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The content on this page is for general educational purposes and does not constitute legal advice. Every legal situation is unique. For matters involving investigation, arrest, litigation, or formal proceedings, consult a qualified legal professional.
Financial
Total: 3-12 months
9 steps
Timeline: Tax Audit Process in Thailand
Step-by-step timeline for the Revenue Department tax audit process in Thailand — from notification through document review to final assessment and appeal.
Updated 2026
Step-by-Step Timeline
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Key Takeaways
- Total process: 3-12 months from notification to final assessment
- Cooperation and timely responses reduce audit duration
- Penalties: 1.5% monthly surcharge + 1-2x fine on tax shortfall
- Tax Court appeal deadline: 30 days from final assessment
- Keep all business records for at least 5 years
Professional Legal Assistance
Need help navigating this legal process? A qualified lawyer can guide you through every step and ensure nothing is missed.
Anglo Siam Legal provides experienced legal services across Thailand for both Thai nationals and foreigners.
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