How to Reduce Your CCSS Contributions in Luxembourg

If your CCSS bill feels heavy and your income is modest, there are several legal ways to reduce it. The right one depends on how much you earn — and how much social coverage you’re willing to give up. Read this article carefully before reducing: less in means less out when you really need it.

For the full picture of how CCSS works — rates, components, what’s covered — see our CCSS for self-employed in Luxembourg overview. This article focuses specifically on how to lower your monthly bill.

Reducing your CCSS contributions reduces your social coverage too — health insurance, sick pay, pension accumulation, parental benefits, accident insurance. Before applying any reduction, think about your personal and family situation: what would happen if you got sick, needed surgery, had a baby, or had to stop working? CCSS coverage is what protects you in those moments. Less now can mean a serious gap later.

Are you already covered through a family member?

Before deciding how aggressively to reduce, check whether you’re already covered through someone else. Luxembourg’s social security system has a built-in family coverage mechanism that many people don’t realise applies to them.

Family co-insurance (coassurance)

If a family member is insured under the main Luxembourg health scheme (CNS, via CCSS), you can be added to their coverage as a co-insured family member (coassuré) — free of charge. The legal basis is article 7 of the Code de la Securite Sociale.

Who can be co-insured (CSS art. 7):

• Spouse or registered partner under the Loi du 9 juillet 2004 (Luxembourg’s partenariat — not the French PACS, although the idea is similar)
• Children (own, adopted, or durably taken into the household) for whom the insured claims a tax allowance
• Ascendants and collaterals up to the 3rd degree — but only if there is no spouse or registered partner

For adult children:

• Co-insurance runs up to age 30 (i.e., age 29 inclusive), subject to a resource test — the child’s income must be below the REVIS (revenu d’inclusion sociale) for a single person. Student status is not required at this stage.
• Beyond age 30, co-insurance continues only with CNS authorisation and only if the child is in higher studies.

What it covers — and what it doesn’t:

• Covered: health insurance and dependency insurance — the same medical, hospital, and care benefits as the main insured person
• Not covered: pension, sick pay, accident insurance, parental / maternity / paternity income replacement — these are tied to your own professional activity and contributions

How to apply: according to CNS, it is not automatic — the main insured person must request co-insurance for the family member with CNS. Marriage, partnership, or having a child does not trigger it.

If your partner is salaried in Luxembourg or self-employed and paying full CCSS, you can usually be co-insured for health and dependency. Civil servants are insured under CMFE / CMFEC / CMFEP — separate funds with their own coassurance rules; confirm directly with their fund. The end result is similar but the procedure goes through their fund, not CNS.

What this changes for your CCSS decision

If you’re already covered for health through a family member:

• Reducing or even being exempt still leaves you with full medical coverage
• You only lose pension accumulation, sick pay, accident cover, and the income replacement during maternity / paternity / parental leave
• For a small side activity, this is often an acceptable trade-off
• For someone whose self-employment is their main work, the loss of sick pay and pension years still matters — even with health covered

If you’re not covered through a family member, reducing your CCSS can leave you without basic health cover, and that’s a much more serious decision.

Practical tip: If you’re married or in a registered partnership with someone insured in Luxembourg, check with CNS whether co-insurance is already active for you. Many people assume it kicks in automatically with marriage; it doesn’t — you have to request it.

Cross-border and special cases

Co-insurance can get more complicated if:

• You live in Luxembourg but your partner works (and is insured) abroad, or vice versa. The rules under EU Regulation 883/2004 apply — the country where the insured person works is the competent State, and family members residing in another Member State are typically registered with the foreign sickness fund using the S1 form.
• Your partner has private insurance only (not CNS or another EU public scheme) — co-insurance does not apply.
• You already have personal coverage from another activity (a salaried job, another scheme) — you cannot be co-insured at the same time. Personal affiliation always takes priority.

In any of these cases, contact CNS or CCSS directly to confirm what applies to you.

Lever 1: claim every deductible business expense

This is the simplest lever, and most self-employed people underuse it.

CCSS contributions are calculated on your professional income (revenu professionnel) — which is your profit, not your turnover. That is: