. For fraud-related concerns — unauthorized charges, suspected identity theft, or compromised card numbers — call the dedicated fraud line at 1-888-868-2622.
Both lines are staffed during Costco's standard business hours. Have your card number, membership number, and the last four digits of your Social Security number ready before you call. Wait times vary by time of day and season, but calling early in the morning on a weekday typically means shorter holds.
If you are calling about a Costco Anywhere Visa card (the physical card issued by Citi), you may be routed to Citi's customer service team depending on the nature of your question. The representative who answers will direct you to the right department if your call needs to transfer.
Key Takeaways
- Call 1-800-955-9060 for account questions, billing issues, lost cards, and general credit card support.
- Call 1-888-868-2622 if you need to report fraud, unauthorized charges, or suspect your card information has been compromised.
- Have your card number, membership number, and the last four digits of your Social Security number ready before calling.
- Early morning calls on weekdays typically have shorter wait times than afternoons or weekends.
What You Can Handle Over the Phone
Most credit card issues can be resolved in a single call. You can report a lost or stolen card and request a replacement, dispute a charge you do not recognize, update your billing address or contact information, and ask about your current balance or recent transactions. The representative can also explain your rewards balance, answer questions about how points are earned, and discuss payment options if you are carrying a balance.
If you need to close your Costco credit card account, you can do that by phone as well. The representative will confirm that you want to close the account, check for any remaining balance, and explain what happens to your rewards points. Some members prefer to do this in person at their local Costco warehouse, which is also an option.
When to Call the Fraud Line Instead
The fraud line exists because card fraud requires faster action than a standard customer service call. If you see a charge you did not make, notice your card is missing, or suspect someone has your card number, call 1-888-868-2622 when ready. The fraud team can freeze your account right away, which stops new charges from going through while they investigate.
Fraud calls are prioritized over other customer service requests, so you will typically reach someone faster on this line. The representative will walk you through what happened, document the unauthorized charges, and issue you a new card with a different number. They can also place a fraud alert on your account if you believe your personal information has been compromised beyond just the card itself.
What Happens After You Call
For routine issues like address changes or balance questions, the call ends when the representative confirms the change or provides the information. For disputes or fraud reports, you will receive written confirmation in the mail within a few business days. Keep this documentation in case you need to reference the case later.
If your issue requires investigation — such as a disputed charge that the merchant contests — Costco and Citi have up to 60 days to complete the process. You will not be responsible for the disputed amount during this time. The representative will give you a case number and explain what to expect next, including whether you need to provide additional documentation.
Alternatives to Calling
Not everyone prefers phone support. You can manage many account issues through the Costco website by logging into your account, though the options are more limited than what a phone representative can do. You can also visit your local Costco warehouse and speak to a member service representative in person, which works well for straightforward requests like address changes or account closures.
For written communication, you can mail a dispute letter to Costco, though this takes longer than calling. The phone line remains the fastest way to handle urgent issues like fraud or a lost card, since the representative can take action when ready rather than waiting for mail to arrive.
Preparing for Your Call
Gather these items before you dial: your Costco credit card, your Costco membership card or membership number, and the last four digits of your Social Security number. If you are calling about a specific charge, have the transaction date and amount ready. If you are reporting fraud, write down which charges are unauthorized so you can describe them clearly.
Have a pen and paper nearby to write down any case numbers, reference numbers, or next steps the representative gives you. If the call gets disconnected, you will have this information to reference when you call back. Most representatives will also offer to email you a summary of the call, though this is not may provide for all issue types.
Frequently Asked Questions
What are the hours for Costco credit card customer service?
Costco Customer Service operates during standard business hours, typically 6 a.m. to 10 p.m. Pacific time, seven days a week. The fraud line operates on the same schedule. Hours may vary on holidays, so if you are calling on a major holiday, expect possible delays or reduced availability.
Can I dispute a charge without calling?
You can initiate a dispute by mail, but calling is faster and allows the representative to document your claim when ready. If you call, the process usually moves more quickly because the representative can ask clarifying questions and enter the dispute into the system right away rather than waiting for written documentation to arrive.
What if I cannot reach anyone after waiting on hold?
If you are disconnected or the line is full, try calling back during off-peak hours — early morning or late evening typically have shorter waits. You can also visit a Costco warehouse in person to handle many issues, or check the Costco website to see if your question can be answered through your online account.
Do I need to call if I just want to check my balance?
No. You can check your balance anytime by logging into your Costco account online or by calling the automated phone system. The automated system does not require speaking to a representative and is available 24/7, making it faster for straightforward balance checks or recent transaction history.
Will Costco call me back if I leave a message?
Costco does not offer callback options for credit card support. You must call back and wait on hold. However, wait times are usually shorter if you call during early morning hours on a weekday, so try calling at a different time rather than waiting for a callback.