Your account number is printed at the bottom of the check, after the routing number
The bottom of a check contains three sets of numbers printed in a special magnetic ink. Reading left to right, you see the routing number first (nine digits), then your account number (typically 10 to 12 digits), then the check number (three to four digits on the right). Your account number is the middle set.
The account number identifies your specific checking account at your bank. It stays the same for every check you write from that account. If you have multiple accounts at the same bank, each one has its own account number, but they all share the same routing number.
You do not need to memorize it. Write it down or take a photo of a check the first time you need it — for setting up direct deposit, arranging a wire transfer, or giving payment instructions to a business. Keep that information in a safe place, separate from the check itself.
Key Takeaways
- Your account number appears in the middle of the three number sets at the bottom of a check, between the routing number and the check number.
- Account numbers are typically 10 to 12 digits long and identify only your individual account, not your bank.
- The account number is the same on every check from that account and does not change unless you close and reopen the account.
- You can photograph a check or write down the account number once and reuse it for direct deposit, bill pay, and wire transfer requests.
The layout of numbers at the bottom of a check
The magnetic ink numbers at the bottom left of a check follow a strict order. The first nine digits are always the routing number. Immediately after those nine digits, your account number begins. Count the digits: if you see nine, then stop and start counting the next set — that is where your account number starts.
On most checks, the account number runs for 10 to 12 digits, though some banks use slightly different lengths. After your account number ends, the check number appears on the far right. The check number is usually shorter — three or four digits — and matches the number printed in the upper right corner of the check.
If you are unsure which set is which, look at the check number first. You already know what that is — it is printed in large type in the top right corner. Find that same number in the magnetic ink line on the bottom right. Everything between the nine-digit routing number and the check number is your account number.
Why banks print the account number on every check
The magnetic ink encoding at the bottom of a check is machine-readable. When you deposit a check or your bank processes it, a scanner reads those numbers automatically. The account number tells the bank which account to pull the money from. Without it printed on every check, the bank would have to read the account number from somewhere else — usually from the top of the check, which is slower and more error-prone.
This system has been in place for decades and is standardized across all U.S. banks. The routing number directs the check to the correct bank; the account number directs it to the correct account within that bank. Together, they are the address of your money.
Finding your account number if you do not have a check
If you do not have a check in front of you, your bank statement shows your account number. Log into your online banking portal and look for your account details or account summary page — the account number is usually displayed prominently near the top. You can also call your bank's customer service line and ask them to read it to you over the phone.
Your debit card does not print your account number, and your bank routing number alone is not enough to identify your account. You need both the routing number and the account number together. If you are setting up direct deposit or a wire transfer and only have your debit card, call your bank or check your online account to find the account number.
Keeping your account number safe
Your account number is not as sensitive as your PIN or password, but it should still be treated with care. Anyone with your account number and routing number can set up a transfer out of your account or attempt to withdraw money, though most banks require additional verification before processing large transfers.
Do not post photos of checks on social media or email them to people you do not trust. If you need to share your account number with a business — to set up payroll direct deposit, for example — use a phone call or a secure message rather than email when possible. Keep written copies of your account number in a safe place at home, separate from your checkbook.
What to do if you cannot read the numbers clearly
If the magnetic ink at the bottom of a check is smudged, faded, or damaged, the numbers may be hard to read. Try tilting the check under a bright light or using a magnifying glass. If that does not work, call your bank and provide them with the check number (printed in the top right corner) and the date on the check. They can look up the account number from their records.
If you are trying to deposit a check with unreadable numbers, your bank may refuse it or ask you to contact the person who wrote it for confirmation. For your own checks, order a new box from your bank if the magnetic ink on your current checks is fading — banks can usually print new checks within a week or two.
Frequently Asked Questions
Is my account number the same as my routing number?
No. Your routing number identifies your bank and is the same for all customers at that bank. Your account number identifies your specific account and is unique to you. You need both numbers together for direct deposit or wire transfers.
Can someone withdraw money if they only have my account number?
They would need both your account number and routing number, and most banks require additional verification before processing a withdrawal or transfer. However, do not share your account number with people you do not trust. Treat it as you would any other financial information.
What if the numbers at the bottom of my check do not match what my bank told me?
Call your bank immediately. A mismatch could mean the check was printed incorrectly, or there is an error in your account setup. Your bank can verify the correct account number and issue corrected checks if needed.
Do I need to use a check to find my account number, or can I use my debit card?
Your debit card does not display your account number. Use a check, your bank statement, your online banking portal, or call your bank directly. The account number is separate from your card number.
Will my account number change if I close and reopen my account?
Yes. If you close your account and open a new one, you receive a new account number. Old checks from the closed account will not work. If you reopen an account at the same bank, it is treated as a new account with a new number.