The account number is the second set of digits on the bottom of your check, printed between the routing number and the check number
Look at the bottom left of any check. You will see three groups of numbers printed in magnetic ink. The first group (usually nine digits) is your routing number. The second group, which comes next, is your account number. This is the number that identifies your specific bank account. The third group, on the far right, is the check number.
Your account number is typically 10 to 12 digits long, though the length varies by bank. It appears on every check you write from that account. If you need to give someone your account number for a direct deposit, wire transfer, or automatic payment, this is the number to provide.
The account number is unique to your account at your bank. Two people with accounts at the same bank will have different account numbers. This number, combined with your routing number, tells the banking system exactly where to send or pull money.
Key Takeaways
- The account number is the middle set of digits on the bottom of your check, between the routing number on the left and the check number on the right.
- Account numbers are typically 10 to 12 digits long and are unique to your specific bank account.
- You will need your account number whenever you set up direct deposit, authorize automatic payments, or provide banking details to another person or organization.
- The same account number appears on every check from that account, so you can find it on any check you have written.
Why banks print the account number on checks
Banks print your account number on every check so that the receiving bank knows which account to debit when the check clears. Without this number, the banking system would have no way to connect the check to your specific account, even though your name appears on the front.
The magnetic ink used to print these numbers allows sorting machines to read them automatically. This is why the numbers on the bottom of a check look different from the printed text on the front — they are designed to be machine-readable, not just human-readable.
How to read the three number groups on a check
The bottom of a check always displays three distinct groups of numbers in this order from left to right:
| Position | Name | Number of Digits | What It Identifies |
|---|---|---|---|
| First (far left) | Routing number | 9 digits | Your bank and the specific branch |
| Second (middle) | Account number | 10–12 digits | Your individual account at the bank |
| Third (far right) | Check number | 4–6 digits | The specific check you are writing |
Some checks may have additional numbers printed elsewhere, such as a code for the Federal Reserve district or other bank-specific identifiers, but the three groups at the bottom in magnetic ink are the standard format used by all U.S. banks.
When you need to provide your account number
You will be asked for your account number in several common situations. Direct deposit from an employer or government payment requires your account number so the money goes into the correct account. Setting up automatic bill payments, transferring money between accounts at different banks, and receiving wire transfers all require your account number.
If you are sending a check to someone and they ask for your banking information, they are asking for your routing number and account number — not the check number. The check number is specific to that one check and is not needed for banking transactions.
When you provide your account number to someone, you are also giving them the ability to set up automatic withdrawals from your account. Only share your account number with organizations you trust, such as your employer, your bank, or a utility company you pay regularly.
Locating your account number if you do not have a check
If you do not have a check in front of you, you can find your account number in several other places. Your bank statement, whether printed or online, displays your account number at the top or in the account summary section. Your debit card may also have your account number printed on it, though not all banks print this information on the card itself.
The fastest way to find your account number is to log into your online banking portal or mobile app. Your account number is almost always visible on the main account page or in the account details section. You can also call your bank's customer service line and provide your name and identifying information, and they will give you your account number over the phone.
Protecting your account number
Your account number is sensitive information. While it is printed on every check you write, and checks are not private documents, you should still avoid sharing your account number unnecessarily. Never provide your account number in response to an unsolicited email, text message, or phone call, even if the sender claims to be from your bank.
Your bank will never ask you to confirm your account number via email or text. If someone contacts you claiming to be from your bank and asks for this information, hang up or delete the message and call your bank directly using the number on the back of your debit card or on your bank statement.
If you believe your account number has been compromised, contact your bank immediately. They can monitor your account for unauthorized activity and issue you a new account number if necessary, though this is rare.
Frequently Asked Questions
Is the account number the same as the check number?
No. The account number identifies your bank account, while the check number identifies that specific check. The check number appears on the far right of the bottom line and also in the top right corner of the check. You need your account number for banking transactions, but the check number is only relevant to that one check.
Can someone use my account number to steal money from my account?
Your account number alone is not enough to withdraw money from your account. A person would also need your routing number and authorization from you or your bank to set up a withdrawal. However, you should still protect your account number and only share it with trusted organizations. If you suspect fraud, contact your bank immediately.
What if I cannot find the account number on my check?
The account number should always appear on the bottom of a check in the middle position, between the routing number and check number. If the numbers are faded or unclear, you can find your account number on your bank statement, in your online banking portal, or by calling your bank's customer service line.
Do I need my account number to deposit a check?
No. When you deposit a check at an ATM or through mobile deposit, the machine or app reads the routing number and account number from the check itself. You do not need to enter these numbers manually. If you are depositing at a teller window, you may need to provide your account number, but the teller can look it up using your debit card or ID.