Your account number is the second set of digits on the bottom left of your check, after the routing number
When you look at the bottom of a check, you'll see three groups of numbers printed in a special magnetic ink. The first group is your bank's routing number. The second group — usually 10 to 12 digits long — is your account number. This number belongs only to you and identifies which specific account at your bank the check is drawn from.
The account number appears in the same place on every check from that account. If you have multiple checking accounts at the same bank, each one has its own account number, and each will print on its own checks.
The third group of numbers at the bottom is the check number itself — a smaller number that your bank assigns to track individual checks you write.
Key Takeaways
- Your account number is the middle set of digits printed at the bottom of your check, between the routing number and the check number.
- Account numbers are typically 10 to 12 digits long and are unique to your specific account.
- You can also find your account number on your bank statement, your debit card, or by logging into your online banking.
- Never share your account number with someone you don't trust, as it can be used to set up unauthorized transfers or payments.
Why banks print the account number on checks
The account number on your check serves the same purpose as the routing number — it's machine-readable information that tells the banking system where to pull the money from. When someone deposits your check, a machine scans these numbers and routes the payment to your specific account, not to your bank in general.
This is why the numbers are printed in a special magnetic ink called MICR (Magnetic Ink Character Recognition). The ink allows high-speed machines to read and sort thousands of checks per hour without human intervention. If you write a check by hand but the printed numbers are damaged or unclear, the check may be rejected or delayed.
Where else to find your account number
You don't need a check to find your account number. Your bank statement — whether you receive it by mail or view it online — displays your account number at the top or in a summary section. Your debit card may also have your account number printed on it, though some banks omit it for security reasons.
The easiest method is usually to log into your online banking portal or mobile app. Your account number will appear in your account details or summary page, often right next to your routing number. If you can't locate it, you can call your bank's customer service line and they will provide it over the phone after verifying your identity.
Security: when to share your account number and when not to
Your account number is semi-public information — it appears on every check you write, and anyone who receives a check from you can see it. However, that doesn't mean you should share it freely. Your account number plus your routing number is enough information for someone to set up an unauthorized transfer or automatic payment from your account.
Share your account number only with people or organizations you trust completely: your employer (for direct deposit), your landlord (to pay rent), a utility company (to set up automatic bill pay), or your accountant. If a stranger or an unfamiliar business asks for your account number over the phone or email, ask why they need it and verify their identity first. Legitimate organizations will not pressure you to share it when ready.
If you're concerned that your account number has been compromised, contact your bank right away. They can monitor your account for suspicious activity and, if necessary, close the account and issue you new checks with a new account number.
The order of numbers at the bottom of a check
Understanding the order helps you find what you need quickly. Reading from left to right, you'll see:
- Routing number (9 digits) — identifies your bank
- Account number (10 to 12 digits) — identifies your account
- Check number (4 to 5 digits) — identifies this specific check
Some checks also print the account number in the upper right corner for straightforward reference, but the official version for processing is always the one at the bottom in magnetic ink.
What to do if your account number is wrong on a check
If you notice that the account number printed on your checks doesn't match the account number your bank gave you, contact your bank when ready. This is rare but can happen if there was an error when your checks were printed. A wrong account number means deposits intended for you could go to the wrong account, or payments you write could be drawn from the wrong place.
Your bank can reorder checks with the correct account number at no charge if the error was their mistake. If the error was made by the check printer, the printer may cover the cost of reprinting, depending on your agreement with them.
Frequently Asked Questions
Is my account number the same as my routing number?
No. Your routing number identifies your bank; your account number identifies your specific account at that bank. Both are printed at the bottom of your check, but they are different numbers. You need both to set up direct deposit or automatic payments.
Can someone steal money using just my account number?
They would need both your account number and your routing number to set up an unauthorized transfer. However, since both numbers appear on every check you write, it's possible for someone to see them if they have access to your checks. This is why you should store unused checks securely and never leave them lying around.
Do I need my account number to use my debit card?
No. Your debit card has its own number, separate from your account number. You use the card number for purchases and ATM withdrawals. Your account number is mainly used for checks, direct deposit, and automatic bill payments.
What if I lose a check with my account number on it?
One lost check is not an emergency, but monitor your account for unusual activity. If you're concerned, contact your bank and let them know. They can watch for any unauthorized transactions. If you lose multiple checks or a whole checkbook, call your bank right away so they can flag your account.
Will my account number change if I switch banks?
Yes. When you open a new account at a different bank, you'll receive a new account number. Your old account number becomes inactive once you close the old account. If you have automatic payments or direct deposit set up, you'll need to update them with your new account number and routing number.