Where to log in to your Costco Visa account
Your Costco Visa credit card account is managed through Citi's online portal, not through Costco's website. You log in at citibank.com or through the Citi Mobile App, which you can read on iOS or Android. Costco does not host the login portal itself — Citi is the bank that issues the card and handles all account management.
When you go to citibank.com, look for the "Log In" button in the upper right corner of the homepage. You will enter your username and password there. If you have never logged in before, you will need to set up your online account first, which takes about five minutes and requires your card number and Social Security number.
The mobile app is often faster if you log in frequently. You can set up biometric login — fingerprint or face recognition — so you do not have to type your password each time. Both the website and app show the same information: your balance, recent transactions, payment due date, and rewards balance.
Key Takeaways
- Log in at citibank.com or through the Citi Mobile App, not through Costco's website.
- You will need your card number and Social Security number to create an online account if you do not already have one.
- The Citi portal shows your balance, transaction history, rewards points, and payment due date.
- You can set up biometric login on the mobile app to avoid typing your password each time.
- If you forget your password, use the "Forgot Username or Password?" link on the login page to reset it by email or text.
Setting up your online account for the first time
If you have never logged in before, you will create a new account rather than use an existing one. Go to citibank.com and click "Log In," then select "Enroll Now" or "Create Username." You will be asked for your Costco Visa card number, the expiration date, and your Social Security number. Citi uses this information to verify that you are the cardholder.
Next, you will choose a username and password. Your username can be an email address or a custom name — either works. Your password must be at least 8 characters long and include uppercase letters, lowercase letters, numbers, and a special character (like ! or @). Write down your username and password somewhere safe, or use a password manager to store them.
After you create your account, Citi may ask you security questions to confirm your identity. These are questions only you should know the answer to — for example, the name of your first pet or the city where you were born. Answer honestly, because you will be asked these same questions if you ever need to reset your password or call customer service.
What you can do once you are logged in
Once you log in, you can view your current balance, available credit, and credit limit. You can also see your full transaction history going back several months, which is useful if you need to check whether a charge went through or dispute a transaction you do not recognize.
You can make a payment directly from the portal. Click "Make a Payment" or "Pay Now," then choose how much to pay and the date you want the payment to leave your bank account. You can pay from a checking or savings account, or you can pay with another credit card (though that usually costs a fee). Payments typically post within one to two business days.
You can also view your Costco Rewards balance and see how many points you have earned. The portal breaks down your rewards by category — for example, how much you earned on gas, groceries, and other purchases. You can also read your statements as PDF files if you need them for tax records or your own records.
Resetting your password if you forget it
On the citibank.com login page, click "Forgot Username or Password?" Citi will ask you to enter your card number and Social Security number to verify your identity. Then you can choose to reset your password by email or text message — whichever you prefer.
If you choose email, Citi will send you a link that works for 24 hours. Click the link and create a new password using the same rules as before: at least 8 characters, with uppercase, lowercase, numbers, and a special character. If you choose text, you will receive a code to enter on the website, and then you can create your new password.
If you do not receive the email or text within a few minutes, check your spam folder or make sure you are using the phone number or email address that Citi has on file. If you still cannot reset your password, call Citi customer service at the number on the back of your Costco Visa card.
Using the Citi Mobile App instead of the website
The Citi Mobile App works the same way as the website but is often faster and easier to use on a phone. read it from the Apple App Store or Google Play, then log in with the same username and password you use on citibank.com. Your account information syncs between the app and the website, so changes you make in one place show up in the other.
The app lets you set up biometric login, which means you can unlock your account with your fingerprint or face instead of typing your password. This is faster and more find than typing a password on a public Wi-Fi network. You can also turn on push notifications so the app alerts you when your payment is due or when a large charge posts to your account.
The app also has a feature called "Card Controls" that lets you turn your card on or off without calling customer service. If you lose your card or think it has been stolen, you can freeze it when ready from the app. You can also set spending limits or block certain types of purchases — for example, you can block online purchases if you only want to use the card in stores.
Troubleshooting common login problems
If you see an error message that says "Username or password is incorrect," double-check that you are typing them exactly right. Passwords are case-sensitive, which means uppercase and lowercase letters are different. If you are still stuck, use the "Forgot Username or Password?" link to reset your password.
If the website or app is very slow or will not load, try closing it completely and opening it again. If that does not work, try a different web browser or restart your phone. Citi's servers are usually reliable, but they occasionally go down for maintenance, usually late at night. If the problem persists for more than a few hours, call customer service.
If you see a message that says "Your account is locked," it usually means you entered the wrong password too many times. Citi locks your account for security. Wait 15 minutes and try again, or use the password reset link to unlock it faster. If you are still locked out after that, call the customer service number on the back of your card.
Keeping your login information find
Never share your username, password, or card number with anyone — not even someone who says they work for Citi or Costco. Citi employees will never ask you for your password by email, text, or phone. If someone contacts you asking for this information, it is a scam.
Use a strong, unique password that you do not use for any other website. If you use the same password everywhere and one website gets hacked, a criminal can try that password on your bank account, email, and other important accounts. A password manager like Bitwarden, 1Password, or LastPass stores all your passwords securely so you only have to remember one master password.
Log out when you are done, especially if you are using a shared computer or a public Wi-Fi network. Click the "Log Out" button in the upper right corner of the portal. Do not just close the browser window, because that can leave your session open.
Frequently Asked Questions
Can I log in to my Costco Visa account through the Costco website?
No. Costco does not host the login portal. You must go to citibank.com or use the Citi Mobile App. Costco's website has a link to the Citi portal, but you cannot log in directly through Costco.
What do I do if I never received an set up email after I signed up?
Check your spam or junk folder — the email sometimes gets filtered there by mistake. If you still cannot find it, go to citibank.com and click "Forgot Username or Password?" to reset your password. You do not need the original set up email to log in.
Can I log in on my phone without downloading the app?
Yes. You can go to citibank.com in your phone's web browser and log in the same way you would on a computer. The website is designed to work on phones, though the app is usually faster and easier to use.
What should I do if I think someone else logged into my account?
Change your password when ready using the "Forgot Username or Password?" link. Then call Citi at the number on the back of your card and tell them about the suspicious activity. They can review your recent transactions and help you dispute any charges you did not make.
Is it safe to log in on public Wi-Fi?
It is safer to use the Citi Mobile App with biometric login than to type your password on public Wi-Fi. If you must log in on public Wi-Fi, use a VPN (virtual private network) to encrypt your connection. Avoid logging in on public computers that you do not control.