Thailand’s Revenue Department is intensifying efforts to collect more than 17.6 billion baht in tax from former prime minister Thaksin Shinawatra after the Supreme Court ruled that the department’s tax assessment was lawful. The ruling makes the tax debt immediately enforceable and opens the possibility of bankruptcy proceedings if the full amount cannot be recovered. Get today's headlines by email Somsak Anantawat, strategic tax collection adviser for the energy business group and acting director-general of the Revenue Department, said the case became final under Supreme Court judgment No 6890/2568, which was read on November 17, 2025. The court confirmed that the assessment issued by tax officials was lawful, leaving Thaksin liable for a total of 17,629,585,191 baht, including tax, penalties and surcharges. According to Somsak, the Revenue Department continued pursuing the outstanding tax throughout the appeals process and court proceedings. Measures already taken include issuing payment notices, examining all categories of assets, preparing for possible seizure and attachment of assets, expanding asset-tracing efforts in Thailand and abroad, and coordinating with relevant agencies to enforce payment. The dispute originated from a personal income tax assessment notice, known as Por Ngor Dor 12, issued on March 28, 2017. Thaksin sought to have the assessment revoked through the Central Tax Court, which ruled on July 18, 2022, that the Revenue Department had failed to issue a summons under Section 19 of the Revenue Code in his capacity as principal. The Specialised Appeal Court’s tax division upheld that ruling on June 2, 2023. However, the Supreme Court later overturned both lower court decisions and ruled in favour of the Revenue Department. According to the judgment summary, the Supreme Court found that Thaksin had concealed his ownership of shares in Shin Corporation Plc by having other individuals, including Panthongtae Shinawatra and Pinthongtha Shinawatra, hold shares on his behalf. The court found that the arrangement lacked tax morality, conflicted with the purpose of tax law, prevented proper tax collection and had no economic purpose beyond securing other benefits, including income tax advantages. The court also concluded that the transaction was carried out for a seriously unlawful purpose and found no grounds to waive or reduce penalties and surcharges. As a result, the Revenue Department was confirmed as having authority to collect the full assessed amount under the March 28, 2017 assessment notice. The Nation reported that if enforcement measures fail to recover the entire debt, the department will consider filing a bankruptcy case against Thaksin. A news report cited Forbes’ 2025 wealth ranking, which estimated Thaksin’s net worth at US$2.1 billion, or about 72 billion baht, placing him 15th in Thailand and 1,688th globally. Join the discussion? Already a member? Adapted by ASEAN Now Nation 7 June 2026
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