Thai Tax Services
Personal and corporate tax planning, filing, and Revenue Department representation. Optimise legally, file on time.
Thailand operates a progressive personal income tax system (0–35%) and a flat 20% corporate tax (with SME relief). We help individuals and businesses understand their obligations, claim legitimate deductions, and respond to Revenue Department audits.
Available packages
Personal Income Tax (PND.90/91)
Annual personal tax return for Thai residents and non-residents earning Thai-sourced income.
Corporate Income Tax (PND.50/51)
Half-year and annual corporate tax returns with deduction optimisation.
Tax Planning & Advisory
Strategic advice on income structuring, deductions, double-tax treaties and remitted income rules.
Revenue Department Audit Support
Representation and documentation support during Revenue Department audits and disputes.
Requirements
- Tax ID number (we can register if needed)
- Records of all income (Thai and foreign-sourced, if remitted)
- Receipts for deductible expenses (insurance, RMF, SSF, donations)
- Withholding tax certificates received during the year
- For corporates: audited financial statements
Document checklist
- 1Tax ID card / passport
- 2Income statements and pay slips
- 3Withholding tax certificates (50 Bis)
- 4Life and health insurance premium receipts
- 5Pension and provident fund statements
- 6Donation receipts
- 7Mortgage interest statements
Our process
- 1
Tax review
We review your income sources, residency status, and applicable deductions.
- 2
Calculation & optimisation
We calculate liability and identify legitimate deductions to minimise tax.
- 3
Filing
We file your return online via the Revenue Department portal before the deadline.
- 4
Payment or refund
We arrange payment or follow up on any refund due.
Frequently asked questions
Am I a Thai tax resident?
You are a Thai tax resident if you stay in Thailand for 180 days or more in a calendar year. Residents are taxed on Thai-sourced income and on foreign income remitted to Thailand.
When is the Thai tax filing deadline?
Personal income tax returns (PND.90/91) are due by 31 March for the previous tax year. Online filing extends this to 8 April. Corporate returns are due within 150 days of fiscal year-end.
What is the SME corporate tax rate?
SMEs with paid-up capital under 5 million THB and revenue under 30 million THB enjoy a reduced rate: 0% on the first 300,000 THB, 15% up to 3 million, and 20% above.
Do I pay tax on overseas income?
From 2024, Thai tax residents are taxed on foreign income remitted into Thailand in the same year it is earned. We help structure remittances tax-efficiently within the rules.
Ready to start your tax services?
Visit our office on Siam Country Club Road, call us, or send a quick enquiry. We typically reply within 12–24 hours.
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