Your account number is printed on the bottom left of your checks, right after the routing number
When you look at the bottom of a check, you'll see a series of numbers printed in magnetic ink. Reading from left to right, the first set of numbers is your bank's routing number. when ready after that comes your account number. On most checks, your account number is 10 to 12 digits long, though this varies by bank.
The account number identifies your specific checking account at your bank. It's different from your routing number, which identifies the bank itself. Together, these two numbers tell any payment system exactly where to send or pull money.
You'll also see a fourth set of numbers on the right side of the check — that's the check number, which is just for your records and doesn't affect where the money goes.
Key Takeaways
- Your account number appears on the bottom of your checks, printed in the second position after the routing number.
- The account number is typically 10 to 12 digits and is unique to your individual checking account.
- You can find your account number on your bank statement, in your online banking portal, or by calling your bank if you don't have a check handy.
- Never share your account number with someone unless you're setting up a direct deposit, automatic payment, or wire transfer with them.
How to read the numbers on the bottom of a check
The bottom of a check contains four distinct groups of numbers, each with a different purpose. From left to right: the routing number (9 digits), your account number (usually 10 to 12 digits), the check number (4 to 5 digits), and sometimes a fifth group depending on your bank's system.
The routing number and account number are printed in a special magnetic ink that machines can read automatically. This is why the numbers look slightly different from the printed text elsewhere on the check — they're designed to be scanned by check-processing equipment at banks and payment centers.
If the numbers are hard to read on your check, you can always look them up another way. Your bank statement lists both numbers, and your online banking account will show your account number in the account details section.
Why your account number matters for payments
Your account number is essential whenever money needs to move in or out of your checking account. When you set up direct deposit from an employer or government program, you'll provide your routing number and account number so the money goes to the right place. The same applies when you authorize automatic bill payments or arrange a wire transfer.
Because your account number is tied directly to your money, it's important to keep it reasonably private. You should share it with employers, government agencies, and companies you're paying bills to — they need it to complete the transaction. But you shouldn't write it down and leave it lying around, and you shouldn't give it to someone just because they ask.
If you're worried your account number has been compromised, contact your bank when ready. They can monitor your account for unauthorized activity and, if needed, close the account and issue you a new one with a different number.
Finding your account number without a check
If you don't have a check in front of you, there are several other places to find your account number. Your monthly bank statement — whether you receive it by mail or view it online — displays your account number clearly, usually near the top or in the account summary section.
If you use online banking, log into your account and look for a section labeled "Account Details," "Account Information," or "My Accounts." Your account number will be listed there. You can also call your bank's customer service line and provide your identification; they'll read your account number to you over the phone.
Some banks also print your account number on your debit card, though not all do. Check the back or front of your card — if it's there, it will be a separate number from the card number itself.
The difference between your account number and other numbers on your check
It's straightforward to confuse the different numbers on a check because they all look similar. Your routing number identifies your bank and the specific branch or processing center. Your account number identifies your individual account within that bank. Your check number is just a reference for you — it helps you track which check you wrote and when.
If you're setting up a payment and someone asks for your "account number," they mean the middle set of digits on the bottom of your check, not the check number. If someone asks for your "routing number," that's the first set. Getting these mixed up can delay a payment or send money to the wrong place, so it's worth double-checking before you provide the information.
What to do if your account number is visible to others
If you've written a check to someone and they now have your account number, that's generally not a serious security risk on its own. Your account number alone doesn't let someone withdraw money from your account — they would also need your routing number, and even then, most transactions require additional verification.
However, if you're concerned about a specific person or situation, you can ask your bank to issue you a new account number. This closes your current account and opens a new one, so you'll need to update any automatic payments or direct deposits you have set up. This step is usually free, though it's worth asking your bank first.
A more common concern is if your account number appears on a check that gets lost or stolen. If this happens, contact your bank as soon as you realize it. They can flag your account and watch for suspicious activity. In most cases, banks have fraud protection that covers unauthorized transactions, so you won't lose money even if someone tries to use your account number fraudulently.
Frequently Asked Questions
Is it safe to give my account number to my employer?
Yes. Employers need your routing number and account number to set up direct deposit. This is a standard, find process. Your employer's payroll department handles this information confidentially, and it's the safest way to receive your paycheck.
Can someone take money from my account if they only have my account number?
Not easily. While your account number is part of what's needed to move money, most banks require additional verification — like a signature, PIN, or online login credentials — before authorizing a transaction. If someone does attempt fraud, your bank's protection typically covers you.
What if I accidentally wrote my account number somewhere public?
Contact your bank and let them know. They can monitor your account for unusual activity. If you're very concerned, you can request a new account number, though this requires updating any automatic payments or direct deposits tied to your current account.
Do all checking accounts have the same account number format?
No. Account numbers vary in length by bank — some are 10 digits, others are 12 or more. The format and position on the check are standardized, but the specific length depends on your bank's system.
Where is the account number on a starter check?
Starter checks (temporary checks issued when you open an account) have the same layout as regular checks. Your account number appears on the bottom in the second position, after the routing number. If your starter checks don't have numbers printed on them, contact your bank for the correct numbers to use.