The account number is the second set of digits printed at the bottom of your check, between the routing number and the check number.
When you look at the bottom left of a check, you will see three groups of numbers separated by vertical lines. The first group is your bank's routing number (nine digits). The second group is your account number (typically 10 to 12 digits, though this varies by bank). The third group, usually on the far right, is the check number.
The account number identifies your specific deposit account at that bank. It is printed in magnetic ink so that check-processing machines can read it automatically. When someone deposits your check, the routing number tells the banking system which bank to send it to, and the account number tells that bank which of their accounts to credit.
You will see the account number printed twice on most checks: once in the magnetic ink at the bottom, and once in the upper right corner in regular print. Both refer to the same account.
Key Takeaways
- Your account number is the middle set of digits at the bottom of your check, printed between the routing number and check number.
- Account numbers are typically 10 to 12 digits long, though the exact length depends on your bank.
- The account number appears twice on a check: once in magnetic ink at the bottom and once in regular print in the upper right.
- You need your account number when setting up direct deposit, arranging wire transfers, or providing banking details to employers or creditors.
- Never share your account number with anyone unless you have initiated the transaction yourself and trust the recipient.
Why the account number matters
Your account number is how your bank knows which account to deposit money into when someone sends you a check or initiates a transfer. Without it, the bank cannot route funds to the correct place, even if they have the correct routing number.
You will need to provide your account number in several situations: when your employer sets up direct deposit of your paycheck, when you arrange automatic bill payments, when you receive a wire transfer, or when you give banking details to a creditor or government agency. In each case, the account number ensures the money lands in your account, not someone else's.
How to read the numbers at the bottom of a check
The magnetic ink line at the bottom of a check always follows the same order: routing number, account number, check number. The numbers are printed in a special font designed to be readable by both machines and humans.
| Position | What it is | How many digits | What it tells the bank |
|---|---|---|---|
| First group (left) | Routing number | 9 digits | Which bank to send the check to |
| Second group (middle) | Account number | 10–12 digits (varies) | Which account at that bank to credit |
| Third group (right) | Check number | 4–6 digits | Which individual check this is |
If you have multiple accounts at the same bank, each one has its own account number. A business account and a personal account at the same bank will have different account numbers but the same routing number.
Where else to find your account number
If you do not have a check in front of you, your account number appears in several other places. Your bank statement—whether printed or online—shows your account number at the top or in a summary section. Your debit card may have the last four digits of your account number printed on it, though not the full number.
You can also log into your bank's website or mobile app and find your account number in the account details or settings section. If you call your bank's customer service line, they can read your account number to you after verifying your identity. Never give your full account number to someone who calls you claiming to be from your bank; legitimate banks will never ask for it this way.
Account numbers and security
Your account number is semi-public information. It appears on every check you write, and anyone who receives a check from you will see it. However, your account number alone is not enough for someone to withdraw money from your account—they would also need your routing number, and even then, most banks require additional verification.
That said, you should not share your account number casually or with people you do not trust. If you are providing it to set up a legitimate transaction (direct deposit, a wire transfer you initiated, a bill payment you requested), that is normal and necessary. If someone asks for it unexpectedly or pressures you to share it quickly, that is a sign to pause and verify who you are actually talking to.
What to do if you cannot read the numbers
If the magnetic ink at the bottom of your check is faded, smudged, or damaged, the numbers may be hard to read. In this case, you can use the printed version in the upper right corner of the check, which shows your account number in regular ink. If both are illegible, contact your bank directly—they can confirm your account number by phone or through your online account.
Do not try to guess or estimate the account number. If you provide an incorrect account number when setting up direct deposit or a transfer, the money will go to the wrong account, and recovering it can take weeks. When in doubt, verify the number with your bank before submitting it.
Frequently Asked Questions
Is my account number the same as my debit card number?
No. Your debit card number and your account number are different. Your debit card number is what you use to make purchases or withdraw cash. Your account number identifies your deposit account at the bank. Some banks print the last four digits of your account number on your debit card, but the full numbers are not the same.
Can someone take money from my account if they have my account number?
Not easily. Your account number alone is not enough to withdraw money. A person would need your routing number as well, and even then, most banks require additional verification—a signature, a PIN, or other proof of identity—before processing a withdrawal or transfer. Your account number is visible on every check you write, so banks do not treat it as a secret.
What if I have two checking accounts at the same bank?
Each account has its own account number. Both accounts will share the same routing number (because they are at the same bank), but the account numbers will be different. This is how the bank knows which account to credit when you receive a deposit.
Do I need my account number to deposit a check using my phone?
No. When you use your bank's mobile app to deposit a check, you straightforward photograph the front and back of the check. The app reads the routing and account numbers from the magnetic ink automatically, so you do not have to type them in.
Will my account number change if I close my account and open a new one?
Yes. When you open a new account at the same bank, you receive a new account number. Any checks printed for the old account will no longer work. If you have automatic payments or direct deposits set up, you will need to update them with your new account number.