Your credit card PIN is a four-digit code that proves you own the card when you use it at an ATM or in person at a store

A PIN stands for Personal Identification Number. It works like a password for your card. When you insert your card into an ATM or a store's payment machine, the PIN is what tells the bank that you — not someone who stole the card — are the one authorizing the transaction.

The PIN is separate from your card number and expiration date. Someone could have all that information and still not be able to withdraw cash or make a purchase without the PIN. That separation is what makes the PIN your main defense against fraud when you're using the card in person.

Not every credit card transaction requires a PIN. Online purchases, phone orders, and many in-store purchases use your signature or a contactless tap instead. But whenever you need cash or want extra security, the PIN is what you use.

Key Takeaways

  • Your PIN is a four-digit code you create or receive from your bank that you enter at an ATM or payment terminal to prove you own the card.
  • You set your own PIN when you first activate your card, or you can change it anytime through your bank's website, app, or by calling customer service.
  • A PIN protects you against fraud because a thief with your card number cannot use it without knowing this code.
  • You need your PIN to withdraw cash from an ATM, and some stores let you use it instead of a signature for added security at checkout.

How to set or change your PIN

When you first receive your credit card, your bank usually sends you a temporary PIN in the mail or shows it to you in your online account. You should change this to a number only you know before you use the card.

The easiest way to set a new PIN is through your bank's mobile app or website. Log in to your account, find the card settings or security section, and look for "Change PIN" or "Set PIN". You'll enter your temporary PIN, then create a new four-digit code. The change takes effect immediately.

If you can't find the option online, call the customer service number on the back of your card. A representative can walk you through the process or set a PIN for you over the phone. Some banks also let you set a PIN at an ATM by inserting your card and selecting the PIN option from the menu.

What happens if you forget your PIN

If you forget your PIN, you can reset it the same way you set it the first time — through your app, website, or by calling customer service. Have your card and a form of ID ready. The bank will verify your identity, then let you create a new PIN right away or send you a temporary one.

Until you reset it, you won't be able to withdraw cash from an ATM or use the card at a payment terminal that requires a PIN. You can still use the card online or by phone, and you can still make purchases in stores that accept contactless or signature payments.

PIN security: what not to do

Never write your PIN down or share it with anyone, including bank employees or store workers. Your bank will never ask for your PIN. If someone calls or emails claiming to be from your bank and asks for your PIN, it's a scam.

Avoid using obvious numbers like your birthday, your address, or sequential digits like 1234. These are the first codes a thief will try if they get your card. Choose something random that only you would know.

When you enter your PIN at an ATM or store, shield the keypad with your hand so cameras or people nearby can't see the numbers. If a keypad looks loose, cracked, or out of place, don't use it — it could be a skimming device designed to steal your PIN.

PIN versus signature: when each one is used

At most stores, you choose whether to use a PIN or a signature when you pay with a credit card. Debit cards usually require a PIN by default, but credit cards are more flexible. If the terminal offers both, you can pick whichever you prefer.

Using a PIN adds a layer of security because the transaction is verified by something only you know. A signature can be forged, but a PIN cannot — if someone uses your card with the correct PIN, the bank assumes it was you. For that reason, some people prefer to use their PIN even at stores where a signature would work.

Online and phone purchases never use a PIN. Instead, they use your card number, expiration date, and CVV (the three-digit code on the back). That's why it's important to keep those numbers private and only enter them on secure websites.

What to do if someone uses your card without your PIN

If you see a transaction on your statement that you didn't make, contact your bank immediately. Tell them the transaction was unauthorized. The bank will investigate and, if they confirm it was fraud, they'll reverse the charge and send you a new card.

If your card was physically lost or stolen, call your bank right away to report it. They'll cancel the card so no one can use it, even if they somehow know your PIN. You'll receive a replacement card in the mail within a week or two, and you'll set a new PIN for it.

Federal law limits your liability for unauthorized credit card charges to $50, and most banks waive that fee entirely if you report the fraud quickly. The sooner you call, the better protected you are.

Frequently Asked Questions

Can someone use my credit card if they know my PIN?

Only if they also have the physical card. A PIN alone is useless without the card itself. If your card is lost or stolen, call your bank immediately to cancel it so the PIN becomes worthless.

Is my PIN the same as my online banking password?

No. Your PIN is for in-person transactions at ATMs and stores. Your online banking password is separate and protects your account on the bank's website or app. Never use the same code for both.

Do I need a PIN for every credit card I own?

Each credit card has its own PIN. When you get a new card, you'll set a new PIN for it. You can use the same four-digit code for all your cards if you want, but many people prefer different PINs for extra security.

What if I enter my PIN wrong three times at an ATM?

The ATM will usually lock you out temporarily to prevent someone from guessing your PIN. Wait a few minutes, then try again. If you still can't remember it, call your bank to reset it.

Can I use my credit card PIN at any store?

Most stores let you choose between PIN and signature at checkout. Some older terminals or smaller stores may only accept signatures. If a terminal asks for a PIN and you don't have one set, you can use a signature instead.