Internal Revenue Employees Federal Credit Union (IREFCU) was chartered on February 17, 1940 with nine members and total assets of $65. Today there are 1283 members and total assets of $25 million and growing! In order to become a member of IREFCU, you must be currently employed by the IRS with a post duty inNorth or South Carolina. Additionally, the spouse, parent, child or grandchild of an existing member may join the IREFCU. IRS Retirees who were employed with a post duty in NC or SC; or have retired in NC or SC are also able to join!