Your account number is the second set of digits at the bottom of a check, between the routing number and the check number
The bottom left of any check printed by your bank contains three separate numbers in magnetic ink. Reading left to right, you see the routing number (nine digits), then your account number (typically 10 to 12 digits), then the check number (usually four digits). Your account number identifies which specific account at your bank the check draws from. It is not secret — it appears on every check you write.
The account number is always the middle set of numbers. It does not have dashes or spaces within it on the check itself, though your bank may display it with formatting when you log into online banking. If you have multiple accounts at the same bank, each one has its own account number, and checks from each account will show a different middle number.
Key Takeaways
- Your account number is the middle set of digits at the bottom of a check, positioned between the routing number on the left and the check number on the right.
- Account numbers are typically 10 to 12 digits long and identify your specific account, not your bank.
- The account number appears on every check you have printed, so it is not confidential information.
- If you cannot read the magnetic ink numbers clearly, your bank statement or online banking portal will show your account number.
How to read the three numbers at the bottom of a check
The magnetic ink character recognition (MICR) line at the bottom of a check always follows the same order. The first nine digits are your bank's routing number — this tells the Federal Reserve and other banks where to send the money. The next 10 to 12 digits are your account number. The final four digits are the check number, which you or your bank assigned when the checks were printed.
Some checks print these numbers in a different visual order than they appear in the MICR line. For example, the check number might appear in the top right corner of the check for your reference, even though it is the last number in the magnetic line. Always use the order in the magnetic ink line at the bottom, not the visual layout of the check.
If the magnetic ink is smudged or faded and you cannot read it clearly, do not guess. Contact your bank directly or log into your online banking account, where your account number is always displayed in plain text.
Why you need your account number for refunds and payments
When a refund is being sent to your bank account — whether from the IRS, an insurance company, or a business — you often need to provide your account number along with your routing number. Together, these two numbers form the complete address for your account. The routing number tells the sending bank which bank to use; the account number tells that bank which account within the bank should receive the money.
For tax refunds sent by direct deposit, the IRS requires both numbers. For insurance refunds or business refunds, the company processing the refund will ask for both. Providing only one number will cause the transfer to fail or be delayed.
Finding your account number if you do not have a check
If you do not have checks or cannot read the numbers on them, your account number appears in several other places. Log into your bank's website or mobile app — your account number is usually displayed prominently on the account summary page or in account settings. You can also call your bank's customer service line and ask them to read your account number to you over the phone.
Your monthly bank statement also lists your account number, either at the top of the statement or in the account information section. If you receive paper statements, look for a line that says "Account Number" or "Acct #" followed by the digits. Digital statements show the same information in the same location.
Some banks print the account number on your debit card, though not all do. Check the back or front of your card — if it is there, it will be clearly labeled.
The difference between your account number and your routing number
These two numbers do different jobs. Your routing number identifies your bank — all customers of the same bank share the same routing number. Your account number identifies your specific account within that bank. If you have two checking accounts at the same bank, they share a routing number but have different account numbers.
When you set up direct deposit for a refund, you need both numbers. The routing number tells the sending bank which institution to contact. The account number tells that institution which of its accounts should receive the deposit. Without the account number, the money cannot reach the right place.
What to do if your account number looks wrong or incomplete
Account numbers vary in length depending on your bank — some are 10 digits, others 11 or 12. If your account number looks shorter or longer than you expected, that is normal and does not mean anything is wrong. Different banks use different numbering systems.
If the magnetic ink at the bottom of your check is illegible or missing, do not try to reconstruct the number from memory. Contact your bank and ask them to confirm your account number. This takes a few minutes and prevents you from entering the wrong number when setting up a refund deposit.
If you are entering your account number into an online form and the system rejects it, double-check that you have typed it correctly — no extra spaces, no dashes, just the digits. If it still does not work, call the organization processing the refund and read the number to them directly.
Frequently Asked Questions
Is my account number the same as my debit card number?
No. Your debit card number and account number are different. Your account number identifies your bank account; your debit card number identifies the card itself. Some banks print the account number on the debit card, but they are not the same thing. Always use your account number when a form asks for it, not your card number.
Can someone steal money from my account if they see my account number on a check?
Your account number alone is not enough to steal money. A person would need both your account number and your routing number, plus authorization to initiate a transfer. Checks are designed to be seen by multiple people — the bank, the recipient, postal workers — so the account number is not treated as secret. If you are concerned about fraud, contact your bank.
What if I enter my account number wrong when setting up a refund deposit?
The money will either be rejected and returned to the sender, or it will be deposited into the wrong account. If this happens, contact your bank and the organization that sent the refund immediately. They can often trace the deposit and correct it, but the sooner you report it, the faster it can be fixed.
Do I need to memorize my account number?
No. You can always look it up on your checks, bank statement, or online banking portal. Write it down and keep it in a safe place if you use it frequently, but memorizing it is not necessary.