OECD vs. UN Model Tax Convention
Every bilateral tax treaty is negotiated individually, but nearly all are based on one of two templates: the OECD Model Tax Convention (first published 1963, most recent update 2025) or the UN Model Double Taxation Convention (first published 1980, most recent update 2021).
The fundamental difference: the OECD Model favors residence-country taxation, while the UN Model favors source-country taxation.
Why Two Models Exist
The OECD Model was developed by and for industrialized countries that are primarily capital exporters — countries whose residents invest abroad and receive income from foreign sources. Limiting source-country withholding benefits these countries because it means more of their residents' foreign income comes home untaxed by the source country.
Developing countries objected. As primarily capital importers — countries that receive foreign investment and pay out dividends, interest, and royalties — they wanted to preserve their right to tax income generated within their borders. The UN Model, developed through the UN Committee of Experts on International Cooperation in Tax Matters, gives source countries broader taxing rights.
Key Differences
Royalties (Article 12)
This is the starkest difference between the two models.
| Model | Source-Country Rate |
|---|---|
| OECD Model | 0% — royalties taxable only in the residence state |
| UN Model | Source taxation permitted — rate negotiated bilaterally |
Most actual treaties involving at least one developing country follow the UN approach and allow source-country royalty taxation, typically at 10-15%.
Technical Service Fees (Article 12A)
The UN Model includes Article 12A, which has no OECD equivalent. It allows source countries to tax fees for technical services — management, consultancy, and technical fees paid to non-residents. This matters significantly for developing countries that import expertise.
Under the OECD Model, technical service fees are classified as business profits (Article 7), taxable in the source country only if the service provider has a permanent establishment there. This effectively means most technical service payments flow out untaxed.
India, many African nations, and Southeast Asian countries commonly negotiate technical service fee provisions into their treaties, drawing from the UN Model.
Permanent Establishment (Article 5)
The UN Model sets lower thresholds for creating a PE:
| PE Type | OECD Model | UN Model |
|---|---|---|
| Construction site | 12 months | 6 months |
| Service PE | Not included | 183 days in any 12-month period |
| Insurance PE | Not included | Included |
Dividends (Article 10)
Both models allow source-country withholding on dividends, but with different maximum rates:
| Scenario | OECD Model | UN Model |
|---|---|---|
| Direct investment (25%+ ownership) | 5% | 5% (same) |
| Portfolio dividends | 15% | 15% (same) |
Interest (Article 11)
| Model | Maximum Source Rate |
|---|---|
| OECD Model | 10% |
| UN Model | Negotiated — typically 10-15% |
Impact on Actual Treaties
No treaty follows either model exactly. Negotiations produce hybrid outcomes. A treaty between the US and India might use the OECD framework for dividends but the UN approach for royalties and technical services. The US-India treaty, for example, includes a 10% royalty withholding rate (UN approach) rather than 0% (OECD approach).
Typical Patterns
Developed-Developed (US-UK, France-Germany): Closely follows the OECD Model. Low or zero royalty rates, no service PE, no technical services article. Developed-Developing (US-India, UK-Nigeria): Hybrid. Developing country negotiates higher source-country rights on royalties, may include service PE provisions. Rates higher than OECD Model but lower than domestic statutory rates. Developing-Developing (India-Brazil, Kenya-South Africa): Often follows the UN Model more closely. Higher withholding rates, broader PE definitions, technical service fee provisions.The Multilateral Instrument (MLI)
Since 2019, the OECD's Multilateral Instrument has modified thousands of existing treaties simultaneously. The MLI primarily implements OECD-oriented BEPS changes — but it includes the Principal Purpose Test (PPT), which both OECD and UN Model supporters endorse as a tool against treaty abuse. 104 countries have signed the MLI, including many developing countries that otherwise prefer the UN Model.
Why This Matters
When looking up treaty rates on TaxInPangea, the model basis explains why rates vary so widely between treaty pairs. A 0% royalty rate between two OECD members reflects the OECD Model's residence-country preference. A 15% royalty rate between an OECD member and a developing country reflects the UN Model's source-country emphasis. Neither is "right" — they reflect different economic positions and negotiating outcomes.