The account number is the second set of digits on the bottom of your check
Your checking account number appears on the bottom left of a check, printed between two sets of numbers. The first set is your bank's routing number (nine digits). The second set, which comes right after it, is your account number. Account numbers are typically 10 to 12 digits long, though the length varies by bank.
The order on the bottom of the check is always: routing number, then account number, then check number. All three are printed in a special magnetic ink that machines can read. If you look at the bottom left corner of any check from your account, you will see these three groups of numbers separated by small vertical lines.
You need the account number when you set up direct deposit, arrange automatic bill payments, or receive a wire transfer. It tells the bank which account within your name the money should go to, since one person can have multiple accounts at the same bank.
Key Takeaways
- Your account number is the middle set of digits on the bottom of your check, between the routing number and the check number.
- Account numbers are typically 10 to 12 digits long, though this varies by bank.
- You need your account number for direct deposit, automatic payments, and incoming wire transfers.
- If you do not have a check, you can find your account number on your bank statement or by logging into your online banking account.
- Never share your full account number with anyone you do not trust, and avoid writing it on envelopes or in emails.
How to read the MICR line at the bottom of your check
The bottom of a check contains what banks call the MICR line — MICR stands for Magnetic Ink Character Recognition. This line holds three separate pieces of information printed in a special ink that check-reading machines can scan and process automatically.
Reading from left to right, you will see: the routing number (9 digits), a colon or vertical line, the account number (usually 10 to 12 digits), another vertical line, and finally the check number (usually 4 to 6 digits). The check number also appears in the top right corner of the check in regular print, so you can cross-reference it if you are unsure which set of digits is which.
The routing number identifies your specific bank branch. The account number identifies your specific account within that bank. The check number is simply the sequential number of that particular check in your checkbook. All three work together so the bank knows exactly where to pull the money from when the check is deposited.
Finding your account number without a check
If you do not have a check in front of you, your account number appears in several other places. Your bank statement — whether paper or online — lists your account number at the top or in a header section. It is usually labeled "Account Number" or "Acct #" and is one of the first pieces of information on the page.
Log into your online banking account and look for an account summary or account details page. Most banks display your account number prominently on the dashboard or in a settings menu. You can also call your bank's customer service line and provide your name and Social Security number; they will read your account number to you over the phone.
Your debit card does not print your account number on it, so do not look there. Your routing number and account number are separate from your card number, PIN, or CVV.
Why banks print the account number on checks
Checks are designed to be processed by machines, not just by people. When you write a check and hand it to someone, they deposit it at their bank. That bank scans the MICR line at the bottom using a machine reader, which instantly pulls your routing number and account number from the magnetic ink. The machine then sends that information to your bank to pull the funds from your account.
Without the account number printed on the check, the bank processing the deposit would have no way to know which of your accounts to take the money from. The routing number alone only identifies the bank; the account number identifies your specific account within that bank. Together, they form a complete address for where the money should come from.
This is also why the account number must be accurate. If you give someone the wrong account number, the money will be deposited into the wrong account — possibly someone else's account at the same bank. This is rare but has happened when people misread or misremember their own account number.
Keeping your account number secure
Your account number is semi-public information — it appears on every check you write, and anyone who receives a check from you can see it. However, you should still treat it with reasonable care. Do not write your account number on envelopes, in emails, or in text messages unless you are certain you are communicating with your bank or a trusted financial institution.
When you provide your account number to set up direct deposit or automatic payments, do so only through secure channels: your employer's payroll system, your bank's website, or a phone call you initiated to a number on your bank statement. Do not provide it in response to an unsolicited call or email, even if the caller claims to be from your bank.
If you suspect your account number has been compromised or misused, contact your bank immediately. They can monitor your account for unauthorized activity and, if necessary, close the account and issue you a new one with a new account number.
Account numbers across different banks and account types
Account numbers vary in length depending on your bank. Most are 10 to 12 digits, but some banks use shorter or longer numbers. This does not affect how the account works; it is simply how that bank's system is structured. Your bank's routing number stays the same regardless of which account you have, but each account you hold at that bank has its own unique account number.
If you have a savings account and a checking account at the same bank, each one has a different account number. The routing number will be the same for both, but the account numbers will be distinct. This allows you to direct deposits or payments to the correct account. If you close an account and open a new one later, you will receive a new account number; the old one will no longer be active.
When you move banks, your new bank will assign you a new routing number and new account numbers. Your old checks will no longer work because they contain your old bank's routing number and your old account number. This is why banks send you new checks when you open an account.
Frequently Asked Questions
Can someone steal money from my account if they have my account number?
Having only your account number is not enough to steal money. A thief would also need your routing number, and even then, they cannot simply withdraw funds — they would need to initiate a transfer or write a fraudulent check. Your bank has fraud protections in place. If you notice unauthorized activity, report it immediately.
Is my account number the same as my debit card number?
No. Your debit card number is a separate 16-digit number printed on the front of your card. Your account number is the number on the bottom of your checks. They are different numbers that serve different purposes. Your debit card number is used for card transactions; your account number is used for bank transfers and direct deposits.
What if I give someone my account number by mistake?
Contact your bank right away. They can monitor your account for suspicious activity. In most cases, nothing will happen — your account number alone is not enough to access your funds. But your bank can help you watch for fraud and take action if needed.
Do I need my account number to receive a direct deposit?
Yes. Your employer or the organization sending the deposit needs both your routing number and your account number to deposit money into the correct account. You can find both on a check or by logging into your online banking account.
What if my checks do not have the MICR line printed clearly?
Contact your bank and request a replacement checkbook. Checks with faded or unclear MICR lines may not process correctly through automated systems. Your bank can reprint your checks at no cost if there is a printing defect.