Your account number is the second set of digits at the bottom of the check
The checking account number appears in the lower left portion of your check, printed between two sets of numbers. The first set (on the far left) is your bank's routing number. The second set, which comes immediately after, is your account number. Both are printed in magnetic ink and read from left to right.
The account number is typically 10 to 12 digits long, though the exact length varies by bank. It identifies your specific account within your bank's system. You'll see it printed in the same magnetic ink as the routing number, making both easy to read and machine-scannable.
If you're looking at a check and see three separate groups of numbers at the bottom, the middle group is your account number. The format looks like this: [routing number] [account number] [check number]. The check number also appears in the upper right corner of the check in regular printed digits.
Key Takeaways
- Your account number is the second group of digits printed at the bottom left of your check, between the routing number and the check number.
- Account numbers are typically 10 to 12 digits long and printed in the same magnetic ink as the routing number.
- The order at the bottom of the check is always: routing number, then account number, then check number.
- You can also find your account number on your bank statement, in your online banking portal, or by calling your bank.
Why banks print the account number on checks
Banks print both the routing number and account number on every check so that the check can be processed automatically by sorting machines. When you write a check and send it to someone, that person deposits it at their bank. Their bank's machines read the magnetic ink at the bottom and extract both numbers to route the payment to your account and deduct the correct amount.
This system has been in place for decades and remains the standard even though digital payments are now common. The magnetic ink encoding is called MICR (Magnetic Ink Character Recognition), and it allows banks to process thousands of checks per hour without manual data entry.
What to do if you can't read the numbers on your check
If the magnetic ink on your check is faded, smudged, or damaged, you can still find your account number through other means. Log into your online banking portal—most banks display your account number prominently on the dashboard or in an account summary section. You can also find it on your monthly bank statement, usually printed near the top or in the account information section.
If you don't have access to online banking or a recent statement, call your bank's customer service line. Have your name, address, and a form of identification ready. The representative can confirm your account number over the phone in seconds. You do not need to visit a branch in person for this information.
Differences between account number and routing number
The routing number and account number serve different purposes. Your routing number identifies which bank you use—it's the same for all customers at that bank. Your account number identifies your specific account within that bank, and it's unique to you. Think of the routing number as the bank's address and the account number as your mailbox number at that address.
Both numbers are required when you set up direct deposit, arrange wire transfers, or provide banking information to a creditor or employer. If you give only one without the other, the transaction cannot be completed correctly. That's why both appear together on every check.
How to protect your account number
Your account number is printed on every check you write, which means anyone who receives a check from you will see it. This is normal and expected—the number is not secret in the way a password is. However, you should still treat checks with basic care: don't leave them lying around, and don't photograph or share images of checks unnecessarily.
If you're concerned about someone having access to your account number, monitor your bank statements regularly for unauthorized transactions. Your bank's fraud protection typically covers unauthorized transfers, so report any suspicious activity right away. You can also request that your bank issue you new checks with a different account number if you believe your current number has been compromised, though this is rarely necessary.
Finding your account number without a check
You don't need a physical check to find your account number. Your bank statement lists it in the account information section, usually near the top. If you receive statements by mail, look for a line that says "Account Number" or "Acct #" followed by the digits. Digital statements show the same information in the same location.
Your bank's mobile app or website also displays your account number. Log in and navigate to account settings or account details. Some banks show it on the main dashboard; others require you to click into a specific account to see it. If you're unsure where to look, the bank's help section or a quick call to customer service will point you to the right place.
Frequently Asked Questions
Is the account number the same as the check number?
No. The check number appears in the upper right corner and at the bottom right of the check. The account number is at the bottom left, between the routing number and the check number. Each check has a unique check number, but all your checks from the same account share the same account number.
Can someone use my account number to steal money from my account?
An account number alone is not enough to transfer money out of your account. A person would also need your routing number, and even with both, most banks require additional verification or authorization. Monitor your statements regularly and report any unauthorized activity to your bank immediately.
What if I'm writing a check and can't find my account number?
You don't need to write your account number on a check—it's already printed there by the bank. If the printed numbers are illegible, contact your bank for a replacement set of checks. Do not write the account number by hand, as this can cause processing errors.
Do I need my account number to set up direct deposit?
Yes. Direct deposit requires both your routing number and account number so the employer or payer knows which bank and which account to send the money to. You can find both numbers on a check or by logging into your online banking portal.
Why do some checks have more than three groups of numbers at the bottom?
Some checks include additional information printed in magnetic ink, such as a secondary account identifier or bank branch code. The standard format is routing number, account number, and check number, but the exact layout can vary slightly by bank. If you're unsure which number is which, call your bank or check your statement.