October 01, 2019 01:32 Updated Follow Lobbyist Activity Reports are due two times per year. May 31st and November 30th. http://www.in.gov/ilrc/2448.htm Related articles When is the Registration deadline for Employer and Compensated Lobbyists? Is online filing of Reports and Registration Statements available? What is the penalty for late filing of Activity Report and Registration Statements? What is the fee to register a For-Profit Lobbyist? Where do I go for tax forms?