165. The global minimum tax got left behind. What’s next?

Episode Summary

Executive Summary: The episode examines how the Inflation Reduction Act advanced U.S. climate, health, and tax policy but stopped short of implementing the OECD’s global minimum corporate tax. Through a history of international tax rules and profit shifting, it shows why country-by-country taxation matters, how past U.S. reforms fell short, and what the IRA’s omission means for multilateral cooperation, corporate behavior, and future U.S. policy.

Main Topics: Origins of international tax rules (Priority: 5/5): The discussion traces international tax to bilateral treaties designed mainly to prevent double taxation after World War I, not to create a true multilateral system. Rise of profit shifting and tax havens (Priority: 5/5): As globalization, intangibles, and regulatory changes made profits easier to move than factories, multinational firms increasingly shifted paper profits to low-tax jurisdictions. Why the OECD global minimum tax mattered (Priority: 5/5): The OECD initiative aimed to solve the collective-action problem by ending the race to the bottom through a country-by-country minimum tax on multinationals. Limits of the 2017 Tax Cuts and Jobs Act (Priority: 4/5): TCJA introduced GILTI and BEAT as partial minimum taxes, but averaging across countries left incentives to book profits in havens and created perverse outcomes. DSTs and trade conflict (Priority: 4/5): France and others adopted digital services taxes that U.S. officials viewed as discriminatory against American firms, triggering threats of retaliation and linking tax policy to trade. Biden administration push and OECD breakthrough (Priority: 5/5): The Biden Treasury team helped secure a 2021 political agreement among 135+ countries for a 15% global minimum tax, but domestic implementation proved difficult. Inflation Reduction Act’s partial outcome (Priority: 5/5): IRA enacted a 15% U.S. corporate alternative minimum tax, but not the OECD-compliant country-by-country minimum tax, leaving the international coordination problem unresolved.

Key Arguments: International tax has historically been about avoiding double taxation, not coordinating a true global system for taxing multinational profits. Multinationals rarely move factories solely for tax reasons; the stronger evidence is that they shift paper profits to low-tax jurisdictions. The growth of intangible capital makes profit location more ambiguous, enabling sophisticated tax planning through royalties, debt, and transfer pricing. Low-tax jurisdictions such as Ireland, Switzerland, the Netherlands, Bermuda, the Cayman Islands, Luxembourg, and sometimes Singapore capture outsized reported profits relative to real activity. The 2017 U.S. minimum tax regime (GILTI) was undermined by averaging, allowing firms to offset haven income with high-tax foreign income and still prefer offshore booking over U.S. taxation. A country-by-country minimum tax is much more effective than a global average because it removes incentives for jurisdictions to remain at 0% and undercut others. DSTs created a trade-policy backlash because some were structured to target U.S. digital firms, making them resemble discriminatory import measures. The Biden administration saw international tax reform as a way to raise revenue, improve equity, and tax excess profits rather than labor or consumers. The OECD agreement was a major achievement because it brought 135 countries, representing about 95% of world GDP, into a common framework. The IRA’s 15% corporate minimum tax is not the same as the OECD deal because it is not country-by-country, so it does not fully stop profit shifting or align U.S. rules with other countries' top-up taxes. If the U.S. does not conform, future responses could include alignment, retaliation/trade conflict, or the collapse of the cooperative agreement.

Data Points: Date of IRA signing: August 16, 2022 - President Biden signed the Inflation Reduction Act into law. Corporate minimum tax rate in IRA: 15% - The IRA included a corporate alternative minimum tax. Global minimum tax rate in OECD deal: 15% - The 2021 multilateral agreement set a country-by-country minimum tax rate. Biden campaign proposed minimum tax: 21% - The campaign initially advocated a country-by-country minimum tax at a higher rate. Countries in OECD agreement: 135+ countries - The October 2021 political agreement on global tax reform. Share of world GDP represented: About 95% - The countries in the OECD agreement accounted for nearly all global GDP. U.S. minimum tax on foreign income under TCJA: 10.5% - GILTI was designed to ensure a minimum average tax rate on foreign income. U.S. corporate tax rate under TCJA reference: 21% - The discussion contrasted the foreign minimum tax with U.S. domestic taxation. U.S. firms paying zero federal income tax: 55 companies on $40 billion profit - Used by Biden in remarks supporting the IRA's corporate tax changes. Typical profit per employee abroad: Around $40,000 - Worldwide average for U.S. multinationals' foreign employees. Profits per employee in low-tax jurisdictions: 10x, 100x, or 1,000x the worldwide average - Evidence of extreme profit concentration in tax havens. OECD process start: 2013 - The OECD began work on global tax reform that year. TCJA year: 2017 - U.S. tax reform introduced GILTI and BEAT.

Pivotal Quotes: "with this law, the American people won and the special interests lost" — Joe Biden: Biden celebrating the Inflation Reduction Act signing. "what a global minimum corporate tax is and why that matters is the topic of today's show" — Chad Bowne: The host frames the episode’s central question. "there's much more overwhelming and consistent evidence that paper profits or where profits are reported for tax purposes are very sensitive to tax differences across countries" — Kim Clausing: Explaining what multinational firms actually move in response to tax incentives.

Implications: The IRA strengthened U.S. tax policy but missed a chance to anchor global coordination. Without country-by-country alignment, profit shifting, top-up taxes abroad, and trade disputes may persist unless the U.S. or others complete implementation.