Your account number is on your checks, your bank statement, and your online banking portal

The fastest place to look is a check from your checking account. Open the box and look at the bottom left of any check. You will see three sets of numbers separated by colons or vertical lines. The middle set is your routing number; the set after that is your account number. It is usually 10 to 12 digits long, though the length varies by bank.

If you do not have checks handy, log into your bank's website or mobile app. Your account number appears on the account summary page, usually near the top where it shows your balance. Some banks label it "Account Number" directly; others call it "Account ID" or list it under account details. The exact location depends on your bank's interface, but it is always visible without digging.

Your most recent bank statement also shows your account number at the top or in a section labeled "Account Information." You can find this in paper form if the bank mailed it, or by downloading a PDF from your online banking portal.

Key Takeaways

  • Your account number appears at the bottom of any check you have, in the second set of numbers after the routing number.
  • Log into your bank's website or app and look for the account summary page, which displays your account number near your balance.
  • Bank statements—whether printed or downloaded as a PDF—show your account number in the account information section.
  • Account numbers are typically 10 to 12 digits, but the exact length varies by bank and account type.
  • Never share your full account number with anyone who contacts you unsolicited; legitimate businesses already have it if they need it.

Why you need your account number and when to use it

Your account number identifies which specific account at your bank the money should move to or from. When you set up direct deposit at a new job, you provide your account number so payroll knows where to send your paycheck. When you authorize an automatic bill payment, the biller uses your account number to pull money from the right account on the scheduled date.

You also need it to receive wire transfers from someone outside your bank, to set up transfers between your own accounts at different banks, or to give to a financial institution that needs to verify your identity. The account number, combined with your routing number, creates a unique address for your account—like a mailing address for money.

The difference between account number and routing number

Your routing number tells the banking system which bank to send money to. Your account number tells that bank which account within the bank to deposit it into. Think of the routing number as the bank's address and the account number as your mailbox number inside that bank.

On a check, the routing number comes first (the leftmost set of numbers), and the account number comes second. Both are printed in magnetic ink at the bottom of the check so they can be read by sorting machines. You need both numbers together to complete most transfers or direct deposits. If you provide only one, the transaction will not go through.

What to do if you cannot find your account number

Call your bank's customer service line. The number is on the back of your debit card, on your bank statement, or on the bank's website. Tell them you need your account number. They will verify your identity by asking for your Social Security number, date of birth, or answers to security questions you set up when you opened the account. Once verified, they will read your account number to you over the phone.

You can also visit a branch in person with a photo ID. A teller can print your account number for you or write it down on the spot. This is useful if you need it when ready and do not want to wait on hold.

Account numbers for different account types

Most people have one account number per account they own. If you have a checking account and a savings account at the same bank, each one has its own account number. If you have a joint account with someone else, that account has one number shared between both account holders. When you close an account, that account number is retired and cannot be reused.

Some banks assign different account numbers for different purposes—for instance, a separate number for your money market account or your certificate of deposit. Each account you hold, regardless of type, has its own unique identifier. If you are unsure which account number belongs to which account, your bank statement will label each one clearly.

Security: when to share your account number and when not to

Share your account number with people and organizations you trust and who have a legitimate reason to use it: your employer's payroll department, your utility company for automatic bill payment, a business you are sending money to, or a financial institution helping you move money between banks. These entities need the number to complete the transaction you initiated.

Do not share your account number with anyone who calls or emails you unsolicited, even if they claim to be from your bank. Your bank already has your account number—they do not need to ask for it. Do not post it on social media or in public forums. If someone has your account number and routing number but not your online banking password, they cannot access your account, but they can attempt to set up unauthorized transfers or payments. Keep it as private as you would keep your address.

Frequently Asked Questions

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

No. Your debit card number is printed on the front of the card and is different from your account number. The account number is printed at the bottom of your checks in magnetic ink. A debit card number is used for card transactions; an account number is used for transfers and direct deposits.

Can someone withdraw money if they only have my account number?

Not without additional information. They would need your routing number as well, and even then they cannot access your account online. They could attempt to set up an unauthorized automatic payment or transfer, which is why you should monitor your account regularly and report suspicious activity to your bank when ready.

What if my account number has letters in it?

Account numbers are almost always all digits. If you see letters, you may be looking at a different identifier—perhaps a customer ID number or a reference number from a transaction. Double-check the location on your check or statement. If your bank truly uses letters in account numbers, ask them to confirm which set of characters is your account number.

Do I need my account number to check my balance?

No. You can check your balance by logging into your online banking portal with your username and password, calling your bank's automated phone line, or visiting a branch. Your account number is only needed when you are moving money or setting up a transaction that involves another party.

Will my account number change if I change banks?

Yes. Each bank assigns its own account numbers. If you move your money to a new bank, you will receive a new account number at the new bank. You will need to update any automatic payments or direct deposits with the new routing number and account number.