The Perils of Tax Evasion
The most dangerous words in business? "It'll be fine." The reality of tax non-compliance is far more severe than you imagine.
Official Tax Audits
Intrusive, back-dated investigations with full authority to scrutinize every document you own.
Crippling Fines & Penalties
Financial penalties that can multiply your original tax bill, potentially bankrupting your business.
Criminal Charges
Intentional tax evasion is a criminal offense leading to imprisonment, destroying your future and freedom.
Reputational Ruin
Financial blacklisting, loss of partner confidence, and the potential end of your business journey.
The Rewards of Compliance: Benefits Beyond the Balance Sheet
Build Credibility
Transparent financial statements build trust with partners and financial institutions.
Access to Capital
Streamline your access to loans and funding for business expansion.
Peace of Mind
Operate with confidence, free from the anxiety of retrospective audits.
Support Phuket's Growth
Your taxes are vital for developing local infrastructure and promoting tourism.
4 Simple Steps to Achieve Tax Compliance
Register Your Business
Start right. Choose the appropriate business structure and complete all legal registrations.
Maintain Accurate Books
Consistently record all income and expenses. Keep business and personal finances separate.
File Taxes On Time
Understand and file all tax types (VAT, WHT, PND.51, PND.50) by their deadlines.
Consult an Expert
When in doubt, professional guidance prevents costly errors and maximizes savings.
✨ AI Tax Strategy Quick-Check
Curious about tax savings for your specific business in Phuket? Enter your business type below and our AI assistant will provide a quick overview of potential deductions and key deadlines.
Disclaimer: This is AI-generated general guidance, not official financial advice. Please consult with our experts for a detailed analysis.

Siri Audit Office
Your Trusted Partner in Accounting & Tax
Don't Let Tax Issues Destroy the Business You've Built.
We understand the unique challenges faced by SMEs in Phuket. Let Siri Audit Office manage the complexities of tax, freeing you to focus on what matters most: growing your business with complete peace of mind.
Our Tax Services:
1. Tax Advisory
Advisory for practical application of tax benefits and privileges granted from Government authorities, e.g., B.O.I. privileges. We also assist with company preparation for various cases, e.g., business inspection, tax refund, etc.
2. Monthly Tax Filing
- Withholding Tax (WHT)
- Value Added Tax (VAT)
- Specific Business Tax (SBT)
3. Corporate Income Tax (PND.50) Filing
Corporate income tax must be paid twice per accounting period:
- Half-year Income Tax filing (PND.51)
- Annual Corporate Income Tax filing (PND.50)
4. Tax Refund
We manage and process refunds for:
- Corporate Income Tax
- Value Added Tax (VAT)
- Withholding Tax (WHT)