Your account number is the second set of digits on the bottom of your check, printed between the routing number and the check number
The bottom left of any check shows three separate numbers in magnetic ink. Reading left to right, you see the routing number first (nine digits), then your account number (typically eight to twelve digits), and finally the check number on the far right (usually four digits). Your account number identifies which specific account at your bank the check is drawn from.
The account number stays the same across all checks from that account. If you order new checks from your bank or a check printer, the account number printed on them will match the one on your existing checks. This number is what your bank uses to pull money from the correct account when a check is deposited.
You may also see your account number printed in the top right corner of the check, but the version at the bottom in magnetic ink is the one used for processing. Banks and payment processors read the magnetic ink line automatically, so that bottom version is what matters for actual transactions.
Key Takeaways
- Your account number appears as the middle set of digits on the magnetic ink line at the bottom of your check, between the routing number and check number.
- Account numbers typically contain eight to twelve digits and remain the same on every check from that account.
- The account number at the bottom of the check in magnetic ink is what banks use to process the check, even if it also appears elsewhere on the check.
- You can find your account number on your bank statement, online banking portal, or by calling your bank if you cannot locate it on a check.
Why banks print the account number on checks
The account number on your check serves as the link between the physical check and your actual bank account. When someone deposits your check, the bank's sorting equipment reads the magnetic ink line and uses that account number to know which account to debit. Without it, the bank would have no way to connect the check to you.
The magnetic ink encoding also allows checks to be processed much faster than if banks had to read the numbers by hand. The routing number tells the processing center which bank to send the check to, and the account number tells that bank which customer account to pull the money from. The check number helps you and your bank track which specific check was used for which transaction.
How to read the check number line correctly
The magnetic ink line at the bottom of a check always follows the same order: routing number, account number, check number. The routing number is always nine digits. Your account number length varies by bank—some use eight digits, others use ten or twelve. The check number is typically four digits but can be shorter or longer depending on how many checks you order.
If you are unsure which number is which, start from the left. The first complete number is the routing number. Skip past it, and the next complete number is your account number. The smallest number on the right is the check number. If you still cannot tell them apart, your bank statement or online banking portal will show your account number clearly labeled, and you can compare it to what you see on the check.
Where else to find your account number
You do not need a check to find your account number. Your bank statement lists it clearly, usually near the top or in the account information section. If you use online banking, your account number appears in your account settings or dashboard. You can also call your bank's customer service line and provide your name and identifying information, and they will read your account number to you over the phone.
Debit cards sometimes print the last four digits of your account number on the card itself, though not always. Credit cards do not use account numbers in the same way—they have card numbers instead. If you need your full account number and cannot find it on a check or statement, the fastest route is usually your bank's website or a phone call to customer service.
What to do if you cannot find your account number on a check
If your check does not have a magnetic ink line at the bottom, or if the numbers are faded or unclear, do not try to guess. Contact your bank directly. Provide them with the check number (printed in the top right corner in regular ink), and they can look up the account number associated with that check.
Checks printed by third-party check printers should still have the correct account number in the magnetic ink line. If you ordered checks and the account number appears wrong, contact the printer immediately and also notify your bank. Using checks with an incorrect account number can cause deposits to go to the wrong account or checks to bounce.
Using your account number safely
Your account number is not secret in the same way a password is—it appears on every check you write and on statements you may share. However, you should not post it on social media or give it to someone you do not trust. Combined with your routing number, your account number allows someone to set up automatic withdrawals from your account or attempt fraudulent transfers.
If you suspect someone has your account number and may misuse it, contact your bank immediately. You can request a new account number, which means your bank will close the old account and open a new one. You will need to update any automatic payments or deposits that use the old account number. Your bank can walk you through this process and help you decide whether the risk warrants the change.
Frequently Asked Questions
Is my account number the same as my routing number?
No. Your routing number identifies your bank (the same for all customers at that bank), while your account number identifies your specific account within that bank. Both appear on your check, but they are separate numbers that serve different purposes in processing.
Can I use my account number to receive direct deposits?
Yes. To set up direct deposit for payroll or benefits, you typically provide your routing number and account number. These two numbers together tell the sending organization which bank and which account to deposit money into.
What if the account number on my check does not match my bank statement?
Contact your bank immediately. A mismatch usually means the check was printed incorrectly. Your bank can confirm which number is correct and may issue you new checks at no charge if there was an error on their end.
Do I need to memorize my account number?
No. You can look it up on your statement, online banking, or by calling your bank whenever you need it. Most people do not memorize it because they rarely need to provide it by hand.