The United Nations Model Double Taxation Convention between Developed and Developing Countries, in its 2021 edition, is a template that countries use when negotiating bilateral tax treaties, and its defining feature is that it gives the country where income is earned a larger share of taxing rights than the competing OECD Model does. The 2021 update, produced by the 25-member UN Committee of Experts on International Cooperation in Tax Matters, added provisions aimed at digital businesses and tightened rules on cross-border services, royalties, and share sales.1United Nations. United Nations Model Double Taxation Convention between Developed and Developing Countries 2021 Its purpose is to stop the same income from being taxed twice while leaving developing nations with a meaningful piece of the tax base created by activity inside their borders.
Why Source Country Rights Sit at the Center
Every cross-border tax question begins with the same split. Does the country where the taxpayer lives get to tax the income, or does the country where the money was earned? The OECD Model, used mainly among wealthier nations, tends to favor the residence country. The UN Model deliberately tilts the other way, which in practice usually means the developing country hosting the investment or the economic activity.1United Nations. United Nations Model Double Taxation Convention between Developed and Developing Countries 2021
The reasoning: when a multinational earns revenue using a country’s infrastructure, workforce, and consumer market, that country has a legitimate claim to a portion of the tax. Without treaty protections skewed this way, the residence country could capture most of the revenue and leave the source country with little. Nearly every substantive article in the convention reflects that priority.
Permanent Establishment: A Lower Bar Than the OECD
A foreign company generally cannot be taxed on business profits in a country unless it has a permanent establishment there. Article 5 defines what qualifies. A fixed place of business such as an office, factory, or warehouse counts under any model. The UN Model diverges on two situations that come up constantly in practice.
Construction and installation projects create a permanent establishment if they last more than six months. The OECD Model requires twelve. A company could complete a substantial building project in a developing country and owe no local tax under an OECD-style treaty.2United Nations. United Nations Model Double Taxation Convention between Developed and Developing Countries
Service activities trigger a permanent establishment when personnel work in the country for more than 183 days within any twelve-month period on the same or connected projects. The OECD Model has no equivalent rule. The UN provision catches a familiar pattern: foreign consulting firms, engineering teams, and technical advisors spending long stretches in-country while their employer claims no taxable presence.2United Nations. United Nations Model Double Taxation Convention between Developed and Developing Countries
Business Profits and the Force of Attraction
Once a permanent establishment exists, Article 7 governs how much profit the source country can reach. Both models start from the same point: tax only the profits attributable to the establishment itself. The UN Model adds a limited force of attraction rule that changes the practical outcome.
Force of attraction lets the source country also tax profits from similar business activities the same company conducts locally without routing them through the establishment. If a foreign manufacturer has a branch selling industrial equipment in a country and the head office also sells similar equipment directly to local buyers, both streams of profit fall within the source country’s taxing rights.2United Nations. United Nations Model Double Taxation Convention between Developed and Developing Countries This shuts down a common structure in which only the least profitable activities run through the local branch while lucrative direct sales are handled from abroad.
Withholding on Dividends, Interest, and Royalties
Articles 10, 11, and 12 cover the largest categories of cross-border passive income.
For dividends flowing from a local subsidiary to a foreign parent, the source country can impose a withholding tax, and the rate is left entirely to bilateral negotiation. The OECD Model, by contrast, caps source-country rates. Leaving the rate open gives countries room to set numbers that fit their revenue needs.2United Nations. United Nations Model Double Taxation Convention between Developed and Developing Countries
Interest is treated the same way. The source country keeps the right to tax outbound interest, at a rate set in negotiation, and the recipient must be the beneficial owner of the income. That beneficial-owner requirement blocks arrangements in which payments are routed through conduit entities in low-tax jurisdictions purely to grab treaty benefits.2United Nations. United Nations Model Double Taxation Convention between Developed and Developing Countries
Royalties are defined more broadly than in the OECD Model. Article 12 covers payments for copyrights, patents, trademarks, designs, secret formulas, and information related to industrial or scientific experience. It also treats payments for the use of industrial, commercial, or scientific equipment as royalties. The OECD dropped equipment rentals from its royalty definition in 1992, reclassifying them as business profits that usually escape source-country tax when no permanent establishment exists.2United Nations. United Nations Model Double Taxation Convention between Developed and Developing Countries The source country can impose a withholding tax on the gross royalty payment at a negotiated rate.
Fees for Technical Services
Article 12A, added in 2017 and carried into the 2021 edition, closes a gap that neither the royalty rules nor the business-profits rules covered: payments for managerial, technical, or consultancy services. A foreign firm can provide high-value advice remotely, collect substantial fees, and never set foot in the source country, so no permanent establishment forms and no withholding right arises under traditional rules.3United Nations. Revised Commentary on Article 12A – Fees for Technical Services
Article 12A allows the source country to impose a withholding tax on the gross fee regardless of physical presence. It applies when the fees are paid by a resident of the source country or by a nonresident whose local permanent establishment bears the cost. The rate is bilaterally negotiated. If the service provider does have a permanent establishment connected to the services, Article 7’s business-profits rules take priority.3United Nations. Revised Commentary on Article 12A – Fees for Technical Services
Income From Automated Digital Services
The headline addition in the 2021 update is Article 12B, which reaches digital businesses that generate revenue in a country without employees, offices, or servers there. Traditional treaty rules could not touch these profits because there was no permanent establishment to attach tax to.4United Nations. Article 12B of the UN Model Tax Convention, as agreed by the Committee at its 22nd Session
Article 12B defines automated digital services as services delivered over the internet with minimal human involvement from the provider. Nine categories are listed:
- Online advertising targeted to local users
- Sale or licensing of user data collected from local users
- Online search engines
- Online intermediation platforms such as marketplaces
- Social media platforms
- Digital content services including streaming and downloads
- Online gaming
- Cloud computing services
- Standardized online teaching services
The default mechanism is a withholding tax on the gross revenue the digital company earns from users or customers in the source country, at a bilaterally negotiated rate. The commentary suggests 3 to 4 percent as a starting point, though actual treaty rates will vary.1United Nations. United Nations Model Double Taxation Convention between Developed and Developing Countries 2021
The Net Basis Election
Gross-revenue withholding can overtax a low-margin business. Article 12B lets the beneficial owner ask the source country to tax its “qualified profits” at the ordinary domestic rate instead. Qualified profits equal 30 percent of the product of the company’s profitability ratio and its gross annual revenue from automated digital services in that country. Where the company keeps segmental accounts for its digital services business, the segment-level profitability ratio applies; otherwise the company-wide ratio is used.5United Nations. United Nations Model Double Taxation Convention between Developed and Developing Countries 2021
This option matters most when local revenue is large but margins are thin. A 3 or 4 percent tax on gross revenue could exceed the actual profit. The trade-off is administrative: the company must document its profitability ratio, and the source country must verify it.
Capital Gains
Article 13 splits capital gains into categories. Gains from selling immovable property are always taxable in the country where the property sits. Gains from selling business assets of a permanent establishment are taxable where that establishment is located.
For share sales, two rules push source-country rights further than the OECD approach. If shares derive more than 50 percent of their value from immovable property in a country, that country can tax the gain even though the seller never held the property directly. And gains from selling shares of a company resident in the other country are taxable there if the seller held at least a minimum ownership percentage during the 365 days before the sale. That minimum percentage is bilaterally negotiated, so countries can target significant dispositions while leaving routine portfolio trades alone.6United Nations. Committee of Experts on International Cooperation in Tax Matters – Taxation of Capital Gains Gains on any other property are taxable only in the seller’s country of residence.
Information Exchange, Collection Help, and Dispute Resolution
Taxing rights are only as strong as the enforcement tools behind them. Article 26 requires treaty partners to exchange information that is “foreseeably relevant” to administering the convention or enforcing domestic tax law, and the obligation reaches all taxes, not just those the treaty covers. A country cannot refuse a request because it has no domestic need for the information, and it cannot decline because the information sits with a bank, financial institution, or nominee. Trade secrets stay protected, no country has to break its own laws, and everything exchanged must stay confidential and go only to officials handling tax assessment, collection, or enforcement.7United Nations. Revised Article 26 (Exchange of Information) and Revised Commentary
Article 27 goes further, letting countries help each other collect tax debts across borders, covering the underlying tax as well as interest, administrative penalties, and collection costs. This article is optional and appears only where both countries judge their systems compatible enough to handle it.8United Nations. Assistance in the Collection of Taxes (Article 27)
Article 25 handles disputes through a Mutual Agreement Procedure. A taxpayer who believes a treaty partner’s action will produce taxation inconsistent with the convention can present the case to the competent authority in their country of residence within three years of being notified of the disputed tax action.1United Nations. United Nations Model Double Taxation Convention between Developed and Developing Countries 2021 The two competent authorities then negotiate. Any agreement they reach is implemented regardless of domestic time limits that would otherwise bar a refund. If they deadlock, the convention offers arbitration, either mandatory and binding or voluntary by mutual consent. Most developing countries prefer the voluntary version, which preserves sovereignty over how international tax disputes are finally decided.