Few concepts are as central to EU law as the Four Freedoms. They form the constitutional backbone of the Single Market, shaping everything from cross-border trade to the rights of individuals living, working, and studying across the EU. Understanding them is essential for anyone studying EU law – and invaluable for practitioners navigating the post-Brexit legal landscape.
In this post, we’ll break down each freedom, explore the key legal principles and case law, and explain why they remain foundational to the EU’s economic and political identity.
What Are the Four Freedoms?
The Four Freedoms guarantee the free movement of:
- Goods
- Workers (Persons)
- Services
- Capital
Together, they create a borderless economic space where barriers to trade and mobility are removed unless justified on narrow, treaty-based grounds.
Free Movement of Goods
The free movement of goods is built on two pillars:
(a) Prohibition of custom duties and charges having equivalent effect (Articles 28-30 TFEU) https://eur-lex.europa.eu/eli/treaty/tfeu_2016/art_28/oj/eng
The EU’s customs union eliminates tariffs between Member States and prevents states from imposing disguised protectionist charges.
Key case: Commission v Italy (Art Treasures) https://eur-lex.europa.eu/legal-content/en/TXT/?uri=CELEX:61968CC0007 Italy’s export tax on cultural goods was struck down as a charge having the equivalent effect.
(b) Prohibition of quantitative restrictions and measures having equivalent effect (Article 34 TFEU) https://eur-lex.europa.eu/eli/treaty/tfeu_2016/art_34/oj/eng
This is where the real action happens. Article 34 catches not only explicit quotas but also national rules that hinder market access.
The Dassonville Formula
“All trading rules enacted by Member States which are capable of hindering, directly or indirectly, actually or potentially, intra-Community trade…”
This famously broad definition means even well-intentioned national rules can breach EU law. https://eur-lex.europa.eu/legal-content/en/TXT/?uri=CELEX:61974CJ0008
The Keck Exception
To curb the over-expansion of Article 34, Keck carved out “selling arrangements” – provided they applied equally in law and fact. https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=celex:61991CJ0267
Modern approach: Market Access
Cases like Commission v Italy (Trailers) https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:62005CC0110(01) shifted the focus to whether a measure hinders market access, even if it’s not discriminatory.
Free Movement of Persons (Workers)
Article 45 TFEU guarantees workers the right to move freely, accept employment, and enjoy equal treatment. https://eur-lex.europa.eu/eli/treaty/tfeu_2016/art_45/oj/eng
Who counts as a “worker”?
The Court definition in Lawrie-Blum https://eur-lex.europa.eu/legal-content/en/TXT/?uri=CELEX:61985CJ0066 remains the gold standard:
A worker performs services for and under the direction of another, in return for remuneration.
This broad definition includes part-time workers (Levin), trainees, and even those earning below subsistence level. https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:61981CJ0053
Equal treatment and social advantages
Workers are entitled to the same social and tax benefits as nationals (Even, Cristini).
Restrictions and justifications
Only limited derogations apply – public policy, public security, and public health – and they are interpreted strictly.
Free Movement of Services
Services are the “residual freedom”: if an activity isn’t goods, persons, or capital, it’s probably a service.
Article 56 TFEU protects: https://eur-lex.europa.eu/eli/treaty/tfeu_2008/art_56/oj/eng
- Providers moving to another Member State
- Recipients travelling to receive services
- Services provided remotely (e.g., online)
Key case: Van Binsbergen – restrictions on providing services across borders must be justified and proportionate. https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:61974CJ0033
Professional qualifications
Mutual recognition is central here, supported by Directive 2005/36/EC. https://eur-lex.europa.eu/eli/dir/2005/36/oj/eng
Services Directive (2006/123/EC) https://eur-lex.europa.eu/eli/dir/2006/123/oj/eng
A major (and controversial) attempt to liberalise the services market, though significantly watered down from its original “country of origin” approach.
Free Movement of Capital
The most modern and least litigated freedom – but increasingly important.
Article 63 TFEU https://eur-lex.europa.eu/eli/treaty/tfeu_2008/art_63/oj/eng prohibits restrictions on capital movements both within the EU and with third countries.
What counts as capital?
The Court relies on the Nomenclature annexed to Directive 88/361/EEC, https://eur-lex.europa.eu/eli/dir/1988/361/oj/engcovering:
- Direct investment
- Real estate purchases
- Securities and shares
- Loans and credit
Key themes
- Golden shares: Member States cannot retain special control rights in privatised companies (Commission v Portugal). https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:62008CJ0171
- Third-country capital: Restrictions must still be justified, but Member States have slightly more leeway.
Why the Four Freedoms Matter Today
Even after Brexit, the Four Freedoms remain essential for UK lawyers and scholars:
- They shape the EU-UK Trade and Cooperation Agreement.
- They influence UK regulatory choices (e.g., divergence vs alignment).
- They remain core to understanding EU citizenship and rights of UK nationals in the EU.
- They underpin the EU’s global trade strategy and internal cohesion.
For EU Member States, the Four Freedoms are not just economic tools – they are constitutional commitments to openness, integration, and shared prosperity.
Conclusion
The Four Freedoms are more than legal rules: they are the architecture of the Single Market. Each freedom has evolved through decades of case law, balancing national autonomy with the EU’s commitment to removing barriers. For students, practitioners, and policymakers, understanding these freedoms is essential to grasping how the EU functions – and why it remains one of the most integrated economic areas in the world.
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