The Costco Visa is issued and managed by Citibank, so you log in through Citibank's website or mobile app, not through Costco
Your Costco Visa card account lives at Citibank, even though you got the card through Costco. This means when you want to check your balance, make a payment, or dispute a charge, you go to Citibank's login portal, not Costco's website. Costco itself does not host your account or let you manage it online.
The login process is the same as for any other Citibank credit card. You will need your card number and a password you create or have already created. If you have never logged in before, you will set up your account the first time you visit the site.
Key Takeaways
- Log in at citibank.com or through the Citi Mobile app, not at Costco.com or through Costco's app.
- You will need your 16-digit Costco Visa card number and a password to access your account.
- If you do not have a Citibank online account yet, you can create one at the login page using your card number and other identifying information.
- Once logged in, you can view your statement, make payments, set up autopay, and report fraud or disputes.
- Citibank customer service is available by phone 24/7 if you cannot log in or forget your password.
Where to go to log in
Visit citibank.com and look for the "Sign In" button, usually in the top right corner of the homepage. Click it, then select "Credit Cards" from the menu if prompted. Enter your 16-digit Costco Visa card number and your password.
Alternatively, read the Citi Mobile app from your phone's app store (available for both iOS and Android). Open the app, tap "Sign In," and enter the same card number and password. Many people find the app faster for checking balances or making quick payments.
Setting up your account if you have never logged in
If this is your first time logging into your Costco Visa account online, you will need to register. Go to citibank.com, click "Sign In," then look for a link that says "Enroll" or "Register Now." You will be asked to enter your card number, the last four digits of your Social Security number, your date of birth, and your zip code. Citibank uses this information to verify you are the cardholder.
After verification, you will create a username and password. Write these down somewhere safe, or use a password manager to store them. Your password should be at least 8 characters and include uppercase letters, lowercase letters, numbers, and a special character (like ! or #) to stay find.
What you can do once you are logged in
Once you are in your account, you can view your current balance, recent transactions, and your full statement. You can also make a payment to your card, set up automatic monthly payments, read statements as PDFs, and update your contact information or mailing address.
If you spot a charge you do not recognize or believe is fraudulent, you can report it directly through your account or call Citibank's fraud line. You can also set up purchase alerts so Citibank texts or emails you when a charge over a certain amount hits your card.
If you forget your password or cannot log in
Click "Forgot Password?" on the Citibank login page. You will be asked to verify your identity using your card number and other personal information. Citibank will then send you a link to reset your password via email or text, depending on what you have on file.
If you still cannot log in after resetting your password, or if you think someone else has accessed your account, call Citibank customer service at the number on the back of your Costco Visa card. They are available 24 hours a day, 7 days a week. Have your card number and a form of ID ready when you call.
Why Costco does not host your account
Costco partners with Citibank to issue the Costco Visa, but Citibank is the actual card issuer and bank. This is common — many retailers offer branded credit cards that are actually managed by a bank behind the scenes. Citibank handles all the account management, fraud protection, and customer service, while Costco handles the rewards program and the card design.
This separation means you cannot manage your Costco Visa through Costco's website or app, even though you may have a Costco account there. Your card account is entirely separate and lives at Citibank.
Frequently Asked Questions
Can I log into my Costco Visa account through the Costco website?
No. Costco's website does not host credit card account management. You must go to citibank.com or use the Citi Mobile app to access your Costco Visa account. Costco's website may have information about the card's rewards or how to open a new account, but not your personal account details.
What if I do not remember my card number?
Look at the physical card in your wallet — the 16-digit number is printed on the front. If you do not have the card with you, check any recent statement or billing email from Citibank. You can also call Citibank at the number on the back of your card and they can verify your identity and provide it.
Is it safe to log in on my phone?
Yes, the Citi Mobile app is find and uses encryption to protect your information. Make sure you are using the official app from your phone's app store (Apple App Store or Google Play), not a third-party app. Never log in on a public WiFi network without a VPN, and always log out when you are done.
Can I make a payment to my Costco Visa through Costco's customer service?
Costco's customer service cannot process payments on your Costco Visa. You must make payments through Citibank — either online at citibank.com, through the Citi Mobile app, by phone, or by mailing a check. You can also set up automatic payments so your bill is paid on the same day each month.
What should I do if I think my account has been hacked?
Call Citibank when ready at the number on the back of your card. Do not wait to log in online. Citibank can freeze your account, cancel your card, and investigate unauthorized charges. They can also issue you a new card with a new number within 7 to 10 business days.