Comply, Refuse, or Defer: First Evidence on EU Public Country-by-Country Reporting
The European Union’s Public Country-by-Country Reporting (CbCR) Directive aims to make where multinationals operate and where they pay tax visible to investors, regulators, and the public. To that end, it requires large multinationals to publish jurisdiction-level data on revenues, profits, taxes, and employees. This report asks whether the Directive delivers on that objective.
Our purpose
Our purpose
The International Tax Observatory conducts innovative research on taxation, contributes to a democratic and inclusive debate on the future of taxation, and fosters dialogue between the scientific community, civil society, and policymakers worldwide.
Recent publications
08.07.2026
Comply, Refuse, or Defer: First Evidence on EU Public Country-by-Country Reporting
The European Union’s Public Country-by-Country Reporting (CbCR) Directive aims to make where multinationals operate and where they pay tax visible to investors, regulators, and the public. This report asks whether the Directive delivers on that objective.
27.04.2026
Offshore Wealth and Uneven Transparency: Implications for Developing Countries
This research note builds on the updated offshore wealth series from the Atlas of the Offshore World to examine these regional asymmetries and their implications for domestic revenue mobilization.
15.07.2026
California Billionaires: Wealth, Taxes, and Wealth Tax Revenue Estimates
This paper documents the wealth of California’s billionaires and the taxes they pay. California billionaires’ wealth exceeds $2 trillion today, the equivalent of 50% of California’s GDP. It has grown 144% from 2023 to 2025, fueled by the AI boom.
Press releases
14.04.2026
New report examines how to tax large fortunes more effectively in Latin America
The study assesses seven countries and finds that a minimum tax of 2% on fortunes above US$100 million could raise around US$24 billion a year, and restore progressivity at the top.
05.02.2026
Press Release: Announcing the International Tax Observatory
We are thrilled to announce the launch of the International Tax Observatory (ITO) on February 5, 2026. The ITO will continue and expand the work of the EU Tax Observatory.
04.12.2025
How profit shifting cuts into employee profit-sharing
Paris, December 4, 2025 - A new study by the European Tax Observatory, based on previously unpublished confidential data, shows that the 314 largest French multinationals shift more than €10 billion in profits out of France each year.
In the press
09.06.2026
The New York Times
Billionaires’ Billions Are Increasing Faster Than Ever
The stunning figures — calculated by the French economist Gabriel Zucman, director of the International Tax Observatory, a research organization funded by the European Union — reveal more than a surprisingly rapid increase in the concentration of wealth at the tippy top.
02.06.2026
The Economist
Gabriel Zucman makes the case for a billionaire tax
The super-rich should pay more tax. So says Gabriel Zucman. The French economist has spent his career uncovering the hidden workings of tax havens, who uses them and how.
26.05.2026
The New York Times
The Case for California’s Billionaire Wealth Tax
On taxes and much else, California has often led the country. In 1978 the state’s voters approved Proposition 13, which strongly limited tax increases.
Our Tools
To widen access to knowledge, the International Tax Observatory provides interactive tools, including a simulator of the tax deficit of multinational companies, and an explorer of country-by-country data on the activities of multinationals firms.
Our events
Prague 25.11.2026
Beyond BEPS: The Real Effects of International Taxation
Charles University, with the support of the European Commission (DG TAXUD) and in collaboration with the International Tax Observatory and Skatteforsk - Norwegian Centre for Tax Research, will host Beyond BEPS, a workshop on the real effects of international taxation, on 25–26 November 2026.
Room 2-21, Paris School of Economics 01.09.2024
The Offshore Talks
Join us for an engaging lecture series featuring a dynamic lineup of distinguished speakers who will uncover the hidden forces driving global inequality.
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