The Double Irish Arrangement is a tax avoidance strategy that U.S. based multinational corporations use to lower their income tax liability. The idea is to use payments between related entities in a corporate structure to shift income from a higher-tax country to a lower-tax country. It relies on the fact that Irish tax law does not include U.S. transfer pricing rules.[1]

Typically, the company arranges for the rights to exploit intellectual property outside the United States to be owned by an offshore company. This is achieved by entering into a cost sharing agreement between the U.S. parent and the offshore company, in the terms of U.S. transfer pricing rules. The offshore company continues to receive all of the profits from exploitation of the rights outside the U.S., without paying U.S. tax on the profits unless and until they are remitted to the U.S.[2] It is called "The Double Irish" because it requires two Irish companies to complete the structure. The first Irish company is the offshore company which owns the valuable non-U.S. rights. This company is tax resident in a tax haven, such as Bermuda or the Cayman Islands. Irish tax law provides that a company is tax resident where its central management and control is located, not where it is incorporated, so that it is possible for the first Irish company not to be tax resident in Ireland. The first Irish company licenses the rights to a second Irish company, which is tax resident in Ireland, in return for substantial royalties or other fees. The second Irish company receives income from exploitation of the asset in countries outside the U.S., but its taxable profits are low because the royalties or fees paid to the first Irish company are deductible expenses. The remaining profits are taxed at the Irish rate of 12.5%. For companies whose ultimate ownership is located in the United States, the payments between the two related Irish companies might be non-tax-deferrable and subject to current taxation as Subpart F income under the Internal Revenue Service's Controlled Foreign Corporation regulations if the structure is not set up properly. This is avoided by organizing the second Irish company as a fully owned subsidiary of the first Irish company resident in the tax haven, and then making an entity classification election for the second Irish company to be disregarded as a separate entity from its owner, the first Irish company. The payments between the two Irish companies are then ignored for U.S. tax purposes.[1] [edit]