Your account number is the second set of digits printed on the bottom left of your check, after the routing number
The bottom of a check contains three separate numbers, printed in magnetic ink. From left to right, they are: the routing number (nine digits), your account number (typically 10 to 12 digits), and the check number (usually four to six digits). Your account number identifies which specific account at your bank the check is drawn from. It is not the same as your routing number, which identifies the bank itself.
The account number appears in two places on a check: once in the magnetic line at the bottom, and again printed in regular text in the upper right corner. Both refer to the same account. The magnetic line version is what bank machines read when processing the check; the printed version is there for human reference.
Key Takeaways
- Your account number is the middle set of digits on the magnetic line at the bottom of the check, between the routing number and the check number.
- Account numbers are typically 10 to 12 digits long, though the exact length varies by bank.
- The same account number also appears printed in regular text in the upper right corner of the check for easy reference.
- You need your account number when setting up direct deposit, arranging wire transfers, or providing banking details to employers or creditors.
How to read the magnetic line at the bottom of your check
The magnetic line at the bottom of a check always follows the same order. The first nine digits are your bank's routing number. Immediately after those nine digits, your account number begins. Count the digits carefully: after you pass the ninth digit, the next digits belong to your account.
Account numbers vary in length depending on your bank. Most are 10 to 12 digits, but some banks use shorter or longer numbers. Do not assume the length; count the digits in your own checks. The account number ends when the check number begins, which is usually a much shorter sequence (often just four digits).
If you have multiple checks from the same account, the account number will be identical on all of them. The only number that changes from check to check is the check number itself, which appears at the end of the magnetic line and also in the upper right corner.
Where else your account number appears on the check
In addition to the magnetic line, your account number is printed in regular text in the upper right corner of the check, below or next to the check number. This printed version is identical to the one in the magnetic line and serves as a backup reference. You can read this version without needing to decode the magnetic ink.
Some banks also print your account number on the check stub (the left side of the check that you tear off and keep). The stub typically shows your account number, the check number, the date, and the amount, making it easy to record the transaction in your own records.
What your account number is used for
Your account number is required whenever you need to identify your specific account to another party. Common situations include setting up direct deposit for your paycheck, arranging automatic bill payments, receiving wire transfers, or providing banking details to an employer, creditor, or government agency.
You may also need your account number when calling your bank's customer service line to discuss your account, though the bank can usually look you up by your Social Security number or other identifying information. Having your account number handy speeds up the process.
Distinguishing your account number from your routing number
The routing number and account number serve different purposes and should never be confused. Your routing number identifies your bank and is the same for all customers at that bank. Your account number identifies your specific account within that bank and is unique to you.
When you need to provide banking information, you will usually need both numbers. For example, setting up direct deposit requires both your routing number (so the employer knows which bank to send money to) and your account number (so the bank knows which account to deposit it into). Providing only one without the other will cause the transaction to fail.
If you cannot find your account number on a check
If your checks are very old or damaged, the magnetic line may be difficult to read. In that case, call your bank's customer service number (usually on the back of your debit card or on your bank statement) and provide your name and Social Security number. The bank can tell you your account number over the phone.
You can also find your account number on your bank statement, which lists it at the top or in a summary section. Online banking platforms typically display your account number in the account details or settings area. If you have a debit card, the account number may also appear on your card itself, though not all banks print it there.
Frequently Asked Questions
Is my account number the same as my debit card number?
No. Your debit card number and your account number are different. Your account number identifies your bank account; your debit card number is a separate number assigned to the card itself. You can have multiple debit cards linked to the same account, each with a different card number but the same account number.
Can someone access my account if they know my account number and routing number?
Knowing both numbers alone is not enough to withdraw money or make unauthorized transfers. However, these two numbers are the standard information needed to set up ACH transfers or automatic payments. Treat them as you would any banking information—share them only with trusted parties like your employer or established billers.
What if the magnetic line on my check is smudged or illegible?
You can still use the check. The printed account number in the upper right corner is readable and valid. If you need to provide your account number to someone else, use the printed version or call your bank to confirm the number. Smudging does not change your account number itself.
Do all banks print account numbers the same way on checks?
The order is always the same—routing number, then account number, then check number—but the exact position and formatting vary slightly by bank. Some banks print the account number larger or in a different location on the check. The magnetic line format is standardized, so the order is always consistent.
How many digits should my account number have?
Most account numbers are 10 to 12 digits, but this varies by bank. Count the digits on your own check to determine your bank's standard. If you are unsure whether you have copied the number correctly, call your bank to verify.