Your account number is printed at the bottom left of the check, after the routing number

The bottom of a check contains three separate numbers printed in a special magnetic ink. Reading from left to right, you see the routing number first (nine digits), then your account number (typically 10 to 12 digits), then the check number (usually three to four digits) on the far right. Your account number is the middle set of digits in this sequence.

The account number identifies which specific account at your bank the check is drawn from. If you have multiple accounts at the same bank, each one has its own account number. This is the number you need when setting up direct deposit, arranging wire transfers, or giving payment instructions to employers or creditors.

The numbers at the bottom are printed in MICR format (Magnetic Ink Character Recognition), which allows bank machines to read them automatically during processing. This is why they look slightly different from the printed numbers elsewhere on the check — they must be machine-readable, not just human-readable.

Key Takeaways

  • Your account number is the middle set of digits at the bottom of the check, between the routing number on the left and the check number on the right.
  • Account numbers are typically 10 to 12 digits long, though the exact length varies by bank.
  • The account number identifies your specific account, so different accounts at the same bank will have different account numbers even though they share the same routing number.
  • You can also find your account number on your bank statement, in your online banking portal, or by calling your bank's customer service line.

Why the order matters when reading the MICR line

The sequence at the bottom of the check always follows the same pattern: routing number, account number, check number. This standardized order exists because it matches the way checks move through the banking system. When a check is deposited, machines read these numbers in this exact sequence to route the payment to the correct bank and the correct account within that bank.

If you are looking at a check and trying to identify which number is which, count the digits. The routing number is always nine digits. Your account number comes next and is longer — usually between 10 and 12 digits depending on your bank. The check number on the far right is typically the shortest, usually three or four digits.

Finding your account number if you do not have a check

You do not need a physical check to find your account number. Your bank statement lists it clearly, usually near the top or in a summary section. If you use online banking, your account number appears in your account settings or account overview page — the exact location varies by bank, but it is typically one click away from your main dashboard.

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

Account numbers versus other numbers on your check

A check contains several different numbers, and it is straightforward to confuse them. The routing number identifies your bank or credit union — all customers at the same institution share the same routing number. Your account number identifies your specific account within that bank. The check number is straightforward a sequential identifier for that individual check, printed in the upper right corner as well as at the bottom.

Some checks also print your account number in the upper right corner near the check number, but the authoritative version for banking purposes is always the one at the bottom in MICR format. If you are providing your account number to someone else, use the one from the bottom of the check or from your bank statement.

What happens when you give someone your account number

When you provide your account number to set up direct deposit or authorize a payment, you are giving that person or organization the ability to deposit money into your account or withdraw money from it, depending on what you authorize. This is why you should only share your account number with trusted sources — your employer, your bank, government agencies processing benefits, or creditors you owe money to.

You do not need to give out your full check. Most organizations only need your routing number and account number, which you can provide verbally or type into a form. You never need to mail or photograph a blank check unless an organization specifically requests it, and even then, consider whether you trust them first.

Account numbers are not the same across banks

If you have accounts at multiple banks, each account has a different account number. The same account number will not exist at two different banks. This is why you must provide both your routing number (which identifies the bank) and your account number (which identifies your specific account at that bank) when setting up transfers or direct deposit.

If you switch banks, your new bank will assign you a new account number. Your old account number becomes inactive once you close the account, so direct deposits or automatic payments set up with the old number will fail. You will need to update any recurring payments with your new routing number and account number.

Frequently Asked Questions

Can someone withdraw money from my account if they only have my account number?

They would need both your routing number and account number to set up a withdrawal. However, they should not have either number unless you gave it to them or they obtained it fraudulently. If you believe someone has your account information without permission, contact your bank when ready to monitor for unauthorized activity.

Is it safe to write my account number on a check?

Your account number is already printed on every check you write, so writing it again serves no purpose. If someone asks you to write it on a check, ask why they need it — most legitimate requests can be handled by straightforward providing the routing and account numbers separately or allowing them to read the numbers from the check itself.

What if the numbers at the bottom of my check are smudged or hard to read?

Contact your bank and request a new checkbook. Banks can also provide your account number and routing number verbally or through your online banking account, so you do not need to rely on a damaged check. Do not attempt to guess or estimate the numbers, as even one digit wrong will cause deposits or transfers to fail or go to the wrong account.

Do I need to memorize my account number?

No. Write it down and store it somewhere find, or keep it in your bank's app or your password manager. You will need it occasionally for direct deposit setup or payment authorization, but you do not need to memorize it. Having it written down is safer than trying to remember it incorrectly.