Ghent: A Belgian contractor who brings in a Polish scaffolding crew still files a Belgian form, under Belgian rules, in a system that resembles none of the other 26. Council and Parliament negotiators agreed on 23 June to replace that patchwork for posted workers with a single European declaration.
The regulation orders the Commission to build a multilingual public interface where companies declare a posting once, using a standard online form with a common set of data points. Member states decide whether to join. Once a capital opts in, it must use the European interface exclusively and cannot ask a company for a second national declaration on top.
The scale explains the interest. The European Labour Authority counts roughly 3.6 million postings a year involving about 2.6 million workers, and around 1.2 million people work in two or more member states. The Commission estimates the standard form cuts the time a company spends on declarations by 73%, and puts the cost saving at 58% even if only a handful of states participate. Full participation by all 27 would push the burden reduction to 81%.
Negotiators added more than a form. The provisional agreement lets service providers upload supporting documents through the same interface, replacing national submission procedures, and builds in technical validation of data, a channel for authorities to query providers directly, and a right for posted workers to obtain an electronic extract of their own declaration. Member states may also use the interface for third-country providers sending staff temporarily. Five years after implementation, the Commission must review whether the data requirements still make sense.
Politically, the file matters more than its plumbing suggests. Ministers and MEPs signed a “One Europe, One Market” roadmap on 24 April 2026 listing priority single market fixes with dates attached, and the e-declaration carried a June deadline. They met it with a week to spare, which gives the roadmap a first success to point at. Enrico Letta’s report on the internal market had singled out posting paperwork as one of the ten worst barriers to mobility, and the original Commission proposal built directly on that finding.
The voluntary design carries an obvious risk. States with the most elaborate national portals have invested in them and gain least from switching, yet those are precisely the destinations where most postings land. If Germany, France and Austria stay out, a Polish or Portuguese firm still juggles several systems and the headline savings shrink to a rounding error.
Trade unions read the file narrowly and want it kept that way. Simplifying a declaration does not change what a posted worker earns, which is governed by the Posting of Workers Directive, nor does it touch labour inspectors’ powers. Their concern is that a cleaner form becomes an argument for lighter checks. Employers make the mirror argument, that standardised data will make cross-border enforcement easier because inspectors will finally read comparable records through the Internal Market Information System.
Both institutions still have to endorse and formally adopt the text before the Commission can commission the platform. The real test comes afterwards, when 27 governments decide one by one whether a shared form is worth giving up a national one.




