Candice Horbacz
The conventional wisdom supporting tariffs often posits them as a mechanism to compel foreign entities to bear the cost of market access, thereby shielding domestic industries. However, a closer examination of modern global trade reveals a more intricate reality: a significant portion of tariffs disproportionately impacts American business activity itself, often functioning as a tax on the very production networks they aim to protect. Recent analysis indicates that approximately half of the U.S. tariff base is applied to "related-party trade"—transactions occurring between affiliated firms within the same multinational corporation. This crucial distinction fundamentally alters the calculus of who ultimately pays tariffs and profoundly influences their economic ramifications for U.S. production, manufacturing, and consumer welfare.
The Evolving Landscape of Global Trade and Tariffs
Tariffs, historically, are taxes levied by one country on goods imported from another, typically intended to raise revenue, protect domestic industries from foreign competition, or exert political pressure. The underlying assumption is often that the financial burden of these duties falls primarily on the foreign exporter, making their goods more expensive in the importing country and thus less competitive against domestically produced alternatives. This traditional view, however, struggles to fully account for the complexities of 21st-century global supply chains, which are characterized by intricate cross-border ownership, specialized production stages, and extensive intra-firm trade.
In recent years, particularly during the late 2010s, the United States saw a significant increase in the application of tariffs across various sectors. The administration at the time asserted that these tariffs were designed to rebalance trade relationships, address unfair trade practices, and ensure that foreign companies, rather than American consumers or businesses, would bear the costs. Officials frequently articulated the belief that these measures would bolster American manufacturing and employment by making foreign goods less attractive. This policy stance led to the imposition of duties on a wide array of products, from steel and aluminum to numerous goods imported from specific countries, sparking a robust debate among economists and policymakers about their true economic impact.
Challenging the Conventional Wisdom: Who Really Pays?
Despite the initial claims by policymakers, numerous economic studies have consistently demonstrated that U.S. businesses and consumers have borne a substantial and often disproportionate share of the tariff burden. Research from institutions like the Federal Reserve Bank of New York, the National Bureau of Economic Research, and academic economists has repeatedly concluded that the costs associated with these tariffs were largely absorbed domestically, leading to higher prices for consumers and increased input costs for American companies. While some subsequent analyses have suggested that foreign exporters might bear a larger share than initially estimated in specific instances, the overarching consensus remains that the domestic economy experiences significant negative repercussions.
The nuance introduced by modern production organization—specifically, the prevalence of related-party trade—adds another critical layer to this ongoing debate. It highlights that the simple binary of "foreign exporter pays" versus "domestic importer pays" often collapses within the interconnected web of multinational enterprises.
The Intricacies of Related-Party Trade
Related-party trade refers to transactions between legally distinct but economically affiliated entities within the same multinational company. This encompasses a broad spectrum of activities, including imports from a U.S. parent company’s overseas affiliates or from U.S.-based subsidiaries of foreign-owned parent companies. These intra-firm transactions are not merely accounting artifacts; they represent strategic decisions by global corporations to optimize efficiency, leverage specialized labor, access critical raw materials, or position themselves closer to key suppliers and customer markets.
For example, a U.S. automotive manufacturer might import specialized engine components from its own subsidiary plant in Mexico, or a European pharmaceutical giant might ship active pharmaceutical ingredients from its Irish affiliate to its manufacturing facility in New Jersey. In both scenarios, these imports are integral to the U.S. production process, supporting domestic employment, investment, and ultimately, the final products available to American consumers. The notion that such transactions solely benefit "foreign" entities is a simplification that overlooks the deeply integrated nature of these global operations.
Data from the U.S. Census Bureau underscores the pervasive nature of related-party trade. In 2024, approximately 49.5 percent of all U.S. goods imports originated from related parties. This share has remained remarkably stable over the past two decades, fluctuating consistently between 46 and 51 percent since 2005, with slight dips observed during major economic disruptions such as the 2008 recession and the COVID-19 pandemic. This consistency highlights that related-party trade is not an ephemeral trend but a foundational characteristic of the globalized economy, reflecting long-term strategic investments by firms in their international supply chains.
The vast majority of these related-party imports are intermediate and capital goods—components, raw materials, machinery, and equipment—that are essential inputs for U.S. production. They are not typically finished goods competing directly with domestic products, but rather necessary elements that support and enable domestic manufacturing and job creation. When tariffs are imposed on these intermediate goods, they directly raise the cost of production for businesses operating within the United States.
Targeting Intra-Firm Trade: A Deeper Impact
The high proportion of related-party imports significantly complicates the intended effects of tariff policies. Even after accounting for various exemptions, an estimated 45.6 percent of the current U.S. tariff base is applied to imports between affiliated firms. This means that nearly half of the revenue generated by tariffs is effectively collected on transactions that occur within multinational enterprises, rather than solely between independent foreign and domestic companies.
Certain sectors exhibit even higher concentrations of related-party trade, making them particularly vulnerable to these intra-firm tariffs. In the automotive sector, for instance, an astonishing 96.8 percent of total imports are related-party transactions, with 97.1 percent of these subject to current tariffs. Similarly, pharmaceutical imports show an 85.5 percent related-party share, with 84.5 percent of these falling under tariff regulations. Even in sectors like metals, where the overall related-party share is 34.0 percent, the entirety of that share is subject to existing tariffs.
- Table 1. Related-Party Import Share for Goods by Sector and Tariff Applicability (2024)
| Sector | Total Related-Party Trade Share | Related-Party Trade Subject to Current Tariffs Share |
|---|---|---|
| Auto Imports | 96.8% | 97.1% |
| Pharmaceutical Imports | 85.5% | 84.5% |
| Metals Imports | 34.0% | 34.0% |
| All Other Imports | 42.4% | 38.0% |
Source: Census Bureau, "U.S. Goods Trade Imports and Exports by Related-Parties, 2024"; Tax Foundation estimates.
This data illustrates that tariffs, in practice, frequently act as a tax on the global supply chains utilized by U.S.-based businesses, regardless of their ultimate ownership. When a Japanese automaker, for example, operates a plant in the U.S. to assemble vehicles for the North American market—contributing significantly to domestic investment and employment—tariffs on components imported from its foreign affiliates directly increase its operational costs. Such increased costs can incentivize the company to re-evaluate its manufacturing footprint, potentially leading to reduced investment or even a shift away from U.S.-based production, thereby harming American job growth and economic activity despite the foreign origin of the parent company.
Consequences for U.S. Businesses, Consumers, and Competitiveness
The implications of tariffs on related-party trade are far-reaching and predominantly negative for the domestic economy:
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Increased Production Costs: Multinational firms invest heavily in establishing efficient production networks spanning multiple countries, optimizing for factors like specialized labor, proximity to resources, and market access. Tariffs on intra-firm trade disrupt these carefully constructed systems, immediately raising the cost of inputs for U.S. manufacturing and production. These costs cannot be easily absorbed or mitigated without significant operational overhauls.
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Higher Prices for Consumers: When businesses face higher input costs due to tariffs, they are often compelled to pass a portion of these increased expenses onto consumers through higher retail prices. This effectively reduces purchasing power and acts as a hidden tax on American households.
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Reduced Investment and Employment: Elevated production costs and reduced profit margins can deter businesses from making new investments in U.S. facilities, equipment, or research and development. Furthermore, companies may slow down hiring or even reduce their workforce to cut costs, directly impacting domestic job growth.
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Weakened Global Competitiveness: Tariffs on intermediate goods used in U.S. production make the final products more expensive to manufacture. This directly impacts the competitiveness of American-made goods in both domestic and international markets. If U.S. producers face higher input costs, their exported goods must either be sold at a higher price, making them less attractive to foreign buyers, or sold with a reduced profit margin, diminishing the incentive to export. This can lead to a scenario where global supply chains bypass the U.S. altogether to avoid tariff burdens, further isolating American production.
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Policy Uncertainty and Supply Chain Reconfiguration: The frequent adjustments and unpredictable nature of tariff rates, which have changed over 50 times in recent years, create a volatile operating environment for multinational corporations. This policy uncertainty hinders long-term strategic planning, leading businesses to delay or withhold critical investments and hiring decisions. While some firms might attempt to "reshore" or reconfigure their supply chains to reduce tariff exposure, such changes are often costly, time-consuming, and may ultimately result in less efficient, rather than more productive, operations. The need for extensive exemption processes for specific goods, as seen in past tariff implementations, itself implicitly acknowledges the domestic harm that broad-based tariffs can inflict.
A Call for Nuanced Policy-Making
The evidence strongly suggests that the argument for tariffs as a simple tool to tax foreigners is significantly weakened by the realities of modern intra-firm trade. In an economy deeply integrated through multinational corporations, where nearly half of imports are transactions within these firms, tariffs act less as a targeted foreign policy instrument and more as a broad-based tax on the efficiency and competitiveness of U.S.-based production.
Policymakers must acknowledge that firm ownership plays a far more critical role in tariff incidence than traditionally assumed. The distinction between "foreign" and "domestic" becomes blurred when a "foreign" parent company’s U.S. subsidiary is a significant employer and investor in the American economy. Tariffs imposed on imports to such subsidiaries can directly undermine domestic job growth and investment.
Therefore, a more sophisticated and nuanced approach to trade policy is imperative. Rather than employing tariffs as a blunt instrument that can inadvertently penalize American production and consumers, policymakers should prioritize strategies that support the efficient operation of U.S. businesses within global supply chains, foster predictability in trade relations, and enhance, rather than hinder, the nation’s overall economic competitiveness. Understanding the intricate dynamics of related-party trade is not just an academic exercise; it is fundamental to crafting effective trade policies that genuinely serve the interests of the American economy and its workforce.
