Your bank account number is the unique identifier your bank assigns to your specific account
Your bank account number is a string of digits—usually between 8 and 17 characters long—that identifies your individual account at your bank. It is not the same as your routing number. While your routing number tells a payment system which bank to send money to, your account number tells that bank which account within the bank should receive or send the money.
You need your account number when you set up direct deposit for tax refunds, receive insurance payouts, or arrange automatic payments. It appears on your checks, in your online banking portal, and on statements your bank sends you. Without it, a payment intended for you could be delayed or sent to the wrong account.
Key Takeaways
- Your account number is printed on the bottom left of your checks, usually after the routing number.
- You can find your account number in your online banking portal, on bank statements, or by calling your bank's customer service line.
- Never share your full account number with anyone except your employer, the IRS, or other organizations you are actively sending money to or receiving money from.
- Tax refunds and government payments require both your routing number and account number to reach the correct account.
Where to find your account number
The easiest place to look is the bottom of a check from your checking account. The account number appears after the routing number and before the check number. If you do not have checks, log into your online banking portal—most banks display your account number prominently on the account summary page or under account details.
You can also call your bank's customer service number, which is usually on the back of your debit card or on your bank's website. Have your identification ready. Some banks will read it to you over the phone; others will ask you to verify your identity and then display it in your online account.
Bank statements—whether paper or electronic—also show your account number. Look near the top of the statement, often labeled "Account Number" or "Acct #".
How your account number is structured
Account numbers vary in length depending on your bank. Most are between 8 and 17 digits, though some banks use letters and numbers together. The structure is not standardized across banks—one bank's 10-digit account number means something different from another bank's 10-digit account number.
The account number itself does not encode information about your bank, branch, or account type the way a routing number does. It is simply a unique identifier within your bank's system. If you have multiple accounts at the same bank—a checking account and a savings account, for example—each one has its own separate account number.
When you need to provide your account number
You will need your account number when you set up direct deposit for a tax refund through the IRS website or when filing your tax return. You will also need it if you receive a state tax refund, unemployment benefits, or other government payments by direct deposit.
Insurance companies, employers, and businesses that owe you money will ask for your account number when you request a refund or payment to your bank account. If you are setting up automatic bill payments from your bank account, you may need to provide your account number to the company you are paying.
Some organizations will ask for the last four digits of your account number only, as a security measure. If they ask for the full number, verify that you are communicating with the real organization before you share it.
Security: what to do and what not to do
Share your account number only with organizations you trust and that have a legitimate reason to receive it—your employer, the IRS, your bank, insurance companies processing a refund, or businesses you are actively paying. Do not post your account number on social media, in emails to unknown recipients, or on unsecured websites.
If someone contacts you claiming to be from your bank or the IRS and asks for your account number without you having initiated contact, do not provide it. Scammers sometimes pose as government agencies or banks to steal account information. Hang up and call the organization directly using a phone number from their official website or the back of your card.
If you believe your account number has been compromised, contact your bank immediately. They can monitor your account for unauthorized activity and issue you a new account number if necessary.
The difference between account number and routing number
Your routing number identifies your bank or credit union. Your account number identifies your specific account at that bank. Both are required for direct deposit and electronic transfers. Think of it this way: the routing number is the address of the bank building, and the account number is the mailbox inside that building.
When you provide both numbers together, the payment system knows exactly where to send your money. If you provide only one, the payment will not go through. For tax refunds and government payments, the IRS or state agency will ask for both your routing number and your account number.
What happens if you give the wrong account number
If you provide an incorrect account number when setting up direct deposit for a tax refund, the refund will either be rejected or deposited into the wrong account. If it goes to the wrong account, you will need to contact that bank and ask them to reverse the deposit, then resubmit your refund request with the correct account number.
This process can add weeks to your refund timeline. Double-check your account number before you submit it to the IRS, your state tax agency, or any other organization. If you are unsure, call your bank and confirm the number before you proceed.
Frequently Asked Questions
Is my account number the same as my card number?
No. Your debit or credit card number is different from your bank account number. Your card number is printed on the front of your card. Your account number is on the bottom of your checks or in your online banking portal. You need your account number for direct deposit, not your card number.
Can someone steal money from my account if they know my account number?
Your account number alone is not enough to steal money. A thief would also need your routing number and usually your name and address. Even with all that information, most banks require additional verification before processing a transfer. Still, do not share your account number with strangers or on unsecured websites.
What if I do not have checks?
Log into your online banking portal or call your bank's customer service line. Both will provide your account number. You do not need to order checks to find it. Some banks also display it on your debit card or in their mobile app.
Do I need to memorize my account number?
No. Write it down and keep it in a safe place, or store it in a password-protected note on your phone or computer. You do not need to memorize it, but you should have it available when you need to provide it for direct deposit or other transactions.
Will my account number change if I move or switch branches?
No. Your account number stays the same even if you move to a different city or switch to a different branch of the same bank. It only changes if your bank merges with another bank or if you close the account and open a new one.