What is posting of workers?
Posting of workers means the temporary assignment of an employee by an employer established in one country to perform work in another country, while the employment relationship with the sending employer continues. In the European Union, this area is regulated primarily by Directive 96/71/EC concerning the posting of workers in the framework of the provision of services, Directive 2014/67/EU on enforcement, and Directive (EU) 2018/957 amending the posting rules.
Posting is not the same as a permanent transfer of employment, business immigration, or local recruitment. The worker remains employed by the sending employer, but performs work in the host country for a limited period. The host country may require compliance with selected local employment standards, administrative notifications, documentation duties, and inspection rules. These obligations often apply regardless of the governing law chosen in the employment contract.
In practice, posting of workers is relevant for companies providing cross-border services, group companies assigning staff to foreign branches or affiliates, construction and installation projects, transport, maintenance services, IT implementation, engineering, consulting, and other temporary assignments. In Poland, the rules may apply both to foreign employers posting workers to Poland and to Polish employers posting employees to other EU Member States.
What does posting of workers involve?
Posting of workers usually involves several overlapping legal areas: employment law, social security, tax, immigration, corporate compliance, and contract law. The employer must determine whether the assignment qualifies as a posting, which country’s mandatory employment rules apply, what documents must be kept, and whether any notification must be submitted before the work starts.
Under EU posting rules, the host Member State must require compliance with its core employment conditions. These typically include remuneration rules, working time, rest periods, paid annual leave, health and safety, equal treatment, conditions of hiring-out of workers by temporary work agencies, and accommodation standards where provided by the employer. The exact scope depends on the host country’s national implementation of EU law.
A key distinction concerns short-term and long-term posting. Under Directive (EU) 2018/957, where the effective duration of a posting exceeds 12 months, the host country’s broader employment conditions generally apply, except for rules on concluding and terminating employment contracts, including non-compete clauses, and occupational pension schemes. This 12-month period may be extended to 18 months if the employer submits a motivated notification, as provided by Directive (EU) 2018/957.
Social security is assessed separately from employment law. Under Article 12 of Regulation (EC) No 883/2004, a posted worker may, in certain circumstances, remain subject to the social security legislation of the sending state if the anticipated duration of work does not exceed 24 months, the employer normally carries out activities in the sending state, and the worker is not sent to replace another posted person. In practice, this is commonly confirmed by an A1 certificate issued by the competent institution of the sending country.
Tax consequences should also be reviewed separately. A posting may affect personal income tax obligations of the employee, payroll withholding duties of the employer, the risk of creating a permanent establishment, and transfer pricing arrangements within a group. The applicable result depends on domestic law, double tax treaties, the employee’s presence in the host country, and the structure of the services performed.
When should legal advice be sought on posting of workers?
Legal advice is recommended before the assignment begins, especially where employees are to work in another country for several weeks or months, where services are provided on a client’s site, or where a group company hosts employees from another jurisdiction. Early assessment helps identify whether the case is a posting, a business trip, temporary agency work, intra-group secondment, or local employment.
Private individuals may need advice when they are asked to work abroad temporarily and want to understand their rights, remuneration, social security status, tax exposure, working time, accommodation conditions, or the consequences of signing additional assignment documents. Employees should also verify whether they remain covered by the sending country’s social security system and whether the employer has fulfilled host-country obligations.
Businesses should seek support when preparing cross-border service contracts, assigning employees to Poland or from Poland, using subcontractors, participating in construction or industrial projects, or employing workers through temporary work agencies. Particular attention should be paid to notification duties, local representative requirements, document retention, payroll adjustments, health and safety obligations, and inspection risks.
A quick consultation with a lawyer can help avoid incorrect classification of the assignment, underpayment claims, administrative penalties, tax arrears, disputes with employees, or problems during labour inspections. It may also reduce the risk of non-compliance by subcontractors, which can be relevant where host-country rules impose joint or chain liability in specific sectors.
Legal support in posting of workers matters
Support of a law firm in matters concerning posting of workers may include in particular:
- assessment whether a planned assignment qualifies as posting of workers, business travel, secondment, or local employment;
- review of employment contracts, assignment letters, secondment agreements, and cross-border service contracts;
- analysis of mandatory employment conditions applicable in the host country;
- support with notification duties and documentation required by labour authorities;
- advice on remuneration, working time, holiday entitlement, health and safety, and accommodation obligations;
- coordination of employment law issues with tax, social security, and immigration aspects;
- assistance during inspections by labour authorities and in disputes with employees or contractors;
- preparation of internal procedures for recurring cross-border assignments.
Need legal assistance with posting of workers? Contact us.
See also
- Employment Contract
- Dismissal
- Tax Law
- Commercial Law