The account number is the second set of digits on the bottom of your check, and it identifies which specific account at your bank the check is drawn from.
On the bottom left of any check, you will see three groups of numbers separated by vertical lines. The first group is your bank's routing number. The second group — usually 10 to 12 digits — is your account number. The third is the check number itself. The account number tells the banking system which of your accounts the money should come out of when someone deposits or cashes the check.
Your account number is unique to that specific account at that specific bank. If you have a checking account and a savings account at the same bank, each has its own account number. The account number stays the same for the life of the account, even if you order new checks. It appears on every check you write from that account.
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.
- The account number identifies which of your accounts the check is drawn from, so the bank knows where to pull the money.
- Your account number is unique to that account and does not change when you order new checks.
- You can find your account number on your bank statement, in your online banking portal, or by calling your bank if you cannot read it on a check.
- Sharing your account number with someone who has a check is generally safe, because they still need the routing number to process a payment.
Why the account number matters when you write a check
When you write a check and hand it to someone, that person deposits or cashes it at their own bank. Their bank reads the routing number to find your bank, then reads the account number to find your specific account. Without the correct account number, the check cannot be processed — the receiving bank will not know which account to pull the money from.
This is why a check with a wrong account number will bounce or be rejected. The routing number gets the check to the right bank, but the account number gets it to the right account within that bank. Both have to be correct for the transaction to go through.
Where to find your account number if you cannot read the check
If the numbers on your check are faded, smudged, or hard to read, you have several ways to find your account number without ordering new checks. Your bank statement — whether you receive it by mail or view it online — displays your account number at the top or in the account details section. Your online banking portal also shows it, usually on the main account page or in account settings.
You can also call your bank's customer service line and provide your name and other identifying information, and they will give you the account number over the phone. Some banks print the account number on your debit card or deposit slips as well.
The difference between account number and routing number
These two numbers work together but do different jobs. Your routing number identifies your bank — it is the same for everyone who banks there. Your account number identifies your specific account at that bank — it is unique to you. Think of the routing number as the address of the bank building and the account number as the address of your specific account inside that building.
When you set up a direct deposit for your paycheck or arrange an automatic bill payment, you provide both numbers. The routing number tells the other institution which bank to send the money to. The account number tells your bank which account to deposit it into. Without both, the transaction cannot be completed.
Is it safe to share your account number on a check
Sharing your account number alone is generally low-risk. Someone who has only your account number cannot withdraw money from your account — they would also need your routing number, and even then they would need authorization to set up a transfer or automatic payment. A check itself is designed to be shared; you hand it to someone specifically so they can deposit or cash it.
However, you should not share your account number with someone you do not trust, and you should never give out both your routing number and account number together unless you are setting up a legitimate transaction like direct deposit or a bill payment. If someone calls claiming to be from your bank and asks for your account number, hang up and call your bank directly using the number on your statement or card — legitimate banks do not ask for account numbers over the phone.
What happens if someone has your account number but not your routing number
If someone has only your account number without your routing number, they cannot process a payment or transfer. They need both pieces of information to tell the banking system where to send money. The account number alone is incomplete — it is like having a street address without knowing which city it is in.
This is why checks are relatively safe to write and distribute. You are giving out both numbers, but you are doing so intentionally and in a format designed for that purpose. The person receiving the check cannot change the routing number or account number on it — they can only deposit or cash it as written.
Frequently Asked Questions
Can someone steal money from my account if they have my account number from a check?
Not without your routing number as well. Even with both numbers, they cannot simply withdraw money — they would need to set up an automatic payment or transfer, which requires additional authorization. If you are concerned about a check you wrote, contact your bank immediately.
Does my account number change if I order new checks?
No. Your account number stays the same for the life of the account. New checks will have the same account number printed on them as your old checks. The only time your account number changes is if you close the account and open a new one.
What if I write a check with the wrong account number by mistake?
The check will bounce or be rejected when the recipient tries to deposit it. Contact the person who received the check and ask them to return it so you can write a new one with the correct account number. If they have already deposited it, call your bank to report the error.
Where is the account number on a check if the print is too small to read?
It is the middle group of numbers on the bottom of the check, between the routing number (on the left) and the check number (on the right). If you cannot read it, check your bank statement or online banking portal instead — both display your account number clearly.
Do I need my account number to set up direct deposit?
Yes. You will need to provide both your routing number and your account number to your employer or the organization sending the direct deposit. Your bank statement or online banking portal has both numbers if you need to look them up.