Trump’s proposed solution to replace the Internal Revenue Service (IRS) with an “External Revenue Service” (ERS) focused on tariff collection fundamentally misunderstands the scale of federal revenue needs. The federal government collected $2.43 trillion in individual income tax revenue in 2024, yet Commerce Secretary Howard Lutnick claims reciprocal tariffs could generate $700 billion annually—a gap that would leave a nearly $1.7 trillion hole in the federal budget. Even with recent dramatic increases in tariff collections, which have climbed more than 300% since Trump’s return to office in 2026, tariffs remain a minor revenue source compared to income taxes. The math doesn’t work, and economists are clear about it.
Tariffs have historically never accounted for more than 2% of total federal revenue, and the U.S. collected only $77 billion in tariffs in 2024. The latest complication: the federal government now faces the prospect of refunding approximately $166 billion in improperly collected tariffs following Supreme Court rulings that struck down many duties. Understanding how revenue is actually collected in America—and why tariffs cannot realistically replace income tax—is critical for anyone affected by proposed changes to the tax system or trade policy.
Table of Contents
- What Is the External Revenue Service and How Would It Replace the IRS?
- The Tariff Revenue Reality: Can $700 Billion Replace $2.43 Trillion in Annual Income Tax?
- How Have Tariff Collections Changed Recently, and What Do Supreme Court Rulings Mean?
- What Would Happen to Taxes, Federal Spending, and Individual Taxpayers if the IRS Were Abolished?
- Why Don’t Economists Think Tariffs Can Replace Income Tax Revenue?
- How Would the IRS’s Current Functions Be Replaced in a Tariff-Based System?
- What’s the Outlook for Federal Revenue Policy if IRS Abolition Doesn’t Happen?
- Conclusion
- Frequently Asked Questions
What Is the External Revenue Service and How Would It Replace the IRS?
The proposed External Revenue Service is a conceptual agency designed specifically to collect revenue from tariffs and import duties rather than from individual and corporate income. The stated goal is ambitious: eliminate the IRS entirely and shift the federal government’s primary revenue mechanism from taxing Americans’ wages and business income to taxing goods entering the United States. On its face, this would fundamentally restructure how the federal government funds itself—shifting the tax burden from individual taxpayers to consumers purchasing imported goods. However, the proposal faces an immediate structural problem.
The IRS collects income taxes through a complex system of wage withholding, quarterly estimated payments, and annual filings that have evolved over decades. The agency employs tens of thousands of people and maintains detailed records on hundreds of millions of taxpayers. An ERS designed only to collect tariffs would lack the administrative infrastructure, legal authority, and technical systems required to replace this function. Even if tariff revenue increased dramatically, it would be insufficient on its own to fund federal operations. This isn’t a simple rebranding—it would require eliminating a primary source of federal revenue with no proportional replacement ready to function.
The Tariff Revenue Reality: Can $700 Billion Replace $2.43 Trillion in Annual Income Tax?
The numbers reveal the fundamental flaw in the proposal. Lutnick’s projection of $700 billion in annual tariff revenue, even if achieved, would cover less than 29% of what the federal government currently collects from income taxes. The remaining $1.7+ trillion would need to come from somewhere, and no alternative revenue source has been identified at comparable scale. Economists like Kimberly Clausing have stated clearly that tariff revenue from major trading partners “wouldn’t even be close” to replacing income tax revenue, let alone covering the full scope of federal spending. This gap becomes even more apparent when you consider historical context. In 2024, the U.S.
collected $77 billion in tariffs—less than 3.2% of total federal income tax revenue. To reach $700 billion annually would require tariffs to increase by more than 900% and remain at that elevated level indefinitely. While tariff collections have indeed climbed more than 300% since Trump’s return to office, they started from a historically low base. A brief surge in collections is not evidence of sustainable revenue replacement. The federal government would need tariff rates so high that they could trigger economic recession, reduce import volumes, and ultimately undermine the revenue base itself.
How Have Tariff Collections Changed Recently, and What Do Supreme Court Rulings Mean?
The trump administration’s aggressive tariff strategy has produced visible results in the short term. Since Trump returned to office, tariff collections have climbed more than 300%—a dramatic increase from historical norms. This spike has been driven by higher tariff rates on Chinese goods, new reciprocal tariff proposals, and broader trade policy changes. For those watching the administration’s policy in action, this seems to validate the idea that tariffs can be a major revenue source.
The numbers are genuinely larger than they were in 2024. Yet this optimistic picture crumbles when confronted with recent Supreme Court decisions. The federal government is now preparing to refund approximately $166 billion in improperly collected tariffs after court rulings struck down many of the duties. This massive refund obligation—larger than the entire 2024 tariff collection—exposes a critical vulnerability: tariff revenue depends on tariffs remaining legally valid. Many of the duties Trump imposed have been challenged and invalidated in federal court, suggesting that tariff revenue projections based on current policies may be unsustainable. What looks like a 300% increase in collections could become a massive refund liability, not a permanent revenue source.
What Would Happen to Taxes, Federal Spending, and Individual Taxpayers if the IRS Were Abolished?
Abolishing the IRS would create an immediate and severe fiscal crisis. The federal government would lose access to nearly $2.5 trillion in annual income tax revenue while simultaneously taking on the legal obligation to refund $166 billion in improperly collected tariffs. This isn’t a gradual transition—it’s a structural collapse of federal revenue. Congress would face an immediate choice: drastically cut federal spending, adopt alternative tax systems, or both.
For individual taxpayers, the proposal masks a fundamental reality: someone must pay for federal government operations. If income taxes are eliminated and tariffs remain insufficient, the federal government would likely need to introduce alternative taxation methods, increase borrowing costs, or sharply reduce spending on programs like Social Security, Medicare, veterans benefits, and defense. The burden wouldn’t disappear—it would be redistributed, likely toward consumption taxes or tariff-driven price increases on consumer goods. For lower-income Americans, who spend a larger percentage of their earnings on imported goods like clothing, electronics, and groceries, a shift to tariff-based revenue would likely increase the tax burden relative to current income tax systems.
Why Don’t Economists Think Tariffs Can Replace Income Tax Revenue?
Economists from across the political spectrum have identified three fundamental barriers to tariff-based revenue replacement. First, the revenue base is too small. Global trade volumes, while large in absolute terms, represent a fraction of the U.S. economy. Even with tariffs set at confiscatory levels, the revenue generated cannot approach the $2.43 trillion collected annually from income taxes. Kimberly Clausing’s observation that tariff revenue from major trading partners “wouldn’t even be close” reflects a consensus view in economics.
Second, tariff revenue is economically destructive if set high enough to generate the necessary income. High tariffs reduce imports, which reduces the tariff base—creating a self-defeating cycle. Tariffs also increase consumer prices and trigger retaliatory trade measures from other countries, reducing economic growth and employment. Third, tariffs are economically inefficient ways to raise revenue compared to income taxes. Income taxes can be calibrated by income level and ability to pay; tariffs are blunt instruments that fall equally on all consumers regardless of income. An economy trying to replace income tax with tariffs would likely experience slower growth, lower wages, and reduced employment while still failing to generate adequate revenue.
How Would the IRS’s Current Functions Be Replaced in a Tariff-Based System?
The IRS performs numerous functions beyond simply collecting income taxes. It administers tax credits for low-income families, maintains the earned income tax credit system, processes tax returns that determine eligibility for benefits, and enforces tax law through audits and legal actions. The agency also manages the complex infrastructure of tax withholding from paychecks, which automatically collects roughly 80% of individual income taxes without requiring annual filings from most workers. A hypothetical ERS focused solely on tariff collection would be unable to perform these functions.
Who would administer credits for families struggling with poverty? Who would process returns and determine tax liability? Who would enforce tariff regulations and audit importers for fraud? The proposal essentially abandons these administrative functions without explaining how they would be replaced. Federal benefit programs would lose a critical verification mechanism. Families relying on the earned income tax credit—a program that reduces poverty more effectively than many direct spending programs—would lose access to automatic income verification. The proposal is incomplete not just in revenue terms, but in administrative and programmatic terms.
What’s the Outlook for Federal Revenue Policy if IRS Abolition Doesn’t Happen?
Despite the administration’s stated goal of abolishing the IRS, the practical barriers to replacement make this outcome unlikely. Congress would face enormous pressure to avoid the fiscal cliff that IRS abolition would create. More realistic scenarios involve restructuring the IRS, reducing its enforcement budget, or reforming tax codes rather than eliminating income taxation altogether.
The recent tariff surge of 300% and the $166 billion refund obligation illustrate that tariff policy remains volatile and legally contested. The more probable outcome is that federal revenue policy will continue to rely heavily on income taxes while tariff revenue grows modestly as a supplementary source. Any legitimate shift in federal revenue policy would require either significant expansion of the tax base, new forms of taxation designed specifically to replace income taxes (such as consumption taxes or wealth taxes), or explicit political decisions to reduce federal spending and revenue needs. The External Revenue Service remains more ideological concept than workable policy at present.
Conclusion
Trump’s proposal to replace the IRS with a tariff-based External Revenue Service faces a mathematics problem that cannot be solved through policy adjustments or administrative creativity. The federal government collects $2.43 trillion annually from income taxes; even optimistic projections put tariff revenue at $700 billion—a gap of $1.7 trillion that no government can simply ignore. Recent tariff collection increases and Supreme Court refund obligations make tariff revenue even less reliable as a primary revenue source.
For consumers, workers, and taxpayers, the proposal highlights a critical distinction between rhetoric and reality in tax policy. Eliminating the IRS doesn’t eliminate the need for federal revenue—it only shifts where that revenue is collected and from whom. Any serious restructuring of federal revenue would require Congress to make explicit decisions about trade policy, taxation levels, spending priorities, and which Americans bear the ultimate tax burden. Until such decisions are made and supported by realistic revenue projections, the ERS remains a proposal with powerful political appeal but minimal practical pathway to implementation.
Frequently Asked Questions
How much would tariff revenue need to increase to replace income tax collection?
Tariffs would need to increase by approximately 900% from 2024 levels and maintain that increase indefinitely. While collections have risen 300% since early 2026, they started from a historically low base of $77 billion. To reach $700 billion would still fall $1.7 trillion short of income tax revenues.
What happens to federal spending if the IRS is abolished?
Without either tariff revenue reaching unprecedented levels or alternative revenue sources, federal spending would need to be cut by roughly 40% immediately, or the federal government would need to dramatically increase borrowing costs. This would affect Social Security, Medicare, defense, veterans benefits, and all other federal programs.
Why would consumers be affected by a shift to tariff-based revenue?
Tariffs are paid by importers and ultimately passed to consumers as higher prices on imported goods. Lower-income families spend a larger percentage of their income on imported clothing, electronics, and groceries, making them disproportionately affected by tariff-based revenue systems.
What about the $166 billion in tariff refunds being prepared?
Supreme Court rulings have invalidated many tariffs as improper under current law. The federal government must refund $166 billion in erroneously collected tariffs, which undermines confidence in tariff revenue as a stable, long-term funding source.
Could the IRS be reformed rather than abolished?
Yes, and this is likely the more realistic outcome. Congress could reduce IRS enforcement budgets, simplify tax codes, or restructure the agency without eliminating income taxation entirely. This would maintain revenue stability while potentially addressing specific concerns about IRS operations.
Have other countries successfully replaced income tax with tariffs?
No modern developed economy has attempted to replace income taxation with tariff-based revenue as a primary funding source. Historical examples like 19th-century America, before the income tax existed, relied heavily on tariffs but also had far smaller and less expensive federal governments.