Check your checks or debit card first

Your bank account number is printed on the bottom left of every check you own. Look at the series of numbers after the routing number — that's your account number, usually 10 to 12 digits long. If you don't have checks handy, your debit card also carries this information on the back, though it's often abbreviated or printed in a smaller font.

The order on a check reads left to right: routing number, then account number, then check number. The account number is the middle set. Write it down exactly as it appears — banks are strict about digit-for-digit accuracy when you're setting up transfers or payments.

Log into your online banking portal

Your bank's website or mobile app will display your account number in multiple places. Sign in, then look for a section labeled "Account Details," "Account Information," or "My Accounts." Most banks show the full account number right there on the dashboard or in a dropdown menu.

If you can't find it on the main screen, check under settings or profile information. Some banks hide the full number for security and show only the last four digits by default — if that's the case, click "show full account number" or a similar option. You may need to verify your identity with a security question or temporary code sent to your phone.

Call your bank's customer service line

The phone number is on the back of your debit card or on your monthly statement. Tell the representative you need your account number. They'll ask you to verify your identity — usually your Social Security number, date of birth, and the answer to a security question you set up when you opened the account.

This method takes 5 to 10 minutes but works if you've lost your cards and don't have online access. Write down the number they give you and repeat it back to confirm you have it right.

Check your monthly bank statement

Paper statements mailed to your home print your account number at the top of the first page, usually next to your name and address. If you receive electronic statements, open the PDF and look at the header — the account number is there too.

Statements arrive monthly, so this works only if you have a recent one. If you need the number urgently and your next statement hasn't arrived, use one of the faster methods above instead.

Visit your bank branch in person

Walk in with a photo ID and ask a teller for your account number. They'll pull up your account on their system and read it to you. This is the slowest option but guarantees accuracy and works if you have no other way to access the information.

Bring your ID and be ready to answer security questions. Most branches can help you within a few minutes during business hours.

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

If you've tried the methods above and still can't locate it, contact your bank directly — don't guess or use a number you're unsure about. Entering the wrong account number when setting up a direct deposit, wire transfer, or automatic payment can send money to the wrong person's account, and recovering it takes weeks.

Your bank can issue you a new debit card with the number printed on it, reprint your last statement, or simply read the number to you over the phone. There's no penalty for asking, and it's faster than troubleshooting a misdirected payment later.

Key Takeaways

  • Your account number appears on the bottom left of every check you write, after the routing number.
  • Log into your bank's website or app and look under Account Details or Account Information to see your full account number.
  • Call your bank's customer service line on the back of your debit card and verify your identity to have the number read to you.
  • Never guess at your account number — entering it wrong sends money to the wrong account and recovery takes weeks.
  • Your monthly bank statement prints your account number at the top of the first page.

Frequently Asked Questions

Is my account number the same as my routing number?

No. Your routing number identifies your bank; your account number identifies your specific account at that bank. Both appear on your checks, with the routing number on the left and the account number in the middle. You need both for direct deposits and wire transfers.

Can someone steal money if they have my account number?

They would need both your account number and your routing number, plus authorization to move the money. Having only your account number is not enough to drain your account, but don't share it with people you don't trust. If you suspect fraud, contact your bank immediately.

Why does my online banking show only the last four digits?

Banks hide full account numbers by default for security. Click "show full account number," "view full details," or a similar button to reveal it. You may need to answer a security question or verify your identity first.

What if I have multiple accounts at the same bank?

Each account has its own number. Log into your online banking and select the specific account you need — the account number will display for that one. If you have a checking and savings account, they are separate and have different numbers.