Direct Tax Laws & International Taxation · Overview of Model Tax Conventions

OECD Model Tax Convention Overview for CA Final International Taxation

Updated 5 October 2026 · Fact-checked

The OECD Model Tax Convention is a template that countries use to draft bilateral tax treaties. It avoids double taxation by dividing taxing rights between the residence state and the source state. To answer a question, identify the income, find the matching article, apply the allocation rule, then check the commentary and the actual treaty.

Understand OECD Model Tax Convention Overview

Two countries can tax the same income. The country where a person lives taxes on residence. The country where the income arises taxes on source. This overlap causes double taxation. A tax treaty settles who taxes what, and how much.

The OECD Model Tax Convention on Income and on Capital is a model text, first published in the 1960s and updated from time to time. It is not a binding law or a treaty. Countries use it as a starting draft when they negotiate a Double Taxation Avoidance Agreement (DTAA). The model generally favours residence-state taxation, which suits capital-exporting, developed countries. It still keeps source-state rights for items such as profits of a permanent establishment and income from immovable property. The UN Model gives source states more taxing rights.

The model is organised in chapters. These cover the scope of the convention (persons covered and taxes covered), definitions, taxation of income, taxation of capital, methods for eliminating double taxation, special provisions, and final provisions. The chapter on taxation of income holds the distributive rules. Each article either gives the right to tax to one state only, or shares it. Dividends and interest are shared, and the source state's tax is capped at a treaty rate. Royalties under OECD Article 12 are taxable only in the residence state.

The main articles to remember: Article 1 (persons covered), Article 3 (general definitions), Article 4 (resident, with tie-breaker rules), Article 5 (permanent establishment), Article 7 (business profits), Article 9 (associated enterprises), Articles 10, 11 and 12 (dividends, interest, royalties), Article 13 (capital gains), Articles 15 to 19 (employment, directors, artistes and sportspersons, pensions, government service), Article 23 (methods for relief: exemption and credit), Article 24 (non-discrimination), Article 25 (mutual agreement procedure) and Article 26 (exchange of information).

The Commentary explains each article. It is not part of the treaty text. Still, it is a key aid in interpretation, and the OECD advises that it be used for this purpose. Courts and tax authorities often refer to it. Its weight depends on the treaty and on whether it was issued before or after the treaty was signed. In India, under the treaty-relief provision of the Income-tax Act, 2025, the assessee may choose to be governed by the treaty or by the Act, whichever is more beneficial to the assessee. Quote the section number only as given in the ICAI study material for the 2025 Act. Remember that the actual treaty text governs, not the model.

Key rules to remember

Nature of the Model: OECD Model = template for bilateral DTAAs; not binding law; The binding text is always the signed treaty between the two countries.
Residence-source allocation: Each distributive article gives: (a) exclusive right to one state, or (b) shared right, with source-state tax capped; Dividends (Article 10) and interest (Article 11) are shared, with a source-state cap that each treaty sets. Royalties under OECD Article 12 are taxable only in the residence state. The UN Model shares royalties.
Relief methods (Article 23): Exemption method or Credit method, applied by the residence state; Under the credit method, relief is usually limited to the tax that the residence state charges on that income.
Role of Commentary: Commentary = interpretive aid, not part of the treaty text; Use it to clarify meaning, but the treaty wording prevails.
Business profits and PE: Business profits taxable in the source state only if there is a PE there, and only to the extent attributable to that PE; This is the core rule of Articles 5 and 7.
Capital gains (Article 13): Source state may tax: gains from immovable property, gains from movable property forming part of a PE, and (with conditions) gains from shares deriving their value mainly from immovable property. Other gains (Article 13(5)): taxable only in the residence state; Do not apply the source-state rule to every gain. Gains on ordinary shares and other movable property are generally taxable only in the residence state. Gains from ships and aircraft in international traffic are taxable in the state of effective management. Check the signed treaty, as many treaties differ.

How to solve OECD Model Tax Convention Overview questions

Use this method for any question on the OECD Model, whether it asks for theory or a case.

1Identify the two countries, the person and the residence of that person. Check the tie-breaker rule if the person may be resident in both.
2Classify the income: business profits, dividend, interest, royalty, capital gain, employment income, or other.
3Match the income to the correct article of the model.
4Apply the allocation rule: exclusive to one state or shared, and note any cap on source-state tax.
5Check preconditions such as a permanent establishment, the days of presence, or beneficial ownership.
6Say how relief will be given: exemption or credit method.
7Refer to the Commentary if the wording is unclear, and remind the reader that the signed treaty prevails.
8State the conclusion in provision-facts-conclusion form.

Quickest way: Classify, allocate, relieve

When to use it: Use this for short MCQs and for case-scenario questions with little time.

Write the income type in the margin.
Recall its article number and its rule: exclusive or shared.
Check one trigger: PE, residence, or duration.
Name the relief method and conclude in one line.

Common mistakes in OECD Model Tax Convention Overview

Treating the OECD Model as a binding law or treaty.
Students see the word 'Convention' and assume it is signed by all countries.
Fix: Write that it is a model text. Only a bilateral DTAA signed by two countries has legal effect.
Saying the Commentary is part of the treaty.
It is printed together with the articles.
Fix: Describe it as an interpretive aid that is persuasive, not binding. The treaty wording prevails.
Mixing up the OECD and UN Models.
Both have similar article numbers and structure.
Fix: Remember that the OECD Model generally favours residence taxation, though it keeps source-state rights for items such as PE profits and immovable property. The UN Model gives source states more taxing rights.
Taxing business profits in the source state without checking for a PE.
Students focus on where the income arises.
Fix: Always test Article 5 first, including a dependent agent PE under Article 5(5). The source state may tax business profits only if a PE exists. Without one, the profits are taxable only in the residence state.
Assuming the model fixes the final rates, or that all three of dividends, interest and royalties carry a source-state cap.
The articles on passive income look alike, and students expect each to allow source-state tax.
Fix: The model text itself sets the maximum rates for the source state: 5% or 15% for dividends in Article 10 and 10% for interest in Article 11. Actual treaties negotiate different rates, so use the rate in the signed treaty. Royalties under OECD Article 12 are taxable only in the residence state, so there is no source-state rate. The UN Model shares royalties.
Forgetting to state the relief method.
Students stop after allocating the taxing right.
Fix: Add a closing line on Article 23: exemption or credit in the residence state.

Worked examples

Example 1

A company resident in Country A has no fixed place of business in Country B. It sells goods to customers in Country B through online orders shipped from A. Country B wants to tax the profits. Based on the OECD Model, can it?

Show the solution

Provision: Under Article 7, the business profits of an enterprise are taxable in its residence state. The other (source) state may tax them only if the enterprise carries on business there through a permanent establishment, and only to the extent attributable to it.
Facts: The company has no fixed place of business in B. The goods are shipped from A. No agent or office in B is mentioned.
Application: Article 5 defines a PE as a fixed place of business through which the business is wholly or partly carried on. It also covers a dependent agent who habitually concludes contracts for the enterprise (Article 5(5)). Neither a fixed place nor a dependent agent exists here, so there is no PE in B.
Conclusion: Without a PE, B cannot tax the profits. They are taxable in A, the residence state, under its domestic law.

Answer: Country B cannot tax the business profits because there is no PE in B, either a fixed place or a dependent agent PE under Article 5(5). The profits are taxable only in Country A, the residence state.

Example 2

A student asks: a treaty between India and Country X follows the OECD Model. A later Commentary update clarifies the meaning of an article. A dispute arises about that article. What is the role of the Commentary?

Show the solution

Provision: The Commentary explains the articles of the model. It is not part of the treaty text.
Facts: The treaty is signed and follows the model. The Commentary was later updated.
Application: The Commentary can guide interpretation as persuasive material. Its weight depends on how closely the treaty follows the model, and the reasoning in a later update is weighed more cautiously. The terms of the treaty and the Vienna Convention rules come first.
Conclusion: The Commentary helps but does not bind. The treaty wording and ordinary interpretation rules decide the matter.

Answer: The Commentary is a persuasive interpretive aid, not binding. The signed treaty text and the rules of treaty interpretation prevail, and later updates are applied with care.

Exam tips

In theory questions, begin with one line: model, not law; bilateral treaty is binding.
Learn the article-to-income map. Case MCQs often hinge on matching income to an article.
For PE-based cases, always test Article 5 (including a dependent agent PE) before applying Article 7.
Write the role of Commentary in two sentences: aid to interpretation, not part of the text.
Link your answer to India's treaty relief rule in the Income-tax Act, 2025: the assessee may choose the treaty or the Act, whichever is more beneficial. Cite the section number only as given in the ICAI study material.
For capital gains, do not say the source state taxes every gain. Name the exceptions (immovable property, PE assets, property-rich shares) and say other gains go to the residence state.

Practice questions from Overview of Model Tax Conventions

OECD Model Tax Convention Overview in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

OECD Model Tax Convention Overview: frequently asked questions

What is the OECD Model Tax Convention?

It is a model text that countries use to draft bilateral tax treaties. It divides taxing rights between the residence and source states. It is not binding unless adopted in a signed treaty.

Is the OECD Commentary binding?

No. It is an interpretive aid and is not part of the treaty text. Courts and tax authorities often consider it, but the treaty wording prevails.

How is the OECD Model different from the UN Model?

The OECD Model generally favours residence-state taxation, while keeping source-state rights for items such as PE profits and immovable property. The UN Model gives more taxing rights to the source state, for example by sharing royalties. Study both together for CA Final questions.

Which articles should I remember for CA Final?

Focus on Articles 4, 5, 7, 9, 10, 11, 12, 13, 23, 25 and 26. These cover residence, PE, business profits, associated enterprises, passive income, capital gains, relief, MAP and exchange of information.