Bangkok’s leading legal advisors are indispensable partners for foreign companies seeking business, tax, and investment success. The top firms are recognized for their mastery of complex Thai regulatory compliance, sophisticated M&A transaction work, and expertise in leveraging investment incentives.
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Here are the top-rated firms specializing in Corporate, Tax, and Investment matters for 2025:
Tier 1: Corporate & Investment Powerhouses
These firms consistently earn the highest international rankings for major transactions and complex regulatory and tax advice.
1. Baker McKenzie
- Core Expertise: Large-Scale M&A, Banking & Finance, Tax, and Global Compliance.
- Investment Focus: The definitive choice for global conglomerates and major inbound investors, providing seamless, integrated legal and tax strategies across multiple jurisdictions. Highly trusted for sophisticated tax planning and complex corporate structuring.
- Key Advantage: Unmatched resources and a vast global network.
2. Tilleke & Gibbins
- Core Expertise: Corporate/M&A, Foreign Direct Investment (FDI), Intellectual Property (IP), and Regulatory Compliance.
- Investment Focus: A premier regional firm with unparalleled local knowledge, specializing in guiding foreign clients through the Foreign Business Act (FBA) and securing valuable tax and non-tax privileges through the Board of Investment (BOI).
- Key Advantage: Deep history and authority in both Thai law and regional legal practices.
3. A&O Shearman (formerly Allen & Overy)
- Core Expertise: Capital Markets, High-Value M&A, Private Equity, and Project Finance.
- Investment Focus: Renowned for its corporate transactional practice, advising on complex financing deals and leveraging its global platform for regional capital markets and high-value mergers.
- Key Advantage: Elite expertise in financial and capital markets transactions.
Tier 2: Specialized & Growth-Focused Partners
These firms provide high-quality, focused expertise critical for mid-market M&A, tax optimization, and efficient business setup.
4. Chandler MHM
- Core Expertise: Project Finance, Energy & Infrastructure, Corporate Real Estate, and M&A.
- Investment Focus: Highly specialized in providing legal and regulatory advice for large capital projects and structured finance, particularly in the energy and infrastructure sectors.
- Key Advantage: Deep expertise in highly regulated industries and project development.
5. LawAlliance Limited
- Core Expertise: Tax Advisory (Band 1 Specialization), Tax Planning, and Tax Litigation.
- Tax Focus: While smaller than the full-service giants, LawAlliance is consistently recognized as a top specialized tax firm in Thailand, often working alongside other corporate firms to provide technical tax advisory and resolve complex tax disputes.
- Key Advantage: Pure specialization and authority in Thai tax law.
6. Kudun and Partners
- Core Expertise: Mid-Market M&A, Capital Markets, Real Estate, and Fintech/Start-up Advisory.
- Investment Focus: A dynamic, modern independent Thai firm that excels in corporate structuring for SMEs and entrepreneurs seeking growth and funding, with a strong focus on capital markets.
- Key Advantage: Commercially astute and responsive advice for growth-stage companies.
