Similar to other types of corporate disputes, tax-related conflicts often begin with an earnest attempt to resolve matters outside the courtroom. The prospect of engaging in tax litigation can be daunting, given the potential strain on commercial relationships, the legal expenses, and the uncertainty surrounding its resolution. However, there are instances when tax litigation becomes the sole avenue for seeking redress. For individuals and entities contemplating the pursuit of tax-related legal remedies, the Thai legal system offers an accessible, impartial, and equitable platform for dispute resolution. Tilleke & Gibbins’ latest update to Tax Litigation in Thailand provides an outline for navigating tax-related disputes within the Thai legal framework. It aims to equip readers with a fundamental understanding of procedures and practices within the Thai tax litigation landscape. The full guide is available through the button below.

On November 26, 2025, the government of Vietnam issued Resolution No. 8/2025/NQ-CP to extend and expand the pilot program allowing Vietnamese citizens who meet certain conditions to gamble at three integrated casino resorts in Vietnam: Corona Resorts & Casino Phu Quoc (An Giang Province) – Effective immediately, and continuing an ongoing pilot program that started in 2019. The Grand Casino Ho Tram (Ho Chi Minh City) – New pilot program for five years starting November 26, 2025. Van Don Integrated Casino & Tourism Complex (Quang Ninh Province) – New pilot program for five years from the date the casino receives its license. The pilot program was originally established under Decree No. 03/2017/ND-CP on casino business, which also sets out the specific eligibility conditions for Vietnamese citizens. After the pilot period, these projects must stop allowing Vietnamese players until the government issues further decisions. This expansion of the pilot program comes after Vietnam’s Ministry of Finance (MOF) released a draft decree earlier this year proposing significant changes to the regulatory framework governing casino operations. These revisions, which focus on increasing fiscal contributions from local players and strengthening compliance obligations for casino operators nationwide, are detailed below. Proposed Increase in Casino Entry Fees for Vietnamese Players The draft decree increases the entry fees applicable to Vietnamese citizens permitted to play at casinos. Under the current regulations, Vietnamese players are required to pay an entry fee of VND 1 million (approx. USD 38) for 24 consecutive hours or VND 25 million (approx. USD 950) per month. The draft decree proposes increasing these fees to VND 2.5 million (approx. USD 95) for 24 consecutive hours and VND 50 million (approx. USD 1,900) per month, effectively doubling the existing amounts and marking the first major fee revision since the pilot program allowing Vietnamese players

On November 17, 2025, Thailand’s Ministry of Interior introduced significant regulatory changes to make rooftop solar adoption easier and more cost-effective for property owners. Ministerial Regulation No. 72 B.E. 2568 (2025), issued under the Building Control Act B.E. 2522 (1979), was published in the Government Gazette on November 19, 2025, with immediate effect. Background Under the Building Control Act (BCA), any alteration made to a building requires either notification of the relevant authority or application for a building alteration permit—unless the alteration falls under a separate list of exceptions specified in the ministerial regulations issued under the BCA. In 2015, installation of solar rooftops on any residential building under 160 square meters was added to this list of exceptions, subject to inspection and notification requirements. The newly enacted regulation now eliminates many of these requirements and introduces a broader and more permissive framework to promote solar adoption nationwide. Key Changes Specifically, the regulation introduces three major changes: Expanded exemption from the definition of “building alteration”: The installation of solar panels on any building roof—regardless of the type of building or the total area of the installation—is no longer considered a building alteration under the BCA, provided that the total weight of the installation does not exceed 20 kg/m2. Removal of structural integrity certification requirement: The new regulation eliminates the obligation to obtain a structural stability certificate from a licensed civil engineer. Removal of notification requirement: Property owners or possessors are no longer required to notify the local authority before installation of a solar rooftop. Impact This significant streamlining of requirements for solar rooftop installation is expected to accelerate the adoption of renewable energy in the country, particularly for residential and commercial properties—similar to the way Thailand’s December 2024 removal of licensing requirements for factory solar rooftop installations encouraged such

Interest in data center land acquisition has increased significantly over the past year, with a notable rise in inquiries from investors seeking to establish digital infrastructure in Thailand. Although the sector is still in its early stages, this emerging wave of development represents a significant shift in Thailand’s technology infrastructure landscape, driven primarily by multinational technology companies and operators looking to expand their regional presence. Project Development The data center sector in Thailand is attracting a diverse range of international investors, though with clear geographic patterns. Most investors are from China, Singapore, and Japan, with some additional interest from countries outside Asia, including the United States and Europe. This investor base consists primarily of multinational tech companies and operators seeking to establish new facilities rather than acquire existing assets. Data center business activities are also a sector promoted by Thailand’s Board of Investment (BOI), which offers investors both tax and nontax privileges as well as exemptions to foreign investment and land-ownership restrictions. Projects currently underway are still largely in the land acquisition and construction phase. Unlike more mature markets where many facilities are operational and generating revenue, the predominant focus in Thailand remains on securing suitable land and beginning the building process. This means that while interest is high and land assembly is accelerating, the sector as a whole has not yet reached the operational phase that will ultimately drive licensing applications and full regulatory compliance. The licensing process itself remains at an early stage, as most projects must first complete their facilities before applying for the specific licenses required from the telecommunications authority. Once the facilities are built, the next critical step will be obtaining these telecommunications licenses, which are mandatory for data center operations. Legal and Regulatory Considerations The complexity of data center development in Thailand requires