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 groups of numbers in magnetic ink. Read them left to right: 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 (usually four digits). Your account number identifies which specific account at your bank the check draws from.
The account number is the one you need when you set up direct deposit, arrange automatic bill payments, or give banking details to an employer or service provider. It stays the same for the life of the account, even if you order new checks.
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, but the exact length depends on your bank.
- You can also find your account number on your bank statement, your debit card, or by logging into your online banking portal.
- The account number never changes unless you close the account and open a new one, so you can reference any old check if you need it later.
How to read the numbers on the bottom of a check
The magnetic ink line at the bottom of a check is called the MICR line (Magnetic Ink Character Recognition). It contains exactly three pieces of information, always in the same order from left to right.
The first nine digits are your bank's routing number. This tells the Federal Reserve and other banks where to send the money. The next set of digits—usually 10 to 12 of them—is your account number. The final digits on the right are the check number, which your bank assigns to each check in sequence so you can track which checks you have written.
Some checks print the account number and check number in regular ink above the MICR line as well, for readability. But the magnetic ink versions are what the banking system actually reads when the check is processed.
Where else to find your account number
You do not have to dig out a check if you need your account number. Your bank statement lists it at the top or in the account information section. Your debit card may also print it, though some banks omit it for security. The fastest route is usually your online banking portal—log in and look for "Account Details" or "Account Information," which displays your full account number immediately.
If you are on the phone with your bank, they can read it to you after they verify your identity. Keep in mind that some banks use different account numbers for different account types (checking, savings, money market), so make sure you have the right one for the account you are using.
Why the account number matters
Your account number is how your bank knows which account to pull money from when you write a check or set up a transfer. Without it, a payment instruction is incomplete. When you give your banking details to an employer for direct deposit, to a utility company for automatic bill pay, or to anyone else who needs to send or receive money from your account, they need both the routing number and the account number.
The account number is also what appears on your monthly statement and what you reference if you need to dispute a transaction or track a payment. It is specific to you and your account—no two accounts at the same bank share the same account number.
What to do if you cannot read the numbers clearly
If the magnetic ink on your check is faded, smudged, or hard to read, do not guess. Contact your bank directly and ask them to confirm your account number. They can pull it up in seconds using your name and account type. This is especially important if you are about to use the number for direct deposit or automatic payments, because entering the wrong digits can send money to the wrong account.
If you have lost all your checks and cannot access your account online, call your bank's customer service line. You will need to verify your identity with your Social Security number, date of birth, or other information they have on file. They will then provide your routing number and account number verbally or by mail.
Common mistakes when copying your account number
The most frequent error is confusing the account number with the check number. Remember: the check number is short (usually four digits) and appears on the far right. The account number is longer (10 to 12 digits) and sits in the middle. Writing down the check number instead of the account number will cause a payment to fail or go to the wrong place.
Another common slip is misreading similar-looking digits—especially the numbers 0, 1, 5, and 8, which can blur together in magnetic ink. If you are writing down your account number by hand, double-check each digit against the check. If you are typing it, compare what you typed to the original before you submit it.
Keeping your account number secure
Your account number is not as sensitive as your PIN or password, but it is still part of your banking identity. Do not post it on social media or share it in an email unless you initiated the contact and you are certain the recipient is legitimate. Scammers sometimes call claiming to be from your bank and ask for your account number to "verify" your account—legitimate banks already have this information and will not ask for it over the phone.
When you write checks, your account number is visible to anyone who handles the check, including the recipient and bank employees. This is why checks are considered less secure than other payment methods for large amounts. If you are concerned about privacy, use online bill pay or a debit card instead.
Frequently Asked Questions
Is the account number the same as the check number?
No. The check number is the short sequence on the far right of the MICR line (usually four digits). The account number is the longer sequence in the middle (typically 10 to 12 digits). Each check has a different check number, but your account number stays the same across all your checks.
Can I use any old check to find my account number?
Yes. Your account number does not change unless you close the account, so a check from years ago will have the same account number as a new one. If you have an old check in a file or drawer, you can read the account number from it.
What if my bank uses a different account number format?
Most banks follow the standard MICR format, but some credit unions or smaller institutions may format their checks slightly differently. If you cannot locate three distinct number groups on the bottom of your check, contact your bank directly and ask them to point out which digits are your account number.
Do I need both the routing number and account number for direct deposit?
Yes. Direct deposit requires both pieces of information. The routing number tells the employer's bank where to send the money, and the account number tells your bank which account to deposit it into. If you provide only one, the deposit will fail.
Can someone steal money using just my account number?
It is difficult but not impossible. Someone with your account number and routing number could theoretically set up an unauthorized automatic payment or ACH transfer, which is why you should monitor your account regularly. However, they cannot access your account without additional information like your PIN or password. Report any suspicious activity to your bank immediately.