ABOUT LEGAL SIAM
Welcome to Legal Siam – Your Trusted Corporate & Legal Partner in Thailand
For nearly two decades, our team of legal minds, financial experts, and business consultants has operated under the name Bangkok Business Alliance (BBA). As we expand our services nationwide—from Bangkok to Phuket—we are proud to announce our official rebranding to Legal Siam.
While our business name has evolved to match our national vision, our core foundation remains unchanged. Registered under Bangkok Business Alliance Co., Ltd., Legal Siam continues to be led by high-profile Thai legal experts, including former specialists from the Crime Suppression Division, AMLO (Anti-Money Laundering Office), and ONCB (Office of the Narcotics Control Board).
With 20 years of deeply-rooted expertise in Thai law, corporate compliance, and government liaison, Legal Siam is uniquely positioned to protect your interests and streamline your business setup, accounting, and visa requirements in Thailand.
Our Services
Complete corporate setup, Foreign Business Licenses (FBL), Amity Treaty applications, and BOI investment consulting to launch your business with confidence.
Company & Business Registration
Professional Thai law experts handling contract drafting, corporate compliance, due diligence, and legal protection to secure your commercial interests.
Legal Management & Consulting
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Reliable monthly bookkeeping, corporate tax filing, payroll management, and annual auditing fully compliant with the Thai Revenue Department.
Accounting & Tax Compliance
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Hassle-free legal stay solutions, specializing in Business Visas (Non-B), Work Permits, Marriage Visas, Retirement Visas, and Thailand Elite Visas.
Visa & Work Permit Services
WHY CHOOSE LEGAL SIAM
20+ Years of Expertise
Since 2006, we have helped foreign entrepreneurs, investors, and expats navigate Thailand's legal and business landscape. We know what works — and what to avoid.
One Roof, Six Services
Company, visa, accounting, legal — all handled by one team that communicates internally. No need to coordinate between separate lawyers and accountants.
We have seen regulation changes, crackdowns on nominee structures, and shifts in property law — and we keep our clients protected and compliant.
Transparent Pricing
Clear, fixed-fee quotes before we start any work. No hourly billing surprises. Professional services accessible for SMEs and individuals alike.
Bangkok and Phuket
Whether you're starting a business in the capital or investing in a villa on the island, LegalSiam is on the ground where you need us.
What Our Clients Say
James M. 🇬🇧 British
Company Registration, Phuket
"LegalSiam made our company registration in Phuket completely stress-free. They handled everything and kept us updated throughout the process."
Sophie B. 🇫🇷 French
Accounting & Visa, Bangkok
"We have used LegalSiam for our accounting and work permit renewals for three years. Always reliable, always on time. Highly recommended."
Michael K. 🇩🇪 German
Property Legal, Phuket
“Their legal team reviewed our villa lease and identified issues we would never have caught ourselves. Worth every Penny.”
“At Legal Siam, we see the law as a pathway to opportunity and success for our clients.”
– Sonsunee, Managing Partner – Legal Siam
GET IN TOUCH
For any legal inquiries, consultations, or to discuss your case, please don't hesitate to contact us. We are dedicated to providing the support you need.