Your member number is a code your bank uses to identify you as a customer of that specific bank
A member number is a unique identifier that some banks assign to you when you open an account. It is not the same as your account number. Think of it this way: your account number identifies which specific account you are using (you might have a checking account and a savings account, each with its own number), while your member number identifies you as a person who banks there. Not all banks use member numbers — some rely only on account numbers — but many do, especially credit unions and smaller regional banks.
You will see your member number on statements, debit cards, and in online banking. It is usually a shorter number than your account number, often between 6 and 10 digits. Banks ask for it when you call customer service, visit a branch, or set up online access because it speeds up the process of finding your records in their system.
Key Takeaways
- Your member number identifies you as a customer at your bank, while your account number identifies a specific account you hold there.
- Member numbers are most common at credit unions and community banks, though large national banks may use them too.
- You can find your member number on your debit card, bank statements, or by logging into online banking.
- Providing your member number to customer service helps the bank locate your records faster, but it is not required for every transaction.
Where to find your member number
Your member number appears in several places. Check your debit card first — it is often printed on the front or back, sometimes labeled as "Member ID" or "Customer Number." If your card does not show it, look at your most recent bank statement, usually in the upper right corner or near your name and address.
If you use online banking, log in and look for account information or profile settings. Most banks display your member number prominently on the dashboard or in a section labeled "Account Details" or "My Information." You can also call your bank's customer service line and ask them to confirm it — they will need to verify your identity first, usually by asking for your Social Security number or account number.
When banks ask for your member number
Customer service representatives ask for your member number to pull up your account quickly. When you call the bank's main line, you might hear an automated system ask for it before connecting you to a person. This saves time because the bank's computer can start locating your records while you are still on hold.
You may also be asked for it when you visit a branch in person, though the teller can usually find you by name and account number if you do not have it handy. Some banks ask for it when you set up online banking for the first time, or when you call to report a lost card or dispute a transaction. In most cases, if you do not know your member number, you can provide your account number instead — it takes a few extra seconds, but the bank can still help you.
Member number versus account number
These two numbers serve different purposes, and it is worth understanding the difference. Your account number is specific to each account you hold. If you have a checking account and a savings account at the same bank, each one has its own account number. Your member number is tied to you as a person, not to a specific account. It stays the same whether you have one account or five.
When you need to receive a wire transfer or set up direct deposit, you will use your account number, not your member number. When you call the bank's general customer service line, they may ask for your member number first to identify you, then ask which account you are calling about. Both numbers appear on your statements, so you can keep them together for reference.
Security and your member number
Your member number is not as sensitive as your Social Security number or PIN, but you should still treat it with reasonable care. It is printed on documents and cards that you may carry with you, so it is not a secret. However, do not share it with people who call you claiming to be from your bank — legitimate banks will never ask you to confirm sensitive information in response to an unsolicited call.
If you are concerned that someone has your member number and may try to access your account, contact your bank directly using the phone number on the back of your debit card or on your statement. Do not use a phone number from an email or text message, as those could be fraudulent. Your bank can review your account for suspicious activity and help you find it if needed.
What to do if you cannot find your member number
If you have looked on your card, statement, and online banking and still cannot locate it, the simplest solution is to call your bank. Have your account number and a form of identification ready. The customer service representative will confirm your identity and provide your member number. This usually takes less than a minute.
You can also visit a branch in person and ask a teller to write it down for you. Some banks will email it to you if you request it through online banking. Once you have it, write it down somewhere safe — many people keep it with their other banking information or in a password manager.
Frequently Asked Questions
Is my member number the same at every bank?
No. Each bank assigns its own member numbers to its customers. If you bank at two different institutions, you will have a different member number at each one. The numbers are not shared between banks.
Can someone use my member number to access my account?
Not on its own. Your member number helps the bank identify you, but accessing your account also requires your PIN, password, or other verification. Treat it like you would your account number — not secret, but not something to hand out carelessly.
Do I need my member number to use my debit card?
No. You only need your debit card number, expiration date, and CVV to make purchases. Your member number is used for banking services like calling customer service or setting up online access.
What if my bank merged with another bank?
Your member number may change during a merger. The bank will notify you of any changes and update your debit card and statements. If you are unsure whether your number has changed, call the bank or check your most recent statement.
Can I request a different member number?
Most banks do not allow customers to change their member numbers, as these are assigned by the bank's system. If you have a specific reason for wanting to change it, contact your bank directly to ask about their policy.