How long does the IRS audit appeal process take? The process can take several months to over a year, depending on the case’s complexity and the IRS Appeals Office backlog. By Trevor Hannah|2025-02-08T18:07:01+00:00February 8, 2025|IRS Appeals|Comments Off on How long does the IRS audit appeal process take? Share This Story, Choose Your Platform! FacebookXLinkedInEmail About the Author: Trevor Hannah