Does Thailand have a capital gains tax?

Thailand has no separate capital gains tax regime. Instead, capital gains are folded into the personal income tax system, with major exceptions. Gains from selling shares listed on the Stock Exchange of Thailand through a licensed broker are fully exempt for individuals, which is a significant carve-out.

Are listed share gains really tax-free?

Yes. For individuals, capital gains on securities listed on the Stock Exchange of Thailand and sold via a member broker are exempt from personal income tax. This exemption does not extend to unlisted shares or to foreign shares, and companies are taxed differently. A separate financial transaction tax may apply to some trades.

How are property gains taxed?

Gains on selling real property are taxed as personal income at progressive rates, but the mechanism runs through a withholding tax at the Land Office calculated on the appraised value with an ownership-year deduction. The amount withheld can be treated as final or reconciled in your annual return depending on whether the sale was a business activity.

What about unlisted or foreign shares?

Capital gains on unlisted Thai shares and on foreign shares are generally taxable as assessable income at progressive personal rates from 0 up to 35 percent. Gains realised abroad may be taxed when remitted to Thailand under the remittance rules, which changed recently — check current guidance for foreign-sourced income timing.

Is this calculator exact?

No. Thailand's treatment of gains is fragmented across asset types and frequently revised, and property uses a special withholding formula rather than a clean gain-times-rate calculation. Treat the figures as an estimate and confirm with a Thai tax adviser before filing or completing a sale.

Thailand Capital Gains Tax Calculator

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Thailand has no stand-alone capital gains tax — gains flow through the personal income tax system, with a major exemption for listed shares. This calculator picks the right treatment for your asset type and estimates the tax due, whether that is zero, a withholding, or a progressive income-tax charge.

How it works

The treatment depends entirely on what you sold:

listed SET shares (individual)  → exempt, tax = 0
unlisted / foreign shares       → gain added to income, progressive 0–35%
property                        → gain taxed as income (progressive),
                                   shown here as gain × marginal estimate

For shares the gain is simply proceeds − cost. Listed-share gains are zeroed out by the exemption. Unlisted-share and property gains are added to your other annual income and taxed at Thailand’s progressive personal rates, so the marginal rate depends on your total income for the year.

Example and tips

Selling SET-listed shares for a 500,000 baht gain through a Thai broker produces zero capital gains tax for an individual — the exemption is the single most valuable feature of the Thai system for retail investors. The same gain on unlisted shares, stacked on top of a 600,000 baht salary, is taxed at progressive rates and can cost a meaningful share. Keep brokerage contract notes to prove the listed-share exemption, and remember that foreign-sourced gains can be taxed when remitted to Thailand.