Your account number is the second set of digits printed on the bottom left of your check, usually between 9 and 12 digits long
The bottom of every check contains three separate numbers printed in magnetic ink. Reading left to right, you see the routing number first (nine digits), then your account number, then the check number. Your account number identifies which specific account at your bank the check is drawn from. It is not secret information — it appears on every check you write — but it is essential for the bank to process the check correctly.
The account number tells the bank's processing system which of your accounts to pull money from. If you have a checking account and a savings account at the same bank, each has its own account number. When someone deposits a check you wrote, the routing number directs it to your bank, and the account number directs it to your account within that bank.
Key Takeaways
- Your account number appears on every check you write, printed in the second position on the bottom line after the routing number.
- The account number is typically 9 to 12 digits and identifies which specific account at your bank the check draws from.
- You can also find your account number on your bank statement, your debit card, or by logging into your online banking.
- The account number is not confidential — it is printed on every check — but you should still avoid sharing it unnecessarily with people you do not trust.
How to locate your account number on a physical check
Hold the check so you are looking at it from the front. At the very bottom of the check, you will see a line of numbers printed in a special magnetic ink that looks slightly raised or darker than regular printing. This is the MICR line (Magnetic Ink Character Recognition).
Starting from the left side of this line, the first nine digits are your routing number. Immediately after those nine digits, the next set of numbers — usually 9 to 12 digits — is your account number. After your account number comes your check number, which is also printed in larger type in the top right corner of the check.
If the numbers are hard to read, you can also find your account number on your bank statement (usually listed at the top), on the back of your debit card, or by logging into your online banking portal. Your bank's customer service line can also read it to you over the phone if you provide your name and other identifying information.
Why the account number matters for check processing
When you write a check, the person who receives it deposits it at their bank. That bank scans the MICR line at the bottom to read the routing number and account number. The routing number tells their bank which bank to send the check to; the account number tells your bank which account to deduct the funds from.
Without the correct account number, the check cannot be processed. If the account number is missing, illegible, or wrong, the check will be rejected or sent back to the depositor. This is why banks print the account number in magnetic ink — it is machine-readable and more reliable than handwriting.
Account number versus check number
Many people confuse the account number with the check number, but they serve different purposes. Your check number is a sequential identifier for that specific check — it appears in the top right corner in large print and also at the bottom in the MICR line. The check number helps you track which checks you have written and is useful for reconciling your bank statement.
Your account number identifies your account itself, not the individual check. The same account number appears on every check from that account. If you order new checks from your bank, they will have new check numbers but the same account number.
What information is safe to share
Your account number is printed on every check you write, so it is not a secret. Anyone who receives a check from you will see your account number. However, that does not mean you should volunteer it to strangers or post it online.
If someone asks for your account number to set up a direct deposit or automatic payment, make sure you trust them and that the request comes through an official channel. Legitimate businesses — your employer, your utility company, your insurance provider — will ask for your account number and routing number to set up recurring payments. Scammers may also ask for this information, so verify you are dealing with the real organization before you provide it.
The safest practice is to treat your account number the same way you treat your routing number: it is not secret, but you do not volunteer it to people you do not know or trust.
Finding your account number if you do not have a check
If you do not have a physical check in front of you, you can find your account number in several other places. Log into your online banking and look for your account details — the account number is usually displayed prominently. You can also call your bank's customer service line and provide your name and other identifying information; they will read your account number to you.
Your bank statement (whether paper or electronic) also lists your account number, usually near the top. If you have a debit card from the account, the account number may be printed on the back or on the statement that came with the card. Some banks print it on the front of the debit card as well, though this is less common for security reasons.
Frequently Asked Questions
Is my account number the same as my routing number?
No. Your routing number identifies your bank (nine digits), and your account number identifies your specific account at that bank (usually 9 to 12 digits). Both appear on the bottom of your check, with the routing number first.
Can someone steal money from my account if they have my account number?
Having only your account number is not enough to steal money. A thief would also need your routing number and would typically need additional verification. However, with both your account and routing number, someone could potentially set up unauthorized automatic payments or direct debits, so avoid sharing both together with people you do not trust.
Why is my account number different lengths on different checks?
Account numbers are typically 9 to 12 digits, and the length varies by bank and account type. Your account number should be the same length on every check from the same account. If it looks different, you may be misreading the MICR line or looking at a different account.
Do I need my account number to deposit a check?
No. When you deposit a check at your bank, you only need to provide the check itself. The bank's machines read the account number from the MICR line. You may need to write your account number on a deposit slip if you are using an older deposit method, but most modern deposits are processed by machine.
What if my account number is printed wrong on my checks?
Contact your bank immediately. Checks with an incorrect account number will not process correctly. Your bank can issue replacement checks with the correct account number at no charge, or you may be able to order them through an online check printing service if your bank approves it.