Have you worked in three EU countries? You don't have three problems – you have one system. EU coordination of social security (Regulations 883/2004 and 987/2009) connects 31 countries (EU + Iceland, Liechtenstein, Norway, Switzerland, and in a limited version also the United Kingdom) with four fundamental principles: you are subject to one system at a time, on equal terms with locals, periods from different countries are aggregated, and cash benefits follow you across borders. This guide is a map of the entire system – from A1 through pensions and Kindergeld to unemployment benefits during relocation – with references to our detailed national guides. And with news: in 2026, the system will undergo its first major revision in 16 years.
Zero Principle: Which Country Insures You
| Situation | Which Country |
|---|---|
| Working in one country | Country of employment (lex loci laboris) – place of residence and employer's location are irrelevant |
| Delegation | For 24 months, you remain in the system of the sending country – with an A1 certificate (extension possible with the consent of both countries); during this time, you do not accrue rights in the host country |
| Working in several countries | If you perform a significant part of your work in your country of residence (approximately 25% of time/salary) – its system; otherwise, the country of the employer's location |
| Cross-border telework | Framework agreement (from 1.07.2023, Poland has signed): when working remotely from your country of residence for less than 50% of the time, you can apply to remain in the employer's country system (A1 in exceptional mode) |
| Self-employment in several countries | Center of interests of activity; when combining employment with self-employment, the country of employment prevails |
Pensions: One Application, as Many Payments as Countries
Apply once – in your country of residence
The institution in your country of residence (in Poland: ZUS) collects data from all countries through the EESSI system (~3270 institutions in 32 countries exchange documents electronically). Apply ~6 months before retirement – cross-border cases take time. In ZUS, specialized departments handle cases assigned to countries (e.g., Opole – Germany, Gdańsk – the United Kingdom, Szczecin – Nordic and Baltic countries, I Branch Warsaw – France and the USA; a complete current list at zus.pl/gov.pl).
Each country counts doubly and pays the better result
Domestic benefit versus proportional (theoretical pension for the entire career × share of periods in a given country) – you receive the more favorable from each country separately. Periods shorter than a year do not expire (they are taken over by the country with the longer service). In the end, you receive document P1 – a summary of all decisions.
Payment everywhere, without deductions "for abroad"
Pensions are exported to any EU/EEA country. National details – in our guides: Germany, Norway, United Kingdom (post-Brexit coordination operates through a protocol to the TCA agreement – with limitations, e.g., no family benefits). Non-EU countries are a world of bilateral agreements – a map in the guide on pensions from several countries.
Health: EKUZ, S1, S2 – Three Different Tools
- EKUZ (EHIC): only for temporary stays – treatment "necessary, which cannot wait until return", in the public system, on local terms. Polish card: free, validity according to status (workers 3 years, retirees of retirement age 20 years, students 18 months), and from January 1, 2026, applications only electronically (IKP/mojeIKP).
- S1: you live in a different country than you are insured (commuter, delegated, retiree with a foreign pension) – register the S1 from the insuring institution locally and receive treatment as a local insured person.
- Planned treatment: path S2 (prior approval, public system, settlement between institutions – you do not pay upfront; approval cannot be denied when the benefit due in the country is unattainable in a medically justified time) or cross-border directive (you organize yourself, also privately, pay and recover reimbursement to national rates – details at the National Contact Point).
Family Benefits and Unemployment Benefits
- Family benefits – priority principle: rights from work prevail over rights from pension, and these over rights from residence; when parents work in two countries, the first pays the country of the children's residence (if one parent works there), and the second supplements the difference – this is how German Kindergeld works for children in Poland (our guide) and Norwegian barnetrygd.
- Unemployment: periods from other countries are aggregated with document U1; you can export benefits for job searching in another country with document U2 (conditions: 4 weeks registration before departure, registration in the new country within 7 days; standard 3 months, with the possibility of extension to 6). Cross-border workers: benefits are paid by the country of residence, not the last place of work.
- Sick/maternity benefits: periods are aggregated, cash benefits are paid by the country of insurance also abroad; treatment is provided by the country of residence.
2026 Revision – the first overhaul of the system in 16 years: after a decade of stagnation (project from 2016, three unsuccessful rounds of negotiations), the Council and Parliament agreed in April 2026 on an amendment to the regulations, and the EP voted on it on July 7, 2026 – changes will include unemployment benefits (export for 6 months as a rule), long-term care, family benefits, and simplifications for A1 in short business trips. The text awaits formal adoption and publication – specific application dates will be known after announcement in the Official Journal; until then, the rules described above apply.
Where to Seek Help (for Free)
- SOLVIT – a free network of the Commission resolving disputes with authorities of another country (directly covers social security, pensions, and family benefits); online submission.
- Your Europe Advice – free legal advice in any of the 24 EU languages, response in ~a week.
- ELA / EURES – European Labour Authority: information on mobile rights, mediation between countries, EURES job placement network.
- Europe Direct helpline: 00 800 6 7 8 9 10 11 (in Polish).
Document Cheat Sheet: A1 – where you pay contributions; S1 – treatment in the country of residence; S2 – approval for planned treatment; U1 – periods for benefits; U2 – benefit export; P1 – collective pension decision. Collect work certificates and insurance documents from each country – EESSI exchanges data between institutions, but your file speeds everything up by months.
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