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. 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.

A Resounding Victory The last days of October brought some excitement for one of the leading pharmaceutical companies in the world, Novartis, when its patent litigation case in Vietnam against a local generic manufacturer, which had stretched over more than eight years, finally came to an end. The background of this case is quite simple. Novartis was the owner of a patent protecting the active ingredient vildagliptin, which was commercialized through its Galvus® product, a medicine used to treat type 2 diabetes. In 2015, the company found that a drug manufacturer in Vietnam’s Binh Duong province on the outskirts of Ho Chi Minh City was producing a medicinal product containing the vildagliptin active ingredient—an infringement of its patent. Novartis first submitted a request to the Ministry of Science and Technology (MOST) to apply administrative sanctions on this infringer. Subsequently, the MOST Inspectorate concluded in July 2015 that the defendant had committed patent infringement and ordered them to stop producing the infringing drugs and recall them from the market. However, the defendant did not comply with the conclusion, and sought an appeal while it continued to produce the infringing medicine. Realizing that administrative sanctions were not strict enough to deter the defendant, Novartis continued to protect its legitimate rights and interests by initiating a lawsuit at the provincial court where the defendant was headquartered, Binh Duong. Novartis claimed that the defendant had infringed the patent and requesting the defendant to compensate for damages at the highest level allowed by law, pay attorney fees, and publicly apologize to Novartis in specialized newspapers. This began a long journey full of challenges that finally ended with the second appellate judgment declared by the High People’s Court of Ho Chi Minh City on October 17, 2023. The court accepted all claims raised by the

On October 9, 2023, Laos issued Presidential Decree No. 003, which raised excise tax rates for certain goods, effective immediately. The move to increase excise tax rates comes amid the marked depreciation of the Lao kip (LAK). The Lao government is trying to monitor and discourage imports of non-essential products in order to reduce the outflow of foreign currency from the country. Increasing the tax rate for some of these products is part of these efforts. The specific products and excise tax rates are listed in the table below.   This new rate policy is also in line with recent government efforts to encourage avoiding payment in foreign currency to prevent the depletion of foreign currency reserves in Laos. In this regard, commercial banks have already taken action to ration the supply of foreign currency by prioritizing imports of essential goods, such as fuel. The products listed above formalize this impetus to prioritize certain imports and discourage others deemed not essential. In addition, the increased excise tax rates on fuel-powered vehicles show the commitment of the Lao government to move toward electric vehicles, which would also lessen the country’s dependence on fuel imports. For more information on these excise tax changes, or on any aspect of Laos’ international trade regulations, please contact Tilleke & Gibbins at [email protected].

On September 15, Revenue Departmental Order No. Por. 161/2566 was published, fundamentally changing how Thailand tax residents’ offshore-sourced income will be taxed. Under the order, starting from January 1, 2024, the offshore-sourced income of tax residents will be subject to Thai personal income tax (PIT) in any year that it is brought into Thailand. The purpose of this new rule is to ensure consistent tax collection practices among tax officers and to tackle tax avoidance strategies commonly used by individual taxpayers. PIT on Offshore-Sourced Income According to the resident rule in Thailand’s Revenue Code, Thailand tax residents (i.e., persons who reside in Thailand for at least 180 days in a calendar year) are subject to PIT on their domestic-sourced and offshore-sourced income. “Offshore-sourced income” is broadly defined to include income from work, business, or assets outside Thailand. Existing Practice Currently, Thailand tax residents’ offshore-sourced income is exempted from PIT if it is brought into Thailand after the calendar year in which it was earned. This exemption was adopted 28 years ago in the Revenue Department’s interpretation stated in a resolution from February 1985. This exemption by interpretation has led some Thailand tax residents to avoid PIT by simply holding their newly earned offshore-sourced income abroad temporarily and then bringing it into Thailand at a later time. Through the years, a number of tax rulings have affirmed this practice. New PIT Collection Rules for Offshore-Sourced Income Revenue Departmental Order No. Por. 161/2566 simply revokes the favorable exemption adopted under the February 1985 resolution so that the delay tactic is no longer able to succeed in avoiding tax. Starting from January 1, 2024, the offshore-sourced income of Thailand tax residents will be subject to PIT whenever it is brought into Thailand, at which time the offshore-sourced income must be declared to