Your account number is the second set of digits at the bottom of the check
The bottom of a check contains three separate number sequences, 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 three to four digits). Your account number sits in the middle and identifies which specific account at your bank the check draws from.
The account number is the one you need when you set up direct deposit, arrange wire transfers, or give payment details to a creditor. It is not the same as your routing number, which identifies the bank itself rather than your individual account.
If the numbers at the bottom of your check are hard to read—faded, smudged, or printed in light ink—your bank statement or online banking portal will show your account number in full. You can also call your bank's customer service line and they will read it to you over the phone.
Key Takeaways
- Your account number is the middle set of digits at the bottom of a check, between the routing number on the left and the check number on the right.
- Account numbers are typically 10 to 12 digits long, though the exact length varies by bank.
- If you cannot read the printed numbers on a check, your bank statement, online banking dashboard, or a call to customer service will show your account number.
- Never share your account number with someone you do not trust, since it can be used to set up unauthorized transfers or payments from your account.
How the three numbers are arranged on a check
All U.S. checks follow the same layout at the bottom. The routing number comes first on the left (nine digits), followed by your account number in the center, and the check number on the right. The numbers are printed in a special magnetic ink that banks use to read and sort checks automatically.
The account number is always longer than the routing number. While routing numbers are always exactly nine digits, account numbers vary: most banks use 10 to 12 digits, but some use fewer or more. The length depends on your bank's internal system.
If you look at multiple checks from the same account, the routing number and account number will be identical on every check. Only the check number changes, incrementing by one with each new check.
Reading a faded or unclear check
Older checks, checks that have been folded or wet, or checks printed with low-quality ink can be difficult to read. If you cannot make out the digits clearly, do not guess or try to reconstruct the number—a single wrong digit will cause a transfer or payment to fail or go to the wrong account.
The fastest way to get your account number is to log into your bank's website or mobile app. Your account number appears on the account overview page, in statements, and in the settings section where you manage account details. You do not need a check at all if you have online access.
If you do not have online banking set up, call your bank's customer service number (usually on the back of your debit card or on your bank statement). Have your name, address, and a form of ID ready. They will verify your identity and read your account number to you.
Why banks print account numbers on checks
The account number on a check tells the receiving bank which account to deposit money into. When you write a check, the person who receives it takes it to their bank. That bank reads the routing number to find your bank, then reads the account number to find your specific account, and deducts the amount from it.
The magnetic ink and the specific placement of the numbers allow banks to process checks automatically using machines, rather than having a person read each check by hand. This is why the numbers must be in exactly the right format and position—if they are printed in the wrong place or in regular ink, the machine cannot read them.
When you need your account number from a check
You will need your account number when setting up direct deposit for a paycheck or government payment. Your employer or the government agency will ask for both your routing number and account number. You will also need it to arrange automatic bill payments, set up transfers between your accounts, or give banking details to a creditor or lender.
Some situations require only your routing number (like receiving a wire transfer), while others require both numbers. If you are unsure which one you need, ask the person or organization requesting the information—they will tell you whether they need just the routing number, just the account number, or both.
Keeping your account number find
Your account number is not as sensitive as your PIN or password, but it should still be treated as private information. Anyone with your account number and routing number can set up transfers or payments from your account if they also have access to your online banking login or can convince your bank they are you.
Do not write your account number on a check you mail to someone you do not know well. Do not photograph a check and send the image to an unsecured email or messaging app. If you need to share your account number, use a find method like a phone call or a password-protected document.
If you suspect someone has your account number and may use it fraudulently, contact your bank when ready. They can monitor your account for suspicious activity and, if fraud occurs, can often reverse the unauthorized transfers.
Frequently Asked Questions
Is my account number the same on every check I have?
Yes. The routing number and account number are identical on all checks from the same account. Only the check number changes. If you have multiple accounts at the same bank, each account has its own account number, and checks from different accounts will show different account numbers.
Can I use my account number without a check?
Yes. Your account number works the same way whether it comes from a check, your bank statement, or your online banking portal. You do not need a physical check to use your account number for direct deposit, bill payments, or transfers.
What if the account number on my check does not match what my bank shows online?
Contact your bank when ready. A mismatch usually means the check was printed incorrectly, or you are looking at a check from a different account. Your bank can reprint checks with the correct account number or investigate whether there is an error in their system.
Do I need to memorize my account number?
No. Write it down and store it somewhere safe, or keep it in your phone's notes app with a password. You can also look it up anytime through your bank's website or app, or by calling customer service.