Passion. Quality. Professionalism.
“EnDepth is derived from the combination of the words ‘enable’ and ‘depth.’ This name signifies our commitment to providing clients with in-depth, practical, and understandable advice. This concept embodies our professional ethos and motto, guiding us in assisting clients with comprehensive solutions and considerations in all areas.
EnDepth brings together professionals from diverse expertise and practices to create a new boutique firm. We offer an alternative choice for clients seeking high-quality tax, legal, and business consulting services comparable to leading firms (e.g., Big Four firms) but at lower costs and professional fees. Additionally, we are part of the Primarlex: Global Tax Advisors network and the International Fiscal Association (IFA). EnDepth is currently in the process of applying for Business Alliance status under Crowe Global.”
EnDepth Advisory: March 27, 2024

We seek a business opportunity in the market. We position ourselves with an intention to differentiate the market as the alternative choice for the clientele.
EnDepth is an advisory firm providing practical solutions in taxation, legal, accounting, and business consulting matters. It was founded by experts from various consulting firms who came together to create a ‘new alternative choice‘ for clients and the market.
Our partners at EnDepth have extensive experience and expertise in various industries, assisting clients in the market for many years. Our credentials span the entire supply chain, from upstream to downstream, including consumer retail and the restaurant business.
Chusin Suthanmthiti is our legal counsel at EnDepth. He is a seasoned litigator and a highly regarded legal advisor in Thailand, with over 20 years of experience in legal practice. His expertise covers a broad range of legal areas, including civil, criminal, bankruptcy, labor, tax, customs, and administrative litigation, representing both plaintiffs and defendants. He is not only a skilled litigator but also an attentive listener, providing litigation advice from both theoretical and practical perspectives.
Beyond litigation, Chusin offers strategic legal counsel on general legal matters, corporate structures, and compliance. He has extensive experience in drafting, reviewing, and advising on contracts, corporate documents, and other legal instruments, ensuring both legal integrity and business efficiency. Moreover, Chusin also gives highly regarded advice to high-net-worth families, advising on legacy and estate planning, inheritance disputes, and crucial matters related to family law, wills, and family charters.
Chusin earned his law degree from Thammasat University and has been a qualified Thai barrister since 1998 and 2003, respectively. Before joining EnDepth, he built his career at Chayandorn Law Office and trained at Baker & McKenzie, where he honed his litigation and corporate advisory skills.
With a deep understanding of Thai law and a strong track record in dispute resolution, Chusin is a trusted legal expert, dedicated to delivering effective legal solutions for both businesses and individuals.


Auaychai Sukawong is a partner and focus on the tax and legal practice at EnDepth. He is a highly accomplished lawyer with over 25 years’ experience practicing tax and regulatory law, and he has particular expertise in foreign investment, mergers and acquisitions, reorganization, and inbound and outbound transactions.
Auaychai’s practice includes tax structuring for inbound and outbound investment in ASEAN, as well as outbound investment structuring for Southeast Asian companies expanding overseas—especially into China, the European Union, India, Japan, and the United States. He is renowned for his investment structuring planning, tax treaty interpretation, BEPS advisory and implementation work, tax and legal implementation exercises related to business restructuring, reorganization advice in relation to M&A transactions, Initial Public Offering (“IPO”), family business and office planning, and due diligence
In addition to the above, he advises Thailand-based and Thai-listed companies in the energy, petrochemical and refinery, oil and gas, infrastructure, consumer retail, media and entertainment, hospitality, and other sectors on tax and investment structures, including overseas business expansion and acquisition transactions. He also provides ongoing tax advice—including on day-to-day operations—and tax compliance services for various businesses active in Thailand.
Prior to establishing EnDepth, Auaychai worked as a partner and senior advisor in the Bangkok offices of KPMG Thailand and PwC Thailand, respectively for over 12 years. He holds an LLM (adv.) from the International Tax Center of Leiden University as well as LLM and LLB degrees from Thammasat University. Moreover, he is the International Tax Affiliate at ADIT International Tax under supervision of and accredited by the Chartered Institution of Taxation (CIOT) in the United Kingdom. His ADIT qualification includes international tax, transfer pricing, and Singapore tax.
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Throughout the years, we have dedicated ourselves to resolving our clients’ challenges, earning their trust and satisfaction. Our team has provided long-standing service with unwavering commitment. We will continue to walk alongside our clients on their business journey, driven by our passion and determination to deliver the highest level of satisfaction.
Our guiding principle remains:
“Our clients’ satisfaction is our greatest reward.”
If you are interested in our services, please feel free to contact us for consultation at email address: [email protected] or send your details to the contact person below. We are ready and happy to assist you anytime.า
Why Us
- We listen up all your inputs and comments
- We work along with you until we get the answer
- We find the practical solution and recommendation

Our clients include industry leaders, Fortune 500 companies, and innovative startups. While confidentiality prevents us from naming specific organizations, our track record of success reflects the trust these esteemed clients place in us to handle their most complex challenges and opportunities. We’ve worked with some of the well-known business partners.











