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 separated by vertical lines. The first group is your routing number (nine digits). The second group is your account number (typically 10 to 12 digits, though this varies by bank). The third group, on the far right, is the check number.
The account number identifies your specific checking account at your bank. It is unique to you and stays the same for the life of that account. You will need it to set up direct deposit, arrange automatic bill payments, or receive wire transfers. Banks print it on every check you order so you always have it available.
The order matters because financial systems read these numbers in a specific sequence. If you give someone the wrong number or the numbers in the wrong order, the transaction will fail or go to the wrong account.
Key Takeaways
- Your account number is the middle set of digits on the bottom of your check, between the routing number and the check number.
- Account numbers are typically 10 to 12 digits long, though the exact length depends on your bank.
- The account number is unique to your checking account and does not change unless you close the account and open a new one.
- You need both your routing number and account number together to complete direct deposits, wire transfers, and automatic payments.
How the three numbers are arranged on a check
The bottom of a check contains what banks call the MICR line (Magnetic Ink Character Recognition). This is the line that sorting machines and bank computers read. The numbers appear in this order from left to right: routing number, account number, check number.
Each group is separated by a vertical line or symbol. The routing number always comes first and is always nine digits. Your account number follows and is usually longer. The check number on the far right is typically four to five digits and increments by one with each check you write.
Some checks also print the account number and routing number in the top right corner in regular digits for easy reference. If you cannot read the MICR line clearly, you can use these printed numbers instead. However, the MICR line is the official version that the banking system reads.
Why you need both the routing number and account number
The routing number tells the banking system which bank holds your account. The account number tells that bank which account within their system is yours. Together, they form a complete address for your money.
If you provide only the account number without the routing number, the receiving bank will not know which bank to contact. If you provide only the routing number, the bank will not know which account to deposit into. Both numbers are required for any electronic transfer of funds.
This is why direct deposit forms, wire transfer requests, and bill payment setups all ask for both numbers. A single missing digit in either number will cause the transaction to fail or be rejected.
What to do if your check does not show the account number clearly
Older checks or checks that have been folded, wet, or handled roughly may have faded or smudged MICR numbers. If you cannot read the account number on your check, contact your bank directly. They can tell you your account number over the phone or through your online banking portal.
Most banks display your account number in your online account dashboard. Log in, go to your checking account details, and the full account number will be listed there. You can also call the customer service number on the back of your debit card or on your bank's website.
Never guess at a digit or try to reconstruct the number. A single wrong digit will cause problems. It is faster and safer to ask your bank directly.
Account numbers and security
Your account number is not secret in the same way your PIN or online password is secret. It is printed on every check you write and is visible to anyone who receives a check from you. However, the account number alone cannot be used to withdraw money from your account.
To actually move money, someone would need your account number, your routing number, and authorization from you or your bank. Simply having the account number does not give someone access to your funds. That said, you should not share your account number with anyone you do not trust, and you should be cautious about giving it to unfamiliar businesses or websites.
If you suspect fraud or unauthorized activity on your account, contact your bank immediately. Banks have fraud protection procedures and can investigate suspicious transactions.
Finding your account number without a check
If you do not have a check in front of you, there are several other ways to find your account number. Your bank statement lists it at the top or in the account summary section. Your debit card may have the last four digits printed on it, though this is not the full account number.
The fastest method is to log into your online banking account. Your full account number appears in the account details or account settings page. You can also call your bank's customer service line and provide your name and identifying information, and they will give you the number.
Frequently Asked Questions
Is the account number the same as the check number?
No. The check number is the third set of digits on the right side of the MICR line and identifies that specific check. The account number is the middle set of digits and identifies your entire checking account. Each check has a different check number, but your account number stays the same across all your checks.
Can someone take money from my account if they have my account number?
Not without additional information and authorization. Your account number alone is not enough to withdraw funds. A person would also need your routing number, and most transactions require a signature, PIN, or online authorization from you or your bank. If you are concerned about unauthorized access, contact your bank immediately.
Do all banks use the same account number format?
No. Account numbers vary in length by bank. Some banks use 10 digits, others use 12 or more. The format is consistent within each bank, but there is no single standard across all financial institutions. Your bank's account numbers will always be the same length for all their customers.
What if I write down my account number wrong?
A single wrong digit will cause the transaction to fail or be rejected. The receiving bank or financial institution will not process a transfer with an incorrect account number. If this happens, contact the organization you were sending money to and provide the correct number, then resubmit the request.