Your account number is the second set of digits printed on the bottom of your check, 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. When someone deposits or cashes one of your checks, they use both the routing number and account number to know exactly which account to pull the money from. Without the account number, the routing number alone only tells them which bank — not which account at that bank.

You'll also see your account number printed in the top right corner of the check, but the bottom version is the one used for processing. The bottom numbers are printed in a special magnetic ink called MICR (Magnetic Ink Character Recognition), which allows check-processing machines to read them automatically.

Key Takeaways

  • Your account number is the middle set of digits on 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, though the exact length depends on your bank.
  • The account number appears both at the bottom of the check in magnetic ink and in the top right corner in regular print.
  • You need both your routing number and account number together for direct deposits, wire transfers, and other electronic payments.

Why banks print the account number twice

The account number appears in two places on your check for different reasons. The version at the bottom in magnetic ink is for machines — it's part of the MICR line that automated sorters read when checks move through the banking system. The version in the top right corner is for people — it's there so you can read it easily when you need to give your account number to someone over the phone or write it on a form.

Both numbers are identical. If you can't read the magnetic ink version at the bottom clearly, you can always use the printed version in the top right.

What to do if you can't find your account number on a check

If your checks are very old, faded, or damaged, the numbers may be hard to read. You can find your account number in several other places without needing a check at all. Your bank statement lists it at the top. Your online banking login shows it in your account details. You can also call your bank's customer service line, and they'll read it to you after confirming your identity.

If you've ordered new checks but they haven't arrived yet, don't wait for them — use one of these other methods instead. Your bank can give you the number when ready.

The order of numbers matters when you're setting up payments

When you give someone your banking information for a direct deposit, automatic bill payment, or wire transfer, the order is always the same: routing number first, then account number. Some forms ask for them separately in labeled boxes, which makes it obvious. Other forms ask you to write them together, and getting them backwards will cause the payment to fail or go to the wrong account.

If you're ever unsure which number goes where, ask the person or organization receiving the information. It's better to ask than to reverse them and have a payment disappear.

Account numbers are not the same as check numbers

The check number is the third set of digits on the bottom of your check, printed on the far right. This number is unique to each individual check — your first check is numbered 1001, your second is 1002, and so on. The account number, by contrast, stays the same for every check you write from that account.

The check number helps you and your bank track which specific check you're talking about if there's a problem. The account number tells the banking system which account the money should come from. You need both pieces of information to process a check, but they serve completely different purposes.

Keeping your account number safe

Your account number is printed on every check you write, which means anyone who receives a check from you will see it. This is normal and expected — the number has to be visible for the check to work. However, you should still be cautious about sharing your account number with people you don't know or trust.

If someone calls or emails asking for your account number, verify who they are before you give it. Legitimate businesses you already work with (your employer, your utility company, your landlord) may need it for direct deposits or automatic payments, and that's fine. Strangers asking for it over the phone or in an unsolicited email are a red flag.

Frequently Asked Questions

Is the account number the same on all my checks from the same account?

Yes. Every check from the same account has the same account number printed on it. Only the check number changes from check to check. If you have multiple accounts at the same bank, each account has its own account number, and checks from different accounts will have different account numbers.

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

Your account number alone is not enough to transfer money out of your account. A thief would also need your routing number, and even then, most unauthorized transfers require additional verification like a password or PIN. However, you should still protect your account number and report any suspicious activity to your bank when ready.

What if the numbers at the bottom of my check are smudged or unclear?

Call your bank or log into your online account to find your account number. You can also look at your bank statement, which lists your account number at the top. You don't need a check to find this information — your bank can provide it in multiple ways.

Do I need my account number for mobile check deposits?

No. When you deposit a check through your bank's mobile app, the app reads the routing number and account number from the check automatically using the camera. You don't have to type anything in. The app handles all the number-reading for you.