The account number is the second set of digits on the bottom left of your check, between the routing number and the check number

When you look at the bottom of a check, you see three groups of numbers printed in magnetic ink. The first group (on the far left) is your bank's routing number. The second group, in the middle, is your account number. The third group, on the right, is the individual check number. Your account number is typically 10 to 12 digits long, though the exact length varies by bank.

The account number identifies your specific deposit account at that bank. It is what the bank uses to know which account to pull money from when a check clears. Without it, the routing number alone cannot direct the payment — the routing number only tells the payment system which bank to send the money to, not which account within that bank.

You can also find your account number on your bank statement, in your online banking portal, or by calling your bank's customer service line. But the check itself is the fastest reference if you have one in front of you.

Key Takeaways

  • Your account number appears as the middle set of digits on the bottom of a check, between the routing number and the check number.
  • Account numbers are typically 10 to 12 digits, though length varies by bank.
  • The account number tells the receiving bank which specific account to deposit money into; the routing number alone is not enough.
  • You can find your account number on bank statements, in online banking, or by contacting your bank if you do not have a check available.

How the three numbers work together

The routing number and account number are a pair — they work together to move money to the right place. Think of the routing number as the address of the bank building, and the account number as the apartment number inside that building. A payment needs both to arrive correctly.

When you write a check or give someone your account and routing numbers for a wire transfer or automatic payment, the receiving bank uses the routing number to find your bank, then uses the account number to find your account within that bank. If either number is wrong, the payment either bounces back or goes to the wrong account.

Why the order matters when you are reading a check

The order of the three numbers is standardized across all U.S. banks, so once you know what you are looking for, you can find it on any check. The routing number always comes first (leftmost), the account number always comes second (middle), and the check number always comes last (rightmost). This order is the same whether you are looking at a personal check, a business check, or a cashier's check.

The numbers are printed in a special magnetic ink called MICR (Magnetic Ink Character Recognition) so that check-processing machines can read them automatically. This is why the numbers look slightly different from the printed text elsewhere on the check — they are designed to be machine-readable first, human-readable second.

What happens if you give out your account number

Your account number alone, without the routing number, is not enough for someone to withdraw money from your account. They would need both numbers, plus they would typically need additional information like your name, address, or authorization from you. However, it is still not a good idea to share your account number casually, because it is one of the two pieces of information needed for ACH transfers (automatic bank-to-bank transfers) or bill payments.

If you are setting up a legitimate payment — paying a bill, setting up direct deposit, or sending money to someone you trust — sharing your account and routing number is normal and safe. The receiving party uses those numbers to pull money from your account only if you have authorized them to do so. But do not share these numbers with someone you do not know or trust, or in response to an unsolicited request.

Finding your account number without a check

If you do not have a check in front of you, your bank statement shows your account number at the top or in the account summary section. Log into your online banking portal and look for "Account Details" or "Account Information" — your account number will be listed there. You can also call your bank's customer service number (usually on the back of your debit card) and ask them to read it to you.

Some banks also print your account number on your debit card, though not all do. If your card shows it, it is usually on the front or back near your name.

The difference between account number and account type

Your account number identifies which account you have; your account type describes what kind of account it is. A checking account and a savings account at the same bank have different account numbers but may be linked under the same customer profile. When you give someone your account number for a payment, you are telling them which specific account to use — so if you have both a checking and savings account, make sure you give them the number for the account you want the money to go into.

Some banks use a suffix or extension after the account number to distinguish between linked accounts. If you have multiple accounts, ask your bank whether you need to include a suffix when sharing your account number.

Frequently Asked Questions

Is it safe to write my account number on a check?

Yes. Your account number is already printed on every check you write, and anyone who receives a check from you can see it. The account number alone cannot be used to withdraw money without the routing number and your authorization. Checks are designed to be shared — that is their purpose.

Can someone steal money if they have my account number but not my routing number?

Not through standard banking channels. An ACH transfer or bill payment requires both the account number and the routing number. However, they could potentially use your account number in combination with other information (like your name and address) to attempt fraud, so it is still best not to share it with strangers.

What if I give the wrong account number on a check?

The check will likely be rejected or returned unpaid, because the routing and account number combination will not match any account at that bank. The payer (the person who wrote the check) would need to write a new check with the correct account number. This is why it is important to double-check account numbers before setting up automatic payments.

Do all banks print account numbers the same way on checks?

The order is always the same — routing number, account number, check number from left to right. But the exact position and formatting can vary slightly by bank. The account number is always in the middle, but some banks may print additional information or use different spacing. If you are unsure which number is which, call your bank.