153. Multilateral tax cooperation gets one step closer

Episode Summary

Executive Summary: The episode explains how multinational companies are taxed under a century-old system built around residence and source, not market sales, and how profit shifting plus tax competition have eroded it. It then maps the OECD/G7 reform effort: Pillar 1 would reallocate some taxing rights to market countries, while Pillar 2 would impose a global minimum tax of at least 15% on large firms.

Main Topics: Origins of the international tax system (Priority: 5/5): Sunita Jagarajan explains that post-WWI concerns about double taxation and rebuilding capital markets led the League of Nations to design the basic cross-border tax framework still embedded in thousands of treaties. How multinationals are taxed today (Priority: 5/5): The old system splits taxing rights between source and residence countries, requires physical presence, and uses transfer pricing/arm's-length pricing to value intra-firm transactions. Profit shifting and tax havens (Priority: 5/5): Gabriel Zucman describes how firms move paper profits to low-tax jurisdictions through transfer pricing, intra-group borrowing, risk allocation, and locating intangibles in havens like Bermuda. Race to the bottom in corporate tax rates (Priority: 4/5): Countries compete by lowering rates to attract mobile profits, driving average headline corporate tax rates down sharply over recent decades and reducing sovereignty for higher-tax states. Pillar 1: reallocating taxing rights to market countries (Priority: 4/5): The proposed reform would tax a slice of residual profits based on sales location, aiming to capture value from digital and consumer-facing firms and reduce gamesmanship. Pillar 2: global minimum tax (Priority: 5/5): The minimum tax proposal, endorsed by the G7 at at least 15%, would let countries top up low-taxed profits of large multinationals and is presented as the more consequential reform. Political and implementation challenges (Priority: 4/5): Developing countries worry about complexity, limited revenue gains, disputes, sovereignty, and thresholds that favor rich countries; implementation requires broad multilateral agreement and treaty changes.

Key Arguments: The current system is outdated because it was designed a century ago around physical presence and double-taxation concerns, not modern intangible-heavy multinationals. There is no obvious single best way to allocate taxing rights, but the historical choice favored residence/source because it was familiar and politically feasible. Profit shifting is large-scale and legal enough to be embedded in the current rules, letting firms report profits in zero-tax jurisdictions while operating elsewhere. Intangible assets make tax avoidance especially easy because brands, algorithms, and IP can be located on paper in havens without moving physical activity. Pillar 1 is conceptually cleaner than the status quo because sales are harder to move than profits, but it may yield relatively little revenue and is politically difficult. Pillar 2 is more powerful because it weakens the incentive for tax havens to offer ultra-low rates and could reduce the global race to the bottom. Developing countries may benefit from reform in principle, but they worry the negotiated design is too complex, too narrow, and too favorable to rich residence countries. Without global coordination, unilateral taxes and overlapping claims can create uncertainty, double taxation, and trade-style retaliation dynamics. A binding dispute-resolution mechanism would improve certainty for firms but may be seen by developing countries as a threat to sovereignty. The talks are as much about distribution and power as they are about technical tax design; countries with headquarters and tech giants have more leverage than poorer market economies.

Data Points: Countries negotiating: More than 130 / 139 countries - The episode says over 130 countries are trying to solve the issue; later it refers to 139 countries in the inclusive OECD framework. G7 minimum tax: At least 15% - G7 finance ministers agreed on June 5 to support a global minimum corporate tax of at least 15%. Age of current system: About 100 years - The core international tax framework traces to the post-WWI League of Nations era. Double tax treaties: More than 3,000 - The League-inspired principles were embedded into thousands of bilateral tax agreements. Missing profits estimate: Almost 40% - Zucman and coauthors estimate nearly 40% of profits reported outside multinationals' residence countries are shifted. Global shifted profits: Around $700 billion per year - The discussion cites annual paper profit shifting to tax havens at roughly this scale. Share of shifted profits by U.S. multinationals: About 50% - The transcript says U.S. multinationals account for about half of globally shifted profits. Share of shifted profits by EU multinationals: About 25% to 30% - EU multinationals are estimated to account for roughly a quarter to a third of shifted profits. Estimated revenue loss from profit shifting: 4% to 10% of corporate tax receipts / $100 billion to $240 billion - The OECD estimate cited says legal profit shifting reduces receipts by this amount. Headline corporate tax rate decline: 49% in 1985 to 24% in 2018 - Used as evidence of a long-term race to the bottom. Revenue effect of minimum tax: 2.7% increase in corporate tax revenues - OECD estimate for a minimum tax, excluding the U.S. Pillar 1 revenue estimate: $5 billion to $12 billion - OECD impact assessment for the reallocation proposal. Company size threshold: €750 million revenue - Main Pillar 2 threshold for large multinationals. Alternative discussed threshold: €250 million - Mentioned by ATAF as potentially more realistic for smaller economies. Irish case: Google Bermuda recorded almost $20 billion in revenue in 2019 - Example of royalty flows from IP held in Bermuda. Pillar 1 reallocation share: 20% of residual/excess profits above a 10% routine return - Described as the dominant proposal at the time of recording.

Pivotal Quotes: "The main problem with the current system of international taxation is that there is widespread profit shifting by multinational companies to tax havens." — Gabriel Zucman: Explaining why the existing source-based system is being challenged. "What we found is that the location of paper profits would change enormously." — Gabriel Zucman: Describing the effects of hypothetical tax harmonization on profit location. "The lesson here is that a half-baked status quo can be a really powerful influence over what comes next." — Samaya Keynes: Summarizing why the League of Nations' legacy still shapes modern tax rules.

Implications: A deal could curb tax havens, raise revenues, and reduce profit shifting, but the final outcome will hinge on complex bargaining over thresholds, dispute rules, and who gets the top-up revenue. Poorer countries may still see limited gains unless the design becomes more inclusive.