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 printed in magnetic ink. Reading left to right, you see the routing number first (nine digits), then your account number (usually 10 to 12 digits), then the check number (three to four digits on the right). Your account number sits in the middle and identifies which specific account at your bank the check draws from.
The account number is the same for every check you write from that account. If you order new checks from your bank or a third-party printer, the account number printed on them will match the one on your current checks. This number stays with the account even if you close it and reopen it later at the same bank — the bank may reassign it, but while the account is active, the printed number does not change.
The account number on your check is not secret in the way a password is. You write checks specifically so other people can see this number and deposit or cash them. However, you should not share your account number with anyone you do not trust to handle money from that account, since they could potentially set up automatic withdrawals or other transfers.
Key Takeaways
- Your account number is the middle set of digits at the bottom of the check, between the routing number on the left and the check number on the right.
- Account numbers are typically 10 to 12 digits long and are the same on every check from that account.
- The account number identifies your specific account and is visible to anyone who receives the check, so treat it as semi-public information.
- If you cannot read the printed numbers clearly, you can find your account number on your bank statement or by logging into your online banking portal.
How to read the numbers in order
Hold the check horizontally and look at the bottom edge. You will see a line of numbers printed in a special dark ink that looks slightly raised or embossed. The first nine digits are your bank's routing number. After a small space, the next 10 to 12 digits are your account number. At the far right, separated by another space, is the check number — this is a shorter sequence, usually three or four digits.
Some checks print the check number twice: once in the magnetic ink line at the bottom and once in the upper right corner in regular ink. The number in the upper right is easier to read and is the same as the rightmost number in the magnetic line. Do not confuse this with your account number.
Finding your account number if the check is unclear
If the numbers at the bottom of your check are faded, smudged, or hard to read, you have two faster options than ordering new checks. Log into your bank's website or mobile app and look for your account details — most banks display the full account number in the account summary or settings section. You can also call your bank's customer service line, give them your name and some identifying information, and they will read your account number to you over the phone.
Your bank statement, whether printed or digital, also lists your account number at the top or in a header section. If you have recent statements saved, this is often the quickest place to find it without logging in or making a call.
Why banks print the account number on checks
The account number on your check serves two purposes. First, it tells the receiving bank which account to debit when the check clears. Second, it allows you to identify which account a particular check belongs to if you write from multiple accounts. The magnetic ink encoding at the bottom of the check is machine-readable, so banks can process checks quickly without manually typing in numbers.
When you deposit a check or send it by mail, the recipient's bank scans the bottom of the check and reads both the routing number and account number electronically. This is why the numbers must be printed clearly and in the correct format — if they are illegible, the check may be rejected or processed slowly.
Account numbers and check security
Your account number appears on every check you write, so anyone who receives a check from you will see it. This is by design — the recipient needs this information to deposit or cash the check. However, this also means you should not write checks to people or businesses you do not trust.
If someone has your account number and routing number but not your checks, they cannot easily withdraw money from your account. Banks require additional verification — usually a signature or PIN — before processing transfers or withdrawals. That said, if someone has both your account number and routing number, they could potentially set up unauthorized automatic payments or ACH transfers, so it is worth protecting this information from strangers.
If you suspect someone has misused your account number, contact your bank immediately. Most banks have fraud protection policies and can reverse unauthorized transactions within a certain window.
Frequently Asked Questions
Is my account number the same as my routing number?
No. Your routing number identifies your bank (nine digits, on the left). Your account number identifies your specific account at that bank (10 to 12 digits, in the middle). Together they tell the banking system exactly where to send or pull money.
Can someone withdraw money if they only have my account number?
Not easily. They would also need your routing number and would typically need additional verification like a signature or PIN. However, having both numbers does create some risk, so do not share them with people you do not trust.
What if my check number and account number look the same?
They are different. The check number is on the far right (usually three to four digits) and appears in the upper right corner too. Your account number is longer (10 to 12 digits) and sits in the middle of the magnetic line. The check number changes with each check; the account number stays the same.
Do I need to memorize my account number?
No. You can look it up on your statement, in your online banking portal, or by calling your bank whenever you need it. Most people do not memorize it and do not need to.