The Double Irish with a Dutch Sandwich was a corporate tax avoidance structure that let major multinationals push their effective tax rate on foreign profits close to zero by routing money through two Irish subsidiaries and a Netherlands conduit company. It worked because of a mismatch between countries’ tax residency rules, and it no longer works: Ireland closed the loophole in 2014, remaining users had to unwind by the end of 2020, and a mix of U.S. legislation and the OECD’s global minimum tax has removed most of what made it valuable.
How the Two Irish Companies Worked Together
The structure hinged on a peculiarity of Irish law. Before 2015, Ireland decided a company’s tax residency by where its central management and control sat, not where it was incorporated.1Revenue Irish Tax and Customs. Company Residency Rules A multinational could set up an Irish company, then hold board meetings and make strategic decisions in Bermuda or the Cayman Islands. On paper the company was Irish. For tax purposes it was resident in a haven.2Organisation for Economic Co-operation and Development. Ireland – Information on Residency for Tax Purposes
That first Irish company held the intellectual property rights for markets outside the United States. Because it was treated as resident in a zero-tax jurisdiction, profits it received faced little or no tax.
A second Irish subsidiary ran the real business inside Ireland, employing staff and booking sales. It was an ordinary Irish tax resident, subject to the country’s 12.5% rate on trading income.3Revenue Irish Tax and Customs. Corporation Tax (CT) The savings came from what passed between the two. The operating company paid large royalty fees to the haven-resident company for the right to use the intellectual property. Those royalties were deductible business expenses that shrank the operating company’s Irish taxable profit, and the same money reappeared in a jurisdiction that barely taxed it.
Where the Dutch Company Fit In
Sending royalties directly from an Irish operating company to an entity in a tax haven would normally have triggered Irish withholding tax. To avoid that, multinationals inserted a Netherlands company between the two Irish entities. The Dutch subsidiary collected royalties from the Irish operating company and forwarded them on to the haven-resident Irish company.
Two features of European tax law made this painless. The EU Interest and Royalties Directive eliminated withholding tax on cross-border royalty payments between associated companies inside the EU, so the payment from Ireland to the Netherlands moved tax-free.4Taxation and Customs Union. Interest and Royalty Directive The Netherlands did not levy withholding tax on outbound royalty payments either, so the onward transfer to the haven also went untaxed. The Dutch company kept a small administrative fee. It existed to make the plumbing work.
The end result was a three-step flow. Worldwide customer payments landed in the Irish operating company, moved to the Dutch conduit, then reached the haven-resident Irish company, with almost no tax collected at any border.
Why Intellectual Property Was the Engine
None of this worked without intangible assets to price. The haven-resident Irish company owned rights to software, patents, trademarks, or similar assets and licensed them to the operating subsidiary. The license fees were the mechanism that drained profit out of the taxable company and into the untaxed one. Irish law allowed deductions for expenses incurred wholly and exclusively for trading purposes, so the royalties reduced the operating company’s taxable income almost dollar for dollar.3Revenue Irish Tax and Customs. Corporation Tax (CT)
Intangible assets are hard to price. A proprietary algorithm has no observable market rate, so the “right” royalty fee is largely a matter of judgment. Companies could set royalties high enough to absorb most of the operating company’s profits without an obvious anomaly. Modern transfer pricing rules require intercompany transactions to reflect what unrelated parties would agree in comparable circumstances, but enforcement was thin during the years the structure thrived.
The Scale of the Savings
The numbers were large. A 2012 U.S. Senate investigation found Apple had avoided roughly $9 billion in U.S. taxes in a single year through offshore subsidiaries with no tax home. Google shifted $15.5 billion to offshore entities in 2015 alone, saving an estimated $3.6 billion in tax that year. Facebook routed more than $700 million to the Cayman Islands through a similar arrangement.
The most consequential response came from the European Commission, which ruled in 2016 that Ireland had granted Apple illegal state aid through favorable tax rulings. The Commission found Apple’s effective corporate tax rate on European profits had fallen to 1% in 2003 and to 0.005% by 2014. Ireland was ordered to recover up to €13 billion in unpaid taxes, plus interest.5European Commission. Ireland Gave Illegal Tax Benefits to Apple Worth Up to 13 Billion Euro Structures that were technically legal under domestic law could still breach EU rules on competition and state aid.
Why It No Longer Works
Ireland’s Finance Act 2014 rewrote the residency rule at the center of the arrangement. Any company incorporated in Ireland is now treated as an Irish tax resident. Incorporating in Ireland while claiming management and control from Bermuda is no longer possible, with a narrow exception for companies that qualify as tax residents of a treaty partner country under a double taxation agreement.6Revenue Commissioners. Company Residence in the State
Ireland gave existing structures a transition. Companies incorporated before January 1, 2015, could continue under the old rules until December 31, 2020, provided ownership and business character stayed broadly the same.6Revenue Commissioners. Company Residence in the State That sunset date was the definitive end of the Double Irish.
Alongside Ireland’s reform, the OECD’s Base Erosion and Profit Shifting project, endorsed by G20 finance ministers in 2015, produced 15 action items aimed at profit shifting.7Organisation for Economic Co-operation and Development. BEPS Action 5 on Harmful Tax Practices – Transparency Framework Peer Review Documents The most consequential piece for these structures is country-by-country reporting: multinational groups with consolidated revenue of at least €750 million must now file annual reports disclosing revenue, profits, taxes paid, and headcount in every jurisdiction where they operate.8OECD. Country-by-Country Reporting for Tax Purposes A shell company collecting billions in royalties in the Cayman Islands is now visible to tax authorities on the face of a required filing.
How U.S. Law Changed the Incentives
Before the 2017 Tax Cuts and Jobs Act, the United States taxed corporate income at a top federal rate of 35%, but only when the money came home.9U.S. GAO. Corporate Income Tax: Effective Rates Before and After 2017 Law Change That deferral was the whole reason offshore parking structures existed. The 2017 law hit the problem from two directions.
Section 951A of the Internal Revenue Code requires U.S. shareholders of controlled foreign corporations to include their share of the subsidiary’s tested income in their U.S. taxable income every year, whether or not the profits are repatriated.10Office of the Law Revision Counsel. 26 USC 951A – Net CFC Tested Income Included in Gross Income of United States Shareholders Originally called Global Intangible Low-Taxed Income (GILTI), the provision was renamed Net CFC Tested Income for tax years beginning after December 31, 2025. Corporate shareholders take a 40% deduction under Section 250, producing an effective federal rate of roughly 12.6%.11Office of the Law Revision Counsel. 26 USC 250 – Foreign-Derived Deduction Eligible Income and Net CFC Tested Income That rate leaves normal foreign operations alone while eliminating the reward for parking profits in a zero-tax haven.
The Base Erosion and Anti-Abuse Tax (BEAT) targets the other side of the flow: deductible payments from U.S. corporations to foreign affiliates. Under Section 59A, a corporation with average annual gross receipts of at least $500 million and base erosion payments exceeding 3% of its total deductions must calculate an alternative minimum tax.12Office of the Law Revision Counsel. 26 USC 59A – Tax on Base Erosion Payments of Taxpayers With Substantial Gross Receipts If its regular tax falls below the BEAT calculation, which adds back deductible payments to foreign related parties, the company pays the difference.13Internal Revenue Service. IRC 59A Base Erosion Anti-Abuse Tax Overview A large U.S. company cannot wipe out its domestic tax bill by paying royalties or interest to an offshore subsidiary.
The Global Minimum Tax
The most ambitious response is the OECD’s Pillar Two framework, which sets a global minimum effective tax rate of 15% for multinational groups with consolidated revenue of at least €750 million. The Global Anti-Base Erosion (GloBE) Rules impose a top-up tax whenever the group’s effective rate in any jurisdiction falls below 15%.14OECD. Global Anti-Base Erosion Model Rules (Pillar Two) If a subsidiary is taxed at 5% in one country, the parent’s home jurisdiction collects the remaining 10%.
As of early 2026, 147 members of the OECD’s Inclusive Framework have agreed to the rules, and dozens of jurisdictions have enacted implementing legislation, including EU member states, the United Kingdom, Canada, and Australia.15PwC. Pillar Two Country Tracker Ireland now applies a 15% effective rate for in-scope multinationals while keeping the 12.5% trading rate for smaller companies below the €750 million threshold.16Department of Finance. Minister McGrath Notes Ireland’s Application of Effective 15% Corporation Tax Rate for In-Scope Businesses Profit shifting is not impossible under Pillar Two, but the benefit is capped. A haven offering 0% is no longer meaningfully different from one offering 14%, because the top-up tax closes the gap.
What Multinationals Use Now
When Ireland shut down the residency mismatch, companies did not accept higher tax bills without adjustment. Many moved to what practitioners call a Green Jersey structure, which keeps intellectual property in Ireland and uses capital allowances rather than royalty payments to reduce taxable income. A company transfers IP into an Irish subsidiary and claims deductions for the cost of acquiring the intangible assets. For expenditure incurred after October 2017, the total deduction from capital allowances and related interest in a year is capped at 80% of the trading income from the relevant activity.17Revenue Commissioners. Capital Allowances for Intangible Assets
The Green Jersey is a milder tool. Profits stay in Ireland and are taxed there, though the allowances push the effective rate below the headline 12.5%. It also operates under far more scrutiny than its predecessor: country-by-country reporting shows tax authorities exactly where profits are booked, transfer pricing rules require arm’s-length pricing between related parties, and for the largest groups Pillar Two sets a floor no structure can breach. The era of routing profits through letterbox companies in three countries to reach a near-zero rate is over.