Your account number is printed at the bottom of the check, in the middle section between two sets of numbers
Look at the bottom of any check. You will see three groups of numbers separated by vertical lines or symbols that look like colons. The account number is the middle group — usually between 10 and 12 digits long. It belongs only to you and identifies which specific account at your bank the check is drawn from.
The first group of numbers on the left is your bank's routing number (also called a transit number). The last group on the right is the check number itself — just a counter that goes up by one with each check you write. The account number in the middle is what the bank uses to pull money from your account when someone deposits the check you wrote.
You can also find your account number on your bank statement, your debit card, or by logging into your online banking. But the check is the quickest place to look if you have one in front of you right now.
Key Takeaways
- The account number is the middle set of digits at the bottom of a check, usually 10 to 12 digits long.
- It sits between the routing number (on the left) and the check number (on the right).
- Your account number is unique to you and tells the bank which of your accounts to take money from.
- You can find the same account number on your bank statement, debit card, or online banking portal.
Why banks print it on every check
When you write a check and someone deposits it, the bank that receives the deposit needs to know two things: which bank your account is at (the routing number) and which account within that bank (the account number). Without both pieces of information, the bank cannot send the money to the right place.
The check itself is a piece of paper that carries these instructions. The numbers at the bottom are printed in a special machine-readable format called MICR (Magnetic Ink Character Recognition), which allows bank sorting machines to read them quickly without a human having to type them in. That is why the numbers look slightly different from regular printed text — they are designed to be read by machines as well as people.
How to read the three number groups
The layout is always the same on every check, though the numbers themselves are different for each person. Here is what each group means:
| Position | Name | What it does | Typical length |
|---|---|---|---|
| Left | Routing number | Identifies your bank | 9 digits |
| Middle | Account number | Identifies your specific account | 10–12 digits |
| Right | Check number | Identifies this specific check | 4–6 digits |
Some checks also print the account number and routing number in the upper right corner in regular text, which can be easier to read if the bottom numbers are faded or smudged. But the bottom numbers are the official ones that machines read.
When you need to give out your account number
You will need your account number when you set up direct deposit for a paycheck, arrange automatic bill payments, or receive a wire transfer. You may also need it if you are depositing a check remotely using your phone — many banks ask you to enter the account number along with the routing number to confirm the deposit is going to the right place.
Never give out your account number to someone who calls you claiming to be from your bank. Real banks will not ask for your account number over the phone — they already have it in their system. If someone calls asking for it, hang up and call your bank directly using the number on the back of your debit card or on your statement.
What to do if your account number is hard to read
If the numbers at the bottom of your check are faded, smudged, or hard to see, check the upper right corner — most checks print the account number and routing number there in regular text as a backup. You can also look at your bank statement or log into your online banking to find the numbers.
If you are writing a check and cannot read the account number clearly, do not guess. Call your bank or check your statement. A wrong account number means the money goes to the wrong place, and it can take days to sort out.
The difference between your account number and your routing number
These two numbers work together but do different jobs. The routing number is like your bank's address — it tells the banking system which bank to send the money to. Your account number is like your apartment number within that building — it tells the bank which specific account to put the money into.
You need both numbers for any transaction that moves money between banks, such as direct deposit, wire transfers, or setting up automatic payments. If you give only the routing number, the bank will not know which of its thousands of customers should receive the money. If you give only the account number, the bank will not know which bank you are at.
Frequently Asked Questions
Is it safe to write my account number on a check?
Yes. When you write a check, you are intentionally giving the person who receives it permission to see your account number — they need it to deposit the check. The account number alone cannot be used to withdraw money from your account. Your bank also needs your routing number, and even then, most transactions require additional verification.
Can someone use my account number to steal money?
Not easily. Your account number by itself is not enough to withdraw money. A thief would also need your routing number, and most banks require additional steps like a PIN, password, or signature before moving money. Never share your account number with someone you do not trust, but do not panic if it appears on a check you wrote to a legitimate business.
What if I lose a check before I use it?
Contact your bank and ask them to flag that check number as void. This prevents someone from finding it and trying to cash it. Your bank can issue you a new checkbook with different check numbers. You do not need to worry about your account number being compromised — the account number itself does not change.
Where else can I find my account number besides a check?
Your account number appears on your bank statement (usually at the top), your debit card (sometimes on the front, sometimes on the back), and your online banking portal. If you do not have a check handy, any of these sources will show you the same account number.