The fastest way to reach Citi credit card support
Citi's main customer service line for credit card holders is 1-800-950-5114. This number works for questions about your account, disputes, lost cards, payment issues, and rewards. You can call 24 hours a day, seven days a week. Have your card number or the phone number on file ready when you call.
If you prefer not to call, Citi also offers support through their mobile app and website. Log into your account at citi.com, and you can message a representative directly through the find messaging feature. Response times are typically within one business day. For urgent issues like a lost or stolen card, the phone line is faster.
You can also reach Citi by mail at the address on your statement, though this takes 7 to 10 business days for a response. For billing disputes specifically, write to the address listed in your dispute rights section on your statement — this creates a paper trail that protects you under federal law.
Key Takeaways
- Call Citi credit card support at 1-800-950-5114 any time of day or night for account questions, disputes, or lost cards.
- You can message Citi through your online account at citi.com and expect a response within one business day.
- For a lost or stolen card, calling is faster than using the app or website.
- Written disputes sent by mail create a legal record and should reference the address in your billing rights notice.
- Have your card number or account phone number ready before you call to speed up the process.
What information to have ready before you call
Citi's automated system will ask for your card number or the phone number associated with your account. If you don't have your card with you, the phone number works just as well. You'll also be asked for your date of birth or the last four digits of your Social Security number to verify your identity.
If you're calling about a specific transaction, have the date and amount ready. For disputes, know whether you're reporting an unauthorized charge, a billing error, or a quality complaint about a purchase. If you're calling about a rewards question, have your recent statement in front of you so you can reference your points balance or pending redemptions.
Reporting a lost or stolen card
Call 1-800-950-5114 when ready if your card is lost or stolen. Citi will deactivate it on the spot so no one else can use it. The representative will ask you to confirm recent transactions to make sure nothing fraudulent has happened yet. They can usually issue a replacement card that arrives within 5 to 7 business days.
If you need the card faster, ask about expedited shipping when you call — some card types offer next-business-day delivery, though this may have a fee. In the meantime, you can still use your account through the Citi app or website to make payments or check your balance.
Disputing a charge on your Citi credit card
You have two ways to dispute a charge: call Citi or write a letter. Calling 1-800-950-5114 starts the process when ready, and the representative will document your dispute in the system. However, for your legal protection, you should also send a written dispute letter to the address listed in your billing rights section on your statement.
In your letter, include your account number, the date and amount of the disputed charge, and a clear explanation of why you're disputing it. State whether you're claiming the charge is unauthorized, the merchant charged you twice, or the item arrived damaged or not as described. Send it by mail or certified mail so you have proof it was received. Citi has 30 days to acknowledge your dispute and 60 days to investigate.
While your dispute is being investigated, you don't have to pay the disputed amount. Citi will credit it back to your account temporarily. If the investigation rules in your favor, the credit becomes permanent.
Handling billing errors and payment problems
If you notice a billing error — a charge you didn't make, a duplicate charge, or an amount that doesn't match your receipt — call 1-800-950-5114 to report it. The representative can flag it in your account when ready. They'll also tell you whether you need to send a written dispute to protect your rights.
If you're having trouble making a payment, call the same number. Citi can discuss payment plans, temporary hardship options, or help you set up automatic payments so you don't miss a due date. If you've already missed a payment, the representative can explain the late fee, interest rate changes, and what you need to do to get back on track.
Using the Citi mobile app and website for support
The Citi mobile app and citi.com both have a messaging feature that lets you contact customer service without calling. Log in to your account, look for "Contact Us" or "Message Us," and type your question. You'll get a response within one business day, usually faster.
The app and website also have a searchable FAQ section and live chat during business hours. Live chat is available Monday through Friday, 8 a.m. to 8 p.m. Eastern time. For questions that aren't urgent, messaging is often easier than calling because you can include details in writing and don't have to wait on hold.
What to do if you can't reach customer service
If you're unable to reach Citi by phone or the wait time is very long, try the app or website messaging feature instead. These channels are less busy during off-peak hours, usually early morning or late evening.
If you have a complaint about how Citi handled your issue, you can file a complaint with the Consumer Financial Protection Bureau (CFPB) at consumerfinance.gov. The CFPB investigates complaints and can require Citi to respond. You can also contact your state's attorney general's office if you believe Citi has violated consumer protection laws.
Frequently Asked Questions
Can I dispute a charge through the app instead of calling?
You can start the process through the app or website messaging, but for legal protection you should also send a written dispute letter to the address on your statement. The written letter creates a record that protects you under federal law.
How long does it take to get a replacement card?
Standard replacement cards arrive within 5 to 7 business days. Some card types offer expedited delivery for an additional fee. Ask about this option when you call to report a lost or stolen card.
What happens if I miss a payment?
Call 1-800-950-5114 as soon as you realize you'll miss a due date. Citi may be able to discuss a payment plan or temporary hardship option. If you've already missed the payment, they'll explain the late fee and any interest rate changes.
Is there a fee to dispute a charge?
No. Citi does not charge you to dispute a transaction. You have the right to dispute charges under federal law, and Citi must investigate at no cost to you.
Can I change my billing address or contact information over the phone?
Yes. Call 1-800-950-5114 and a representative can update your address, phone number, or email on file. You can also make these changes yourself through the app or website under account settings.