When internal audit is required? 966 viewsMay 4, 2013Auditing 0 Mashburn December 2, 2012 0 Comments Do you know when an internal audit is required? Is there some kind of law that says when a company needs to have an internal audit function and where can I find information for this law? 1 Answer ActiveVotedNewestOldest 0 Andrew211 Posted May 4, 2013 0 Comments I am almost sure it’s required for listed companies in the US (after the SOX act). Register or Login Search for: