How the OECD Model Convention Uses Exemption and Credit Methods to Allocate Cross-Border Tax

With the OECD's release of the 2025 Model Tax Convention on Income and on Capital, the global framework governing cross-border revenue allocation has solidified its core mechanisms. The model serves as the template for thousands of bilateral treaties worldwide, dictating how sovereign states divide the taxation of multinational businesses and expatriate workers.[1]

The actual capability of these treaties to prevent a single dollar of income from being taxed twice relies entirely on two specific provisions: Article 23A and Article 23B. While political announcements frequently market double taxation agreements as sweeping taxpayer relief, the mechanical reality is that these articles primarily function as revenue-sharing protocols between governments.[1][6]

The underlying problem is jurisdictional overlap. When a resident of one country earns income in another, both states typically assert taxing rights. The host country claims jurisdiction based on the source of the income, while the home country claims jurisdiction based on the taxpayer's residence. Without a treaty, the taxpayer faces the combined statutory rates of both nations, effectively penalizing cross-border trade.[4]

To resolve this, the OECD model offers the exemption method under Article 23A. Under this approach, the residence state simply ignores the foreign-source income for tax purposes. As the treaty text stipulates, the residence state "shall... exempt such income or capital from tax," effectively surrendering its claim to the host jurisdiction.[1][2]

The exemption method strictly preserves the source state's tax rate, a concept economists call capital import neutrality. If a corporation based in a jurisdiction with a 25 percent corporate rate operates a factory in a country with a 15 percent rate, it pays exactly 15 percent on those foreign profits. The competitive advantage of operating in the lower-tax jurisdiction is fully realized by the taxpayer.[3]

However, capital-exporting governments are often reluctant to surrender that revenue differential. Enter the credit method under Article 23B, which has become the favored mechanism for passive income such as dividends, interest, and royalties, and is utilized broadly by nations like the United States.[1][5]

Under the credit method, the residence state taxes the global income but offers a dollar-for-dollar reduction for taxes paid abroad. The United States Internal Revenue Service notes that "taken as a credit, foreign income taxes reduce your U.S. tax liability," preventing the income from being taxed twice.[5]

The skeptical view of the credit method is that it does not actually protect the taxpayer's bottom line; it merely protects the residence state's tax base. Because the credit is capped at the domestic tax rate, the taxpayer effectively pays whichever statutory rate is higher.[3][6]

If the source state charges 15 percent and the residence state charges 25 percent, the taxpayer pays the 15 percent abroad and remits the remaining 10 percent to their home government. The tax relief marketed by the treaty simply transfers the 10 percent differential from the taxpayer's retained earnings to the residence state's treasury.[3]

Furthermore, the credit method introduces severe compliance friction that the exemption method avoids. Taxpayers must navigate complex limitation formulas to ensure the credit does not offset domestic-source income. The IRS strictly limits the relief to the amount of domestic tax attributable to that specific foreign income, requiring meticulous cross-border accounting.[5]

The 2025 Model Convention maintains this dual-track system, allowing states to choose or combine the methods during bilateral negotiations. Many treaties apply the exemption method to active business profits generated through a permanent establishment, while applying the credit method to passive investment returns.[1][2]

The distinction between Article 23A and Article 23B separates the marketing of tax treaties from their economic execution. While both mechanisms successfully prevent double taxation, only the exemption method allows the taxpayer to capture the benefit of a lower foreign tax rate. The credit method ensures the home government captures the difference.[3][6]