BrokerTH
Thailand offers two major tax-deductible investment vehicles for retail investors: Retirement Mutual Funds (RMF) and Super Savings Funds (SSF), which replaced the old Long-Term Equity Funds (LTF) after 2019. Both let you reduce your taxable income while building a long-term investment portfolio. Used correctly, they can save you tens of thousands of baht in tax annually.
How the Deductions Work
| Feature | RMF | SSF |
|---|---|---|
| Deduction Limit | 30% of assessable income, max 500,000 THB | 30% of assessable income, max 200,000 THB |
| Holding Period | Until age 55 (minimum 5 years) | 10 years from purchase |
| Annual Investment Required | At least once every other year | No minimum annual requirement |
| Early Redemption Penalty | Tax repayment + 1.5% interest | Tax repayment + 1.5% interest |
| Combined Deduction Limit | Total with pension fund contributions: max 500,000 THB combined | |
Real Tax Savings Example
Assume you earn 1.2 million THB in assessable income and are in the 30% marginal tax bracket. You invest 200,000 THB in RMF and 100,000 THB in SSF — total 300,000 THB. Your taxable income drops from 1,200,000 to 900,000 THB. The tax saving is approximately 300,000 × 30% = 90,000 THB in reduced tax for that year.
Over 10 years of consistent use, the cumulative tax saving from these vehicles can easily exceed 500,000–1,000,000 THB for upper-middle income earners, in addition to the investment returns themselves.
Which Funds to Choose
For RMF: Equity RMFs invest in Thai or global stocks. Index-tracking RMFs (tracking SET50, S&P 500, or global indices) typically have lower management fees (0.3–0.8%) than actively managed funds. Over long periods, low-cost index RMFs have tended to outperform more expensive actively managed ones. Popular options include funds from Kasikorn Asset Management (KASSET), Bualuang Fund, and SCB Asset Management.
For SSF: Same logic applies. SSF linked to S&P 500 or global equity indices provide diversification and historically strong returns. The 10-year holding period makes these genuinely long-term investments, so higher volatility is acceptable since there is time for recovery from downturns.
Practical Steps to Open and Invest
- Open a mutual fund account at your bank or directly with a fund management company (can usually be done via banking app)
- Search for RMF or SSF funds within the account interface
- Choose between equity, bond, or mixed allocation depending on your risk tolerance
- Make your investment before December 31 — contributions after year-end do not qualify for that year’s tax deduction
- Keep your fund statement as documentation for tax filing
Common Mistakes
The most common mistake: investing in December in a rush without comparing fund fees. Spending 30 minutes comparing total expense ratios (TER) across similar index funds can save you 0.5–1% in annual fees, which compounds significantly over a decade.
Second mistake: redeeming early. Many people invest for the tax benefit, then redeem before the required period when they need money. This triggers repayment of all tax savings plus interest. RMF and SSF should only hold money you genuinely do not need for the holding period.
