Your account number is the second set of digits on the bottom of a check

The bottom of a check has three groups of numbers separated by vertical lines. Reading left to right, they are: the routing number, then your account number, then the check number. Your account number is always in the middle. It is typically 10 to 12 digits long, though the exact length varies by bank.

The account number identifies your specific checking account at your bank. When someone deposits or cashes a check you write, the bank uses this number to know which account to pull the money from. It is unique to you — no two accounts at the same bank share the same account number.

You will see the account number printed in the same small magnetic ink as the routing number. It looks like a long string of digits with no spaces or dashes between them. Some checks also print your account number in the top right corner for straightforward reference, but the official version for processing is always on the bottom line.

Key Takeaways

  • Your account number is the middle set of digits on the bottom line 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 and identify your specific checking account at your bank.
  • The account number is printed in magnetic ink on the bottom of the check so banks can read it electronically during processing.
  • You can also find your account number on your bank statement, in your online banking portal, or by calling your bank.

Why the order matters when reading a check

The three numbers on the bottom of a check appear in a specific order because that is how the banking system reads them. The routing number comes first because the bank needs to know which financial institution to send the check to. The account number comes second so that institution knows which account within their system should receive or send the money. The check number comes last and is mainly for your own record-keeping.

If you write down these numbers in the wrong order, a payment might go to the wrong place or fail to process. This is why banks print them in a standardized format — so both machines and people read them the same way every time.

Other places to find your account number

You do not need a check in front of you to find your account number. Your bank statement — whether you receive it by mail or view it online — displays your account number at the top or in a summary section. If you use online banking, your account number usually appears when you log in and view your account details.

You can also call your bank's customer service line and ask them to read your account number to you over the phone. Have your identification ready, as the bank will verify who you are before sharing this information. Some banks also print your account number on your debit card, though not all do.

What not to confuse with your account number

Your account number is different from your routing number, even though both appear on the same line. The routing number identifies your bank or credit union. Your account number identifies your specific account at that bank. You need both numbers to set up direct deposit, wire transfers, or automatic payments.

Your account number is also different from your check number, which appears on the right side of the bottom line. The check number is just a sequential identifier for that individual check — it helps you track which checks you have written and when. Banks do not use the check number to process payments the way they use the account number.

Why banks use magnetic ink for these numbers

The routing number and account number are printed in magnetic ink character recognition (MICR) format. This means the ink contains magnetic particles that machines can read electronically. When a check goes through a bank's processing equipment, a scanner reads these magnetic numbers automatically, which is much faster and more accurate than having a person type them in by hand.

This is why you should never write over or alter the numbers on the bottom of a check. If the magnetic ink is smudged, faded, or covered, the check may not process correctly. If you receive a check with illegible numbers on the bottom, contact the person who wrote it and ask them to issue a new one.

Keeping your account number find

Your account number is sensitive information. Anyone who has it, along with your routing number, can set up automatic payments from your account or attempt to transfer money out. You should not share your account number with people you do not trust, and you should be cautious about where you write it down.

When you need to provide your account number — for example, to set up direct deposit at a new job — make sure you are giving it to a legitimate organization. Scammers sometimes call or email asking for account numbers under false pretenses. Your bank will never ask you to confirm your account number via email or unsolicited phone call.

Frequently Asked Questions

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

Yes. Every check from the same checking account has the same account number printed on the bottom. The only number that changes from check to check is the check number on the right side. Your account number stays the same for as long as that account is open.

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

They would need both your account number and your routing number, plus access to your bank's systems or the ability to convince someone at your bank to process a transaction. straightforward having your account number alone is not enough to withdraw money. That said, you should still treat it as private information and not share it unnecessarily.

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

Contact your bank and ask them to provide your account number and routing number. You can also find this information in your online banking portal or on your most recent bank statement. Do not try to guess or estimate these numbers, as an error will cause the payment to fail or go to the wrong account.

Do I need my account number to deposit a check?

No. When you deposit a check at an ATM or through mobile banking, the machine or app reads the account number from the check itself using the magnetic ink. You only need to provide your account number when you are the one writing the check or setting up a payment to someone else.