The Offshore System
Trillions in motion, mostly out of sight. How the offshore system works, who uses it, and why it shapes inequality, geopolitics, and tax policy.
(EU Tax Observatory estimate from gaps in international statistics, about 12% of world GDP; James Henry's 2012 Tax Justice Network estimate, on other data, was $21-32T for 2010; neither counts property)
(about $1T; Tørsløv, Wier and Zucman's method, updated by the EU Tax Observatory; Blouin and Robinson argue such data can double-count profits, which Zucman's team says its method avoids)
(in force in several dozen jurisdictions since 2024; US-parented groups exempt from its main rules since January 2026)
A note on framing. The offshore system is one of the most consequential features of the global economy and one of the most poorly understood in mainstream coverage. It is a connected network of jurisdictions, law firms, accountancies, banks, and financial vehicles that allow wealth and corporate profits to be held, moved, and reported in ways that minimize tax, regulation, and visibility. Some of what happens in this system is illegal. Most of it is technically legal under the rules as written. The interesting question is who wrote those rules and who benefits.
What the offshore system is
The popular picture of "offshore" - a tropical island, a shell company, a numbered account - captures a thin slice of what the system actually does. The reality is broader. The offshore system is a network of jurisdictions that compete with each other to attract capital by offering some combination of low taxes, financial secrecy, light regulation, flexible legal structures, and favorable courts. The jurisdictions that matter most are not the ones most people picture. Switzerland, Luxembourg, Ireland, the Netherlands, Singapore, Hong Kong, the United Kingdom (especially through its overseas territories like the British Virgin Islands and Cayman Islands), and the United States (especially Delaware, Wyoming, South Dakota, and Nevada through their trust laws) collectively handle most of the volume.
What people use offshore structures for is more varied than "tax dodging," though tax minimization is the largest single use case. Multinational corporations route profits through low-tax jurisdictions to reduce their effective tax rates. Wealthy individuals hold assets in offshore trusts to manage taxes, inheritance, and legal exposure. Funds and family offices use offshore vehicles to coordinate cross-border investments without triggering each country's tax and regulatory regime. Sanctioned individuals hide ownership behind layered structures. Authoritarian elites move money out of countries where political risk is high. Ordinary cross-border businesses use offshore entities for legitimate operational reasons. Treating the system as one thing flattens distinctions that matter.
What makes the system possible is not secrecy alone but a chain of professional services that translate offshore structures into onshore-usable wealth. London real estate, US Treasury bonds, Swiss art markets, Manhattan condos, and global stock indices are the destinations. Lawyers, accountants, trust companies, and bankers in major financial centers are the connective tissue. The Panama Papers (2016), Paradise Papers (2017), Pandora Papers (2021), Suisse Secrets (2022), and Cyprus Confidential (2023) leaks each documented the same underlying pattern: the system is not "elsewhere." It is integrated into the financial centers of the largest democracies, often by their own residents and their own professional class.
Who uses it
The composition of offshore-held wealth has been studied carefully by economists, most prominently Gabriel Zucman and collaborators using cross-country statistical anomalies and the leaked datasets. Multinational corporations - especially in pharmaceuticals, technology, and finance - route a large share of profits through low-tax jurisdictions, with effective tax rates well below their statutory rates in headquarter countries. Offshore wealth is concentrated at the top: in Scandinavian tax records matched to leaked bank data, the richest 0.01% of households evaded about a quarter of their taxes. Wealth from Russia, the Gulf, and parts of Africa and Latin America is heavily over-represented. Offshore holdings equal about 60% of GDP in Gulf countries, against a few percent in Scandinavia.
Ordinary businesses also use offshore structures, often for reasons that are not primarily tax-driven: legal certainty under English-law jurisdictions, ease of cross-border investor coordination, neutral arbitration forums. The Cayman Islands hosts a large fraction of the world's hedge funds for reasons that are partly tax-related and partly about legal infrastructure. Distinguishing these uses matters for policy. A regime designed to stop kleptocratic wealth from authoritarian regimes will look different from one designed to capture more corporate tax revenue from US technology companies, even if both target "offshore."
One implication of the data is that "tax fairness" debates often miss the largest offshore users. Public attention focuses on celebrity tax cases and high-profile corporate scandals. The bulk of offshore activity involves less visible wealthy individuals and large corporations using structures their advisors have built carefully to comply with the letter of the law as written. Reform that targets the most visible cases without changing the underlying rules tends to produce limited revenue gains while creating the impression that something has been done.
Why it persists
The offshore system has been the subject of reform efforts for decades. Most have produced incremental change rather than transformation, for several reasons.
Tax competition. Each jurisdiction that cuts taxes or enforcement can gain business at others' expense. Critics call the result a race to the bottom that only coordination among major economies can stop. Defenders answer that competition restrains governments, that low-tax centers can also support investment in high-tax countries, and that tax rates are a sovereign choice. The 2021 OECD agreement on a 15% global minimum corporate tax was the first serious attempt at coordination. UN talks on a tax convention, due in 2027, began in 2025; the United States left them, saying the result would "unacceptably hamper nations' ability to enact tax policies."
Beneficial complexity. The professional class that builds offshore structures has direct economic interest in their continued existence. Major law firms, accountancies, and banks earn substantial fees from offshore work. Their lobbying capacity in tax-rule-writing jurisdictions is significant. This is not corruption in the simple sense; it is a shared commercial interest in keeping the system complex and functional.
Useful for governments too. Several countries that publicly criticize tax havens host major offshore activities themselves. The United Kingdom's relationship with its overseas territories, the United States' state-level trust competition, the Netherlands and Luxembourg's role within the EU, and Switzerland's relationship with the broader European market all involve substantial domestic economic benefit from offshore activity. The political will to reform is moderated by the political reality that reform reduces domestic income.
Legitimate functions. Some offshore activity provides services that mainstream financial systems do not, or do not provide as efficiently. Cross-border investment funds need a neutral legal jurisdiction. International joint ventures benefit from simplified ownership structures. Estate planning crosses borders for families with international ties. Reform that eliminates the legitimate uses while leaving the abusive ones tends to fail politically. Reform that distinguishes between them is harder to design than slogans suggest.
Enforcement gaps. Information sharing between tax authorities improved substantially after the 2008 crisis (the US Foreign Account Tax Compliance Act, or FATCA, and the Common Reporting Standard). Enforcement against ultra-wealthy individuals has proven harder than against ordinary tax evaders because of the legal resources available to the wealthy and the complexity of multi-jurisdictional structures. The US Internal Revenue Service's budget for high-net-worth audits has been cut multiple times in recent decades.
The reform landscape
Three major reform efforts have shaped the current offshore landscape, with mixed results.
FATCA (US, 2010) and the Common Reporting Standard (OECD, 2014). These required financial institutions globally to report account information to home-country tax authorities. The EU Tax Observatory (since 2026 the International Tax Observatory) estimates that offshore tax evasion fell by a factor of about three in less than a decade. Wealth did not stop being held offshore - it was still about 12% of world GDP in 2022 - and some moved to assets the reporting does not cover, notably real estate. The reform closed one door and opened others.
Base Erosion and Profit Shifting (BEPS; OECD, since 2013). The BEPS project addressed multinational corporate tax avoidance through a series of rule changes, implemented partially and unevenly; some specific abuses have been reduced. The EU Tax Observatory estimates that about $1 trillion was still shifted to havens in 2022, with no discernible effect of policy so far; Blouin and Robinson, among others, argue that such estimates run too high.
Global minimum corporate tax (OECD, 2021). The 15% global minimum, agreed by roughly 140 countries, is the most ambitious recent reform. It lets countries "top up" the tax of large multinationals taxed below 15%, and has applied since 2024 in several dozen jurisdictions, including most of the EU. The United States never legislated it; in January 2025 the new administration declared that the deal had "no force or effect" there. After a G7 understanding in June 2025, the OECD's Inclusive Framework agreed on January 5, 2026 to a "side-by-side" deal exempting US-parented groups from the rules that let other countries top up their tax, since US minimum taxes apply; local top-up taxes on their subsidiaries remain. The US Treasury calls this respect for tax sovereignty; the EU Tax Observatory had estimated in 2023 that exemptions had already halved the tax's expected revenue.
Beneficial-ownership transparency has moved both ways. The UK has tightened Companies House rules. The EU's top court ruled in 2022 that registers open to anyone breach privacy rights; EU rules from 2024 give access to those with a "legitimate interest," such as journalists. In March 2025 the United States exempted all US-formed companies from reporting their owners under the Corporate Transparency Act, and a final rule made that permanent in August 2026. The general direction is toward more transparency than 20 years ago, with substantial remaining gaps.
The paths from here
Dated September 2026, with US-parented groups exempt from the global minimum tax's main rules and UN tax talks continuing without the United States. The future of the offshore system depends on whether governments coordinate further or whether competitive pressure pulls back toward looser rules.
Gradual continued tightening
The combination of OECD coordination, beneficial-ownership rules, and continued public-pressure-after-leaks slowly closes specific structures while new ones replace them. The overall picture improves modestly over a decade. This remains the most likely trajectory, though less certain for corporate tax since the 2026 US exemption.
Geopolitical fragmentation reverses progress
US-China tension, sanctions disputes, and competing regulatory blocs mean that international tax coordination unravels. Each major power builds its own preferred regime; offshore structures shift toward jurisdictions aligned with each. Total transparency may decrease. Early signs: in 2025 the United States left the OECD deal and the UN talks and stopped collecting ownership data on US-formed companies.
Crisis-driven reform spike
A high-profile leak, scandal, or fiscal crisis produces political pressure for sharp reform. Specific jurisdictions or specific structures are targeted hard. Revenue rises modestly; the structures adapt over the following decade. In France, fiscal pressure brought the "Zucman tax," a 2% minimum tax on fortunes above €100 million, to votes in 2025; it did not become law.
Sanctions-driven decoupling produces parallel offshore systems
As Western sanctions push Russian, Chinese, and other non-aligned wealth out of the dollar system, parallel offshore structures form in jurisdictions that operate outside Western reach (Hong Kong, UAE, parts of Asia). The total volume of offshore activity does not decrease; its geography changes. Switzerland's share of offshore wealth management has already fallen from almost half before 2008 to about a fifth, as Singapore and Hong Kong gained (EU Tax Observatory).
Where serious analysts disagree
Honest scholarly disagreement on offshore is wider than the public conversation suggests. The named voices below represent positions held by serious researchers whose work is worth engaging directly.
Offshore is central to rising inequality and needs major reform
Tax havens are central to the post-1980 rise in wealth concentration. Without effective international coordination on minimum taxes, beneficial ownership, and enforcement against ultra-high-net-worth tax avoidance, the trajectory of inequality continues. Serious reform requires coordinated multilateral action.
Held by: Gabriel Zucman (Berkeley/Paris School of Economics), Thomas Piketty, Emmanuel Saez, Joseph Stiglitz, and the broader inequality-economics community. Their estimates are the most widely used in the field; Blouin and Robinson dispute the profit data, and Auten and Splinter the US inequality series.
Offshore is mostly legitimate cross-border finance with abuses to be policed
Most offshore activity serves real economic functions: cross-border investment coordination, neutral arbitration, estate planning, risk management. Abuses exist and should be policed, but treating the entire system as illegitimate misreads what most of it does. Reform should target abuses, not the underlying structure.
Held by: parts of the international tax-policy community, the Cayman and Singapore financial-services industries' published research, and economists focused on the efficiency benefits of cross-border capital mobility. One of them, James Hines, argues that havens can also benefit other economies. The case has merits on the legitimate-uses side and weaknesses on how much abuse is incidental versus structural.
The rich world is the real tax haven
Focus on tropical-island jurisdictions misdirects attention. Switzerland, Luxembourg, Ireland, the Netherlands, the UK, and the US are the largest enablers of offshore activity. Reform that targets small jurisdictions while leaving large ones in place produces little net effect. The EU's list of non-cooperative tax jurisdictions (February 2026) names seven small islands and territories plus Panama, Russia, and Vietnam. The political difficulty is that the largest enablers are the same countries running the reform processes.
Held by: Nicholas Shaxson ("Treasure Islands"), the Tax Justice Network, and a strand of NGO and journalistic research. Their geographic data on where offshore activity actually concentrates is solid; the political analysis is partly contested.
Kleptocracy is the most consequential offshore use, not corporate tax
The largest moral and geopolitical stakes in offshore involve authoritarian elites moving wealth out of their home countries through Western legal infrastructure. London property, New York real estate, Swiss banks, and Caribbean trusts are how kleptocratic wealth becomes legitimate. Anti-money-laundering and beneficial-ownership reforms should focus here.
Held by: Sarah Chayes, Bill Browder, Anne Applebaum, the Hudson Institute Kleptocracy Initiative, and a community of Russia and Africa researchers. Their case has been strengthened by post-2022 sanctions enforcement, which exposed how much Russian wealth had been welcomed into Western structures.
Reform optimism is overstated; the system adapts faster than rules
Each round of reform - FATCA, BEPS, beneficial ownership, the global minimum tax - has produced visible compliance changes and modest revenue gains. The structures adapt within a few years. Without much more aggressive change than is politically available, the offshore system continues to function approximately as before. Pessimism about reform is empirical, not cynical.
Held by: Brooke Harrington (Dartmouth, "Capital Without Borders"), parts of the academic critical-tax community, and journalists who have covered multiple reform cycles. The evidence cuts both ways: hidden bank accounts have fallen sharply, while estimates of corporate profit shifting show little change.
What the available evidence supports: the offshore system is real and large, and it serves a mix of legitimate and abusive purposes. Automatic exchange of bank data sharply cut hidden personal accounts; estimates of corporate profit shifting remain high and disputed. The largest enablers are the world's major financial centers rather than tropical islands. Whether tax competition helps or harms on balance is not settled. Further coordination depends on the largest economies, and since 2025 the largest of them has stepped back from it.
What this means for you
Most readers do not have direct exposure to offshore structures. Some practical implications nonetheless apply.
If you follow inequality debates
Standard inequality statistics under-count wealth held offshore by a substantial margin. Estimates that include offshore holdings (Zucman's, primarily) tend to show concentration higher than headline numbers suggest. When you see a debate framed as "the rich already pay X% of taxes," it is worth knowing whether the underlying data captures offshore-held wealth; with large estimates of hidden wealth, it is worth knowing what they assume.
If you live in or near a major financial center
Local property markets in London, New York, Vancouver, Sydney, Toronto, Singapore, and a few others are partly priced by offshore demand. Anti-money-laundering and beneficial-ownership reforms have started to affect this, but the price levels established over decades persist. Housing affordability debates in these cities are partly debates about offshore wealth, even when the connection is not made explicit.
If you invest in markets
Many of the funds you may invest in are domiciled offshore for legitimate reasons. This is not in itself a sign of anything wrong. Distinguishing fund-domicile reasons from individual-tax-avoidance reasons is one of the more useful financial-literacy skills, and is largely absent from popular financial education.
If you read journalism on tax leaks
Coverage of leaks like Pandora and Panama tends to focus on the most visible names rather than the structural pattern. The systemic story - what does the leak reveal about the rules as a whole - is often more important than the celebrity stories that draw attention. The journalist consortia behind them publish methodology notes that are worth reading alongside the headlines.
If you vote on tax policy
A country acting alone faces capital flight; a coordinated change across major economies is harder to escape. The case against such coordination, made by the US government when it left the OECD deal and the UN talks, is that common rules limit each country's fiscal choices. Either way, a proposal that ignores how mobile the tax base is misses part of the problem.
