The Double Irish tax scheme was a corporate structure that let multinational companies, most famously large US technology firms, cut their foreign tax bills to near zero by routing profits through two Irish subsidiaries and out to a tax haven. It relied on a mismatch between how Ireland and the United States decided where a company “lived” for tax purposes, combined with internal royalty payments on intellectual property. Ireland legislated the arrangement out of existence in 2014, grandfathered structures had until December 31, 2020 to unwind, and a stack of newer rules now blocks the mechanics from being rebuilt.
How the Two-Company Structure Worked
The scheme needed two Irish companies inside the same corporate group, each doing a different job.
The first company was the operating face of the business in Europe, Asia, and other non-US markets. It booked the revenue from customers buying software licenses, advertising, or other services. On its own, it looked highly profitable. But it paid enormous royalty and licensing fees to the second Irish company for the right to use the group’s intellectual property, and those fees consumed almost all its revenue. Very little taxable profit was left behind in Ireland.
The second company was where the plan came together. It was incorporated in Ireland, but its board met and its real decisions were made in a tax haven such as Bermuda or the Cayman Islands. It held the group’s intellectual property, collected the royalties, and, because of how the residency rules lined up, paid tax to no one.
The intellectual property piece is what made the internal payments believable. Software code, patents, brand names, and proprietary algorithms were transferred to the second Irish company early, before they generated significant revenue, so the transfer value could be characterized as low. Once the IP sat with that entity, the first company genuinely needed a license to sell products built on it, and the royalty payments it made were deductible business expenses. Revenue shrank on the taxable side. Profit accumulated on the untaxed side.
The Residency Mismatch That Made It Possible
The whole structure rested on a gap between two definitions of corporate residence.
The United States treats a company as a resident of whichever country granted its charter. A company incorporated in Ireland is Irish, as far as the US is concerned, and the US does not tax it as a domestic corporation. Ireland, historically, looked at something different: where the company was actually managed and controlled.1Irish Tax and Customs. Company Residence in the State A company set up in Dublin but run by directors gathering in Bermuda was not, under the old Irish rules, an Irish tax resident.
So the US said the company was Irish and did not tax it. Ireland said the company was not Irish and did not tax it. The tax-haven jurisdiction where the board actually met imposed no corporate income tax to begin with. The company was effectively stateless for tax purposes, and the royalty income landing in its accounts was untouched.
The Dutch Sandwich
Many groups added a Dutch subsidiary in the middle, producing the arrangement often called a “Double Irish with a Dutch Sandwich.” The reason was narrow: avoiding Irish withholding tax on outbound royalty payments.2Revenue. Withholding Tax on Interest Payments and Royalty Payments A direct royalty from the first Irish company to the second (which was, for Irish purposes, a non-resident) would have triggered that tax.
The EU’s Interest and Royalties Directive eliminated withholding taxes on royalty payments between associated companies in different member states.3EUR-Lex. Council Directive 2003/49/EC Both Ireland and the Netherlands were members, so the first Irish company could pay royalties to a Dutch subsidiary tax-free. The Dutch company then forwarded the money to the second Irish company in the tax haven, and Dutch law at the time imposed minimal tax on the outbound leg. The money passed through cleanly.
Who Used It and How Much Was at Stake
The Double Irish was not a fringe strategy. It was standard practice among the largest US technology firms selling into Europe, and the scale was substantial.
Apple’s arrangement drew the sharpest public attention. In 2016, the European Commission concluded that Ireland had granted Apple illegal tax benefits and ordered the company to repay up to €13 billion in back taxes. The Commission found that Apple’s effective tax rate on its European profits had fallen as low as 0.005 percent in some years.4European Commission. Ireland Gave Illegal Tax Benefits to Apple Worth Up to EUR 13 Billion The EU’s Court of Justice ultimately upheld the ruling, and Apple paid roughly €14 billion including interest. Google, using a similar structure, had accumulated $58.3 billion in offshore earnings by the end of 2015 on which it paid no US taxes. Other technology and pharmaceutical companies ran variations of the same arrangement.
How and When It Ended
Ireland closed the gap through the Finance Act 2014. Section 43 rewrote the corporate residency rules so that any company incorporated in Ireland is treated as an Irish tax resident, no matter where its management sits.5Irish Statute Book. Finance Act 2014, Section 43
The new rule took effect on January 1, 2015 for newly incorporated companies. Existing structures got a transition window: companies incorporated before that date could keep their arrangements running until December 31, 2020, unless a change of ownership combined with a major change in business operations triggered an earlier cutoff. When the window closed at the end of 2020, the Double Irish was finished as a legal strategy.
Irish reform did not happen in isolation. The OECD’s Base Erosion and Profit Shifting project, which published 15 action items in October 2015, drew agreement from 139 countries on minimum standards targeting harmful tax practices, treaty abuse, and country-by-country reporting. The specific mismatches the Double Irish exploited were squarely in the project’s sights.
Why It Cannot Easily Come Back
Even setting Ireland’s residency fix aside, the surrounding rules have changed enough that the mechanics no longer add up.
The United States built its own defenses into the Tax Cuts and Jobs Act of 2017. The Global Intangible Low-Taxed Income provision, originally at 26 U.S.C. § 951A and recently renamed “net CFC tested income,” taxes US shareholders on foreign subsidiary earnings that exceed a 10 percent return on the subsidiary’s tangible assets, on the theory that unusually high returns signal profits attributable to intellectual property shifted offshore.6Office of the Law Revision Counsel. 26 USC 951A – Net CFC Tested Income Included in Gross Income of United States Shareholders The effective rate on those earnings is scheduled to reach roughly 16.4 percent in 2026. The Base Erosion and Anti-Abuse Tax under 26 U.S.C. § 59A imposes an alternative minimum tax on large corporations that make significant deductible payments to foreign affiliates, at a 2026 rate of 12.5 percent.7Office of the Law Revision Counsel. 26 USC 59A – Tax on Base Erosion Payments of Taxpayers With Substantial Gross Receipts Between them, the old play of licensing IP to a shell company and deducting the royalties is far more expensive.
The OECD’s Pillar Two framework goes further. It sets a global minimum effective tax rate of 15 percent for multinational groups with consolidated revenues of €750 million or more.8Revenue. What Are the Pillar Two Rules? Ireland transposed the rules into domestic law, with the Income Inclusion Rule and a domestic top-up tax taking effect on January 1, 2024, and the Undertaxed Profits Rule on January 1, 2025. If an in-scope company still manages to park profits in a zero-tax jurisdiction, another country can impose a top-up tax to bring the rate up to 15 percent.
The Netherlands closed its side too. Dutch law now imposes a 25.8 percent conditional withholding tax on royalty payments made to affiliated entities in designated low-tax jurisdictions, with an anti-abuse rule extending the tax to artificial arrangements designed to sidestep it. The conduit that used to carry royalties through Amsterdam untouched would now be taxed heavily on the way out. The specific combination of loopholes the Double Irish depended on has been dismantled from every side.