Bangkok’s legal service providers offer specialized expertise to navigate Thailand’s unique legal landscape. The top firms are distinguished by their ability to handle both complex corporate/business law for multinational companies and highly specialized personal/expat needs like immigration and property transactions.
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Top Tier: Corporate & Litigation Powerhouses
These firms are the preferred choice for large foreign investment, complex regulatory issues, and major commercial disputes.
1. Tilleke & Gibbins
- Expertise: Corporate/M&A, Intellectual Property (IP), and Litigation/Dispute Resolution.
- Reliability: Consistently ranked in the highest tiers by Chambers and The Legal 500 (2025 rankings). Known for its deep bench of specialized Thai and international lawyers, making them the standard for sophisticated business law.
- Best For: Multinational corporations, companies requiring BOI Promotion, or high-stakes commercial litigation.
2. Baker McKenzie
- Expertise: Large-Scale M&A, Tax, and Global Compliance.
- Reliability: Leveraging its vast global network, the Bangkok office handles the most complex cross-border transactions and regulatory issues for major international conglomerates.
- Best For: Companies needing globally integrated legal support and expertise in complex financial and tax structuring.
Specialist Tier: Expat, Visa & Property Solutions
These firms focus on the unique legal requirements of foreign individuals and small-to-medium enterprises (SMEs), offering clarity and efficient processing.
3. Siam Legal International
- Expertise: Personal Immigration (Visas, Work Permits), Property Law, and Family Law.
- Reliability: One of the most visible and established firms dedicated to expat needs, known for transparent, fixed-fee services and multilingual teams.
- Best For: Retirement Visa (O-A), LTR Visa, Marriage Visa applications, and Property Due Diligence (verifying title deeds and ensuring compliance for condominium purchases).
4. Chandler MHM
- Expertise: Project Finance, Energy & Infrastructure, and high-level Regulatory Compliance.
- Reliability: A long-established and top-ranked firm, particularly strong in highly regulated sectors and complex financing deals, providing assurance on major investments.
- Best For: Businesses involved in large-scale infrastructure projects or the energy sector.
5. Kudun and Partners
- Expertise: Mid-Market M&A, Real Estate Development, and Fintech/Start-up Advisory.
- Reliability: A prominent, modern, full-service Thai firm recognized for its dynamic approach and increasing influence in corporate and real estate transactions.
- Best For: SMEs, Fintech companies, and mid-market investors seeking a responsive firm with strong capital markets experience.
Snapshot of Common Expat & SME Service Costs
For personal and business needs, many firms offer fixed professional fees (excluding government fees and VAT) for basic services:
| Legal Service | Typical Professional Fee Range | Note |
| Thai Limited Company Registration | ฿20,000 – ฿40,000 | Excludes government fees (~฿7,000 for 1M capital). |
| Foreign Business License (FBL) | ฿50,000 – ฿100,000+ | Required for foreign-majority companies in restricted sectors. |
| Property Due Diligence (Condo) | ฿15,000 – ฿35,000 | Essential for verifying title deed, liens, and foreign quota. |
| 1-Year Visa Extension (e.g., Retirement) | ฿15,000 – ฿30,000 | Includes consultation and preparation of application documents. |
