Tax Law Commons^™

Tax Exceptionalism After Loper Bright, Conor Clarke, Noah Hertz Marks

Faculty Publications

In this article, the authors consider what Loper Bright means for the relevance of Mayo Foundation and National Muffler as well as its broader implications for agency-specific deference, and they examine older case law that can be helpful post-Loper Bright.

Analysis Of The Impacts Of Propositions 41 And 42 On California Public Finance, David Gamage, Brian D. Galle, Darien Shanske

Faculty Publications

This memorandum discusses the possible collateral damage that Propositions 41 and 42 (on the ballot in California on November 3, 2026) might cause.  The two propositions were concocted very quickly by billionaires in order to trick voters that will vote for Proposition 40 (the billionaire tax) also to vote for these propositions that are designed to undermine the billionaire tax.

The basic trick is that these propositions have plausible seeming veneers but hide a poison pill that aims to frustrate the functioning of the billionaire tax.  The veneers are “plausible seeming” because they address problems that are not problems.  For …

Transformative Technology And Shortening The Statute Of Limitations Applicable To Taxpayers, Jay A. Soled, Leslie Book

Faculty Publications

When it comes to submitting tax returns and paying taxes, most taxpayers understand the nature of their civic duties and do so dutifully, if not willingly. However, many taxpayers fail to grasp why the IRS has such an elongated time period—namely, three years— to audit their tax returns and propose an assessment. Indeed, when the IRS exercises its oversight authority, records may no longer be available, and memories may be dulled.

Since the original institution of the three-year tax assessment limitations period nearly a century ago, tremendous technological strides have been made. Indeed, over ninety percent of income tax returns …

Toddlers, Investors, And Tax Policy, Lauren Shores Pelikan

Faculty Publications

There is a continuing childcare crisis that worsens every year. Congress has historically used tax incentives aimed at parents and employers to try to alleviate the lack of affordable childcare. However, with private equity's increasing investment in the childcare sector, this Article advocates for an entirely new approach: Congress should encourage more people to work in the childcare sector by enacting a tax benefit for the individual childcare service provider.

Childcare is a broken market. The labor-intensive nature of the industry results in razor thin profit margins, and wages remain low due to entrenched racial and gender norms. There is …

Expert Report On Valuation Of Controlling Shares Of Publicly Traded Companies Under The California Billionaire Tax Act (Cbta), David Gamage, Brian D. Galle, Emmanuel Saez, Darien Shanske

Faculty Publications

This short memo addresses concerns that have been raised under the proposed California Billionaire Tax Act (CBTA or Act) about the valuation of "voting" or "special control" shares, particularly with regard to shares held in publicly traded companies. A misreading of the CBTA is circulating that claims that voting shares of all assets will be taxed in full regardless of their actual value. This is false, as shown by a straightforward reading about the provision relating to voting and special control shares in context.

Correcting The Record: Responding To Some Legal Arguments About The 2026 Billionaire Tax Act, David Gamage, Brian D. Galle, Darien Shanske

Faculty Publications

If adopted by California voters in November of 2026, the 2026 California Billionaire Tax Act (CBTA) would impose a one-time 5% tax on the net worth of California billionaires, payable in five annual installments of 1% over 5 years (plus a small deferral charge). Critics have raised several arguments suggesting that the Act would not bring in the expected $100 billion in projected revenues because, the critics say, key parts of the Act are unconstitutional and would be subject to legal challenge. In fact, the supposed new legal challenges critics identify are mostly just very old arguments that courts have …

Expert Report On The California 2026 Billionaire Tax: Revenue, Economic, And Constitutional Analysis, David Gamage, Brian D. Galle, Emmanuel Saez, Darien Shanske

Faculty Publications

This report summarizes key provisions of the California Billionaire Tax Act. It also answers some frequently asked questions.

Taxing Dynasties, David Gamage, Brian D. Galle, Bob Lord

Faculty Publications

The estate tax and the broader wealth-transfer-tax system are even more broken than is commonly understood. Over the past two decades, researchers and policy experts have identified a handful of key tactics that mega-rich families use to pass wealth from generation to generation without paying tax. These tax dodges are notorious enough to be known by their acronyms, such as the IDGT and the GRAT. Scholars and policymakers have proposed reforms to block these tactics, or at least to make them more difficult.

In this Article, we present new analysis, backed by new empirical findings, to show that these proposed …

Against Doctrinal Siloing: Harmonizing Fiscal Federalism And The U.S. Constitution, David Gamage, Darien Shanske

Faculty Publications

This Essay argues that constitutional law’s treatment of fiscal federalism has fractured into a bewildering collection of doctrinal silos. Federal spending that pressures states, federal preemption of state taxes, the Dormant Commerce Clause, sovereign immunity, Section 5 of the Fourteenth Amendment, and the federal taxing power are all analyzed through distinct tests, even when they implicate the same basic conflict between federal authority and state fiscal autonomy. The result is not just theoretical confusion but inconsistent constitutional answers. Current doctrine can protect states from comparatively modest liabilities while leaving uncertain whether Congress may displace large swaths of state revenue authority. …

Book Review: Untaxed: The Rich, The Irs,And A New Approach To Tax Compliance, Leslie Book

Faculty Publications

No abstract provided.

Ncti Is The New Gilti, And States Should Still Conform, David Gamage, Darien Shanske

Faculty Publications

This essay continues our series on corporate profit shifting by analyzing how states should respond to the federal One Big Beautiful Bill Act, which transformed GILTI into the new Net Controlled Foreign Corporation Tested Income (NCTI) regime. We argue that states should conform to this new federal provision as a reasonable and legally sound approach to combatting the persistent profit shifting that erodes state tax bases. The 60 percent inclusion rate for NCTI effectively serves as a practical, "rough justice" estimate of income that was economically generated domestically but improperly shifted offshore — an estimate supported by empirical research. We …

Profit Shifting And The States: A Short Primer, David Gamage

Faculty Publications

This essay argues that corporate profit shifting remains one of the most significant challenges for U.S. state tax systems. Multinational enterprises continue to shift billions in profits to offshore tax havens, eroding state tax bases, distorting market competition, and forcing a greater reliance on more regressive taxes. We contend that the dominant "water's-edge" combined reporting method used by most states is structurally inadequate to combat modern profit-shifting techniques, which primarily involve the manipulation of intangible assets. The recent transformation of federal tax law (from GILTI to NCTI) and the global adoption of the OECD's Pillar 2 minimum tax framework create …

Assessing The Tax Communications Of E-Commerce Vendors, Part Ii, David Gamage

Faculty Publications

This article presents the second part of a research project on the tax communications of e-commerce vendors. It details the results of a behavioral experiment designed to test how different representations of sales and use tax obligations influence consumer purchasing decisions. The study finds that potentially misleading indicators, such as "No Tax" or "$0 of Tax," significantly increase the likelihood that consumers will purchase from vendors who do not collect sales tax. Compared to vendors who provide accurate information about potential use tax liabilities, consumers were substantially more likely to choose a vendor displaying a "No Tax" message. These findings …

Winter Is Coming: What States Should Do Now, Part I, David Gamage, Darien Shanske

Faculty Publications

This Article addresses the unprecedented fiscal challenges facing state governments as federal policy shifts threaten to create a perfect storm of revenue losses and increased service demands. As states confront potential federal cuts to essential services like Medicaid, reduced tax enforcement capacity, and possible tariff-driven economic disruption, we argue that piecemeal responses will prove insufficient.

We propose a seven-step framework for state fiscal resilience: (1) pausing automatic conformity to federal tax changes to preserve revenue bases; (2) enhancing state tax enforcement capacity by hiring federal personnel as the IRS sheds expertise; (3) maintaining and expanding taxpayer service innovations like direct …

Assessing The Tax Communications Of E-Commerce Vendors, Part I, David Gamage

Faculty Publications

This article reports research results from a study analyzing the tax communication practices of top e-commerce retailers and marketplaces. The research found a spectrum of tax communication practices. Notably, many (but not all) e-commerce businesses that did not collect sales tax did still inform customers about potential use tax obligations, though the transparency of this information varied.

Beyond Blinders And Boomerangs: Assessing State Business Taxation, David Gamage

Faculty Publications

Karl A. Frieden’s article, “Wearing Blinders in the Debate Over Business’s ‘Fair Share’ of State Taxes” and his subsequent article, “The Boomerang Effect of the Business ‘Fair Share’ Tax Debate,” jointly contend that progressive calls to strengthen state corporate income taxes (CITs) are misguided because businesses allegedly overpay certain other state and local taxes. This essay argues that, while Frieden does raise some valid points about the efficiency of specific tax design choices, his core argument fundamentally misconstrues the central issues: the ultimate incidence of business taxes, the pursuit of equity and efficiency, and the importance of combating harmful tax …

Tax Base Diversification As An Enforcement Tool, David Gamage, Brian Galle, Yulia Kuchumova

Faculty Publications

We examine when it is optimal to employ sales or VAT-type taxes as complements to a labor income tax. We find a Ramsey-type result in which each tax instrument should be imposed in inverse proportion to the combined elasticity of real and avoidance responses to the respective tax. Contrary to some prior results, we find that sales-type taxes are optimally non-zero across a variety of settings, and in particular when the (weighted) elasticity of taxable income with respect to the wage tax is greater than the cross-elasticity of taxable income with respect to the sales tax. We argue this parameter …

Money Moves: Taxing The Wealthy At The State Level, David Gamage, Brian D. Galle, Darien Shanske

Faculty Publications

It's widely understood today that inequality is a major social problem that in turn contributes to other crises. By most accounts, tax systems are supposed to be our engines of equality. Yet in today’s United States, state and local tax systems mostly do the opposite: they take a greater percentage of the resources of the poor and middle class than of the rich.

Perhaps surprisingly, the traditional view among fiscal policy experts has been that this state of affairs is correct. In this standard account, only national governments should impose progressive or redistributive taxes. While acknowledging that there would be …

Moore Questions, Some Answers: Fixing The Personal Tax System Despite Constitutional Constraints, David Gamage, John R. Brooks, Edward J. Mccaffery

Faculty Publications

Moore v United States was expected to rule on the constitutional necessity of the tax-law realization requirement originating from Eisner v Macomber, a potential impediment to progressive tax reform efforts aimed at shutting down the planning techniques of Buy Borrow Die. The various opinions in Moore, however, provided no definitive answer to this core question, instead leaving many more questions. Amid the lingering uncertainty, we argue that various responses to the problem of wealthy Americans’ not needing to pay any taxes remain possible after Moore. An incremental, “mix-and-match” approach to progressive tax reform may best suit the …

Virtual Currency As Real Currency, Jeffrey A. Maine

Faculty Publications

Convertible virtual currency is increasingly equated with the notion of real currency. Indeed, the increased acceptance of virtual currency as a payment method among retailers and consumers, the evolution of new types of virtual currency that alleviate price volatility, and the recent expansion of foreign country initiatives confirm the strong trajectory toward virtual currency’s function as a transactional currency. Yet, the tax system continues to classify all forms of virtual currency as “property,” and not “currency,” which results in immediate taxation every time someone buys something with virtual currency. This Article argues that the adopted tax treatment of virtual currency …

Wellness And The Tax Law, Leigh Z. Osofsky

Faculty Publications

The tax law has long provided extensive subsidies for “medical care.” These subsidies cost the government hundreds of billions of dollars a year. The definition of medical care, which is at the heart of these subsidies, originated many decades ago at a time when there was little to no conception of wellness.

Times have changed in the medical world. Medical science now emphasizes that wellness practices, like exercise, meditation, and social connection, have an important impact on physical as well as mental health, including by playing a significant role in preventing and treating disease. Under the tax statute, medical care …

The Policy And Politics Of Alternative Minimum Taxes, David Gamage, Ari Glogower

Faculty Publications

This paper contributes to a literature offering qualified justifications for alternative minimum tax (AMT) structures. We conclude that there is a narrow case for justifying AMTs even from the social planner perspective and that the proposed Billionaire’s Minimum Income Tax satisfies that narrow case. Next, incorporating governance collective action problems and electoral political constraints, we conclude that these considerations support a broader case for justifying AMTs that potentially also supports both preference-disallowance AMTs and the new corporate alternative minimum tax enacted in 2022.

Squeezing Blood From Stones? A Comparative Analysis Of Tax Relief For Victim-Survivors In Australia And The United States, Christine Speidel, Leslie Book, Ann Kayis-Kumar

Faculty Publications

Women who leave abusive relationships generally do so with increased debt, reduced assets, insecure housing and longer-term economic insecurity. Most of these women will be experiencing economic abuse even after the relationship has ended, and many cite financial instability as a key factor driving them back into abusive relationships. So, it is imperative that the tax and transfer system helps rather than hinders (albeit inadvertently) this cohort of financially vulnerable taxpayers. However, this is not always the case, with victim-survivors of economic abuse often liable for tax debts incurred by former partners operating businesses in the victim-survivor's name.

This article …

State Constitutional Limitations To Cities Taxing The Digital Economy, Lauren Shores Pelikan

Faculty Publications

The digital economy’s rapid evolution, most recently with the rise of artificial intelligence, demands a reevaluation of state constitutional limitations on local taxation of digital transactions. Citizens have long feared excessive or unfair tax burdens, hence the adoption of constitutional amendments that prohibit legislators from increasing taxes or imposing new taxes without a public vote. However, these constitutional limitations are now preventing cities from taxing digital transactions that are taking over the economy. This is a serious financial problem for cities whose traditional sources of tax revenue, such as sales taxes and property taxes, are dwindling due to the digitalizing …

Coping With California’S Deficit, Part 1: Borrowing And Taxes, David Gamage, Darien Shanske

Faculty Publications

In this installment of Academic Perspectives on SALT, Shanske and Gamage examine California’s projected budget deficit and possible solutions. California has a large budget deficit that is predicted to last for several years. In this two-part series, we will place California’s situation in context and propose solutions.

The state should use short-term borrowing to cover at least some of the cyclical shortfall. That the real revenue cycle is unlikely to neatly unfold over one traditional fiscal year should not change this conclusion. To that end, we will show how California can operationalize this simple insight despite the impression some may …

The Original Meaning Of The Sixteenth Amendment, David Gamage, John R. Brooks

Faculty Publications

The Sixteenth Amendment to the United States Constitution enshrines Congress’s “power to lay and collect taxes on incomes, from whatever source derived.” Challenges to the exercise of that power have typically turned on whether the thing being taxed is “income” or not. In the most recent example, the 2024 Supreme Court case of Moore v. United States, taxpayers argued that the Sixteenth Amendment only authorizes taxation of realized income—that is, that gain from appreciated property can only be taxed as “income” when there has been a sale or conversion of that property.

In this Article we argue—based on the original …

Current Developments In Tax Malpractice: Basics And Beyond, Jacob L. Todres

Faculty Publications

It was always assumed that “tax malpractice” referred to a situation in which an error occurred with respect to some tax provision or in a tax-related administrative or legal proceeding. However, several recent cases have expanded this thinking, introducing the possibility that tax malpractice may also occur where damages include an increase in taxes—irrespective of whether there was an error that directly involved tax law. Beginning with a discussion of the evolving definition of that term as seen in the New York cases of Serino v. Lipper and Bloostein v. Morrison Cohen LLP and whether these cases may have returned …

Identifying And Supporting Financially Vulnerable Women Experiencing Economic Abuse: A Grounded Theory Approach, Leslie Book, Ann Kayis-Kumar, Youngdeok Lim, Jack Noone, Michael Walpole, Jan Breckenridge

Faculty Publications

This study extends the literature by exploring the role of pro bono tax clinics within the social impact ecosystem with a focus on the experiences of women in financial distress who are otherwise unable to access professional tax advice. Using clinic data derived from a pro bono tax advisory clinic, this article finds that 58 per cent of financially vulnerable women seeking pro bono tax services have experienced domestic and family violence (DFV), confirming again the link between financial stress and economic abuse. Yet only 3 per cent of these women were receiving domestic and family violence-related support, highlighting the …

Did The Washington Supreme Court Rule Correctly On The Capital Gains Tax?, David Gamage, Jared Walczak

Faculty Publications

The following two essays are David Gamage’s and Jared Walczak’s opening statements in their debate over Quinn v. Washington,1 the recent Washington Supreme Court decision upholding a state tax on capital gains as an excise tax. Gamage and Walczak, who differ on the decision’s merits and its implications for future Washington tax jurisprudence, intend to follow these statements with rebuttals and conclusions in a subsequent article.

Collection Due Process At Twenty-Five: A Still Important And Needed Check On Irs Collection, Leslie Book

Faculty Publications

No abstract provided.