Your account number is the second set of digits at the bottom of the check
The bottom of a check contains three groups of numbers separated by vertical lines. Reading left to right, you see the routing number (nine digits), then your account number (usually 10 to 12 digits), then the check number. Your account number is always in the middle position. It identifies your specific account at your bank, separate from every other account at that same bank.
The account number appears in the same spot on every check you have from that account. If you have multiple checking accounts at the same bank, each one has its own account number, and each check will show the correct one for that account.
You can also find your account number on your bank statement, in your online banking portal, or by calling your bank's customer service line. But a check is the fastest way if you have one in front of you right now.
Key Takeaways
- Your account number is the middle set of digits at the bottom of a check, between the routing number and the check number.
- Account numbers are typically 10 to 12 digits long and are unique to your specific account.
- The account number stays the same on every check from that account.
- If you cannot locate a check, your bank statement or online banking portal will show your account number.
- Never share your account number with anyone you do not trust, as it can be used to set up unauthorized transfers.
How to read the numbers at the bottom of a check
The bottom left corner of a check shows three distinct groups of numbers in a special magnetic ink format. The first group is always nine digits — that is your routing number. After a vertical line, the second group is your account number. After another vertical line, the third group is the check number (which also appears in the top right corner of the check).
The spacing and format are standardized so banks can process checks automatically. The magnetic ink allows machines to read the numbers even if the check is worn, folded, or partially illegible. If you are reading a check by hand, the account number is simply the middle set of digits.
Why you need your account number and where banks ask for it
Your account number is required for direct deposit, wire transfers, automatic bill payments, and setting up transfers between your accounts. Employers need it to deposit your paycheck. Utilities and subscription services need it to withdraw payments automatically. If you are receiving a refund from a government agency or business, they will ask for your account number to deposit the money directly.
Banks also ask for your account number when you call customer service, log into your account online, or visit a branch in person. It is how they know which account to pull up and which transactions to show you. You will also need it if you are setting up a new bank account or transferring money between banks.
Other places to find your account number if you do not have a check
Your bank statement — whether printed or digital — displays your account number at the top or in a summary section. Log into your online banking portal and look for account details or account information; your account number will be listed there. You can also call your bank's customer service number (usually on the back of your debit card) and provide your name and Social Security number to confirm your account number over the phone.
If you have a debit card from the account, the account number does not appear on the card itself, but your bank can tell you the number when you call. Mobile banking apps also show your account number in the account settings or details section.
What to do if the numbers at the bottom of your check are smudged or unclear
If the magnetic ink numbers are faded, smudged, or hard to read, do not guess. Contact your bank directly and provide your name, address, and the last four digits of your Social Security number. They will confirm your account number for you. This takes a few minutes on the phone or through your online banking portal.
If you are trying to use the check number for a transaction and cannot read it clearly, that is also something your bank can help with. They can look up the check in your account history and confirm the number. Do not attempt to write in numbers you are unsure about, as this can cause the check to be rejected or processed incorrectly.
Keeping your account number safe
Your account number is sensitive information. Do not share it with anyone unless you initiated the contact or you are certain of who you are dealing with. Scammers can use your account number to set up unauthorized transfers or automatic payments. If someone calls or emails asking for your account number and you did not contact them first, hang up or delete the message and call your bank directly using the number on your card or statement.
When you provide your account number for legitimate purposes — direct deposit, bill payments, refunds — make sure you are dealing with an official channel. Verify phone numbers and websites independently rather than using contact information from an email or text message.
Frequently Asked Questions
Is my account number the same as my routing number?
No. Your routing number identifies your bank or credit union (nine digits, always the same for all customers at that institution). Your account number identifies your specific account at that bank (10 to 12 digits, unique to you). Both appear at the bottom of your check, with the routing number first and the account number second.
Can someone use just my account number to take money from my account?
Your account number alone is not enough to drain your account, but it is enough to set up unauthorized transfers or automatic payments. Combined with your routing number (both visible on a check), someone could attempt ACH transfers. This is why you should not share your account number with people you do not trust and why you should monitor your account regularly for unauthorized activity.
Do I need my account number to deposit a check into my account?
No. When you deposit a check at an ATM or through mobile deposit, you do not need to enter your account number — the bank already knows which account you are depositing into. You only need your account number when someone else is depositing money into your account or setting up a transfer to you.
What if I have multiple checking accounts at the same bank?
Each account has its own unique account number. Your checks for each account will show the correct account number for that specific account. If you need to know which account number belongs to which account, your bank statement or online banking portal will show the account number next to the account name.