Tax Planning for Thai Investors

📊 Thai Investor Taxes — Overview

Understanding taxes is crucial because after-tax returns differ significantly from pre-tax returns. Fortunately, Thai law provides tax benefits for retail investors in the securities market.

🇹🇭 Stock Taxes on SET

For retail investors (individuals) on the Stock Exchange of Thailand (SET):

• Capital gains from selling stocks — tax-exempt (under current law)
• Dividends — 10% withholding tax (you can opt to include in annual tax calculation if your rate is below 10%)
• Bond interest — 15% withholding tax

🌍 Foreign Stock Taxes (US Stocks)

Investing in US stocks through a Thai broker involves two tax layers:

• US dividend tax — 30% withholding (default) or 10% (if you file W-8BEN to use the tax treaty)
• Capital gains tax — must be included as income in your Thai tax filing

Important: File W-8BEN with your broker every 3 years — saves up to 20% on dividend tax.

💰 Tax-Deductible Funds

The main tools Thai investors use to reduce taxes:

Combined cap: 500,000 baht/year (RMF + SSF + ThaiESG + PF + pension insurance combined)

₿ Crypto Tax

Crypto tax law in Thailand changes frequently — follow the latest SEC announcements:

• Trading profits — included as income
• Spending crypto on goods — treated as income at conversion
• Mining — treated as income

⚠️ Tip: Keep records of every transaction for accurate tax filing.

🏠 Real Estate Tax

• Specific Business Tax — 3.3% of appraised value (if sold within 5 years)
• Income tax — on profit (sale price − cost basis)
• Transfer fee — 2% of appraised value

📅 Investor Tax Calendar

• Year-round — Buy RMF/SSF monthly (DCA)
• October-December — Check remaining deduction room and top up
• January-March — File taxes (forms ภ.ง.ด.90, 91)
• Every 3 years — Renew W-8BEN with your broker (for US stocks)

Use our Tax Calculator to plan ahead.