1. What it covers
| Tax | Focus |
|---|
| VAT | Matching output and input, rates applied, reverse charge on cross-border services, input VAT credits |
| Withholding tax | Correct rates on each payment type, treaty relief on cross-border payments, timely filing |
| Corporate income tax | Book-tax adjustments, deductibility of expenses, loss carry-forward, incentives (including BOI) |
| Related parties and transfer pricing | Identifying related-party transactions, pricing policy and documentation, disclosure risk |
| Other | Spot checks of stamp duty, specific business tax, social security |
2. Deliverables
A Tax Health Check report setting out findings by tax;
A risk list and exposure table ranked high, medium and low;
Remediation recommendations and priorities: what to fix first and how;
A management briefing.
3. How often
| When | Why |
|---|
| Once a year, after the annual audit | Use audited figures to check the year's filings and fix issues in the same year |
| Before M&A or fundraising | Know your tax position so the deal is not discounted or subject to indemnities |
| After changing accounting provider | Find problems left by the previous provider and draw a clear line of responsibility |
| When the Revenue Department sends queries | Check yourself first, then respond |
| Before a BOI exemption period ends | Check use of the exemption and separation of BOI and non-BOI accounts |
4. How it differs from an audit
An annual audit gives an assurance opinion on the financial statements; a tax health check is an advisory risk review focused on tax, based on the information the company provides, and is not an audit opinion. The two work well together.
5. Basis and scope of service
Basis: Thai Revenue Code provisions on VAT, withholding tax and corporate income tax; Sections 71 bis and 71 ter on related-party transactions. The whole review takes about 4–6 weeks depending on the completeness of records and the number of entities.
Related services: Tax Health Check | Transfer Pricing Services
Free download: Compliance Self-Check for Chinese-Invested Companies in Thailand (PDF, 3 pages): 13 checks across six areas, ready to print and tick off.
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