Group S: payroll provider facts

Who it is

The payroll provider is the non-profit Group S Sociaal Secretariaat (enterprise number 0407.214.017), Ursulinenstraat 2 in Brussels. It belongs to a group of Belgian entities that includes Group S NV, a social insurance fund for the self-employed, a business one-stop shop and the Office Patronal de Compensation.

According to the Crossroads Bank for Enterprises the non-profit has existed since 11 May 1945; Group S itself speaks of more than 80 years of HR experience.

Sources: KBO Public Search, Group S Sociaal Secretariaat (0407.214.017) (checked on 11 November 2026); Group S, déclaration de protection de la vie privée (entités du groupe) (checked on 11 November 2026); Group S, over ons: werkgevers, kantoren en doelgroep (checked on 11 November 2026)

Approval

Group S is on the list of approved payroll providers for employers published in the Belgian Official Gazette on 15 July 2025 (situation on 20 June 2025), under number 100, as GROUP S, SOCIAAL SECRETARIAAT, Sociaal secretariaat voor werkgevers V.Z.W..

Under the royal decree of 28 November 1969 an approved payroll provider is a non-profit that must state its approval number on every document it issues. Your payslip from Group S should therefore carry number 100.

Sources: FOD Sociale Zekerheid, lijst van de erkende sociale secretariaten van werkgevers op 20 juni 2025 (Belgisch Staatsblad 15 juli 2025) (checked on 11 November 2026); Koninklijk besluit van 28 november 1969, art. 44 tot 49 over de erkende sociale secretariaten van werkgevers (Justel) (checked on 11 November 2026)

Offices, clients and target group

Besides its head office in Brussels, Group S has 21 regional offices, its about page says.

According to Group S its payroll service supports some 20,000 employers. We found no number of payroll calculations.

Group S describes itself as a point of contact for large and small companies, the self-employed, starters and bookkeepers.

Source: Group S, over ons: werkgevers, kantoren en doelgroep (checked on 11 November 2026)

Services in the same group

The group includes the Formalis business one-stop shop, fully managed by Group S, and a social insurance fund for the self-employed. We found no external prevention service or child benefit fund on groups.be.

Sources: Group S, ondernemingsloket Formalis (checked on 11 November 2026); Group S, déclaration de protection de la vie privée (entités du groupe) (checked on 11 November 2026)

Public pay and indexation information

Group S publishes a simulation tool for the cost of an employee and an explanation of automatic wage indexation in 2026. We found no indexation forecast per joint committee.

Sources: Group S, hoeveel kost een werknemer (met simulatietool) (checked on 11 November 2026); Group S, simulatietool loonkost (Salary sim) (checked on 11 November 2026); Group S, automatische loonindexering: voor wie en hoe (2026) (checked on 11 November 2026)

Price and termination

On 11 November 2026 groups.be showed no price for the payroll service.

On 11 November 2026 we found no public terms or organic regulation with the termination rules of the payroll service on groups.be. Ask for them before you sign.

Source: Group S, over ons: werkgevers, kantoren en doelgroep (checked on 11 November 2026)

Comparing with other payroll providers

On the comparison page Group S sits next to seven other approved payroll providers, in alphabetical order and with the same data: approval number, offices, own client figures, target group and services in the group. There is no ranking and no rating.

Source: FOD Sociale Zekerheid, lijst van de erkende sociale secretariaten van werkgevers op 20 juni 2025 (Belgisch Staatsblad 15 juli 2025) (checked on 11 November 2026)