Your account number is the second set of digits on the bottom left of your check
The bottom of a check shows three separate groups of numbers, read left to right. The first group is your routing number (nine digits). The second group is your account number (typically 10 to 12 digits, though this varies by bank). The third group is the check number (usually three to four digits on the right side).
Your account number identifies which specific account at your bank the check draws from. If you have multiple accounts—a checking account and a savings account, for example—each has its own account number. The routing number stays the same across all your checks because it identifies your bank branch. The account number changes if you open a new account.
You can also find your account number on your bank statement, in your online banking portal, or by calling your bank's customer service line. You do not need to look at a physical check to locate it.
Key Takeaways
- Your account number is the middle set of numbers printed on the bottom of a check, between the routing number and the check number.
- Account numbers are typically 10 to 12 digits long, though the exact length depends on your bank.
- Each account you hold has a different account number, even if they are at the same bank.
- You will need your account number when setting up direct deposit, arranging wire transfers, or providing banking details to an employer or creditor.
- Your bank statement and online banking portal both display your account number if you do not have a check available.
Why you need to know which number is which
Confusing your account number with your routing number can cause payments to go to the wrong place or fail entirely. When you set up direct deposit for a paycheck or arrange a bill payment, you will be asked for both numbers separately. Entering the routing number where the account number belongs means your employer or creditor cannot find your account, and the transaction will not process.
The same problem occurs when you provide banking details to someone paying you—a refund processor, a government agency, or a business sending you money. They use the routing number to find your bank and the account number to find your specific account within that bank. Without both correct numbers in the right places, the money does not arrive.
How to read the numbers on the bottom of a check
The numbers on the bottom of a check are printed in a special machine-readable format called MICR (Magnetic Ink Character Recognition). This format allows banks to process checks automatically. The numbers appear in this order from left to right:
| Position | What It Is | How Many Digits | What It Identifies |
|---|---|---|---|
| First (leftmost) | Routing number | 9 digits | Your bank and branch |
| Second (middle) | Account number | 10–12 digits (varies) | Your specific account |
| Third (rightmost) | Check number | 3–4 digits | This individual check |
The account number is sometimes preceded or followed by a symbol (often a colon or vertical line). Ignore symbols and count only the digits themselves. If you are unsure which digits belong to the account number, look at the length: routing numbers are always exactly nine digits, and check numbers are always three or four digits. Everything in between is your account number.
When you should not share your account number
Your account number is safe to share with legitimate businesses that need it—your employer for direct deposit, your bank for wire transfers, a creditor for payment arrangements, or a government agency processing a refund. These organizations need it to send money to the correct place.
Do not share your account number with someone who contacts you unexpectedly asking for it, especially if they claim to be from your bank, the IRS, or a government agency. Real banks and government offices do not call or email asking for account numbers. If someone claims your account has a problem or you are owed money and asks for your account number to "verify" or "confirm" it, hang up or delete the message and contact the organization directly using a phone number or website you know is legitimate.
Scammers use account numbers to set up unauthorized transfers or recurring charges. If you have given your account number to someone you now distrust, contact your bank when ready and ask them to monitor the account for unauthorized activity.
What to do if you cannot find your account number
If you do not have a check in front of you, your bank can provide your account number in seconds. Log into your online banking portal—the account number usually appears at the top of your account summary or in the account details section. You can also call your bank's customer service line and ask them to read it to you. Have your identification ready, as the bank will verify who you are before sharing account information.
Your bank statement (paper or electronic) also displays your account number, usually near the top. If you receive statements by mail, look at the most recent one. If you receive them by email, search your inbox for the most recent statement and open it.
If you have set up online bill pay through your bank, your account number is already on file there. You do not need to retrieve it separately.
Account numbers and fraud prevention
Your account number alone cannot be used to withdraw money from your account or make purchases. A thief would also need your routing number, and even with both numbers, they can only move money through the banking system—they cannot access your debit card, make online purchases, or drain the account when ready. Your bank has fraud detection systems that flag unusual transfers and can reverse unauthorized ones.
That said, unauthorized transfers do happen and can take time to reverse. If you notice a transfer you did not make, report it to your bank when ready. Federal law (Regulation E) protects you against unauthorized electronic transfers, but you must report the problem within a specific timeframe—usually 60 days from when you first see the unauthorized transaction on your statement. The sooner you report it, the stronger your protection.
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 your card and is different from your account number. Your account number appears only on checks and in your bank's systems. You use your debit card number for purchases and ATM withdrawals, and your account number for direct deposits and bank transfers.
Can someone steal money using just my account number?
Not easily. A thief would need both your account number and your routing number to set up a transfer, and even then, your bank monitors for suspicious activity. If an unauthorized transfer occurs, you can dispute it and your bank can reverse it. Report any suspicious activity to your bank within 60 days of seeing it on your statement.
What if the numbers on my check are smudged or hard to read?
Contact your bank and ask them to provide your account and routing numbers. Do not guess or try to read smudged numbers, as entering incorrect digits will cause transactions to fail. Your bank can confirm both numbers in seconds.
Do I need my account number to use my debit card at a store?
No. You only need your debit card itself. Your account number is used for bank-to-bank transfers, direct deposits, and bill payments—not for everyday card purchases or ATM withdrawals.