Your account number is the second set of digits on the bottom left of your check

The bottom of a check contains three separate number sequences, printed in magnetic ink. From left to right, you see the routing number (nine digits), then your account number (typically 10 to 12 digits), then the check number (usually three to four digits on the right). Your account number is always in the middle position.

The account number identifies your specific deposit account at your bank. It stays the same across all checks from that account, even though each check has its own unique check number. If you have multiple accounts at the same bank, each one has a different account number.

You do not need to memorize it. Write it down or take a photo of a check when you need it for direct deposit, wire transfers, or setting up automatic payments. Most banks also display your account number in online banking and on your monthly statement.

Key Takeaways

  • Your account number appears as the middle set of digits on the bottom of any check you write.
  • It is typically 10 to 12 digits long and comes after the nine-digit routing number.
  • The same account number appears on every check from that account, but each check has a different check number.
  • You can find your account number on your bank statement, in your online banking portal, or by calling your bank's customer service line.

How the three numbers work together

The routing number tells the banking system which bank holds your account. The account number tells that bank which specific account to use. The check number is just a reference for you and your bank to track individual checks. All three are required for the check to process correctly.

When you write a check, the person or business who receives it will use the routing number and account number to deposit or cash it. The check number helps both you and your bank match the check to your records later. If a check is lost or stolen, the check number is what you report to your bank.

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. Log into your online banking account and look at the account summary or account details page—your full account number is usually displayed there. Your monthly bank statement also lists your account number at the top or in the account information section.

You can also call your bank's customer service number (usually on the back of your debit card) and ask them to read your account number to you. Have your identification ready, as banks verify your identity before sharing account details over the phone.

What your account number reveals and does not reveal

Your account number is tied to your specific account, but it does not contain information about your balance, transaction history, or personal details. Someone who knows only your account number and routing number cannot access your money without additional verification from your bank.

That said, you should treat your account number with the same care as your routing number. Share it only with people and organizations you trust—your employer for direct deposit, your landlord for rent payments, or established companies you are paying. Do not post it on social media or share it in unsecured emails.

Account numbers for different account types

Checking accounts, savings accounts, and money market accounts at the same bank each have their own account number. If you have both a checking and savings account, they will have different numbers even though they share the same routing number. This is how your bank knows which account to debit or credit when you make a transaction.

If you move money between your own accounts at the same bank, you will use both account numbers to identify which account sends the money and which receives it. When you set up a transfer to an account at a different bank, you will need that bank's routing number and the account number for the account you are sending money to.

What to do if you cannot find your account number

If you have no checks and cannot access online banking, call your bank directly. Have your name, address, and a form of identification ready. The bank will verify your identity and provide your account number over the phone. This usually takes less than five minutes.

If you are setting up direct deposit for a new job and need your account number when ready, ask your bank if they can email it to you or provide it through their mobile app. Many banks allow you to view account details through their app even if you cannot access a computer.

Frequently Asked Questions

Is my account number the same on every check I write?

Yes. Your account number stays the same for every check from that account. The check number changes with each check, but the account number does not. If you have multiple accounts at the same bank, each account has its own number.

Can someone steal money if they only have my account number?

Not easily. Your account number alone is not enough to access your account or move money. Banks require additional verification—a password, PIN, or signature—before processing transactions. However, you should still keep your account number private and share it only with trusted sources.

What if my check does not have all three numbers printed at the bottom?

All checks issued by U.S. banks must have the routing number, account number, and check number printed in magnetic ink at the bottom. If a check is missing any of these, it may not process correctly. Contact your bank if you receive checks that do not have this information.

Do I need my account number to deposit a check into my own account?

No. When you deposit a check into your own account at an ATM or through mobile deposit, the bank identifies your account through your debit card or login information. You do not need to enter your account number manually.

Will my account number change if I close and reopen an account?

Usually yes. If you close an account and open a new one later, your bank will assign a new account number. Old checks from the closed account will not work. If you need to keep the same account number, ask your bank about reactivating a closed account instead of opening a new one.