Cross-border worker in Luxembourg: the four insurances to check

233,000 cross-border workers, two systems to reconcile

Luxembourg counts more than 233,000 cross-border workers (first quarter 2026, STATEC), close to half of the country’s salaried employment, more than 126,000 of them from France, the rest from Germany and Belgium. Each of them lives in one insurance system and contributes to another. The four points below are where the two systems have to fit together.

1. Health: the S1, then a top-up plan on the right side

Your employer registers you with the CNS through the Joint Social Security Centre within eight days of hiring. You then request the S1 document from the CNS and hand it to the health fund of your country of residence, the CPAM in France, a mutualité in Belgium, a Krankenkasse in Germany: you are then treated on both sides of the border, with the CNS paying in the end. Two traps: your family members are not covered automatically and need a specific registration; and a standard mutual from your country of residence, built on the out-of-pocket costs of its own scheme, fits poorly with the CNS. Choose a top-up plan designed for the Luxembourg scheme, on the side where you actually receive care: CMCM is open to cross-border workers from the neighbouring regions, and Foyer medicis offers third-party payment for French cross-border workers through its partnership with Novamut. Our article on what the CNS really reimburses details the items concerned.

2. Car: insured where it is registered

As long as you live across the border, your car stays registered and insured in your country of residence; the daily commute to Luxembourg is covered like any other trip in Europe. The day you move to the Grand Duchy, everything changes: re-registration with the SNCA within six months of your declaration of arrival, and entry into the Luxembourg bonus-malus scale at level 11, unless your foreign driving history is recognised, which varies from one insurer to the next. Our car insurance comparison covers this point insurer by insurer.

3. Home: nothing changes while you live abroad

Your home stays insured locally; Luxembourg home insurance only concerns property located in the Grand Duchy. If you take a pied-à-terre or move in, plan ahead: almost every landlord requires an insurance certificate before handing over the keys. Our article tenant or owner, what do you need to insure? and the home insurance comparison cover the subject.

4. Savings and tax: article 157ter

Non-residents treated as residents for tax purposes (in principle at least 90% of their total taxable income earned in Luxembourg; for Belgian residents, more than 50% of the household’s professional income) enjoy the same deductions as a resident: €4,500 a year for article 111bis pension savings, €672 per household member for insurance premiums including complementary health cover (article 111). Our 111bis guide for 2026 details the conditions, and the life insurance comparison compares eligible contracts.

Where to start

The expat and cross-border comparison puts the offers designed for both systems side by side (CMCM, Foyer medicis with Novamut, DKV, Global Health, April), and our expat and cross-border insurance page summarises the questions to ask before a quote. If you have just settled in Luxembourg, our guide for new arrivals takes over.