Double Tax Agreements (DTA)
Advisory and analysis on applying double tax agreements to cross-border transactions and income — covering the characterization of income, the determination of tax residence, and permanent establishment (PE) analysis.
Scope and application of double tax agreements
A double tax agreement (DTA) is an international treaty concluded between two States. Its principal purpose is to eliminate or relieve double taxation of the same income or capital for persons or enterprises that are connected with both countries as taxpayers. The agreement sets out clearly each country’s taxing rights and the mechanisms for relieving the burden of double taxation.
Thailand has double tax agreements with a large number of treaty partner countries. However, the fact that an agreement is in force between two countries does not mean that the recipient of income benefits from it automatically. The relevant articles of the agreement must be considered together with the facts of the case in every respect: tax residence, the type of income, the source of the income, and the specific conditions of the article concerned.
Provisions and laws relevant to double tax agreement analysis
Determining whether double tax agreement benefits are available under Thai law requires reference to the provisions of the Revenue Code, the relevant subordinate legislation, and the articles of the particular double tax agreement that applies to the case, read together in full.
Advisory and analysis of the articles of a double tax agreement
Our double tax agreement advisory covers analysis of the treaty articles in three principal dimensions: tax residence, the characterization of income, and permanent establishment (PE). These must be considered together with the facts of the case from every angle before any course of action is settled.
The Certificate of Residence as evidence for claiming treaty benefits
In practice, a claim to double tax agreement benefits must be supported by sufficient evidence. A Certificate of Residence issued by the competent authority of the Contracting State is key evidence confirming that the recipient of the income is a tax resident of that State as the agreement requires.
Note: This page discusses the Certificate of Residence only as evidence supporting a treaty claim. It is not a service page for the procedure of applying for that document itself.
Why a case-by-case analysis of the facts matters before claiming benefits
The articles of a double tax agreement and the facts of each case are equally important in determining the tax outcome. Cases governed by the same article but with different facts can produce significantly different tax results, so the analysis must always consider both together.
Key point: Whether a given condition of the agreement is satisfied in a particular case must be analyzed on the specific facts of that case. The conclusion reached in one case cannot be applied automatically to another.
Risks of claiming double tax agreement benefits incorrectly
Claiming double tax agreement benefits without a thorough analysis of the articles and the facts can give rise to tax risk in many situations, particularly when the assessment official later raises a challenge.
The role of the tax law consultant in double tax agreement matters
A rigorous analysis of double tax agreement benefits calls for an understanding of international tax law, the structure of the transaction, and the facts of the case. The tax law consultant’s role is to support the organization through these processes in a manner that complies with the law.
- Analyzing the treaty articles and the facts of the case. We establish the nature of the transaction, the structure of the income, and the relevant facts before considering how, and on what conditions, the relevant articles of the agreement can be applied.
- Assessing PE, WHT, and income characterization risk. We identify risks relating to permanent establishment, cross-border withholding tax, and a characterization of income that may not be consistent with the treaty articles, so that they can be managed before an issue arises.
- Determining tax residence status and the supporting evidence. We analyze tax residence status under the treaty articles, assess whether the available evidence is sufficient to support the claim, and advise on how to assemble a complete set of documents.
- Supporting submissions to the relevant authorities where necessary. We assist in preparing the information and presenting the facts and the law to the assessment official or other relevant authority where a treaty claim is challenged.
Frequently asked questions
What are the basic conditions for claiming double tax agreement benefits?
Claiming double tax agreement benefits requires several conditions to be considered together: the tax residence status of the recipient of the income as defined in the agreement; the type and source of the income and which article of the agreement it falls under; and the specific conditions laid down in that article. These must also be considered alongside the relevant provisions of domestic law, such as Section 70 of the Revenue Code on withholding tax on income paid to foreign companies, and the Royal Decree Issued under the Revenue Code Governing Exemption from Revenue Taxes (No. 18) B.E. 2505 (1962), which lays down the rules for tax exemption where a double tax agreement exists. This analysis must always be carried out on the facts of each individual case.
How does the permanent establishment (PE) analysis affect the tax burden?
If the business activities of a foreign enterprise in the source country amount to a permanent establishment under the articles of the agreement, the source country may have the right to tax the profits arising from or connected with that permanent establishment, as the agreement provides. Whether a given activity gives rise to a PE must be analyzed under both the relevant treaty articles and the factual nature of the activity in each case, and the answer may significantly affect the tax burden in the source country.
Why must income be characterized before a double tax agreement is applied?
A double tax agreement sets out separate articles and tax rates for each type of income, such as business profits, dividends, interest, royalties, independent personal services, and other income. Each type carries conditions and tax consequences under the agreement that may differ significantly. Correctly characterizing the income according to the legal and economic nature of the transaction is therefore an essential step before determining which article of the agreement applies and what conditions it imposes.
Why is the Certificate of Residence important when claiming treaty benefits?
A Certificate of Residence issued by the competent authority of the Contracting State serves as evidence that the recipient of the income is a tax resident of that State as the agreement requires, which is a basic condition for claiming treaty benefits. An important point is that the certificate must cover the tax year or accounting period for which the benefits are claimed and must correspond to the period in which the income arose in each transaction, in line with the practice relating to the Royal Decree Issued under the Revenue Code Governing Exemption from Revenue Taxes (No. 18) B.E. 2505 (1962) and the relevant treaty articles. However, holding the certificate alone is not sufficient; the other conditions of the treaty articles must be considered in every case. For more on obtaining a Certificate of Residence, see Certificate of Residence (RO Certificate)
What should be done if the assessment official challenges a treaty claim?
When the assessment official challenges a claim to double tax agreement benefits, the facts and the law should be set out systematically, covering the interpretation of the treaty articles, the characterization of the income, and the evidence supporting the claim. If the dispute cannot be resolved at the domestic level, there may be matters to consider under the mechanisms provided by domestic law, the agreement, and the related procedures. The appropriate course depends on the facts and the law of each case. For more on our tax advisory services, see Retained corporate tax advisory (Thai)
Discuss your treaty claim
Applying a double tax agreement requires analysis of both the articles and the specific facts of the case — a preliminary assessment helps set the right direction.
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