The cabinet approved in principle a draft royal decree letting companies and partnerships deduct 2x the actual cost of renting space or paying fees for booths, exhibitions and trade shows held in Thailand, valid until 31 December 2027 (2570). Companies must obtain a letter from the event organiser confirming attendance and follow Revenue Department rules still to be issued. A similar scheme ran in 2022 and ended 31 December 2022. If you sell at domestic fairs, budget for these costs now and keep organiser certificates. The draft still needs legal review before taking effect, so confirm the final rules with your accountant.