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If the UK joined the European Union and the ordinary Treaty rules applied, UK nationals would generally become EU citizens and gain the right to move and reside in other EU member states, including for work and study. That is a conditional legal consequence of EU membership—not an announced policy or a guarantee about any future accession terms. The timing, transitional restrictions and exceptions would depend on the terms actually agreed.

What EU membership could change

EU citizenship follows the nationality of a member state. Article 20 of the Treaty on the Functioning of the European Union (TFEU) says that a person who holds the nationality of a member state is an EU citizen; that status is additional to national citizenship. Article 21 gives EU citizens the right to move and reside freely within member states, subject to Treaty limits and measures implementing the right. Read Articles 20–21 of the TFEU on EUR-Lex.

Under those ordinary rules, UK nationals could generally move to another member state to live, work, study, look for work or retire. The European Commission describes freedom of movement as “one of the foundations of the European Union.” This would not mean residence is unconditional, that every public benefit is automatically available, or that all administrative requirements disappear.

How the rules differ by activity

Activity UK citizens under current general rules EU citizens in another member state What accession would leave uncertain
Short visits Visa-free visits are generally allowed for up to 90 days in any 180-day period. The Commission describes this allowance as covering leisure visits. EU citizenship includes movement across member states. Schengen border arrangements are a separate matter. The precise travel and border arrangements would depend on applicable rules and accession terms.
Longer residence Permission under the destination country’s immigration rules is generally needed. EU law provides a right to move and reside, subject to conditions; registration may be required. The start date and any transition or exceptions are unknown.
Work National immigration and work-permission rules generally apply. The free-movement framework supports movement for employment and protects workers against nationality discrimination in employment conditions. Any transition for UK labour-market access would depend on accession terms.
Study Longer-term study is subject to the destination country’s immigration rules. EU-citizen residence rules may apply, subject to conditions and national administrative procedures. Tuition fees, funding and programme-specific eligibility require separate rules; free movement alone does not establish them.

The current visitor allowance is not permission to work, study long term or live in an EU country. For those purposes, UK citizens currently need to follow the destination country’s applicable requirements. The Commission’s guidance distinguishes leisure visits from work, study and longer stays. See Your Europe’s guidance on residence rights for EU and UK nationals after Brexit.

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Residence rights would still have conditions

EU free movement does not make every stay indefinite or remove national procedures. For residence beyond an initial period, the applicable rules can depend on a person’s situation—for example, whether they are working or self-employed, studying with sufficient resources and sickness insurance, or joining a qualifying family member. Registration may be required, and permanent residence is a distinct status. Procedures vary by country. Your Europe explains residence rights when living abroad in the EU.

Likewise, possible EU citizenship would not by itself determine tuition fees, student finance, recognition of qualifications or eligibility for a particular course. Those questions are governed by separate rules and would need to be checked for the country and programme concerned.

Withdrawal Agreement rights are a separate case

Some UK nationals already have protected rights in an EU host country under the EU-UK Withdrawal Agreement. In general, the protection applies to qualifying people who moved before the end of the transition period, subject to the Agreement’s conditions and the host country’s procedures. Covered UK nationals can continue to live, work, study and travel in their host state. This is not a general restoration of free movement for all UK citizens, including people who first moved after the transition period.

The relevant conditions broadly follow EU free-movement residence rules: workers and self-employed people qualify, while others may qualify with sufficient resources and sickness insurance. Qualifying family members and people with permanent residence may also be covered. National residence schemes and procedures differ. See the European Commission’s explanation of citizens’ rights under the Withdrawal Agreement.

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EU membership would not automatically settle Schengen or accession terms

EU membership and participation in the Schengen area are separate questions. The Treaty provisions support EU citizens’ movement and residence rights, but they do not establish what the UK’s border arrangements would be after a hypothetical accession. Nor is there an agreed accession date, transition period, labour-market restriction or exception to report as fact. Those details would require an actual agreement.

The European Commission reports estimates of more than 1,060,000 UK nationals living in EU member states and more than 5 million EU citizens granted a new residence status in the UK. The page does not clearly state a reference year alongside these figures, so they should not be read as 2026 population estimates or as counts measured at the same time. See the Commission’s citizens’ rights information.

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