A MICR account number is a unique number used for setting up and authorizing electronic payments, such as Automated Clearing House (ACH) payments or deposits. It is a 12-digit or 14-digit number assigned to a specific checking account. The MICR number is printed in a specific format and location on the bottom of checks to make it easy for machines to read and process the information. It is not the same as the account number, which is a unique sequence of numbers used to identify each bank account. The MICR number is required for setting up direct deposits and automatic withdrawals from accounts. You can find your MICR number by logging into online or mobile banking and selecting the account for which you would like the MICR information, or by checking the bottom of your checks.