Code 55: Incorrect PIN

Decline Code 55: What 'Incorrect PIN' Means & How to Fix It

Decline code 55 means the PIN entered during the transaction does not match the PIN on file with the issuing bank. On the first occurrence it is a soft decline — the customer can try again. But the retry window is short. Most banks allow three attempts before locking the card, at which point it becomes a hard decline that requires the cardholder to contact their bank.

What Does Decline Code 55 Mean?

When a PIN-based transaction is initiated, the terminal sends the entered PIN to the issuing bank for verification. If it doesn't match what the bank has on record, the bank returns code 55. The card itself is fine. The account is active. The PIN just didn't match.

What makes code 55 different from most other decline codes is that the outcome changes depending on how many times it happens in a row. A single wrong PIN is a minor, fixable error. Three wrong PINs in succession trigger a lockout that the customer can't resolve at the terminal, no matter how many times they try.

How Many Times Can You Retry After a Code 55 Decline?

Most card networks and issuing banks allow three PIN attempts before locking the card for PIN-based transactions. That means the first two incorrect entries are effectively soft declines, and the third failed attempt crosses into hard decline territory, triggering an account lockout.

Some banks are stricter and lock after two attempts. The cardholder won't always know which limit applies to their card, and neither will the merchant.

The practical implication: one retry is reasonable. Two is pushing it. Encouraging a customer to keep guessing their PIN at your terminal is not doing them any favors.

What Happens After Too Many Incorrect PINs

Once the retry limit is exceeded, the card is locked for PIN-based transactions. This typically means the customer can no longer use the card at ATMs or for chip-and-PIN in-store purchases until the lock is cleared.

What the lockout does not affect, in most cases, is card-not-present transactions. Online purchases, phone orders, and any transaction that doesn't require PIN entry will typically still work on the same card. The lockout is specific to PIN verification.

To clear the lock, the cardholder needs to contact their issuing bank directly. Depending on the bank, this may involve identity verification followed by a PIN reset, or the bank may unlock the existing PIN without requiring a change. Either way, it cannot be resolved at the terminal and there's nothing the merchant can do to help beyond pointing the customer toward their bank.

How Merchants Should Handle Decline Code 55

1. Allow the customer one retry. A single wrong PIN is an easy mistake. Give them another attempt without making it a production.
2. Do not encourage more than two retries. After two failures, the risk of triggering a lockout on the third attempt is real. Gently suggesting they use a different payment method is kinder than watching them lock their own card at your register.
3. If the card locks, offer an alternate payment method. A different card, a digital wallet, contactless payment, or cash. The locked card isn't going to work for PIN transactions until the bank unlocks it, and that can't happen at the terminal.
4. Suggest the customer calls their bank to unlock or reset their PIN. If they're not sure of their PIN or think it may have changed, their bank is the only one who can help. The number on the back of the card is the starting point.

Frequently Asked Questions About Decline Code 55

Is decline code 55 always the customer's fault? Almost always, yes. Code 55 fires when the entered PIN doesn't match the bank's record, which is almost always a case of the customer misremembering their PIN or entering it incorrectly. The rare exception is a bank-side error where a PIN reset didn't process correctly, leaving the customer with a PIN that doesn't match what the bank has on file. If a customer is confident they're entering the right PIN and still getting a 55, calling their bank is the right move.

How many times can a PIN be entered incorrectly before the card is locked? Typically three times, though some banks lock after two. The cardholder won't necessarily know their bank's specific limit. As a general rule, treat two failed attempts as the practical ceiling before recommending an alternate payment method rather than a third try.

What should I do if my card gets locked due to too many wrong PINs? Call the number on the back of your card. Your bank can verify your identity and either unlock the existing PIN or walk you through resetting it. In most cases this can be resolved in a single call. Once unlocked, the card works normally for PIN transactions again. In the meantime, any card-not-present transaction that doesn't require a PIN will typically still go through on the same card.

Does a code 55 decline affect my credit score? No. A declined transaction, regardless of the reason, does not appear on your credit report and has no impact on your credit score. The decline happens at the authorization stage and never becomes a completed transaction, so there's nothing to report. The only thing that affects your credit score in the context of card use is your payment history, utilization, and account standing, none of which are touched by a PIN entry failure.

Related Decline Codes

Code 55 is specifically about PIN verification. These related codes cover other authentication and access failures:

• Code 75 — PIN Tries Exceeded. The direct escalation of a code 55. The retry limit has been hit and the card is locked for PIN transactions.
• Code 05 — Do Not Honor. The catch-all decline. Can sometimes follow repeated security failures.
• Code 63 — Security Violation. A broader security check failure, typically involving CVV or AVS rather than PIN.
• Code 51 — Insufficient Funds. A balance issue on an otherwise active, accessible card.
• Code 57 — Transaction Not Permitted to Cardholder. A permissions restriction rather than an authentication failure.
• Code 62 — Restricted Card. Card-level restrictions blocking a specific transaction type.
• Code 41 — Lost Card. Hard decline. Card reported lost. Do not retry.
• Code 43 — Stolen Card. Hard decline. Card reported stolen. Do not retry.