Short answer
Article 63 of the Treaty on the Functioning of the European Union (TFEU) expressly protects capital movements and payments between EU Member States and non-EU countries. It can therefore be invoked against national rules that deter inbound investment, disadvantage non-EU funds or shareholders, or obstruct outbound investment. That reach is unusually broad: most other internal-market freedoms do not generally extend to third countries.
The protection is not absolute. First, the transaction must genuinely fall within free movement of capital, rather than use Article 63 to obtain a third-country right of establishment that the Treaties do not provide. Second, Articles 64–66 TFEU contain special qualifications for third-country capital. Third, a Member State may defend a restriction on grounds such as effective fiscal supervision, prudential supervision, public policy, or public security. The EU's foreign-investment-screening regulations operate within that framework.
A restriction is most likely to survive when it addresses a real, sufficiently serious risk; uses clear and objective criteria; is no broader than necessary; gives reasons; and permits effective legal challenge. “National security” is not a label that ends EU-law review.
Why Article 63 reaches beyond the EU
The starting point is the Treaty text, not reciprocity with the investor's home country:
“Within the framework of the provisions set out in this Chapter, all restrictions on the movement of capital between Member States and between Member States and third countries shall be prohibited.”
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The prohibition covers rules liable to deter or disadvantage a cross-border capital movement, not only explicit nationality discrimination. Article 63(2) separately prohibits restrictions on payments. In , the Court of Justice confirmed that the predecessor provisions could be relied on before national courts in third-country cases and could make inconsistent national rules inapplicable.
Portfolio investments, purchases of securities, dividends, real-estate investment, loans, and direct investment can all engage the capital chapter. In , a United States investment fund could invoke Article 63 against a Polish dividend-tax exemption reserved to domestic funds.
But classification matters. Freedom of establishment under Article 49 TFEU does not generally protect establishment in or from third countries. In , the Court focused on the purpose of the challenged national legislation. If a rule applies exclusively to holdings that confer decisive influence over a company, neither Article 49 nor Article 63 may be available in a third-country situation. If the rule is not confined to controlling holdings, Article 63 may apply even where the claimant's actual holding gives it influence. The rule's design, not a label attached to the investment, controls that threshold question.
What is special about third-country capital?
Article 64(1) TFEU preserves certain restrictions that existed on 31 December 1993—later dates apply to Bulgaria, Estonia, Hungary, and Croatia—where they concern direct investment, establishment, financial services, or admission of securities to capital markets. This “standstill” is narrow. A Member State must establish both continuity with the old restriction and that the movement falls within a listed category. A materially new post-cut-off regime is not protected merely because an earlier law regulated the same field.
Articles 64(2) and (3) give the EU legislature powers over specified third-country movements, with unanimity required for a step backwards in liberalisation. Article 66 permits the Council, in exceptional circumstances, to impose strictly necessary safeguards for no more than six months where third-country capital movements cause or threaten serious difficulties for economic and monetary union. These are structured Treaty powers, not a general national licence.
The Court also recognises that third-country movements occur in a different legal context. EU rules may not provide the same administrative cooperation, accounting standards, or supervisory assistance. That difference can affect whether a justification succeeds. It does not change Article 63's basic concept of a restriction or allow blanket exclusion without examining available evidence and cooperation arrangements.
Which public-interest restrictions can be justified?
Article 65(1) TFEU preserves limited national powers. Member States may make relevant tax distinctions between taxpayers in different situations, prevent infringements of law, supervise financial institutions prudentially, require declarations for administrative or statistical purposes, and take measures justified by public policy or public security. Article 65(3) supplies the critical boundary: those measures must not amount to arbitrary discrimination or a disguised restriction.
Effective fiscal supervision illustrates the fact-specific approach. In A, the Court accepted that a tax advantage could be refused when compliance could be verified only through information from a third-country authority and no contractual information-exchange obligation existed. In Emerging Markets, however, automatic exclusion of a non-EU fund could not stand if an applicable convention enabled the tax authority to verify the information supplied. A Member State must assess the actual cooperation mechanism; “outside the EU” is not itself proof that verification is impossible.
Other overriding public-interest requirements may apply, but the familiar proportionality questions remain: is the objective legitimate, is the measure suitable, and could a less restrictive measure achieve it? Purely economic aims do not become public-security interests by being described as strategic policy.
When can investment screening survive security review?
As at 29 July 2026, Regulation (EU) 2019/452 remains the generally applicable EU framework for Member State screening on security or public-order grounds. Regulation (EU) 2026/1386 has now been adopted as its successor. Most of the new regime applies from 17 January 2028, when the 2019 Regulation is repealed; specified preparatory provisions apply from 16 July 2026. Investments already undergoing screening or completed by the 2028 cut-off remain under the old regime.
The 2019 Regulation preserves each Member State's responsibility for national security and choice whether to screen a particular investment. It also requires a disciplined process:
“Rules and procedures related to screening mechanisms, including relevant timeframes, shall be transparent and not discriminate between third countries.”
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Investors and affected undertakings must be able to seek recourse against national screening decisions. Article 4 identifies relevant factors, including effects on critical infrastructure, critical and dual-use technologies, critical inputs, sensitive information, and media pluralism. The authorities may also consider whether a foreign investor is controlled or significantly funded by a third-country government, has previously affected security or public order, or presents a serious risk of illegal or criminal activity. These factors do not create automatic presumptions of illegality.
Earlier case law shows the intensity of review. In , France required prior authorisation for investments described only in general terms as threatening public policy or security. The Court rejected that uncertainty:
“Thus, public policy and public security may be relied on only if there is a genuine and sufficiently serious threat to a fundamental interest of society”.
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Prior screening is not always unlawful. Capital may be hard to identify and block after entry, so advance control may sometimes be necessary. The defect was a regime that did not tell investors which circumstances triggered authorisation and therefore failed legal certainty.
, provides the contrasting example. Belgium retained a limited right to oppose particular decisions concerning strategic energy infrastructure. Safeguarding minimum energy supplies during a genuine crisis was a legitimate public-security interest. The scheme survived because it used an opposition mechanism rather than blanket prior approval, covered identified strategic assets and decisions, imposed strict time limits, required reasons, and allowed judicial review. The Commission had not shown that a less restrictive measure would work.
That outcome is not a universal approval of “golden shares” or strategic-control powers. It demonstrates how a narrowly designed measure can pass review on its facts.
Questions to test a proposed restriction
Before assuming that a third-country investment may be blocked, ask:
- Is the challenged rule about capital, or exclusively about controlling establishment?
- What specific deterrent or unequal treatment constitutes the restriction?
- Does an Article 64 standstill apply, and can the State prove continuity from the relevant date?
- What concrete public-policy, prudential, fiscal, or security interest is at risk?
- Is the threat genuine and sufficiently serious, rather than hypothetical or purely economic?
- Are the trigger, evidence, deadlines, and decision criteria transparent and objective?
- Could notification, conditions, targeted information requests, or sector regulation address the risk less restrictively?
- Does the investor receive reasons and effective judicial recourse?
- Are third countries treated without arbitrary discrimination, while genuine differences in cooperation are assessed on evidence?
Conclusion
Article 63 gives third-country investments real protection but does not create a third-country freedom of establishment. Restrictions survive only through legal discipline: a serious identified risk, objective criteria, a necessary response, reasons, and judicial review. The screening regulations coordinate national systems; they do not exempt decisions from Treaty standards.
Sources
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This article provides general legal information, not advice for a specific matter. Laws, facts and procedural deadlines may change the result. Follow the linked primary sources and obtain local advice before acting.