Your account number is printed at the bottom left of your check, after the routing number
The bottom of every check has three groups of numbers separated by colons or vertical lines. Reading left to right, you'll see the routing number first (nine digits), then your account number (usually 10 to 12 digits), then the check number (three to four digits). Your account number is the middle group — the longest one.
The account number identifies which specific account at your bank the check is drawn from. If you have multiple accounts at the same bank, each one has its own account number. This is why the account number matters: it tells the receiving bank exactly where to deposit the money.
You'll also find your account number in other places — on your debit card, on statements your bank sends you, and in your online banking login. But the check is the most portable version if you need to give it to someone without accessing your bank account directly.
Key Takeaways
- Your account number appears at the bottom of the check in the middle group of numbers, between the routing number and the check number.
- Account numbers are typically 10 to 12 digits long and are unique to each account you hold at your bank.
- The account number tells the receiving bank which of your accounts to deposit money into.
- You can also find your account number on your debit card, bank statements, and in your online banking portal.
Why banks print the account number on checks
When you write a check, the person or business receiving it needs to know two things: which bank to contact (the routing number) and which account within that bank to deposit the money into (the account number). Without the account number, the bank would have no way to know whether the check belongs to your checking account, your savings account, or a business account you might hold.
The numbers are printed in a special machine-readable format called MICR (Magnetic Ink Character Recognition). This allows banks to process checks electronically by scanning the bottom of the check rather than reading it by hand. The format has been standard since the 1950s, which is why every check looks the same way.
What happens if you can't find the account number on your check
If your check is very old, faded, or damaged, the numbers at the bottom may be hard to read. In that case, contact your bank directly — they can tell you your account number over the phone or through your online banking account. You'll typically need to verify your identity with your Social Security number or other information only you would know.
Some banks also print your account number on the top right of the check for convenience, though this is not required. If you see numbers printed there, that's your account number as well — it's the same one as the one at the bottom.
Sharing your account number safely
Your account number is safe to share with people or businesses you trust, because they cannot withdraw money with the account number alone. They would also need your routing number, and even then they can only deposit money or set up automatic payments — they cannot take money out without additional authorization from you.
However, you should not share your account number publicly or with people you don't know. Scammers sometimes use account numbers combined with other information to commit fraud. If someone asks for your account number unsolicited, ask them why they need it and verify they work for the organization they claim to represent.
Reading the other numbers on your check
The routing number (the first group of nine digits) identifies your specific bank branch. Different banks and different branches of the same bank have different routing numbers. The routing number is what tells the receiving bank's system where to send the check for processing.
The check number (the last group, usually three or four digits) is straightforward a sequential identifier for that particular check. It helps you track which checks you've written and when. The check number appears in the top right corner of the check as well, so you can see it without flipping the check over.
Why you might need to provide your account number
You may need to give your account number when setting up direct deposit for a paycheck, arranging automatic bill payments, or receiving a wire transfer. In these cases, you'll typically provide both your routing number and your account number so the money goes to the correct place.
If someone asks you to provide your account number, you can always give them a blank check instead — they can read both numbers from it themselves. This is often safer than typing or saying the numbers aloud, because you know exactly what information they're receiving.
Frequently Asked Questions
Is my account number the same on all my checks?
Yes. Every check from the same account has the same account number printed on it. If you have multiple accounts at your bank, each account has its own unique account number, and checks from each account will show that account's number.
Can someone steal money if they have my account number?
Not with the account number alone. They would need your routing number as well, and even then they can only deposit money or set up automatic payments you authorize. They cannot withdraw money without additional information and your permission.
What if the numbers at the bottom of my check are smudged or unclear?
Contact your bank and they can provide your account number over the phone or through your online account. You'll need to verify your identity. You can also order new checks from your bank if the current ones are damaged.
Do I need to memorize my account number?
No. You can look it up on a check, your debit card, your bank statements, or your online banking account whenever you need it. Most people don't memorize it because they rarely need to provide it by hand.
Is the account number printed on my debit card the same as the one on my check?
Yes, if the debit card is connected to the same account. The account number on your card and the account number on your checks will be identical because they both refer to the same bank account.