This Note takes a fresh look at the Principal Purpose Test (“PPT”), which has been added to over 2,300 bilateral tax treaties since 2015 in an effort to fight tax avoidance. Under the PPT, countries may deny treaty benefits—such as lower tax rates on cross-border income—if it is reasonable for them to conclude that a taxpayer arranged a transaction principally to obtain those benefits.
Critics are skeptical of this rule. They argue that it is too vague and that it confers too much power on tax authorities. But this Note argues that those concerns may be overstated for two primary reasons. First, legal history shows that flexible standards like the PPT tend to become clearer over time, as courts and tax administrations develop more consistent—and more rule-like—interpretations. Second, although some countries might deploy the PPT aggressively, others can interpret it narrowly in an effort to continue attracting multinational businesses.
Whatever the PPT’s ultimate effect, the test will not dramatically reshape international taxation schemes. The PPT’s practical impact will not just be about the text of the test—it will be determined by how different countries choose to enforce it.
Introduction
The early 2010s represent perhaps the only time period in which international tax policy regularly filled the pages of the world’s largest newspapers.1 1.See, e.g., Jia Lynn Yang, Post Analysis of Dow 30 Firms Shows Declining Tax Burden as a Share of Profits, Wash. Post (Mar. 26, 2013), https://www.washingtonpost.com/business/economy/post-analysis-of-dow-30-firms-shows-declining-tax-burden-as-a-share-of-profits/2013/03/26/3dfe5132-7b9a-11e2-82e8-61a46c2cde3d_story.html.Show More With the global economy still reeling from the 2008 financial crisis, national governments in the United States and Europe publicly questioned the tax bills paid by the world’s largest companies.2 2.For a comprehensive discussion of these investigations and the ensuing public response, see Ruth Mason, The Transformation of International Tax, 114 Am. J. Int’l L. 353, 364–65 (2020). Show More The results of these investigations created a push for international tax changes by entities like the Organisation for Economic Co-operation and Development (“OECD”) and the Group of Twenty (“G20”).3 3.See Yariv Brauner, What the BEPS?, 16 Fla. Tax Rev. 55, 56–57, 60 (2014) [hereinafter Brauner, What the BEPS?].Show More
This Note discusses one component of these changes—a provision called the Principal Purpose Test (“PPT”). The PPT purports to target the abuse of tax treaties by allowing tax administrations to deny treaty benefits to a taxpayer if it is reasonable to conclude the taxpayer entered into a transaction principally to obtain those benefits.4 4.See OECD, Model Tax Convention on Income and on Capital art. 29(9) cmt. ¶¶ 176–177 (2017) [hereinafter OECD, 2017 Model], https://www.oecd.org/content/dam/oecd/en/publications/reports/2019/04/model-tax-convention-on-income-and-on-capital-2017-full-version_g1g972ee/g2g972ee-en.pdf [https://perma.cc/S82G-DH5A].Show More Commentators have described the power of the PPT in the hands of tax administrations in dramatic language, referencing the atomic bomb,5 5.Lee A. Sheppard, The PPT Through the Lens of the India-Mauritius Protocol, 114 Tax Notes Int’l 1147, 1149 (2024); see, e.g., Eran Levy, Is the Principal Purpose Test an “Atomic Bomb” and Should It Be Used Against Treaty Abuse?, Mich. J. Int’l L. Blog (Dec. 2017), https://www.mjilonline.org/eranlevy/ [https://perma.cc/HN4N-5S6N].Show More the COVID-19 pandemic,6 6.See Sheppard, supra note 5, at 1149.Show More and Sauron’s Ring of Power.7 7.See Craig Elliffe, The Meaning of the Principal Purpose Test: One Ring to Bind Them All?, 11 World Tax J. 47 (2019).Show More To those commentators, the PPT promises to fundamentally alter the world of tax treaties for the worse. Their perspective is based upon the PPT’s language, which can be read as broader than most similarly constructed anti-abuse rules;8 8.For example, the United States’ “business purpose” doctrine identifies and disallows transactions where a taxpayer was “motivated by no business purpose other than obtaining tax benefits.” Mixed tax and business purposes are permissible. Austin v. Comm’r, 113 T.C.M. (CCH) 69, 2017 WL 1437879, at *10–11 (Apr. 24, 2017) (first citing Gregory v. Helvering, 293 U.S. 465 (1935); and then citing Rice’s Toyota World, Inc. v. Comm’r, 752 F.2d 89, 91–92 (4th Cir. 1985)).Show More its authors—a large collection of countries—having specifically encouraged a sweeping interpretation;9 9.See OECD, 2017 Model, supra note 4.Show More and its status as a cornerstone of a global tax initiative aimed at transforming international tax.10 10.See Mason, supra note 2, at 364–65 (arguing that the G20/OECD’s project changed international tax’s participants, agenda, institutions, norms, and legal forms).Show More However, a contextualized approach to predicting the PPT’s effects suggests that commentators have overstated the test’s ultimate impact. This Note situates the PPT within the larger framework of tax competition and looks to the literature on legal form to paint what may be a more realistic picture of the provision’s ultimate impact.
This Note proceeds in five parts. Part I provides background on international tax policy, highlighting recent G20/OECD initiatives to change key elements of the international tax system. Part II introduces the PPT, its intended role in curbing treaty abuse, and the praise and criticism it has received. Part III argues that critics’ concerns about legal uncertainties created by the PPT are overstated in terms of the rule’s ultimate impact. The literature on legal form recognizes that standards become more rule-like as part of an everlasting oscillation between the two forms, and there is no reason to believe the PPT—currently a standard—is any different. Therefore, a focus on the PPT’s initial stage may obscure a future time when the provision will be more certain and targeted in scope. Part IV considers the potential moderating impact of tax competition on the interpretation of the PPT. The literature on legal form allows us to understand that the PPT’s open-ended design delegates discretion over its interpretation from the OECD to individual states, some of which wish to encourage defined and manageable corporate tax standards.11 11.See infra Part IV.Show More Thus, while the PPT’s language might raise overbreadth concerns on first reading, an analysis sensitive to international taxation’s competitive structure may indicate a more nuanced story to come. The Conclusion drives home this Note’s central thesis: viewed in proper context, the PPT may ultimately not be the “atomic bomb” of international tax.12 12.See Sheppard, supra note 5, at 1148–49; Levy, supra note 5.Show More
- See, e.g., Jia Lynn Yang, Post Analysis of Dow 30 Firms Shows Declining Tax Burden as a Share of Profits, Wash. Post
(Mar
. 26, 2013),
https://www.washingtonpost.com/business/economy/post-analysis-of-dow-30-firms-shows-declining-tax-burden-as-a-share-of-profits/2013/03/26/3dfe5132-7b9a-11e2-82e8-61a46c2cde3d_story.html. ↑
-
F
or a comprehensive discussion of these investigations and the ensuing public response, see Ruth Mason, The Transformation of International Tax,
114
Am. J. Int’l L.
353, 364–65 (2020).
- See Yariv Brauner, What the BEPS?, 16 Fla. Tax Rev.
55, 56–57, 60 (2014
) [hereinafter Brauner, What the BEPS?]. ↑
- See OECD, Model Tax Convention on Income and on Capital art. 29(9) cmt. ¶¶ 176–177 (2017) [hereinafter OECD, 2017 Model], https://www.oecd.org/content/dam/oecd/en/publications/reports/2019/04/model-tax-convention-on-income-and-on-capital-2017-full-version_g1g972ee/g2g972ee-en.pdf [https://perma.cc/S82G-DH5A]. ↑
- Lee A. Sheppard, The PPT Through the Lens of the India-Mauritius Protocol, 114 Tax Notes Int’l
1147, 1149 (2024);
see, e.g., Eran Levy, Is the Principal Purpose Test an “Atomic Bomb” and Should It Be Used Against Treaty Abuse?, Mich. J. Int’l L. Blog (Dec.
2017
), https://www.mjilonline.org/eranlevy/ [https://perma.cc/HN4N-5S6N]. ↑
- See Sheppard, supra note 5, at 1149. ↑
- See Craig Elliffe, The Meaning of the Principal Purpose Test: One Ring to Bind Them All?, 11 World Tax J. 47 (2019). ↑
- For example, the United States’ “business purpose” doctrine identifies and disallows transactions where a taxpayer was “motivated by no business purpose other than obtaining tax benefits.” Mixed tax and business purposes are permissible. Austin v. Comm’r, 113 T.C.M. (CCH) 69, 2017 WL 1437879, at *10–11 (Apr. 24, 2017) (first citing Gregory v. Helvering, 293 U.S. 465 (1935); and then citing Rice’s Toyota World, Inc. v. Comm’r, 752 F.2d 89, 91–92 (4th Cir. 1985)). ↑
- See OECD,
2017
Model
,
supra note 4. ↑
- See Mason, supra note 2, at 364–65 (arguing that the G20/OECD’s project changed international tax’s participants, agenda, institutions, norms, and legal forms). ↑
- See infra Part IV. ↑
- See Sheppard, supra note 5, at 1148–49; Levy, supra note 5. ↑