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LuxembourgCentre Commun de la Sécurité Sociale

CCSS replaces exit declaration with affiliation-change step on MyGuichet

MyGuichet.lu gains a certified-space affiliation-change procedure covering end dates, cancellations and other edits; SECUline filing stays available.

By Taxxa AI OyPublished 8 October 2026

Payroll & Labour

Employers that manage social-security affiliations through MyGuichet.lu face a new procedure. The Centre commun de la sécurité sociale (CCSS) has made a new « Modification d'une affiliation » step available in the certified professional space on MyGuichet.luPublic, and that step replaces the former « Déclaration de sortie »Public. The page announcing the change is dated 8 October 2026.

The new step covers three operations: adding or changing an affiliation end date, cancelling an affiliation, and changing other elements of an affiliation.Public That scope matters because the procedure it replaces was framed around exits: teams whose playbooks still point staff at the exit declaration need to redirect them to the affiliation-change step, which also absorbs modifications and cancellations.

Access runs through certification. The CCSS requires the employer's professional space on MyGuichet.lu to be certifiedPublic, with the certification request itself made through the dedicated « procédure de certification de votre espace professionnel du CCSS »Public. An uncertified space cannot use the new stepPublic, so payroll teams should check the certification status of each client space before the next exit or correction falls due rather than discovering the block at filing time.

One population is explicitly spared any change. Employers and their mandataires that file affiliation declarations — entries, exits, modifications and cancellations — through SECUline may continue to use that channel exactly as before.Public The new MyGuichet.lu step therefore bites only on the MyGuichet filersPublic: mixed practices that file some clients via SECUline and others via MyGuichet.lu keep the SECUline leg untouched and move only the MyGuichet leg to the new step.

The announcement carries no transitional deadline and no staged timetablePublic: the new step is presented as available now, replacing the old onePublic. The practical move is immediate and administrative — update internal filing guides to name the « Modification d'une affiliation », confirm which client spaces are certified, and leave SECUline workflows alone.

Legal basis: CCSS news « Nouvelle démarche pour gérer vos affiliations sur MyGuichet.lu » of 8 October 2026, announcing the « Modification d'une affiliation » in the certified professional space on MyGuichet.lu, replacing the « Déclaration de sortie », with SECUline filing unchanged.

Redirect MyGuichet.lu affiliation work to the new Modification d’une affiliation step, confirm each client professional space is certified, and leave SECUline filing workflows unchanged.

Sources

Nouvelle démarche pour gérer vos affiliations sur MyGuichet.lu