Controlled Foreign Company Rules in Ireland: Revenue Guide

Ireland's controlled foreign company (CFC) rules are an anti-abuse measure aimed at the artificial diversion of profits from an Irish controlling company to an offshore entity. They are in Part 35B of the Taxes Consolidation Act 1997 and implement the EU Anti-Tax Avoidance Directive (ATAD). This guide explains the concepts and the outline of the charge for finance directors, tax teams and advisers, including those in Dublin-based groups. It is general information, not tax advice. CFC rules work alongside other anti-avoidance provisions; see our guide to the general anti-avoidance rule (GAAR) for the wider context.

What the rules are for

Revenue's page on CFC rules (published 23 June 2026) says the rules prevent the artificial diversion of profits from controlling companies to CFCs. It describes CFCs as offshore entities in low-tax or no-tax jurisdictions. The rules attribute a CFC's undistributed income to the controlling company, or a connected company, in the State where the income arises from non-genuine arrangements put in place for the essential purpose of obtaining a tax advantage. The page says the legislation applies to accounting periods of controlling companies commencing on or after 1 January 2019.

Revenue's Tax and Duty Manual Part 35b-01-01 (last updated January 2025) adds that the rules implement Articles 7 and 8 of the ATAD. Revenue may have updated its guidance since, so check the current version.

What is a CFC?

The manual defines a CFC as a non-resident company controlled by one or more companies resident in the State (the controlling companies). Control is tested by reference to holdings, directly or indirectly, in terms of:

• a majority of issued share capital or voting power;
• more than 50% of distributable income on a total distribution;
• more than 50% of distributable assets on a winding up or redemption; or
• enough shares to control the composition of the board.

The manual says rights of associated companies are attributed to the controlling company for control purposes. It also sets out an order of tests for deciding where a company is resident, starting with any double tax treaty. For the exact tests, read the manual and the legislation.

What the Directive says

The text of Council Directive (EU) 2016/1164 on EUR-Lex, in Article 7, treats an entity as a controlled foreign company where the taxpayer, alone or with associated enterprises, holds more than 50% of voting rights, capital or profits, and the tax actually paid is lower than the tax that would have been charged under the taxpayer's own Member State rules. Article 7(2)(b) refers to non-distributed income from arrangements put in place for the essential purpose of obtaining a tax advantage. Article 8 limits the attribution to amounts generated through assets and risks linked to significant people functions carried out by the controlling company, following the arm's length principle. The Irish manual uses the same "essential purpose" and "significant people functions" language.

How the charge works in outline

The manual says a charge can arise on the CFC's undistributed income attributable to "relevant Irish activities". It lists conditions that must all apply, in summary:

• the CFC is resident outside Ireland and controlled by an Irish-resident company;
• relevant Irish activities are performed in the State by the controlling company or a connected company;
• the arrangements are non-genuine and were put in place for the essential purpose of securing a tax advantage;
• the transfer pricing rules do not apply and the arrangements are not at arm's length; and
• no exemption applies.

Revenue's page identifies relevant Irish activities as significant people functions (SPFs) and key entrepreneurial risk-taking functions (KERTs). The manual says an arrangement is non-genuine to the extent the CFC would not own the assets or bear the risks generating the income but for the Irish SPFs. It describes the "essential purpose" test as narrower than the "main purpose or one of the main purposes" test used elsewhere, and says the test asks whether securing a tax advantage was the decisive factor.

Undistributed income

The manual describes undistributed income as distributable profits less relevant distributions. Distributable profits are limited to the profits attributable to the Irish SPF activities. The manual says a loss period produces no charge.

Exemptions and reliefs

The manual's contents list several exemptions: a low profit margin exemption, a low accounting profit exemption, a one-year exempt period for newly acquired CFCs and an effective tax rate exemption. It also says the transfer pricing and arm's length position can take an arrangement outside the charge. The manual says these exemptions are modified or unavailable for CFCs resident in EU-listed non-cooperative jurisdictions.

This guide does not give the thresholds for these exemptions, as they are not covered here; check the current manual. On reliefs, the manual says a credit is given for tax paid by the CFC on the same income, and describes relief for certain distributions and for disposals of shares or securities in a CFC.

The link to the participation exemption

The manual notes that where the participation exemption for qualifying foreign distributions (section 831B) is claimed, the distribution does not reduce undistributed income. Revenue's separate manual on that exemption says CFC undistributed income relief is restricted where no claim is made. If your group has both foreign subsidiaries paying dividends and CFC exposure, consider the two regimes together.

Practical points for finance teams

Our suggestion: for each foreign subsidiary, keep a short file recording where key decisions, staff and risk management actually happen, who owns the assets that generate the income, and the commercial reasons for the structure. That documents the substance questions the manual asks. Where intragroup pricing is involved, our transfer pricing guide for finance and tax professionals covers that adjacent area. A practical approach: review the structure whenever a foreign entity is acquired, restructured or changes its activities, and keep compliance generally in order; a tax clearance certificate is a separate topic, explained in our guide to tax clearance certificates for Irish businesses.

What this guide does not cover

This guide does not cover rates of tax, the thresholds in the exemptions, the computation of chargeable income, return and filing requirements or the detail of each section. Always read the current Revenue manual and the legislation.

Learnsignal's offices are off Baggot Street in Dublin, and we offer in-person training from there. For current details, see our CPD pages.

Frequently asked questions

Does every foreign subsidiary count as a CFC?

No. The manual defines a CFC as a non-resident company controlled by one or more Irish-resident companies, and a charge only arises where the other conditions, including non-genuine arrangements and relevant Irish activities, are met.

What are significant people functions?

The manual and Revenue's page refer to SPFs and KERTs performed in Ireland, and ask whether the CFC would own the assets or bear the risks without those Irish functions.

Is the essential purpose test the same as a "main purpose" test?

No. The manual says securing a tax advantage must be the decisive factor and describes this as narrower than a "main purpose or one of the main purposes" test.

Do the CFC rules apply to periods before 2019?

Revenue's page says the legislation applies to accounting periods of controlling companies commencing on or after 1 January 2019.

Tax rules change, so treat this as a starting point and confirm the position with Revenue's current guidance or your tax adviser.