Double Tax Agreement: How to Minimize Withholding Tax (Dividends, Interest, and Royalties)
Thailand’s double tax agreements (DTAs) operate as binding international instruments that mitigate economic double taxation on cross-border income. Although withholding tax is imposed under Thai domestic law, eligible taxpayers may rely on an applicable DTA to obtain reduced rates or exemptions where the treaty provides more favorable treatment.
Under Section 50 of the Thai Revenue Code, outbound payments of dividends, interest, and royalties to non-residents are, as a general rule, subject to withholding tax at the statutory rate. However, where Thailand has concluded a DTA with the recipient’s country of tax residence, the treaty provisions prevail over domestic law to the extent of any inconsistency, in accordance with treaty override principles.
Thai DTAs are largely based on the OECD Model Tax Convention, though withholding tax rates, conditions, and limitations vary by treaty.
The core rule is that business profits of an enterprise are taxable only in the state of residence, unless the enterprise carries on business in the other state through a Permanent Establishment (PE). Where no PE exists, the source state has no taxing rights over such business profits.
Withholding Tax on Dividends, Interest, and Royalties under a Double Tax Agreement
Dividends
Dividends paid by a Thai company to a non-resident shareholder are subject to 10% withholding tax under domestic law. Most Thai DTAs provide reduced withholding tax rates on dividends, typically contingent upon the recipient being a company that holds a minimum shareholding percentage in the Thai distributing company. Access to treaty relief requires that the recipient be both the beneficial owner of the dividends and a tax resident of the treaty partner jurisdiction.
Interest
Interest paid from Thailand to non-residents is likewise subject to 15% withholding tax under domestic law. DTAs generally cap the withholding tax rate on interest at a lower treaty rate. The Thai Revenue Department closely reviews intercompany financing arrangements to ensure that interest payments reflect arm’s length terms and that the underlying transaction constitutes genuine debt rather than disguised equity.
Royalties
Royalties arising from the use of intellectual property, technical know-how, or similar rights in Thailand are subject to 15% withholding tax. DTAs often prescribe reduced withholding tax rates for royalties and may differentiate between categories of royalties, such as industrial, commercial, or technical payments. As with dividends and interest, treaty benefits are available only where the recipient qualifies as the beneficial owner and the payment is not recharacterized under Thai tax law or anti-avoidance principles.
DTAs Reduce Withholding Tax at Source and Provide Foreign Tax Credits
Thailand’s Double Taxation Agreements (DTAs) are intended to prevent the same income from being taxed in more than one country. This is achieved mainly through reduced withholding tax at source and the availability of foreign tax credits.
Under Thai domestic law, payments such as dividends, interest, and royalties made to non-residents are generally subject to withholding tax. DTAs typically limit the maximum withholding tax rate on these payments, often to a level lower than the domestic rate. Where the income recipient is a tax resident of a treaty country and satisfies the treaty conditions, the reduced DTA rate may be applied at the time of payment.
DTAs also eliminate any remaining double taxation through the foreign tax credit method. Under this method, income may be taxed in Thailand in accordance with the DTA, but the recipient’s country of residence must allow a credit for the Thai tax paid against its own tax on the same income. The credit is generally limited to the amount of domestic tax attributable to that income. For business income, taxing rights often depend on whether the income is attributable to a permanent establishment in Thailand.
In summary, Thailand’s DTAs reduce tax exposure by limiting withholding tax at source and preventing double taxation through foreign tax credits, thereby providing certainty and efficiency for cross-border transactions.
