Foreign Direct Investment UK: Legal Guide (2025)

Overview

Foreign direct investment, usually shortened to FDI, describes an investment made by a person or business based in one country into a business or asset located in another. The defining feature is an intention to establish a lasting interest, not simply to hold passive shares for short-term return.

In practice, that often means acquiring a controlling stake, opening a UK subsidiary, buying UK assets, or entering into a joint venture with a UK partner. For the investor, the UK offers access to a large consumer market, a respected legal framework, and strong professional services.

For the UK, inbound investment can support employment, skills transfer, and new technology. The legal side of FDI sits across several areas: company formation and governance under the Companies Act 2006, the national security screening regime introduced in 2021, sector-specific regulation (for example in financial services, communications, or energy), employment law, tax, and in some cases competition law. Understanding which of these apply to a particular deal is the first real task for any incoming investor.

Key steps

1. Clarify the structure of the investment. Before anything else, work out what you are actually doing. Are you buying shares in an existing UK company, setting up a new subsidiary, acquiring assets, or taking a minority stake? Each route has different legal, tax, and regulatory consequences, and the answer shapes every step that follows.
2. Check whether the National Security and Investment Act 2021 applies. The NSI Act gives the UK government power to review and, in some cases, block or unwind acquisitions that raise national security concerns. Certain sectors trigger a mandatory notification, while others can be called in voluntarily. Getting this wrong can invalidate a transaction, so it should be considered early.
3. Consider sector-specific rules. Financial services, telecoms, energy, defence, and some parts of the media sector carry their own licensing and ownership requirements. Regulators such as the FCA, Ofcom, or Ofgem may need to be notified or approve changes in control. If your target sits in a regulated industry, factor this into the timetable.
4. Plan the UK entity and governance. If you are incorporating a UK company, you will need to deal with Companies House registration, appoint directors, set up a registered office, and prepare articles of association. You will also need to register people with significant control. Getting governance right from day one reduces friction later.
5. Deal with tax, employment, and compliance obligations. Register with HMRC for corporation tax, consider VAT and PAYE, and think about transfer pricing if the UK entity will trade with group companies abroad. Employment law applies from the moment you hire, including written particulars, pension auto-enrolment, and right-to-work checks. Anti-money laundering and data protection duties will also be relevant.

Common questions