CFC Rules Explained: When Your Parent Country Taxes You on Foreign Profits

Controlled Foreign Company (CFC) rules are the parent-country mechanism for taxing income earned by foreign subsidiaries — even when that income is never distributed back. A CFC rule looks past the legal entity and attributes profits directly to the resident shareholder, taxing them as if they had received those profits personally. Get CFC analysis wrong and an otherwise-substance-compliant offshore structure produces no tax saving at all: the offshore jurisdiction’s preferential rate is irrelevant if the parent country taxes the income anyway.

This guide walks through how CFC rules work in the major high-tax parent jurisdictions whose residents most often run offshore structures: the US (Subpart F + GILTI), the UK, EU members (under ATAD), Australia, and Canada. It is the companion to the substance requirements guide: substance is what you do in the offshore jurisdiction, CFC is what the parent country does back to you. Get either wrong and the structure fails.

The basic shape of a CFC rule

Most CFC regimes share the same skeleton:

1. Ownership/control trigger: the parent country’s rules apply if a resident shareholder (or group of related resident shareholders) holds above a threshold percentage of a foreign company. The US uses ≥10% (originally 50% for the corporation as a whole; reduced by TCJA), the UK and most EU members use a 25-50% range, Australia uses ≥1% if a group of Australian residents collectively holds ≥50%.
2. Low-tax foreign jurisdiction: the rules typically apply only if the foreign subsidiary’s effective tax rate is below a threshold — often half the parent rate or a fixed percentage. EU ATAD uses a 50%-of-parent test; Australia uses a "broad exemption listed country" carve-out for high-tax peers.
3. Passive or "tainted" income test: CFC attribution typically applies to passive categories (dividends, interest, royalties, rents) and certain "base-eroding" active categories (intra-group services, finance, IP). Genuine active business income is often exempt.
4. Annual attribution: qualifying income is attributed to the resident shareholder annually and taxed at parent-country rates, regardless of actual distribution.

The specifics — thresholds, exemptions, calculation mechanics — vary materially by jurisdiction. The five regimes covered below are the ones most likely to bite for TaxAtlas-audience users.

US: Subpart F + GILTI

The US has the most sophisticated and aggressive CFC regime in the OECD, and it applies to US citizens and resident aliens regardless of where the shareholder physically lives. This is critical: a US-citizen founder living in Dubai still faces US Subpart F and GILTI on a UAE Free Zone company they own.

Subpart F (the original CFC rule, since 1962)

Subpart F attributes specific passive-income categories of a CFC’s earnings to the US shareholder annually:

• Foreign Personal Holding Company Income (FPHCI): dividends, interest, royalties, rents, capital gains on investment property.
• Foreign Base Company Sales Income: income from buying/selling goods where the transaction is structured through a low-tax jurisdiction to shift profits away from the source.
• Foreign Base Company Services Income: services performed for related parties outside the country of incorporation.
• Insurance Income: from insuring risks outside the country of incorporation.

A CFC is a foreign corporation where US shareholders (≥10% owners) collectively hold more than 50% of vote or value. The US shareholder threshold of ≥10% means even a minority US-citizen partner in a foreign company can trigger CFC status if combined US shareholdings exceed 50%.

GILTI (Global Intangible Low-Taxed Income, since 2017)

The TCJA introduced GILTI as a parallel — and much broader — current-tax regime. GILTI captures most active business income of a CFC that exceeds a 10% routine return on tangible asset basis (the Qualified Business Asset Investment, or QBAI). The aim was to deter shifting of IP and high-margin businesses to low-tax jurisdictions.

Mechanics for individual US shareholders:

• GILTI is computed at the CFC group level and attributed to the US shareholder annually.
• Effective US rate on GILTI for individuals: roughly 23.8% (37% top federal rate on net GILTI, less foreign tax credit where available; without an FTC the rate is closer to 37%).
• For US C-corporations, Section 250 provides a 50% deduction on GILTI, producing an effective rate of ~10.5% (before FTC).
• Individual US shareholders can elect §962 to be taxed as if they were a C-corp for GILTI purposes — usually beneficial when the CFC operates in a meaningful-tax jurisdiction with FTC available.

GILTI was preserved unchanged by the One Big Beautiful Bill Act (4 July 2025) — the broader TCJA permanence package did not modify the international provisions. For US-citizen founders, GILTI is the binding constraint on most offshore structures. The historical "incorporate in a 0% jurisdiction" play produces ~10.5% effective US tax for C-corp owners and ~23.8% for individual owners electing §962, plus the underlying foreign tax. Pre-TCJA structures that deferred US tax indefinitely no longer work.

Subpart F + GILTI together

The two regimes overlap. Subpart F runs first; income captured by Subpart F is excluded from GILTI to avoid double inclusion. The practical effect: passive income hits at ordinary rates (Subpart F), active income hits at the GILTI rate. Very little CFC income escapes both.

See the US-citizen moving-abroad guide for how GILTI shapes the US-citizen offshore playbook.

United Kingdom: CFC rules (Taxation (International and Other Provisions) Act 2010, Part 9A)

UK CFC rules apply to a UK-resident company that controls (directly or indirectly) a foreign subsidiary whose profits would, if taxed in the UK, be liable to UK corporation tax. The structure is "gateway"-based:

1. Entity-level exemptions: if the CFC meets specific safe-harbour tests (excluded territories, low-profit threshold, low-profit-margin, tax exemption), the rules don’t apply at all.
2. Chapter 4 trading gateway: if the CFC’s profits are from genuine UK-managed trade, an apportionment based on UK Significant People Functions (SPFs) determines the chargeable portion.
3. Chapter 5-9 categories: specific charging gateways for non-trading finance profits, trading finance profits, captive insurance, solo consolidation, and other carve-out categories.

UK CFC rules apply to UK-resident companies, not individuals. UK-resident individual shareholders of foreign corporations are not directly caught by UK CFC rules but face transfer-of-assets-abroad rules (TOAA) and other anti-avoidance provisions that achieve similar effects in specific cases.

For founders running UK companies with foreign subsidiaries, the binding question is usually the Chapter 5 finance-company gateway: foreign-finance-company structures that route group finance through low-tax jurisdictions often trigger the UK CFC charge.

EU: ATAD CFC rules

The Anti-Tax Avoidance Directive (ATAD) required all EU members to enact CFC rules from 2019 onward. ATAD provides two model options that member states can choose between:

• Option A (transactional approach): attribute specific categories of "non-genuine" income to the parent — dividends, interest, royalties, rents, intra-group services where the CFC is a low-tax jurisdiction and the income would be captured under the home country’s anti-avoidance principles.
• Option B (entity approach): attribute all of the CFC’s undistributed income when the local effective tax rate is less than half the parent rate AND the CFC fails a "substantive economic activity" test.

Member-state implementations:

• Germany: historical CFC rules under §§ 7-14 AStG. Apply to German residents (corporate or individual) holding ≥1% (≥50% group) of a "low-tax" foreign corporation (ETR < 25% historically; reformed in 2024 to align with ATAD and Pillar Two). Genuine commercial activity exception available, with substance test.
• France: Article 209 B of the General Tax Code. Apply when a French resident holds ≥50% of a foreign entity with an ETR < half of French CIT (currently < 12.5%). Genuine activity exception for EU/EEA entities; for non-EU/EEA, must prove the foreign entity has genuine commercial purpose.
• Spain: uses Option A approach with a list of tainted-income categories. Genuine activity exception for EU/EEA-resident CFCs.
• Italy: applies to ≥50% control of CFCs with ETR < half of Italian CIT and with predominantly passive income (≥1/3 from passive categories). Genuine economic activity exception available.
• Netherlands: CFC rules transposed under ATAD with a list of low-tax jurisdictions and a passive-income focus.

For founders who are EU-resident, ATAD CFC rules are typically the binding constraint on offshore structures that earn passive-style income. For genuine operating businesses with local substance in the foreign jurisdiction, ATAD typically provides the activity exception — but the substance bar is meaningful (see the substance guide).

Australia: CFC rules (Income Tax Assessment Act 1936, Part X)

Australian CFC rules attribute current-year income of a CFC to Australian-resident shareholders. A CFC exists where:

• ≥5 or fewer Australian residents collectively hold ≥50% (the "deemed control test"), OR
• a single Australian resident (with associates) controls the foreign company, OR
• a single Australian resident holds ≥40% and the foreign company is not controlled by unrelated parties.

Attribution mechanics:

• "Tainted income" categories (passive income, certain related-party transactions, base-eroding transactions) are attributed.
• Active business income from operations in a "broad exemption listed country" (effectively major OECD economies) is excluded.
• For CFCs in non-listed jurisdictions, attribution applies unless the active income test is met (≥95% of gross turnover from active business operations in the foreign jurisdiction).

Australian-resident shareholders of CFCs in non-listed jurisdictions (UAE, Cayman, BVI, etc.) face annual attribution of tainted income at the shareholder’s marginal rate.

Canada: FAPI (Foreign Accrual Property Income)

Canadian rules use a slightly different mechanism — FAPI — but achieve similar effects. FAPI attributes to a Canadian-resident shareholder the share of a CFC’s "investment business" or "tainted" income. A Canadian-controlled CFC exists when ≥10 Canadian residents (or 5 in some configurations) collectively control ≥50% of a foreign corporation.

FAPI applies to:

• Investment business income (passive investment, certain real-estate income).
• Sales/services income with a sufficiently base-eroding character.
• Income from certain related-party transactions.

Genuine active business income from a sufficiently-staffed foreign entity is excluded from FAPI. The bar for "sufficiently staffed" is a Canadian-specific test that has been litigated extensively.

Canadian-resident individual shareholders of CFCs face FAPI inclusion at their marginal rate; corporations face inclusion at the standard corporate rate.

The genuine commercial activity defence

Across most CFC regimes, the strongest defence is the "genuine commercial activity" or "substantive economic activity" exception. The substance bar is similar to but distinct from the substance bar in the offshore jurisdiction itself:

• The offshore jurisdiction tests substance to gate its own preferential rate (UAE QFZP, Cayman ESA, Cyprus IP Box, etc.).
• The parent country tests substance separately to exempt its CFC attribution. The same operations usually satisfy both, but not always.
• EU ATAD’s substantive-economic-activity test is broadly EU-friendly within the EU (free movement) and stricter for non-EU CFCs.
• US GILTI has no "substance exception" comparable to ATAD — even genuine active operations in a 0% jurisdiction trigger GILTI inclusion unless they generate enough QBAI to be deemed routine return.

The practical implication: a US-citizen founder running a UAE Free Zone software business with genuine UAE substance still faces GILTI on the active income. The structure works only after the founder ceases to be a US tax resident — which for US citizens means renouncing (with associated exit-tax exposure; see the exit-taxes guide).

Pillar Two intersection

Pillar Two (15% global minimum tax for MNE groups with consolidated revenue ≥ €750M) interacts with CFC rules in a specific way:

• If a CFC’s local jurisdiction already imposes a 15% QDMTT, the parent country’s IIR (Income Inclusion Rule) typically yields to the QDMTT — the local top-up tax is treated as a creditable tax for the parent country’s Pillar Two calculation.
• For sub-Pillar-Two structures (most founder-stage businesses), Pillar Two is irrelevant and CFC rules remain the binding constraint.
• For in-scope MNEs, Pillar Two effectively replaces the rate advantage that historically motivated CFC structures — the offshore subsidiary pays 15% somewhere regardless of original rate.

See the Pillar Two implementation tracker for jurisdictional status.

Practical implications by founder type

US-citizen founder running an offshore tech business: Subpart F catches passive income; GILTI catches most active income above a 10% QBAI threshold. Effective US tax on the offshore active income is ~10.5% (C-corp) or ~23.8% (individual electing §962), plus the underlying foreign tax. Pre-distribution US tax happens every year regardless of whether profits are repatriated. Renouncing citizenship is the only complete exit; FEIE shields earned income up to $132,900 (2026) but does nothing for CFC attribution.

EU-resident founder running an offshore subsidiary: ATAD CFC rules apply if the offshore jurisdiction’s ETR is < half of the parent rate AND the offshore entity earns passive or non-genuine income. The substantive-economic-activity exception is the standard defence — but the substance bar in the offshore jurisdiction must be met, AND the operations must be genuinely active rather than just routing income through the offshore entity.

UK-resident company with foreign subsidiaries: UK CFC rules check a series of gateways and exemptions. Trading subsidiaries with genuine local SPFs (Significant People Functions) generally pass; finance and IP subsidiaries face more scrutiny. UK-resident individual shareholders of foreign corporations face transfer-of-assets-abroad (TOAA) rules but not strict CFC attribution.

Australian-resident founder of a CFC in a non-listed jurisdiction: tainted income attribution annual unless the active business income test is met. UAE, Cayman, BVI all sit outside the broad exemption listed country list. Active operating businesses with genuine substance can typically pass; passive holding structures cannot.

Canadian-resident founder: FAPI captures passive/investment business income annually. Genuine active business with sufficient foreign staffing can be excluded — but the Canadian "sufficiently staffed" test is stricter than equivalent EU ATAD activity tests.

The standard structuring playbook

For founders evaluating an offshore structure, the sequence is usually:

1. Check personal residency first. If the founder is still a tax resident in a CFC parent country, the offshore structure may not work regardless of substance. Personal-residency change usually precedes offshore-structure setup.
2. Confirm parent-country CFC rules. US, UK, EU member states, Australia, Canada all have distinct rules. Verify the specific applicable thresholds (control, low-tax test, income categories) for the founder’s parent country.
3. Engineer the substance bar at both ends. Offshore-jurisdiction substance (UAE QFZP, ATAD activity exception, etc.) and parent-country exception (genuine commercial activity defence) typically share most elements but should be planned together.
4. Verify Pillar Two scope. Founder-stage businesses are sub-Pillar-Two; large MNEs face 15% effective regardless.
5. Document the active-business character. Board minutes, employment contracts, R&D documentation, operational KPIs — anything that supports the active-business / substantive-economic-activity claim.
6. File the required disclosures. Form 5471 (US), country-by-country reporting, ATAD CFC disclosures, FAPI returns — each parent country has annual reporting obligations even when no attribution results.

FAQ

For jurisdiction-specific country pages, see the dataset: United States, United Kingdom, Germany, France, Australia, Canada. The substance guide covers the offshore-jurisdiction side of the analysis. The Pillar Two tracker covers the MNE-scale minimum-tax overlay.