Your account number is printed at the bottom left of the check, after the routing number

The bottom of a check contains three separate numbers printed in magnetic ink, read left to right. The first number is your bank's routing number. The second number, which comes when ready after, is your account number. The third is the check number itself. Your account number is typically 10 to 12 digits long, though this varies by bank.

The account number identifies your specific checking account within your bank's system. When someone deposits or cashes your check, the routing number tells the banking system which bank to send the money to, and the account number tells that bank which account within their system should receive or send the funds.

If you look at a check from your bank, you will see these numbers printed in a special typeface at the bottom. They are always in the same order and always in the same location on every check from your account.

Key Takeaways

  • Your account number appears at the bottom of the check, positioned between the routing number on the left and the check number on the right.
  • Account numbers are typically 10 to 12 digits, though the exact length depends on your bank.
  • The account number is printed in magnetic ink and is machine-readable, which is how banks process checks automatically.
  • You can also find your account number on your bank statements, your debit card, or by logging into your bank's online portal.

The order of numbers at the bottom of a check

Reading from left to right, the bottom of your check displays: routing number, account number, then check number. Each set of numbers is separated by a small space or symbol. The routing number comes first because it is processed first — the banking system uses it to determine which bank to contact. Once the payment reaches your bank, the account number directs it to the correct account.

The check number on the far right is for your own record-keeping. It matches the number printed in the upper right corner of the check. Banks do not use the check number to process the payment; they use it only to help you track which check you wrote.

Why the account number matters for payments

Your account number is essential for any payment that uses your checking account. When you set up automatic bill payments, provide banking details to an employer for direct deposit, or give someone your account information for a wire transfer, you are providing your account number along with your routing number. Without the correct account number, the payment goes to the wrong account or fails entirely.

This is why it is critical to double-check the account number when you share it. A single digit wrong means the money lands in someone else's account. If this happens, the receiving bank can sometimes trace and recover the funds, but it requires time and effort from both banks.

Other places to find your account number

You do not have to look at a physical check to find your account number. Your bank statement — whether printed or online — displays your account number at the top or in a summary section. Your debit card also has your account number printed on it, usually on the front below your name. If you log into your bank's website or mobile app, your account number appears in the account details or summary page.

If you have lost all your checks and cannot access your online banking, you can call your bank's customer service line. They will verify your identity and provide your account number over the phone. Some banks also print your account number on receipts from ATM withdrawals or deposits.

How to read the magnetic ink line correctly

The numbers at the bottom of your check are printed in MICR ink — magnetic ink character recognition. This special ink allows machines to read the numbers automatically during check processing. The numbers are printed in a distinctive typeface that looks slightly different from regular text, which makes them easier for machines to scan.

When you look at the bottom of a check, you may notice the numbers appear slightly raised or have a particular font style. This is intentional. The magnetic properties of the ink and the specific typeface allow high-speed check-sorting machines to read thousands of checks per hour without errors. If you write over these numbers or damage them, the check may not process correctly.

What happens if your account number is wrong

If you provide an incorrect account number, the payment typically fails or goes to the wrong account. If it goes to the wrong account, the receiving bank is responsible for notifying the account holder that money arrived in error. That person is then obligated to return the funds, though this process can take days or weeks.

If a payment fails because of a wrong account number, you will usually receive a notification from your bank or the organization trying to pay you. Direct deposits that fail are typically resubmitted with corrected information. Checks written with the wrong account number on them (which is rare, since your checks are pre-printed) would need to be replaced.

Protecting your account number

Your account number, combined with your routing number, is sensitive information. Anyone with both numbers can potentially set up payments from your account or attempt unauthorized transfers. You should share your account number only with people and organizations you trust — your employer for direct deposit, your landlord for rent payments, or your utility company for bill pay.

Do not share your account number via email or text unless you initiated the request and are certain you are communicating with a legitimate organization. Scammers sometimes pose as banks or service providers to collect account numbers. If someone contacts you asking for your account number, hang up and call the organization directly using a phone number from their official website or statement.

Frequently Asked Questions

Is the account number the same as the number on my debit card?

No. Your debit card has its own card number, which is different from your checking account number. The card number is used for credit card transactions and online purchases. Your account number is used for bank transfers, direct deposits, and check processing. Both numbers connect to your checking account, but they serve different purposes.

Can I use just the account number without the routing number?

No. The routing number and account number must be used together. The routing number tells the banking system which bank to contact, and the account number tells that bank which account within their system to use. Without both numbers, the payment cannot be processed correctly.

What if I cannot read the numbers at the bottom of my check?

If the magnetic ink numbers are faded, smudged, or damaged, contact your bank and request a replacement set of checks. Do not attempt to write over the numbers or use the check for payments, as it may not process. Your bank can print new checks with clear, readable numbers within a few business days.

Does my account number change if I close and reopen an account?

Yes. When you close a checking account and open a new one, you receive a new account number. This is why it is important to update your account information with your employer, service providers, and anyone else who makes regular payments to your account. Using an old account number after closing the account will cause payments to fail.