The High Cost of Carveouts: Why Tax Foundation Warns Against Making Temporary "No Tax On" Cuts Permanent

WASHINGTON — As policymakers look toward the expiration of major tax provisions at the end of the decade, a newly released modeling report from the Tax Foundation casts a critical eye on a popular suite of targeted tax breaks. The publication, titled Options for Reforming America’s Tax Code 3.0: A Policymaker’s Guide to Tax Reform Trade-Offs, evaluates 86 distinct modifications to the federal tax code. Among its central findings is an in-depth analysis of four popular provisions enacted under the One Big Beautiful Bill Act (OBBBA), which are currently scheduled to sunset after 2028.

Popularized under the political banner of "no tax on" policies, these temporary cuts—covering overtime pay, auto loan interest, senior income adjustments, and tip earnings—enjoy bipartisan support from President Trump and various members of Congress. However, according to the Tax Foundation’s fiscal and economic models, preserving these carveouts permanently would punch a massive hole in the federal budget, deepen administrative headaches for workers and employers alike, and inject unprecedented distortions into an already complex tax code.

Main Facts: The Anatomy of the 2028 Sunsets

The debate centers on four temporary provisions introduced under the OBBBA framework, all slated to disappear at the close of 2028:

1. The Overtime Deduction: Allows taxpayers to deduct up to $12,500 of qualified overtime pay ($25,000 for joint filers) specifically targeting the "half" portion of time-and-a-half pay mandated by the Fair Labor Standards Act (FLSA).
2. The Auto Loan Interest Deduction: Permits deductions of up to $10,000 for interest paid on specific newly manufactured vehicles whose final assembly occurred within the United States.
3. The Enhanced Senior Deduction: Grants individuals aged 65 and older an additional $6,000 deduction, layered on top of existing tax structures.
4. The Tip Income Deduction: Enables service and tipped workers to deduct up to $25,000 in qualifying tip income from their taxable base.

While individually tailored to appeal to distinct voting blocks—hourly wage earners, automotive sectors, seniors, and hospitality workers—the overlapping mechanics of these provisions mean that extending them all simultaneously would expand the primary federal deficit by $577.3 billion between 2027 and 2036.

Crucially, the Tax Foundation notes that because these provisions interact with one another, their combined price tag is slightly lower than the sum of their standalone estimates. Yet, that fiscal relief comes at a steep price: structural complexity, heightened administrative burdens, and a sharp departure from tax neutrality.

Chronology of the Legislative and Policy Evolution

To understand how the U.S. tax code arrived at this juncture, it is necessary to trace the lifecycle of these targeted relief mechanisms from campaign rhetoric to statutory implementation, and finally to the impending cliff at the end of 2028.

• Campaign Trails to Legislative Halls (2024–2025): The concept of exempting specific streams of income—most notably tips and overtime—gained immense traction during recent election cycles. Promoted as direct relief for working-class Americans, these ideas transitioned into legislative reality with the passage of the OBBBA framework, establishing a temporary four-year window (2025–2028) for these deductions to take effect.
• Implementation and Confusion (2025–2026): As employers and tax professionals scrambled to operationalize the new rules, early cracks in the policy design appeared. Throughout 2026, the Internal Revenue Service (IRS) and financial institutions faced a flood of inquiries regarding eligibility. Taxpayers struggled to determine which categories of overtime qualified, which vehicles met the strict domestic final-assembly test for auto loan deductions, and how the new senior provisions interacted with existing standard deductions.
• The Present Policy Debate (Late 2020s): With the 2028 expiration date looming, lobbying efforts have intensified among interest groups seeking to make these provisions permanent. Conversely, fiscal watchdogs and economic modelers have begun releasing comprehensive long-term scorecards—such as the Tax Foundation’s Options 3.0 guide—highlighting the trade-offs of locking temporary political victories into permanent structural law.

Supporting Data and Economic Modeling

The Tax Foundation’s quantitative models provide a granular look at what permanent extension would mean for both the federal ledger and the broader U.S. economy. The findings reveal a stark disparity between fiscal costs and economic growth.

1. Overtime Pay Deduction (Option 34)

• Fiscal Cost: Increases the primary deficit by $372.4 billion over 10 years on a conventional basis.
• Economic Impact: Boosts the long-run size of the economy by a modest 0.1 percent by lowering marginal tax rates for eligible workers not caught in the phaseout range.
• Parameters: Available to itemizers and non-itemizers alike, beginning to phase out for single filers with modified adjusted gross incomes (MAGI) above $150,000 ($300,000 for joint filers).

2. Auto Loan Interest Deduction (Option 36)

• Fiscal Cost: Adds $33.7 billion to the 10-year primary deficit.
• Economic Impact: Results in a negligible or slightly negative long-run economic impact (reducing the economy’s size by less than 0.05 percent). While marginal rates drop for eligible buyers, tax increases triggered by the phaseout range (starting at $100,000 MAGI for singles and $200,000 for joint filers) entirely offset positive gains.
• Parameters: Restricted to new vehicles with domestic final assembly.

3. Enhanced Senior Deduction (Option 33)

• Fiscal Cost: Expands the 10-year primary deficit by $137.9 billion.
• Economic Impact: Increases long-run economic output by less than 0.05 percent. Because the benefit targets retirees rather than active labor market participants, its macroeconomic footprint is notably small.
• Parameters: Targets taxpayers 65 and older with an additional $6,000 deduction, phasing out at MAGI levels above $75,000 (single) and $150,000 (joint). Notably, this provision weakens the Social Security trust fund by reducing tax receipts collected on taxable Social Security benefits.

4. Tip Income Deduction (Option 35)

• Fiscal Cost: Increases the conventional 10-year deficit by $45.9 billion.
• Economic Impact: Yields an economic expansion of less than 0.05 percent.
• Parameters: Allows workers to deduct up to $25,000 in tips, phasing out above $150,000 (single) and $300,000 (joint). Data shows that low-income earners in the bottom 20 percent receive little to no benefit, as the standard deduction already shields the vast majority of their income from federal liability.

Official Responses and Stakeholder Perspectives

The debate over the OBBBA tax cuts has fractured along predictable lines, pitting political proponents of targeted relief against tax administrators, economists, and industry groups tasked with regulatory compliance.

Proponents of Extension

Lawmakers and executive branch officials who champion the "no tax on" agenda argue that these measures provide vital, direct relief to middle-class workers facing cost-of-living pressures. From this perspective, allowing overtime, tips, and auto loans to receive preferential tax treatment encourages hard work, supports domestic manufacturing (via the domestic assembly requirement for cars), and leaves more money in the pockets of everyday citizens. Supporters frame the provisions as targeted fairness for service workers, truck drivers, healthcare professionals, and seniors on fixed incomes.

Employers, Lenders, and Tax Administrators

Conversely, operational stakeholders have raised alarms over compliance nightmares. Auto lenders, commercial banks, and credit unions have formally petitioned the IRS for regulatory clarity, noting that verifying vehicle manufacturing origins and reporting specific interest streams introduces immense administrative drag. Similarly, human resources departments and payroll providers have struggled to cleanly isolate qualifying overtime components under complex FLSA formulas without sparking employee disputes.

Economists and Fiscal Analysts

Independent analytical bodies, such as the Tax Foundation, emphasize that these provisions violate core tenets of sound tax policy. By treating two workers earning identical total compensation differently based on how that compensation is labeled (e.g., base wages versus overtime or tips), the tax code becomes deeply non-neutral. Furthermore, the inclusion of strict income phaseouts creates high effective marginal tax rates—often referred to as "cliffs"—that can disincentivize career advancement or extra hours among workers hovering near the phaseout thresholds.

Broader Implications for U.S. Tax Reform

The implications of extending or letting these four provisions expire extend far beyond the immediate $577 billion price tag.

1. Erosion of the Tax Base: Carveouts narrow the overall tax base, forcing higher baseline rates elsewhere to maintain government revenues, or alternatively, accelerating national debt accumulation.
2. The Precedent of Special Interests: When the federal code introduces carveouts for specific professions or consumer purchases (such as tips or car loans), it opens the floodgates for competing industries. The Tax Foundation notes that these provisions have already inspired secondary proposals from other sectors seeking their own special tax status, threatening to turn the tax code into an unnavigable patchwork of special-interest preferences.
3. The Path Forward: The Tax Foundation’s analysis concludes that rather than locking these temporary complexities into permanent law, Congress should let them quietly sunset after 2028. In their view, lawmakers should redirect their energy toward broad-based, neutral tax reforms that lower rates across the board, eliminate compliance friction, and treat all similar forms of economic income equally.

As the 2028 expiration date draws nearer, the debate over the future of America’s tax code will undoubtedly intensify, forcing lawmakers to choose between the political allure of targeted tax relief and the economic stability of a simple, neutral, and fiscally responsible system.