On June 24, 2025, the Thai Cabinet approved tax incentive measures to promote energy conservation and the use of renewable energy—a major achievement for the Ministry of Energy and especially Permanent Secretary Prasert Sinsukprasert. He first proposed the concept of offering tax deductions for solar panel installations back in 2023, when he served as Director-General of the Department of Alternative Energy Development and Efficiency (DEDE). This initiative, along with the tireless efforts of DEDE officials, aims to reduce energy costs for the public and promote widespread adoption of clean energy.

The timeline for this solar tax deduction initiative began on July 24, 2023, when DEDE submitted a formal request to the Revenue Department to discuss promoting energy-saving equipment through tax policy. On August 8, 2023, a joint meeting between the Director-Generals of DEDE and the Revenue Department resulted in an agreement to support rooftop solar installations through tax measures.

Now, on June 24, 2025, the Cabinet has officially approved two key tax measures:

  1. Investment Incentives for Energy Efficiency: Businesses can claim 1.5 times the actual cost as deductible expenses for purchasing or upgrading machinery, equipment, or materials that improve energy efficiency.
  2. Tax Deduction for Residential Solar Rooftops: Individuals can deduct the actual cost of solar rooftop installation on their homes from personal income tax, up to a maximum of 200,000 baht (including VAT).

These measures are designed to support Thailand’s transition to clean energy while easing the financial burden on both businesses and households.