Your account number is printed at the bottom left of your check, after the routing number
The bottom of a check contains three groups of numbers separated by colons or special symbols. Reading left to right, you'll see the routing number first (nine digits), then your account number (typically eight to twelve digits), then the check number (three to four digits). Your account number identifies which specific account at your bank the check is drawn from.
The account number is always in the middle group. It's the longest of the three and comes after the routing number. If you're looking at a check from a major U.S. bank, this layout is standard across nearly all checking accounts.
Key Takeaways
- Your account number appears at the bottom of the check in the middle group of numbers, between the routing number and check number.
- Account numbers are typically eight to twelve digits long and are unique to your specific account.
- The order is always routing number, then account number, then check number from left to right.
- If your checks are damaged or you can't read the numbers clearly, your bank can provide your account number by phone or online banking.
- You'll need both your routing number and account number together for direct deposits, wire transfers, and ACH payments.
How the three number groups are arranged
Check printers follow a standard format set by the American Bankers Association. At the bottom of every check, you'll find numbers printed in a special magnetic ink that machines can read. This line is called the MICR line (Magnetic Ink Character Recognition).
The layout is always the same: routing number on the far left, account number in the middle, and check number on the far right. Some checks also print the account number and check number in the top right corner for easy reference, but the MICR line at the bottom is the official location for all three numbers.
The routing number identifies your bank. The account number identifies your account within that bank. The check number is simply the sequential number of that particular check in your checkbook.
What to do if you can't read the numbers clearly
Faded ink, water damage, or worn checks can make the numbers hard to read. If this happens, don't guess—contact your bank directly. You can call the customer service number on the back of your debit card or the number listed on your bank's website.
Your bank can provide your routing number and account number over the phone after verifying your identity. You can also log into your online banking portal; most banks display both numbers in the account settings or on a page labeled "Account Information" or "Direct Deposit Setup." Some banks will also email or mail you a verification letter with these numbers if you need them in writing.
Why you need both numbers together
Your routing number and account number work as a pair. The routing number tells the banking system which bank to send money to. The account number tells that bank which account within their system should receive the money. Without both numbers, a transfer cannot be completed.
You'll need this pair for setting up direct deposit of paychecks or tax refunds, making ACH payments (automatic bill pay), receiving wire transfers, or providing banking information to an employer or government agency. Giving out just one number is not enough for any of these transactions to work.
Differences between personal and business checks
Personal checks and business checks follow the same MICR format at the bottom. The routing number and account number appear in the same positions on both. The main difference is that business checks may have additional information printed on them, such as a business tax ID or company name, but the number layout remains identical.
If you're looking at a check from a business account, the account number is still in the middle group at the bottom. The process for locating it is exactly the same as with a personal check.
Checks from different banks may look different
While the MICR line format is standardized, the overall design and layout of checks varies by bank. Some banks print larger numbers, some use different colors, and some add extra graphics or security features. However, the three number groups at the bottom always appear in the same order: routing number, account number, check number.
If you're unsure whether you're looking at the right numbers on an unfamiliar check, the safest approach is to contact the bank that issued the check. They can confirm which numbers are which and help you verify that you have the correct information before you use it for a transaction.
Frequently Asked Questions
Is my account number the same on every check I have?
Yes. Every check from the same account will have the same account number printed on it. The only number that changes is the check number, which increments with each check in your book. Your routing number also stays the same across all your checks from that bank.
Can I use the account number from an old check?
If the account is still open and active, yes. However, if you've closed that account or switched banks, the account number is no longer valid. Always use the account number from a current check or verify it with your bank before using it for a transaction.
What if my check has a different number of digits than I expected?
Account numbers vary in length depending on the bank. Most are eight to twelve digits, but some banks use different lengths. As long as the number is in the middle group at the bottom of the check (between the routing number and check number), it is your account number. If you're uncertain, contact your bank to confirm.
Do I need to memorize my account number?
No. You can always look it up on a check, in your online banking portal, or by calling your bank. Many people keep a note of it in a safe place or take a photo of a check for reference, but memorizing it is not necessary.