Thai Labour Law: Termination Economics and the 400-Day Severance Cap

Thailand's legal-services market sits under the Lawyers Act B.E. 2528 (1985) which reserves Thai-law practice for Thai-bar-admitted lawyers (Lawyers Council of Thailand admission). Foreign lawyers are barred from independent practice of Thai law and from Thai-court appearance in Thai-bar capacity. Foreign law firms operate via Thai-registered subsidiary employing Thai-bar lawyers as the practising entity, with foreign-lawyer staff in advisory and client-facing roles. Big-Four global practices in Bangkok: Baker McKenzie Thailand (largest foreign-affiliated practice, ~150+ lawyers), DLA Piper Thailand, Linklaters Bangkok, Allen & Overy Bangkok (since merged into A&O Shearman), Clifford Chance, Latham & Watkins (smaller). Big-Five Thai-local practices: Tilleke & Gibbins (largest Thai-domestic, ~150+ lawyers), Chandler MHM (Mori Hamada Matsumoto Japanese-affiliation), Weerawong Chinnavat & Partners, Hunton Andrews Kurth Thailand, Watson Farley & Williams Thailand. Mid-tier: SCL Nishimura & Asahi, Anderson Mōri & Tomotsune, Chevy Chase Capital. Practice-area mix: corporate / M&A (largest by revenue), banking / finance, capital markets, dispute resolution, employment, intellectual property, real estate, regulatory. Foreign-lawyer compensation USD 100-300k for mid-level; Thai-bar partner compensation USD 200-700k+. Watch any Lawyers Act revision (rare) and foreign-lawyer-license-pilot discussion.

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Thailand's intellectual-property regime spans Trademark Act B.E. 2534 (1991, revised), Patent Act B.E. 2522 (1979), Copyright Act B.E. 2537 (1994), and Trade Secrets Act 2002. Department of Intellectual Property (DIP) under Ministry of Commerce administers; Central Intellectual Property and International Trade Court (CIPIT) hears IP disputes including trademark infringement, patent disputes, copyright infringement. Thailand joined Madrid Protocol in 2017 streamlining international trademark filing — Madrid filings now cover ~30% of Thai trademark applications. Trademark filing cost: ~USD 1-3k per class for direct DIP filing; Madrid extension USD 3-8k. Enforcement actions: USD 5-30k per trademark for civil-court action plus customs-recordation for border seizure. Counterfeit-economy historic cluster: Patpong night market, Chatuchak Weekend Market, MBK Center, Khao San Road tourist-zone counterfeit-goods (luxury-brand fake handbags, watches, apparel). Enforcement uneven — periodic high-profile raids alongside structurally tolerant day-to-day enforcement. Major IP-enforcement law practices: Tilleke & Gibbins IP team (largest Thai-domestic IP practice; structural Thai-IP-litigation leader), Baker McKenzie Thailand IP, Domnern Somgiat Boonma, Rouse Bangkok, Modern Asia Law. Watch DIP digital-filing transformation and CIPIT case-throughput cycles.

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Thailand's Foreign Business Act (FBA) 1999 is the structural ownership constraint for foreign entrants — caps foreign equity at 49% across service businesses, restaurants, distribution, retail (with some retail liberalisation since 2015). Three List Annexes define restricted sectors. Four operative workarounds: (1) US-Thai Treaty of Amity (1966) grants Americans 100% ownership in most services except specifically-excluded sectors (banking, media, communications); (2) BOI promotion grants business-by-business foreign-ownership exemption for activities on the BOI Investment Promotion list; (3) IBC (International Business Centre) regime, which replaced IHQ and ITC in 2018, provides reduced corporate income tax rates plus 100% foreign ownership for qualifying activities; (4) preferred-share structures inside a 49%-foreign-cap company that allocate disproportionate voting rights or dividend entitlements to the foreign minority. Each path has trade-offs: Treaty is American-only and audit-tested; BOI requires ongoing compliance; IBC requires substantive activities (>=USD 0.5M annual operating expenses); preferred-share structures face challenge under the recent BMW v Coca-Cola foreign-nominee jurisprudence. The structural-investor read: foreign entrants almost always need a hybrid path. Watch BOI Foreign Business Department circulars, MOC FBA enforcement cadence, and tax-court preferred-share rulings as 2026-2028 indicators.

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The 1966 US-Thai Treaty of Amity and Economic Relations is a structural foreign-ownership exception unique to American persons. Grants US-incorporated entities and individuals 100% ownership rights across most Thai service businesses, exempting them from FBA 49% cap. Excluded sectors: banking, fiduciary, telecommunications, transportation, agriculture-land-related, media, exploitation of natural resources. Process: (a) US-incorporated parent or US-citizen shareholder structure; (b) Treaty-of-Amity certification via US Commercial Service Bangkok; (c) DBD registration as Treaty-registered foreign business; (d) ongoing compliance with substantive-American-ownership requirement (typically >50% American shareholding traced through). Typical timeline 30-60 days. Annual maintenance is light vs BOI ongoing reporting. The structural-investor read: Treaty of Amity is the simplest 100% foreign-ownership path for Americans — no business-by-business approval, no operating-expense floor, no ongoing tax-incentive maintenance. Watch any Treaty renegotiation discussion as the structural risk indicator.

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