Your account number is the second set of digits on the bottom of a check, printed between the routing number and the check number

When you look at the bottom left of a check, you'll see three groups of numbers separated by vertical lines. The first group is your routing number (nine digits). The second group is your account number (typically 10 to 12 digits, though this varies by bank). The third group, on the far right, is the check number (usually four digits).

The account number identifies your specific checking account at your bank. It's the number you need when you're setting up direct deposit, arranging automatic bill payments, or receiving a wire transfer. Unlike your routing number, which is the same for every customer at your bank, your account number is unique to you.

The order matters because banks read checks from right to left when they process them. The check number comes first in the reading sequence, then the account number, then the routing number. This is why the numbers appear in that order on the check itself.

Key Takeaways

  • Your account number is the middle set of digits on the bottom of your check, between the routing number and check number.
  • Account numbers are typically 10 to 12 digits long, but the exact length depends on your bank.
  • You need your account number for direct deposit, wire transfers, and automatic bill payments.
  • Your account number is unique to your checking account; your routing number is shared with all customers at your bank.

How to locate your account number if you don't have a check

If you don't have a check in front of you, your account number appears in several other places. Log into your bank's website or mobile app and look at your account details or account summary page — the account number is usually displayed prominently at the top. You can also call your bank's customer service line and provide your name and Social Security number; they'll read it to you over the phone.

Your bank statement also lists your account number at the top of the first page. If you receive paper statements, this is often the easiest place to find it. Online statements work the same way — log in to your bank's portal and open any recent statement.

Some banks print the account number on your debit card, though not all do. Check the back of your card or the materials that came with it when you opened the account.

Why banks print account numbers on checks

Checks are processed by machines that read the numbers at the bottom using magnetic ink character recognition (MICR). The routing number tells the machine which bank to send the check to. The account number tells that bank which account within the bank to debit. The check number helps you and your bank track which check this is in your sequence.

This system has been in place since the 1950s and still works the same way today, even though most payments now happen electronically. Banks continue to print these numbers on checks because the infrastructure for reading them is already in place and widely used.

What to do if you need to share your account number

When you set up direct deposit for a paycheck or tax refund, your employer or the government agency will ask for your routing number and account number. You can safely share these two numbers — they're printed on every check you write, so they're not secret. What you should never share is your PIN, your online banking password, or the full magnetic stripe data from your debit card.

If someone asks for your account number over the phone and you didn't call them, hang up and call your bank directly using the number on the back of your debit card or your bank statement. Scammers sometimes call pretending to be from your bank and ask for account information to "verify" your identity.

Account numbers and check routing: the difference

Your routing number identifies your bank or credit union. If you have accounts at two different banks, both accounts have the same routing number as every other customer at that bank. Your account number identifies your specific account within that bank. If you have two checking accounts at the same bank, they have the same routing number but different account numbers.

When you receive a wire transfer or direct deposit, both numbers are required because the system needs to know which bank to send the money to (routing number) and which account at that bank to deposit it into (account number). One without the other won't work.

Account numbers on different types of checks

Personal checks, business checks, and cashier's checks all have account numbers printed on the bottom. For personal and business checks, the account number belongs to the person or business whose name appears on the check. For a cashier's check, the account number belongs to the bank itself, not to you — the bank is essentially guaranteeing the check with its own funds.

If you order new checks from your bank or from a third-party printer, the account number will be the same as on your current checks. The only time your account number changes is if you close the account and open a new one, or if your bank merges with another bank and reassigns account numbers to all customers.

Frequently Asked Questions

Can someone use my account number to steal money from my account?

Your account number alone is not enough to withdraw money or make unauthorized transfers. A thief would also need your PIN, online banking password, or access to your debit card. Sharing your routing and account number for direct deposit or wire transfers is safe because the recipient can only deposit money, not withdraw it.

What if the numbers on my check are smudged or hard to read?

Call your bank and provide your name and account details. They can read your account number to you over the phone. You can also log into your online banking account or check a recent bank statement. If you need the numbers for a form, your bank can print a verification letter with both numbers clearly listed.

Do I need both the routing number and account number for a wire transfer?

Yes. The routing number tells the sending bank which bank to send the money to. The account number tells that bank which account to deposit it into. Without both, the transfer cannot be completed. Some banks also ask for the account holder's name as a final verification step.

Is my account number the same as my check number?

No. Your check number is the four-digit number on the far right of the bottom line. Your account number is the middle set of digits. The check number changes with each check you write; your account number stays the same for the life of the account.