Law firmBangkokEnglish · Thai · German
YOUR ONE-STOP COORDINATOR FOR INTEGRATED LEGAL, TAX AND BUSINESS SOLUTIONS
Practice area
Tax Lawyers in Thailand.
Find tax lawyers in Thailand for disputes, audits, planning, and cross-border questions. When you need a lawyer instead of an accountant, and what firms handle.
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Key facts
- When do I need a tax lawyer instead of an accountant?
- When the question is legal rather than clerical: a dispute or assessment, an audit, treaty interpretation, or planning a structure. Accountants handle recording and filing; lawyers handle interpretation and defense.
- Who administers tax in Thailand?
- The Revenue Department administers the Revenue Code, covering personal and corporate income tax, VAT, and withholding. Disputes with its assessments follow formal appeal routes with deadlines.
- When does someone become a Thai tax resident?
- After more than 180 days in Thailand in a calendar year. Residents are taxed on Thai-source income plus foreign-source income brought into Thailand, which is why residency questions reach lawyers so often.
- What do tax lawyers typically charge?
- Hourly billing is common for disputes and audits, with fixed or capped fees for defined planning work. Firms scope the matter first and quote in writing; there is no standard market price.
Find the right firm for your case in Thailand.
Describe your situation once. Justenda staff can share your inquiry with suitable firms after you confirm your email. No account needed.
Featured firms
Featured tax lawyers in Thailand
FRANK Legal & Tax
Free consultation · 15 min
Law firmBangkokEnglish · Thai · German
International boutique law firm in Bangkok and Phuket, providing legal and tax services to investors, businesses, and private clients across Thailand
฿4,000–12,000 / hour
GPS Legal
Consultation from ฿3,125 · 30 min
Law firmBangkokEnglish · Thai · Swedish
Bangkok-based law firm delivering strategic, business-focused legal advice with deep local expertise and a practical, solutions-oriented approach.
฿3,500–15,000 / hour
Find the right firm for your case in Thailand.
Describe your situation once. Justenda staff can share your inquiry with suitable firms after you confirm your email. No account needed.
Tax lawyer or accountant: who do you actually need?
Most tax work in Thailand is done by accountants, and rightly so. Bookkeeping, monthly filings, withholding, and the annual return are compliance work, and an accounting firm handles them as routine. A tax lawyer in Thailand earns their fee when the question stops being how to file and becomes what the law means, or when the Revenue Department is on the other side of the table.
A useful rule of thumb: if the task is recording and reporting what happened, you need an accountant. If the task is interpreting the law, defending a position, or dealing with an assessment, penalty, or investigation, you need a lawyer. Many situations need both, and plenty of Thai firms house both under one roof.
When you need a tax lawyer in Thailand
Four situations account for most engagements.
A dispute with the Revenue Department. Assessments, penalty notices, appeals, and litigation before the tax courts are legal proceedings with deadlines and formal procedure. This is tax dispute work, and it is the clearest case for a lawyer rather than an accountant.
An audit or investigation. When officers ask questions, request documents, or open an examination, how you respond shapes everything that follows. Tax audit defense covers managing that process: what to provide, what positions to take, and how to settle or contest findings.
Planning before a decision. Residency timing, entity structure, incentives, and treaty relief are choices the law gives you, and tax planning is the work of using them lawfully before a move, a company formation, or a large transaction closes.
Cross-border questions. Foreign income, payments to or from a foreign parent, and double tax agreement relief mix Thai law with treaty interpretation. For groups, pricing between related companies adds transfer pricing documentation and defense to the list.
All firms
All tax lawyers in Thailand
Law firmBangkokEnglish · Thai · German
YOUR ONE-STOP COORDINATOR FOR INTEGRATED LEGAL, TAX AND BUSINESS SOLUTIONS
FRANK Legal & Tax
Free consultation · 15 min
Law firmBangkokEnglish · Thai · German
International boutique law firm in Bangkok and Phuket, providing legal and tax services to investors, businesses, and private clients across Thailand
฿4,000–12,000 / hour
GPS Legal
Consultation from ฿3,125 · 30 min
Law firmBangkokEnglish · Thai · Swedish
Bangkok-based law firm delivering strategic, business-focused legal advice with deep local expertise and a practical, solutions-oriented approach.
฿3,500–15,000 / hour
MSC International Law Office
Free consultation · 30 min
Law firmBangkokEnglish · Thai · Chinese (Mandarin) · Cantonese · Russian · German
International Legal and Cross-Border Business Advisory in Thailand and Asia
Blumenthal Richter Sumet & Schuler
Free consultation · 1 hr
Law firmBangkokChinese (Mandarin) · English · German · Thai · Japanese
Blumenthal Richter Sumet & Schuler is a leading law firm in Bangkok, Thailand. We provide legal services in all practice areas.
Bantanai Law Firm
Free consultation · 15 min
Law firmChon BuriEnglish · Arabic · Chinese (Mandarin) · Cantonese · Hindi · FA · Thai · UR
Your trusted legal partner in Thailand
Herrera and Partners Co Ltd
Consultation from ฿10,000 · 1 hr
Law firmBangkokEnglish · Thai · Spanish
Herrera and Partners, is a leading law firm in Bangkok, Thailand. With a dedicated team of skilled and international lawyers in Bangkok.
฿10,000–20,000 / hour
Law firmBangkokEnglish · French · Thai
International firm in Asia since 2006 — corporate legal, accounting, advisory and audit services across Thailand, China & the Philippines.
PACIFIC LAW OFFICE & BUSINESS COMPANY LIMITED
Free consultation · 30 min
Law firmHua HinEnglish · Thai
Thai-English speaking law firm in Hua Hin providing family law, business law, real estate, wills, and immigration services.
Law firmBangkokEnglish · Thai · Spanish
Experts assisting clients in conducting their businesses and protecting their rights and investments in Thailand across a wide range of legal matters.
What Thai tax law actually covers
The core of the field is the Revenue Code, administered by the Revenue Department. Personal income tax turns on residency: spend more than 180 days in Thailand in a calendar year and you are a tax resident, taxed on Thai-source income plus foreign-source income brought into the country. The compliance side of that sits with personal income tax services; the interpretation side, especially for foreign income and treaty relief, is lawyer territory.
On the business side, corporate income tax is levied on juristic companies and partnerships carrying on business in Thailand, alongside VAT, specific business tax, withholding obligations, and stamp duty. Routine computation and filing is corporate income tax work; questions about what is deductible, how a transaction should be characterized, or whether a treaty reduces a withholding rate are where lawyers get involved. Thailand's network of double tax agreements, listed by the Revenue Department, runs through almost every cross-border file.
How to choose between firms
Ask three practical questions. First, does the firm handle your kind of matter: a litigator who appears before the tax courts is a different specialist from a planner who structures inbound investment. Second, who does the work day to day, and in what language: Revenue Department correspondence and proceedings are in Thai, so ask how English summaries are handled if you need them. Third, how are fees set: hourly billing is common for disputes, fixed or capped fees for defined planning work, and a written scope before engagement is standard practice either way.
A fair warning sign in this field is certainty. Tax outcomes depend on facts, documents, and sometimes an officer's judgment, so a firm that guarantees a result is overpromising. What a good firm offers instead is a written view of the position, the risks, and the realistic range of outcomes.
This page is general information, not legal advice. Rules, rates, and procedures change; for a specific situation, speak with a qualified tax lawyer or advisor. The firms below list their languages, locations, and areas of focus.
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Common questions
Frequently asked questions
- What does a tax lawyer in Thailand do?
- Four things cover most of the work: disputing assessments and penalties with the Revenue Department, defending audits and investigations, planning structures and transactions within the law, and advising on cross-border questions such as treaty relief and transfer pricing. The common thread is interpretation and defense rather than bookkeeping, which stays with accountants.
- Can an accountant represent me in a Thai tax dispute?
- Accountants routinely deal with the Revenue Department on filings and can assist during an examination, but formal appeals and litigation before the tax courts are legal proceedings. For a contested assessment, a penalty, or anything heading toward court, a lawyer handles the procedure and argument, often working alongside the accountant who knows the numbers.
- Is foreign income taxed in Thailand?
- For a Thai tax resident, meaning someone who spends more than 180 days in Thailand in a calendar year, the Revenue Department taxes Thai-source income plus foreign-source income brought into Thailand. How that applies to a specific person depends on residency, timing, and any double tax agreement with their home country, which is exactly the kind of question to put to a qualified professional.
- What happens if the Revenue Department audits my company?
- Officers can request documents, ask questions, and examine positions taken in past filings, and the process can end in additional assessments and penalties. How the company responds, what it provides, and which positions it defends shape the outcome, so companies typically involve a lawyer early rather than after an assessment is issued. Appeals against assessments follow formal routes with strict deadlines.
- How much does a tax lawyer cost in Thailand?
- There is no standard price. Disputes and audits are usually billed hourly because their length is unpredictable, while defined planning or advisory work is often quoted as a fixed or capped fee. Serious firms scope the matter first and put the fee basis in writing before starting, so ask for that quote up front.
Sources
- Revenue Departmentrd.go.th/english/6045.html
- Revenue Departmentrd.go.th/english/6044.html
- Revenue Departmentrd.go.th/english/766.html
In this practice area