No, your member number and account number are not the same thing, though they are closely related and sometimes overlap. Your member number identifies you as a person at your credit union, while your account number identifies a specific account you hold, like checking, savings, or a loan. The confusion is understandable because many credit unions build your account numbers using your member number as the base, with extra digits tacked on to distinguish each account.
What Each Number Does
Your member number is assigned when you first join a credit union. It represents your overall relationship with that institution and stays the same for as long as you’re a member, no matter how many accounts you open or close over the years. Think of it as your personal ID at that credit union.
Your account number, on the other hand, identifies one specific account. If you have a savings account, a checking account, and a car loan at the same credit union, each one has its own account number. These are assigned as you open each account.
This two-tier system is a credit union feature. Traditional banks typically just assign a separate account number for each account you open, with no overarching “member number” tying them together.
How the Two Numbers Connect
At most credit unions, your account number is actually your member number plus a short suffix that identifies the specific account type. For example, if your member number is 12345678, your savings account might be 12345678-001 and your checking account might be 12345678-002. Some credit unions use a letter prefix like “S” for savings (12345678-S01), while others add digits to the beginning rather than the end.
This is why many people assume the numbers are identical. If you only have one account, and you glance at your statement, the member number at the top and the account number listed next to your balance look nearly the same. The only difference might be a two- or three-digit suffix you could easily overlook.
Which Number to Use When
The distinction matters most when you need to give your number to someone else, like an employer or a company processing a payment.
Use your account number (the full number with the suffix) when you’re setting up direct deposit with your employer, authorizing automatic bill payments, linking your account to a payment app, or mailing in a deposit or loan payment. The account number tells the receiving system exactly which account the money should go into or come out of. For direct deposit and electronic transfers, you’ll also need your credit union’s nine-digit routing number, which identifies the institution itself.
Use your member number when you’re calling or visiting your credit union for help, enrolling in online banking for the first time, or verifying your identity with the credit union’s customer service system. The member number pulls up your entire profile, giving staff a view of all your accounts at once.
If you use just your member number where a full account number is required, an electronic transfer could fail or land in the wrong account. This is the most common problem people run into when the two numbers get mixed up.
Where to Find Each Number
Your member number typically appears at the top of your paper or electronic statement, often labeled “Member Number” or “Member ID.” Your account numbers appear in the body of the statement, next to each account’s balance and transaction history.
On a physical check, the account number is printed along the bottom. Reading left to right, you’ll see three sets of numbers: the nine-digit routing number first, your account number second (typically 8 to 12 digits), and the check number third. On some checks the account number and check number swap positions, but the routing number is always first and always exactly nine digits, which makes it easy to identify.
In online banking, you can usually find your full account number by clicking into the details or settings of a specific account. Some credit unions mask part of the number on the main dashboard for security, so you may need to click a “show full number” link or similar option.
Formatting for External Services
When you enter your account number into an employer’s direct deposit form or a third-party financial app, the formatting can trip you up. Credit unions often display account numbers with dashes or letters (like 12345678-S01), but most external systems expect only digits. In that case, you’d drop the dash and any letters, entering something like 12345678001 or even 123456781 if your credit union tells you to remove unnecessary zeros.
If you’re unsure how to format your number, call your credit union and ask specifically: “What account number should I give my employer for direct deposit?” They deal with this question constantly and can give you the exact string of digits to use.