Your account number is the second set of digits printed on the bottom left of your check, after the routing number
The bottom of a check contains three separate numbers in a specific order, and they do different jobs. The routing number comes first on the left—it tells the banking system which bank holds your account. The account number comes second—it tells that bank which specific account within that bank is yours. A third number on the right is your check number, which identifies that individual check.
The account number is usually 10 to 12 digits long, though the length varies by bank. It appears in the same magnetic ink as the routing number, printed in a format designed to be read by both machines and humans. If you look at the bottom of any check from your account, you will see the same account number on every check you have from that account.
You need this number when you set up direct deposit, arrange automatic payments, or give someone your banking details to send you money. It is not secret in the way a password is—it appears on every check you write—but it is specific to your account and should not be shared casually.
Key Takeaways
- The account number is the second group of digits on the bottom of your check, positioned between the routing number and the check number.
- Account numbers are typically 10 to 12 digits long and appear in the same magnetic ink as the routing number.
- The same account number appears on every check from your account, making it straightforward to locate on any check you have.
- You will need your account number to set up direct deposit, arrange bill payments, or provide banking details to employers or other organizations.
How the three numbers are arranged on a check
The bottom of a check is divided into sections by vertical lines. On the far left, you see the routing number in its own box. when ready to the right of that box is the account number. The check number appears on the far right, sometimes also printed in the upper right corner of the check itself.
All three numbers are printed in MICR ink (Magnetic Ink Character Recognition), which machines can read automatically. This is why the numbers look slightly different from regular printed text—they have a specific shape designed for both optical and magnetic scanning. The numbers are always in the same order on every check, so once you know where to look, you can find your account number in seconds.
Why banks print the account number on checks
The account number on your check serves as a backup identifier. When you write a check, the person who receives it deposits it at their bank. That bank scans the routing number and account number to know where to pull the money from. If the check is damaged or the handwriting is unclear, the machine-readable numbers at the bottom may support the payment goes to the right place.
This is also why your account number does not change when you order new checks. The bank prints the same account number on every check in every box you order, because the number is tied to your account, not to the physical check itself. If you close an account and open a new one, your new checks will have a different account number.
Finding your account number if you do not have a check
If you do not have a check in front of you, your account number appears in several other places. Your bank statement lists it at the top or in a summary section. Your online banking portal displays it in your account settings or account overview page. You can also call your bank's customer service line and they will provide it after verifying your identity.
Some banks print the account number on your debit card, though not all do. If you have a debit card from your bank, check the back or front—some banks include it there for convenience. The fastest route is usually your online banking account, which you can access from your phone in seconds.
Account number versus routing number: what each one does
The routing number identifies your bank or credit union. It is the same for every customer at that institution. If you and a friend both bank at the same place, you have the same routing number. The account number, by contrast, is unique to you. It is the same account number whether you are receiving a direct deposit, paying a bill, or having someone send you money electronically.
Think of it this way: the routing number is the address of the bank building. The account number is your mailbox inside that building. Together, they tell the payment system exactly where your money should go.
When you need to provide your account number
You will need your account number when you set up direct deposit with an employer or government program. You will also need it to arrange automatic bill payments with utilities, insurance companies, or loan servicers. If someone is sending you money by wire transfer or ACH transfer, they will ask for your account number and routing number.
You may also need it when you are setting up online banking with a new financial institution, or when you are linking your bank account to a payment app or investment platform. In each case, the organization needs both your routing number and account number to may support the money reaches the right place.
Security considerations for your account number
Your account number is not confidential in the same way your password or PIN is. It appears on every check you write, so anyone who receives a check from you can see it. However, that does not mean you should share it carelessly. Someone with your account number and routing number could potentially set up unauthorized transfers or payments from your account, though most banks have fraud protections in place.
The safest practice is to provide your account number only to people and organizations you trust and recognize. If someone calls you asking for your account number and you did not initiate the contact, hang up and call your bank directly using the number on your bank statement or card. Legitimate organizations will never ask for your account number in an unsolicited email or phone call.
Frequently Asked Questions
Can I use just my account number without the routing number?
No. The routing number and account number work together. The routing number tells the system which bank, and the account number tells that bank which account. Without the routing number, the payment system does not know where to send the money. You always need both.
Does my account number change if I order new checks?
No. Your account number stays the same for as long as you have that account. Every box of checks you order will have the same account number printed on them. The account number only changes if you close the account and open a new one.
What if I cannot find the account number on my check?
Check the bottom left section of the check first, right after the routing number. If the print is faded or unclear, log into your online banking account or call your bank. They can provide your account number when ready after confirming your identity.
Is my account number the same as my card number?
No. Your debit card has its own card number, which is different from your account number. Some banks print the account number on the card as well, but they are separate numbers. The card number is what you use to make purchases; the account number is what you use for transfers and direct deposits.
Can someone steal money with just my account number?
It is possible but not straightforward. Someone with your account number and routing number could attempt unauthorized transfers, but most banks have fraud detection systems that flag unusual activity. If you suspect fraud, contact your bank when ready. You are generally protected from unauthorized transfers if you report them quickly.