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 a specific order. The routing number comes first (nine digits), your account number comes second (typically 10 to 12 digits, though this varies by bank), and the check number comes last on the right side. Your account number identifies which specific account at your bank the check is drawn from.
The account number is always printed in the same magnetic ink as the routing number, using a format called MICR (Magnetic Ink Character Recognition). This allows banks to process checks electronically. You'll see it clearly if you look at the bottom of any check you've written or received.
Key Takeaways
- The account number is the middle set of digits on the bottom of your check, positioned between the routing number on the left and the check number on the right.
- Account numbers are typically 10 to 12 digits long, though the exact length depends on your bank.
- The account number appears in the same magnetic ink as the routing number and is machine-readable.
- You need both your routing number and account number together to set up direct deposit, wire transfers, or automatic bill payments.
How to read the three numbers at the bottom of a check
Hold your check horizontally and look at the bottom edge. You'll see three distinct groups of numbers printed in dark ink. Reading from left to right: the first group is your routing number (always nine digits), the second group is your account number (length varies), and the third group on the far right is your check number (usually four digits).
Some checks also print your account number in the top right corner in regular font for easy reference, but the version at the bottom in magnetic ink is the official one used for processing. If you're setting up a payment or transfer and need to provide these numbers, use the ones from the bottom of the check.
Why banks print the account number on every check
Your account number appears on every check because it tells the receiving bank exactly which account to debit when the check clears. Without it, the bank would have no way to know which of potentially thousands of accounts at your bank should pay out the funds. The routing number identifies your bank; the account number identifies you within that bank.
The account number also stays the same for the life of your account, even if you order new checks. If you close an account and open a new one at the same bank, you'll get a new account number and new checks printed with that number.
What to do if you can't find your account number on a check
If your check doesn't show the account number clearly at the bottom, or if you're looking at an old check and the numbers have faded, contact your bank directly. You can call the number on the back of your debit card, log into your online banking portal, or visit a branch in person. Your bank can tell you your account number in seconds.
You can also find your account number on your monthly bank statement, usually printed at the top of the first page. If you have online banking set up, your account number is typically visible in your account settings or dashboard.
Using your account number for direct deposit and transfers
When you need to provide banking information for direct deposit (like for payroll or tax refunds), you'll need to give both your routing number and your account number. Some forms ask for these separately; others ask you to write them together. Always double-check that you've copied the numbers correctly, because a single digit wrong will send money to the wrong account.
The same applies for setting up automatic bill payments, wire transfers, or receiving payments from other people. Your account number is what ensures the money lands in your account, not someone else's at the same bank.
Account numbers and check security
Your account number is not secret in the same way your PIN or password is. It's printed on every check you write and is visible to anyone who receives a check from you. However, someone with only your account number cannot access your account without also having your routing number and other identifying information.
If you're concerned about sharing your account number, remember that it's already shared with every person or business you've ever written a check to. The real protection comes from monitoring your account regularly for unauthorized transactions and reporting anything suspicious to your bank immediately.
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 bottom line and identifies that specific check. The account number is the middle set of digits and identifies your account. A single account can have hundreds of checks, each with its own check number, but they all share the same account number.
Can I use just the account number without the routing number?
No. You need both numbers together. The routing number tells the receiving bank which bank to contact, and the account number tells that bank which account to use. Providing only one without the other will not work for direct deposit, transfers, or payments.
What if my account number has fewer than 10 digits?
Some banks use shorter account numbers, typically 8 or 9 digits. The length varies by bank and account type. As long as the number is printed on your check between the routing number and check number, it's correct for your account.
Do I need to memorize my account number?
You don't need to memorize it, but it's helpful to know where to find it quickly. Write it down in a safe place, take a photo of a check, or note it in your online banking settings. You'll need it whenever you set up direct deposit, automatic payments, or receive money from someone else.