EU citizen with a Polish JDG: can you stay insured in your home country?

Sometimes, but not because you choose to. EU rules put you under one country’s social security at a time, and the deciding factor is where you work, not your passport. If you live and work in Poland, your JDG (jednoosobowa działalność gospodarcza, a sole trader business) pays ZUS, the Polish social insurance institution. You stay insured at home only when the rules say so, and an A1 certificate proves it.

One country at a time, decided by where you work

The rule comes from Regulation (EC) 883/2004, which coordinates social security across the EU, the EEA and Switzerland. A self-employed person is insured where they actually work. biznes.gov.pl, the government business portal, sums it up for EU citizens in Poland: you are subject to the law of one state, “according to the principle of the place of work”.

Three things follow from this:

• Citizenship does not matter. A Belgian, a German and a Pole running the same JDG from Warsaw pay the same ZUS.
• The country covers both social and health insurance. You cannot split pension in one country and health cover in another.
• Tax is a separate question. Where you pay income tax is decided by other rules (the Polish income tax act and tax treaties). You can be a Polish tax resident and insured abroad, or the other way round. See tax residency in Poland.

Watch out: “I am an EU citizen, so I stay insured at home automatically” is a common mistake. If you live and work in Poland, Polish law applies until an A1 says otherwise.

When another country’s system applies to you

These are the situations the EU rules and ZUS describe. The country whose law applies is the one that issues the A1.

A job in another country wins. If you are employed in one EU country and self-employed in another, you are insured where you are employed. ZUS’s own example: a person lives in Poland, runs a Polish business and has a job in Germany. German law applies, and the German institution issues the A1. Marginal work is ignored.

The job has to be done in that country. If you work remotely from Poland for a foreign employer, that job counts as work in Poland. If your job is in Poland, read a job and a JDG at the same time instead.

The posting rule is narrow. It covers someone who already runs a business in their home country and goes to another country to do similar work for up to 24 months. The conditions:

• The business at home has been running for at least 2 months before you leave (shorter periods are judged case by case).
• You keep it going (office, taxes, VAT number) and come back to it.
• The work abroad is similar. ZUS’s examples: a tailor who goes abroad to clean offices does not qualify, and neither does someone who started the business 15 days before leaving.

It does not cover moving your life to Poland and opening a new business here.

The same rule works in the other direction. If your Polish JDG sends you to do similar work in another EU country for up to 24 months, you stay in Polish ZUS, and ZUS issues the A1.

What if your clients are in several countries?

Having clients abroad is not the same as working abroad. The rules count the country where you actually work. A JDG owner who works from a desk in Kraków for clients in Belgium and Germany works in Poland, so Polish law applies and there is no A1 to ask for.

The several-countries rules come in when you really carry out your activity in more than one country, for example by regularly working on site at clients’ premises abroad. Then:

• You are insured in your country of residence if you do a substantial part of your work there. It is judged on turnover, working time, number of services and income. Less than 25% on these criteria is a sign that it is not substantial, within an overall assessment.
• Otherwise you are insured where the centre of interest of your activity is.
• ZUS’s example: someone living in Poland with 35% of turnover in Poland, 10% in Belgium and 55% in France is insured in Poland.

Who decides: the institution of the country where you live. If that is Poland, you report to ZUS; since 1 April 2022 ZUS accepts A1 applications only electronically, through eZUS, its online portal (formerly PUE ZUS). ZUS makes a provisional decision and tells the other countries. The decision becomes final if no other institution objects within 2 months.

Tip: if you are not sure how your mix of work counts, ask ZUS before you register. It is the institution that will decide your case anyway if you live in Poland.

The CEIDG box “Jestem ubezpieczony za granicą” (I am insured abroad)

When you register or change your JDG in CEIDG, the public register of sole traders, the section on compulsory insurance (Podlegam obowiązkowemu ubezpieczeniu) offers three choices: ZUS, KRUS (the farmers’ scheme) or Jestem ubezpieczony za granicą. The option is still on the 2026 form.

If you tick “insured abroad”:

1. You give your foreign tax and insurance numbers in section 20 of the form.
2. You deliver an A1 (or an equivalent document) to your ZUS branch (on a later change of your entry, only if you are switching to foreign insurance). It proves that your compulsory social and health insurance is paid in another country.
3. If you do not deliver it, ZUS will require you to register for Polish insurance and pay contributions.

File on biznes.gov.pl rather than in the mObywatel app (the government’s phone app): the app cannot record foreign insurance. Opening a JDG as a foreigner walks through the rest of the form.

For foreigners: two documents with similar names do different jobs. The A1 says which country’s social security law applies to you. The S1 lets you use public healthcare in the country where you live while you are insured in another.

Do you still pay the Polish health contribution?

No. With an A1 from another country you pay neither Polish social contributions nor the Polish health contribution. Both belong to the country whose law applies.

For scale, this is what a JDG in Polish ZUS pays in 2026 before income tax (ryczałt is the flat-rate tax on revenue):

ZUS explained and the health contribution cover these amounts in detail.

Seeing a doctor in Poland: the S1

You are insured in the other country, but if you live in Poland you still need to see a doctor here. EU rules say you must register with the health insurer of your place of residence, using a document from your own insurer (Regulation 987/2009, art. 24).

In practice that is the S1. You get it from your insurer abroad and register it at the branch of NFZ, the Polish National Health Fund, for the province where you live. NFZ keeps the S1 and gives you a confirmation. If you have a PESEL (the Polish identification number), clinics can check your cover electronically.

You are then treated on the same terms as people insured in Poland. The EU’s Your Europe portal says people who work in one country and live in another can get treatment in both.

What happens to ulga na start and preferential ZUS?

While another country’s law applies, you pay nothing to Polish ZUS, so ulga na start (six months without social contributions) and preferencyjny ZUS (24 months on a reduced base) simply do not come into play.

The question matters on the day you switch to Polish ZUS, for example when your job abroad ends. You then register with ZUS within 7 days of the change. What is settled and what is not:

• Settled: a business you ran earlier in another EU or EEA country or Switzerland, under that country’s law, does not block the preferential base. ZUS’s 2026 guide says so, whatever your citizenship.
• Not confirmed: whether the same applies to the 60-month test of ulga na start. The ZUS guide gives the example only for the preferential base.
• Not confirmed: whether months your Polish JDG spent insured abroad use up the 6-month and 24-month allowances. We found no ZUS guidance on it.

Ask ZUS about your own dates before you register; its contact centre is on 22 560 16 00. Ulga na start and preferential ZUS explains the normal conditions.

What to do next

1. Write down where you actually work, where you live and whether you have a job anywhere. These decide your country, not your passport or your clients.
2. If everything happens in Poland, tick ZUS in CEIDG and register within 7 days.
3. If you have a job abroad or really work in several countries, get the A1 from the country whose law applies (through eZUS if you live in Poland and work in several countries).
4. Tick Jestem ubezpieczony za granicą on biznes.gov.pl and take the A1 to your ZUS branch.
5. If you live in Poland, get an S1 from your insurer abroad and register it at your regional NFZ branch.
6. When your situation changes (the job ends, the posting ends), check again: you may owe Polish ZUS from that day.