The account number is the second set of digits on the bottom left of your check
On a printed check, three groups of numbers appear along the bottom in magnetic ink. Reading left to right, you see the routing number first (nine digits), then your account number (typically eight to twelve digits), then the check number (three to four digits on the right). Your account number is always in the middle of these three groups.
The account number identifies your specific checking account at your bank. It is unique to you and that account alone. When you give someone your account number for a wire transfer, direct deposit setup, or automatic payment, you are giving them the same number printed on every check you have from that account.
The routing number and account number together tell the banking system where your money is and which account to move it from or deposit it into. The check number is just for your own record-keeping and does not affect how the payment moves through the system.
Key Takeaways
- Your account number is the middle set of digits on the bottom of a check, between the routing number and the check number.
- Account numbers are typically eight to twelve digits long and are unique to your specific checking account.
- You can use the account number from your check for direct deposits, wire transfers, and automatic bill payments.
- If you cannot locate a check, you can find your account number on your bank statement, in your online banking portal, or by calling your bank.
How the three numbers work together
The routing number tells the banking system which bank holds the account. The account number tells it which account at that bank. The check number is straightforward a sequential identifier for that particular check and appears nowhere else in the payment process.
When a check is deposited or cashed, a machine reads the routing and account numbers in magnetic ink and routes the payment to the correct bank and account. The check number is recorded for your records but does not determine where the money goes. This is why you can write checks out of order or skip numbers without affecting how they clear.
Finding your account number without a check
If you do not have a check in front of you, your account number appears in several other places. Log into your online banking portal—most banks display it prominently on the account overview or account details page. Your monthly bank statement also lists it, usually near the top or in a section labeled "Account Information."
You can also call your bank's customer service line and provide your name and identifying information. They will read your account number to you over the phone. If you are setting up direct deposit at work or school, your employer or institution can often look it up for you if you provide your routing number and the name on the account.
Why you need both the routing and account number
A routing number alone does not tell the bank which account to use—it only identifies the bank itself. An account number alone does not work either, because the bank needs to know which of its thousands of accounts you mean. Together, they form a complete address for your money.
When you set up direct deposit, for example, your employer needs both numbers. When you request a wire transfer, the bank needs both. If you give only one, the transaction will fail or be delayed while the bank contacts you for the missing information.
What happens if you share your account number
Sharing your account number with legitimate businesses—your employer for direct deposit, your utility company for automatic bill pay, your bank for loan applications—is safe and necessary. These transactions require the account number to work.
However, your account number should not be shared with people you do not know or trust, and it should not be posted publicly online. Someone with your account number and routing number could potentially set up unauthorized automatic withdrawals from your account, though most banks have fraud protections in place. If you suspect unauthorized activity, contact your bank when ready.
Account numbers on different check types
Personal checks, business checks, and cashier's checks all display the account number in the same location—the bottom left area in the middle of the three number groups. The format and length may vary slightly depending on your bank, but the position is consistent.
If you have multiple accounts at the same bank, each one has its own unique account number. A savings account, money market account, or second checking account will each have different numbers printed on their respective checks or statements, even though they share the same routing number.
Frequently Asked Questions
Is my account number the same as my card number?
No. Your debit card has its own card number printed on the front. Your checking account has a separate account number that appears on checks and statements. They are linked to the same account but are different numbers used for different purposes.
Can someone withdraw money if they only have my account number?
They would need both your account number and your routing number to set up a withdrawal. Even with both, most banks require additional verification or authorization before allowing automatic withdrawals. If you notice unauthorized activity, contact your bank when ready to dispute it.
Why are there different lengths of account numbers between banks?
Banks design their account numbering systems independently. Some use eight digits, others use ten or twelve. The length does not affect how the system works—the bank's computer recognizes its own format and processes the payment correctly regardless of length.
Do I need to memorize my account number?
You do not need to memorize it, but it is useful to have it written down somewhere safe or to know where to find it quickly. Keep a record separate from your checks in case you need it for direct deposit, wire transfers, or other transactions.