Payroll services in Luxembourg: from your first employee to monthly CCSS filings.

Hiring your first Luxembourg employee: what is needed before the first payslip?

Before running payroll, the employer needs its CCSS registration, the employee's contractual details and identification information. The entry declaration is generally due within eight days of hiring. Variable pay, tax class and any cross-border work pattern should then be checked before monthly payroll is approved.

What to check

1. Joiner checklist : Employment contract, start date, weekly hours, national ID or identity evidence and agreed pay.
2. Payroll computation : Check indexation, leave, overtime, benefits, tax class and applicable social contributions.
3. Monthly reconciliation : Match payslips to CCSS submissions and wage-tax withholding, and explain differences.

Deliverable: employee onboarding checklist, payroll calendar and validated first payslip; monthly prices and separate annual fees disclosed.

Employee registration : Guichet.lu

What are payroll services in Luxembourg?

Payroll covers everything that turns an agreed gross salary into net pay that is paid and declared: computing social contributions (employee and employer share), applying the wage-tax withholding based on the tax class, issuing the payslip, declaring remuneration to the CCSS and remitting the withholding to the ACD.

Outsourcing payroll means entrusting this monthly cycle to a licensed accountant: rate configuration, checks on variable pay and preparation of filings against an agreed calendar, with a single contact who also handles your accounting in Luxembourg.

Payroll and HR administration: the social secretariat

In Luxembourg, SMEs and craft businesses often call the provider that runs payroll and HR administration their social secretariat (secrétariat social). It covers the same cycle as outsourced payroll, extended to the formalities that surround each employee.

In practice it covers employer and employee affiliation with the CCSS, monthly payslips, wage tax remitted to the ACD, entry and exit declarations, leave and sickness tracking, indexation and standard employment contracts. Payroll is then reconciled each month with your accounting in Luxembourg, with no double keying between two providers.

CCSS affiliation and filings

Within 8 days of the start of employment, the employer declares the new hire to the Joint Social Security Centre (CCSS), which manages affiliation and contribution calls; beyond 30 days late, the CCSS may fine EUR 50 per month of delay, capped at EUR 2,500. Each month, remuneration is declared and contributions (health, pension, dependency, accident, employers' mutuality) are computed on the contributory base.

We handle entry and exit declarations, sickness and accidents, monthly filings and CCSS statements, aligned with your accounting and cash flow. Staff costs for the financial year then flow straight into the annual accounts filed with the RCS.

Tax cards and ACD tokens: which access does payroll need?

The tax card provides the withholding instructions used for salary tax. Employers retrieve electronic cards through a certified MyGuichet.lu business eSpace. The ACD token certifies that access; it is distinct from the LuxTrust authentication method.

When payroll is delegated, use the designated service-provider token. Do not give the employer token to the provider. See the activation procedure on Guichet.lu. Tell us about missing access when scoping the work; do not submit tokens or login codes through the quote form.

Switching payroll providers or taking over overdue payroll

To scope a takeover, tell us the employee count, intended handover month and last periods processed. Then prepare payslips and year-to-date totals, CCSS/RTS filings and acknowledgements, contracts, leave balances and outstanding payroll inputs.

Scope the next monthly cycle separately from historical corrections: identify missing periods, duplicate filings and access to renew before handover. Regularisation and exceptional work need separate pricing in the quote. Compare the full annual cost in our payroll fees.

Payslip: content and obligations

The payslip details gross salary, employee social contributions, wage-tax withholding, any benefits in kind and net pay. It must be issued monthly and retained. An error in tax class, index or base feeds directly into the employee's net pay and the filings.

We produce clear, compliant payslips, available to your employees through a dedicated portal, with the annual certificates they need for their tax return.

Gross to net: contributions, tax classes and index

Moving from gross to net depends on three elements: social contributions (employee share), the wage-tax withholding set by the tax class (1, 1a or 2, depending on family situation), and the index. The wage index automatically adjusts salaries to price developments: each time an index bracket is crossed, salaries are revalued.

Rates and thresholds follow the schedule in force (CCSS, ACD) and indexation. We apply up-to-date parameters and explain net pay to your employees, cross-border workers included.

Payroll for craft and construction businesses

In crafts and construction, payroll changes from month to month: overtime, bonuses, sickness absences, cross-border employees living in France, Belgium or Germany. The construction sector also has its own compensation scheme for hours lost to bad weather, handled with ADEM. Each variable changes the contribution base and the wage-tax withholding.

We collect these items by site or by team, and reconcile payroll costs with the margin of each site in accounting for construction firms.

Can a foreign company run payroll in Luxembourg without a local entity?

Yes, in principle. A business with no registered office in Luxembourg that employs staff working here must register as an employer with the Joint Social Security Centre (CCSS), enclosing a recent extract from its foreign trade register, and each employee must be declared within eight days of starting work (Guichet.lu, registration of employers). The wage-tax treatment depends on the double tax treaty between the employee's country of residence and Luxembourg, and is settled with the direct tax administration (ACD) before the first payslip.

Staff posted temporarily to Luxembourg under a service contract are a different case: they generally remain covered by their home country's social security under the applicable international rules, but the posting must be declared to the Inspectorate of Labour and Mines (ITM) at the latest when the work starts, with a contact person designated in Luxembourg (Guichet.lu, posting workers). An employer-of-record platform, which becomes the legal employer, is a third route. The right choice depends on how long the staff stay and on whether the activity creates a taxable presence in Luxembourg: review it before opening a payroll.

Why outsource payroll?

Running payroll in-house means software, constant monitoring of labour law, the index and rate schedules, and availability every month. For an SME, the error risk and hidden cost are high. Outsourcing assigns preparation and checks to a provider; it does not remove the employer's obligations. The engagement defines responsibilities, required documents and approval dates.

You gain reliability (compliant payslips and filings), continuity (no dependence on a key person) and clarity (payslip fees, fixed charges and exceptional work distinguished in the quote).

How much do payroll services cost?

Outsourced payroll costs EUR 25 excl. VAT per payslip for 1–5 per month, EUR 22 for 6–20 and EUR 20 for 21+. Opening the payroll file costs EUR 200 excl. VAT once; annual CCSS communications cost EUR 150 and annual RTS communications EUR 150 excl. VAT per employer, excluding special events.

Our approach: a readable per-payslip package, integrated with your accounting, with a firm quote after a short scoping call. You can estimate your budget with our fee simulator and benchmark it against our accounting fees in Luxembourg.