Tax Health Check

The Revenue Department (RD) is stepping up tax audits, and Chinese businesses in Thailand commonly face compliance risks across VAT, withholding tax, corporate income tax, related-party transactions and transfer pricing. Z&X performs a comprehensive health check of your historical filings, identifying risks, quantifying exposures and recommending practical remediation, so you can address issues early and reduce the risk of back taxes, surcharges and penalties.

This is a management advisory tax risk review. It does not constitute a statutory audit or assurance opinion, and its findings are based on the information and interviews you provide.

Our locally licensed team reviews each tax in turn:

· Value added tax (VAT): Matching of output and input tax, rate application, cross-border services and self-assessed VAT, and compliance of input tax credits.

· Withholding tax (WHT): Withholding requirements and rates for each type of payment, cross-border withholding and treaty relief, and timeliness of filings.

· Corporate income tax (CIT): Book-to-tax adjustments, deductibility of expenses, loss carryforwards and application of tax incentives.

· Related-party transactions and transfer pricing: Identification of related-party transactions, pricing policies and documentation, and an initial assessment of disclosure risk under Section 71 ter.

· Other taxes: Targeted compliance checks on stamp duty, specific business tax (SBT), social security and more.

For deeper analysis, a dedicated related-party transaction and transfer pricing risk assessment can be added, and the scope can be extended to multiple years or entities.

· Historical compliance review: Companies seeking a systematic review of past filings to uncover issues early.

· Pre-transaction or pre-investment review: Companies needing a clear picture of their own tax position ahead of a transaction or fundraising.

· Under tax authority scrutiny: Companies that have received inquiries from, or are under close attention by, the tax authorities.

· Annual head office review: Chinese companies whose parent requires an annual tax risk assessment of their Thai entities.

· Kick-off and scoping (within 1 week of engagement): Confirm scope, issue a document request list and assemble the project team.

· Information gathering and fieldwork (1–3 weeks after documents are complete): Document review, interviews, on-site work (where required) and data collection.

· Analysis and working papers: Professional analysis and drafting of report working papers.

· Review and finalization (1–2 weeks after first draft): Partner review, independent review and sign-off by an equity partner, and finalization.

· Delivery and Q&A: Formal delivery, walkthrough of findings and follow-up Q&A within the agreed period.

The overall timeline is around 4–6 weeks, depending on document readiness and the number of entities. A Chinese-speaking project manager serves as your single point of contact, with communication and reporting in Chinese throughout.

· Tax Health Check Report: Chinese version, presenting findings by tax type.

· Risk register and exposure quantification: Risks rated high, medium or low, with their impact.

· Remediation recommendations and priorities: Clear guidance on what to fix first and how.

· Management briefing: Presentation of findings and the remediation path to management.

Deliverables are provided in Chinese by default; English or Thai versions can be arranged separately.

The Compliance Self-Check for Chinese-Invested Companies in Thailand covers 13 checks across six areas: shareholding structure, registered address and property, staff and employment, accounts and documents, BOI compliance, and tax filing. Each check comes with clear criteria, so you can see whether you are in the green, yellow or red zone and what to fix first.

Free download: Compliance Self-Check for Chinese-Invested Companies in Thailand (PDF, 3 pages)

Unsure about any item after the self-check? Book a tax health check →

The following services can be combined with this one; see each page for details:

· Transfer Pricing Services: related-party pricing and transfer pricing documentation

· Global Minimum Tax (Pillar Two): effective tax rate calculation and top-up tax filing for Thai entities of large groups

· Can software and systems be tax-exempt? How does Thailand's Notification No. 469 work?

· If our company is on the Revenue Department's review list, does that mean we broke the law?

· What does the Thai Revenue Department usually examine in a tax audit, and how should we respond to a notice?

· What does a tax health check cover, and how often should we do one?

· How should related-party transactions with head office be priced so they are not adjusted by the Revenue Department?

· What are the long‑term compliance issues most easily overlooked by Chinese enterprises investing in Thailand?

· When a Chinese enterprise investing in Thailand pays service fees or technology royalties to its China headquarters, what taxes need to be declared in Thailand?

· Are there significant differences in tax burden for a Chinese-invested company in Thailand when repatriating funds in the form of dividends, service fees and technology royalties?

· Latest Policy from the Revenue Department of Thailand: Incentives for E‑Invoices and E‑Withholding Tax Extended to End‑2027, With Withholding Tax Rates for Thai‑based Enterprises as Low as 1%

Want advice tailored to your company? Book a tax health check consultation →

Z&X tracks Thai tax and regulatory developments and helps Chinese-invested companies check and fix risks. Some of our published content:

· Top 10 Financial and Tax Pain Points for Chinese Enterprises Going Overseas to Thailand and Zhongxin Professional Solutions

· Why do 85% of compliance errors occur in the first 6 months when starting a business in Thailand?

· What are the long‑term compliance issues most easily overlooked by Chinese enterprises investing in Thailand?

· Our licenses and certificates: three licensed firms in China and Thailand

Want to understand your tax risks first? Book a tax health check consultation →

Articles from our Thailand Investment Guide related to this service:

· 2026 Compliance Self-Check for Chinese Companies in Thailand: 10 Checks to Find Your Risk Zone

· The Hidden Costs Many Companies Overlook: A Complete Guide to Thailand's Less Common Taxes

· Thailand Tax Compliance Guide: Key Points and Common Mistakes in Business Document Management

· Tax Information Exchange Violations: Fines of Up to THB 500,000 per Count

View all guide articles →