U.S. Tax Threat Forced G7 to Exempt American Firms from Global Minimum Tax

A proposed U.S. retaliatory tax known as Section 899 successfully pressured G7 nations into exempting American-parented companies from controversial provisions of the global minimum tax, according to a May 2025 report published by the Tax Foundation. The threat — which would have raised U.S. withholding and income tax rates on foreign investors and corporations by up to 20 percentage points — was removed from legislation only after the G7 finalized a side-by-side agreement on June 28, 2025. The report describes Section 899 as "the cleanest example of using tax policy threats against allies" to achieve international policy goals, but warns that misinterpreting why it worked could lead policymakers to overuse similar strategies with damaging economic consequences.

The proposed Section 899 would have increased U.S. tax rates on "applicable persons" from countries imposing digital services taxes or the Undertaxed Profits Rule (UTPR) by 5 percentage points annually, starting as early as January 2026. The House version capped the increase at 20 points above statutory rates, while the Senate softened it to 15 points above treaty rates with an effective date of January 2027. Both versions also proposed a "Super BEAT" that would have expanded the base erosion and anti-abuse tax by raising the rate to 12.5 or 14 percent, eliminating the $500 million gross-receipts threshold, and removing exceptions for cost of goods sold and certain service payments. According to the report, Section 899 would have hit inbound investment from countries representing more than 80 percent of the U.S. foreign direct investment stock. In 2024, the U.S. imported $0.84 trillion in services and exported $1.1 trillion, making the services surplus a potential target for retaliation.

The report identifies three competing theories for why Section 899 succeeded. The prevailing view in Washington holds that access to the U.S. financial market proved too valuable for foreign citizens and firms to risk facing increased tax rates, forcing them to lobby their own governments for concessions. A second theory suggests that countries understood the U.S. system had adopted the first global minimum tax in 2017, and the 2020 OECD Blueprint originally envisioned grandfathering American rules — meaning Republicans' demand to return to that logic was technically defensible, even if politically awkward. The report notes a third possibility: that the European Union deliberately asked for more than it could achieve, then accepted maintaining Qualified Domestic Minimum Top-Up Taxes (QDMTTs) as a sufficient compromise, preserving the UTPR as an enforcement tool against non-U.S. firms. The authors write that U.S. policymakers negotiated for American companies to remain subject only to QDMTTs under the side-by-side agreement, while the UTPR continues to exist for enforcing Pillar Two on other multinational corporations.

The report warns that overusing leverage tied to the U.S. financial system and dollar-based infrastructure could motivate allies to seek dependency-reducing alternatives, potentially upsetting the bond market and making U.S. debt unsustainable. The authors argue that "simply having a larger economy is not sufficient to achieve international policy goals in an interdependent world," and that what works to coerce one trading partner may fail with another. They point to the European Union's mixed record with market-access leverage: the Carbon Border Adjustment Mechanism has drawn criticism from the U.S., China, India, and BRICS nations without prompting those countries to adopt equivalent carbon prices, while the EU's blacklist of non-cooperative tax jurisdictions increased the odds of jurisdictions joining OECD talks but produced no evidence of reduced offshore wealth or profit shifting. The report emphasizes that Section 899 succeeded partly because the U.S. demand was clear, manageable, and offered a straightforward path to remove the threat if policy changed — elements not present in European digital services taxes or erratic U.S. tariff strategies.

Before deploying future versions of Section 899, the report recommends policymakers answer whether the tactic produces coercive dynamics distinct from tariffs or sanctions, whether it would work against adversaries rather than allies, and whether the economic costs — including reduced foreign investment, bond market pressure, and damage to the dollar's reserve status — outweigh the benefits. The authors conclude that Section 899 showed "using economic leverage against allies can be successful in changing damaging policies while imposing a relatively low cost to the U.S.," but caution that the challenge ahead is understanding when coercion can succeed, under what conditions, and at what price. The cost of inaction mattered too: without Section 899, the U.S. would have faced double taxation of American firms and allowed foreign governments to extract taxes on U.S. companies' domestic earnings without congressional approval.