Controlled Foreign Companies (CFCs)

For UK businesses expanding overseas, the Controlled Foreign Companies (CFC) rules are a vital area of international tax. They determine when profits held in an overseas subsidiary can be taxed back in the UK.

What Is a Controlled Foreign Company?

A Controlled Foreign Company is a non-UK resident company controlled by UK residents. The rules exist because a group could otherwise route profits through a low-tax overseas subsidiary instead of bringing them home. What matters is who really controls the company, not simply where it is incorporated.

Why the Rules Matter

The Controlled Foreign Companies regime protects the UK tax base from artificial profit diversion. It is not designed to penalise genuine trade: most ordinary overseas activity falls outside a CFC charge, especially where the company has real substance and pays meaningful local tax.

The Main Exemptions

Several exemptions mean many subsidiaries never face a charge, including the exempt period, tax, excluded territories, and low profits exemptions. Each has detailed conditions and thresholds that are reviewed periodically, so current rules should always be checked.

How TaxDigit Can Help

Our Guildford-based team helps UK businesses structure international operations in a compliant, tax-efficient way. Get in touch to discuss how the Controlled Foreign Companies rules affect your group.

Controlled Foreign Companies: UK-Wide Support from TaxDigit

Controlled Foreign Companies rules affect groups across the United Kingdom, not just those near our Guildford head office. TaxDigit advises companies UK-wide, from owner-managed businesses to international groups, on whether an overseas subsidiary triggers a CFC charge and how to apply the available exemptions correctly.

Our chartered certified accountants help you assess control, substance and local taxation so that genuine commercial activity is protected while the UK tax base is respected. We support clients remotely and on-site, wherever they are based in the UK.

How we help with Controlled Foreign Companies

• Reviewing whether an overseas subsidiary is a Controlled Foreign Company under UK rules
• Testing eligibility for the main exemptions, including the exempt period and excluded territories
• Calculating any apportioned profits and the resulting CFC charge
• Documenting commercial substance to support your filing position
• Coordinating CFC reporting with your wider corporation tax compliance

For the official position, HMRC sets out the regime in detail in its International Manual: HMRC Controlled Foreign Companies guidance (INTM190000).

Frequently Asked Questions

What is a Controlled Foreign Company?
A Controlled Foreign Company is a non-UK resident company controlled by UK residents. The rules decide when profits in an overseas subsidiary can be taxed back in the UK.

Do the Controlled Foreign Companies rules apply to small UK businesses?
They can apply to any UK group with overseas subsidiaries, but several exemptions mean most genuine trading companies with real substance face no CFC charge.

Can TaxDigit help if I am not based in Guildford?
Yes. We act for clients UK-wide and provide Controlled Foreign Companies advice remotely as well as from our Guildford office.