Your account number is the second set of digits on the bottom of a check, printed between two other numbers

When you look at the bottom left of a check, you will see three groups of numbers separated by vertical lines. The account number is always in the middle group. It typically runs between 10 and 12 digits long, though the exact length depends on your bank.

The first group (on the far left) is your bank's routing number — a nine-digit code that identifies which bank issued the check. The third group (on the far right) is the check number, which your bank assigns to track individual checks you write. Only the middle group is your account number.

You need to know which number is which because banks, employers, and other organisations ask for them in different situations. Giving the wrong number can delay a deposit, cause a payment to go to the wrong account, or create confusion that takes weeks to untangle.

Key Takeaways

  • The account number is the middle set of digits at the bottom of your check, between the routing number on the left and the check number on the right.
  • Account numbers are typically 10 to 12 digits long, but the exact length varies by bank.
  • The routing number (first group) identifies your bank; the account number (middle group) identifies your specific account; the check number (third group) tracks that individual check.
  • When setting up direct deposit or automatic payments, you will need both your routing number and account number, but they go in separate fields.

Why the order matters when you set up direct deposit

Direct deposit is one of the most common reasons you will need to separate these numbers. When your employer or a government agency asks you to set up direct deposit, they will have two separate fields: one for routing number and one for account number. Putting the routing number in the account field (or vice versa) will send your money to the wrong place.

The routing number tells the sending bank which bank to send the money to. The account number tells that bank which account within that bank should receive it. Without both numbers in the right places, the transfer cannot complete correctly. Some banks will reject the transaction and send it back; others may hold it while they try to figure out where it belongs.

How to read the numbers if they are hard to see

Check numbers are printed in a special magnetic ink that can fade or become hard to read, especially on older checks or checks that have been wet. If you cannot read the numbers clearly on the bottom of your check, you have other options.

Your bank statement will list your account number at the top. You can also log into your online banking account — your account number usually appears on the main dashboard or in your account settings. If you have a debit card issued by your bank, the account number may be printed on the card itself, though some banks leave it off for security reasons. You can also call your bank's customer service line and they will read it to you over the phone.

The difference between your account number and your card number

Your debit card has its own number, separate from your account number. The card number is the 16 digits printed on the front of the card. This is not the same as your account number, even though both are connected to the same account.

The card number is used for purchases and online transactions. Your account number is used for bank transfers, direct deposit, and wire transfers. If someone asks for your account number, they are asking for the number from your check or bank statement, not the number from your card. Never give out your card number when someone asks for your account number, and never give out your account number when someone asks for your card number.

What to do if you cannot find a check

If you do not have a check handy and need your account number right away, your bank statement is the fastest source. Log into your online banking account or look at a paper statement you received in the mail — your account number will be printed near the top.

If you do not have access to a statement, call your bank's customer service number (usually on the back of your debit card or on your bank's website). Have your ID ready. The bank will verify who you are and read your account number to you. This usually takes less than five minutes.

Why banks print numbers in magnetic ink

The numbers at the bottom of your check are printed in magnetic ink character recognition (MICR) format. This special ink allows machines to read the numbers automatically when checks are processed, which is why the numbers look slightly different from regular printed text.

The MICR line is read by sorting machines at your bank and at the bank that receives the check. This is how banks process thousands of checks per day without a person having to type in the numbers by hand. If you write on the MICR line or if the numbers become smudged, the machine may not be able to read it, and the check may have to be processed manually, which takes longer.

Frequently Asked Questions

Is my account number the same on every check I write?

Yes. Every check from the same account will have the same account number printed on it. The only number that changes is the check number in the far right group. Your routing number also stays the same for all your checks from that bank.

Can someone steal money from my account if they know my account number?

Your account number alone is not enough to transfer money out of your account. Someone would also need your routing number, and even then, most banks require additional verification before processing a transfer. However, you should still treat your account number as private information and only share it with people and organisations you trust.

What if I give my account number to the wrong person?

Contact your bank when ready and let them know. Your bank can monitor your account for suspicious activity and can cancel checks or stop transfers if needed. In most cases, your bank is responsible for fraudulent transfers, but the faster you report it, the easier it is to stop.

Do I need my check to set up direct deposit?

You do not need a physical check, but you do need to know your routing number and account number. You can find both on your bank statement, in your online banking account, or by calling your bank. Some employers and agencies will let you take a photo of a check instead of typing in the numbers.

Why do some checks not have numbers printed at the bottom?

Some specialty checks or starter checks may not have the MICR line printed yet. If your checks are missing the numbers, contact your bank and request a new set. You can still use the checks, but they will take longer to process because the bank will have to enter the numbers manually.