What the final text confirms

Three headline changes that we previously announced are confirmed in the consolidated text:

• The prior affiliation period is extended from one to three months. A worker recruited and immediately deployed to another Member State can no longer be posted under Article 12 of Regulation 883/2004; the home-country social security system must already have applied to that worker for at least three consecutive months before the assignment starts (new Article 14(1) of Regulation 987/2009).
• A generalised cooling-off period is introduced. Once a worker has been posted, or has carried out a similar self-employed activity in another Member State, for a total of 24 months — whether continuously or with interruptions of less than two months — no new posting under Article 12 may start for the same person and the same Member State until at least two months have elapsed (new Article 14(1a) of Regulation 987/2009). A derogation may be granted in specific circumstances.
• A pre-notification obligation is formally anchored in the regulation. Before any activity starts in another Member State on the basis of Article 12, the employer (or the self-employed person) must inform the competent institution and request the A1 attestation (new Article 15(1) of Regulation 987/2009).

On those three points the direction signalled in our earlier note has been fully confirmed. The interesting story, however, lies in the detail.

New: a meaningful exemption from the pre-notification obligation

The single most important addition for day-to-day mobility practice is the introduction of two carve-outs from the pre-notification duty (new Article 15(1b) of Regulation 987/2009).

Business trips are exempt

The pre-notification obligation does not apply to business trips. The notion is now defined in the implementing regulation itself (new Article 1(2)(eb)): a business trip is a temporary activity, limited in time, related to the business interests of the employer, excluding the provision of services or the delivery of goods, but including attending business meetings, cultural and scientific events, conferences and seminars (such as those linked to academic research) and receiving training.

This is a very welcome clarification. The line between a posting and a business trip has been a recurring source of legal uncertainty for years; the regulation now provides a usable working definition. Employers should note, however, that the carve-out specifically excludes activities that consist of providing services or delivering goods — which means that a sales engineer travelling to install equipment, or a consultant going on-site to deliver a workstream, will generally not benefit from this exemption.

Short activities: the 3-day / 30-day rule

Pre-notification also does not apply to activities with a total duration of no more than three consecutive working days within a 30-day period. This is a pragmatic threshold that should keep many ad-hoc cross-border interventions outside the new notification workflow.

There is one important exception: the 3-day / 30-day exemption does not apply to the construction sector. The compromise text introduces a specific Annex 6 to Regulation 987/2009 defining construction activities very broadly — covering excavation, earthmoving, the actual building work, prefabricated assembly and dismantling, fitting out and installation, alterations, renovation, repairs, dismantling, demolition, maintenance, painting and cleaning, and improvement works. The recitals justify this carve-out by reference to the high incidence of fraud, the volume of A1 attestations issued in this sector and the high accident rate. For construction groups, the practical message is straightforward: every cross-border deployment, no matter how short, will continue to require pre-notification.

Acknowledgement of receipt: a practical safety net

Another welcome practical innovation: where the A1 attestation cannot be issued immediately upon receipt of the request, the competent institution must issue an automatic acknowledgement of receipt, which itself constitutes evidence that the notification obligation has been complied with (new Article 15(1a) of Regulation 987/2009).

This matters operationally. Under the current framework, the gap between filing a request and receiving the A1 has long been a source of audit risk: an inspection that takes place between those two moments places the employer in an awkward evidential position. Going forward, the acknowledgement of receipt itself can be presented to host-country authorities pending issuance of the actual A1.

A genuine win: proportionality of national sanctions

Recital 40ba of the amending regulation contains what is, in our view, one of the most underrated wins of the entire reform. It provides that any national measure imposed for breach of the pre-notification obligation may not unjustifiably or disproportionately restrict free movement, and — crucially — cannot automatically result in a change of the applicable national legislation. The applicable legislation must continue to be determined in accordance with Title II of Regulation 883/2004.

This is a meaningful brake on the temptation, observable in some Member States, to use formal-compliance failures as a lever to assert host-country social security competence. The regulation now makes clear that the substantive conflict-of-laws rules govern, and that procedural penalties — while permissible — must remain proportionate. For groups dealing with disputed assignments and historical posting irregularities, this provides a useful argumentative anchor.

Codified substance test for the ‘registered office or place of business’

The reform tightens the substance assessment for posting employers, but in a way that should be familiar to anyone who has followed the case law of the Court of Justice (in particular Team Power Europe, C-784/19).

The amended Article 14(5a) of Regulation 987/2009 defines the registered office or place of business as the place where the essential decisions of the undertaking are adopted and where its central administration functions are carried out. New Article 14(5aa) requires this to be assessed on an overall basis, taking due account of factors relevant to the case. Recital 12a provides a non-exhaustive list of such factors: turnover, the places where general meetings are held, and the habitual nature of the activity pursued.

This codifies the anti-letterbox approach. For groups that operate cross-border employment structures via specific group entities, the documentation supporting the substance of the sending entity — board decisions, management presence, meaningful operational activity — becomes more important than ever.

Multi-state workers: mandatory reassessment every 24 months

A change that has received less attention but matters operationally: the determination of applicable legislation under Article 13 (workers active in two or more Member States) will now apply for a maximum period of 24 months, taking into account the situation projected for the following 12 months. After that period, the applicable legislation must be reassessed in light of the employee’s actual situation (new Article 14(10) of Regulation 987/2009).

For groups with truly multi-state populations — sales staff covering multiple countries, regional managers, remote workers splitting their working time across borders — this introduces a recurring compliance touchpoint. The temptation to issue a multi-state A1 once and forget about it will, going forward, no longer be tenable.

A1 challenges: a structured cooperation procedure

The reform introduces a detailed cooperation procedure for cases where a host-country institution doubts the validity of an A1 (new Article 19a of Regulation 987/2009). The procedure includes:

• A reasoned request from the receiving institution, supported by the documentation that gave rise to the doubt.
• A reconsideration by the issuing institution, which has 30 working days to either withdraw or rectify the document, or to provide the requesting institution with the available evidence (10 working days in duly substantiated urgent cases).
• Retroactive effect of any withdrawal or rectification, with explicit reference to the safeguard mechanism of Article 16 of Regulation 883/2004 in cases where retroactive removal of the document would create a disproportionate outcome (such as loss of insured status across all Member States concerned for the period in question).
• Where fraud is established, immediate withdrawal or rectification with retroactive effect.

Combined with a new general rule (Article 20(3) and (4)) that institutions must respond within 35 working days to inter-institutional queries on applicable legislation, the procedure should — in theory — bring more discipline to a process that has historically been extremely slow.

Transitional provisions: more comfort than the political timeline suggested

Article 3 of the amending regulation confirms that it will enter into force on the first day of the month following its publication in the Official Journal. Crucially, however, the most operationally relevant provisions — Article 12 of Regulation 883/2004 (posting) and Articles 14, 15, 16, 19a and 20 of Regulation 987/2009 (the implementing rules) — will apply only from 24 months after entry into force.

Even more importantly, Article 87b(7) of the amended Regulation 883/2004 contains a clear grandfathering rule: the current Article 12 will continue to apply to employees who were sent, and to self-employed persons who took up a similar activity in another Member State, before the date of application of the new rules. In other words, postings already in place when the new framework enters into force will continue to be governed by the existing rules until they end.

Realistically, this means that the new posting framework will not become applicable before 2028. The transitional architecture is more generous than a strict reading of the political deal would have suggested, and it provides employers with a meaningful preparation runway.

Wider coordination changes worth flagging

Beyond the posting overhaul, the final text contains a number of broader changes that HR, mobility and reward teams should be aware of:

• Long-term care benefits are now coordinated under a dedicated chapter, with their own definition (new Article 1(vb) of Regulation 883/2004) and a structured framework that codifies, in essence, the existing case law treating them as sickness benefits while accommodating their specific nature.
• Unemployment benefits aggregation will require an uninterrupted period of at least one month of insurance, employment or self-employment in the Member State concerned (new Article 61). For frontier and cross-border workers, the threshold for the Member State of last activity to be competent rises to 22 weeks of uninterrupted insurance (new Article 65(2)).
• The export period for unemployment benefits (the well-known three-month window) remains at six months, with Member States retaining the option to extend it up to the end of the entitlement period (amended Article 64(1)(c)).
• Family benefits intended to replace income during child-raising — listed exhaustively in the new Annex XIII — can be reserved exclusively to the parent subject to the legislation of the competent Member State (new Article 68b). Member States may opt to award such benefits in full without applying the differential supplement rule, and a number of Member States are already listed as having made that election (Estonia, Finland, Lithuania, Luxembourg, Sweden).
• Recovery of social security claims between Member States will be aligned on the model of Council Directive 2010/24/EU on mutual assistance for the recovery of tax claims, with a uniform instrument permitting enforcement (new Articles 78 to 85a of Regulation 987/2009). For groups with legacy disputes spanning multiple Member States, this is a meaningful change.
• The reform repeatedly references the European Labour Authority (ELA), the Electronic Exchange of Social Security Information (EESSI), the ESSPASS initiative and the European Digital Identity Wallets under Regulation (EU) 2024/1183. The direction is clearly towards real-time, digital verification of A1s across borders.

What employers should do now

Our earlier preparatory recommendations remain valid, and the final text reinforces them. We would highlight five action points:

• Map your current posting population against the three-month prior affiliation requirement and the generalised 24-month / 2-month cooling-off rule. The grandfathering provision in Article 87b(7) is generous — but only for assignments already in place; it does not help with future deployments.
• Review your business-trip vs. posting taxonomy. The new definition of ‘business trip’ is helpful but specifically excludes service provision and goods delivery. Internal travel policies should be updated to reflect that distinction, and to flag construction-sector activities for which no short-trip exemption applies.
• Audit substance at the level of the sending entity. The codified factors (essential decisions, central administration, turnover, place of general meetings, habitual nature of activity) provide a clear scorecard. For group structures relying on specific entities to host posted populations, this exercise is best done before — not after — the first audit under the new regime.
• Plan for systematic reassessment of multi-state A1s every 24 months. Build the trigger into your HR information systems now, while there is time to do so cleanly.
• Update your A1 challenge playbook. The new Article 19a procedure, with its 30-working-day deadlines and explicit references to Article 16 agreements, gives employers stronger procedural tools. Use them — but use them with the right evidence pack ready.

How we can help

The PKF BOFIDI Legal team advises Belgian and international groups on the full lifecycle of cross-border employment: assignment structuring, A1 management, audit defence, remediation of legacy posting arrangements and compliance design for international mobility programmes.

We will continue to track the formal adoption of the regulation, its publication in the Official Journal and the implementing acts that the Commission is empowered to adopt under the new Article 76a of Regulation 883/2004. We are happy to assist with impact assessments, structural reviews and the design of practical action plans tailored to your organisation.

For a conversation on what this reform means for your business, do not hesitate to reach out.

This article reflects the state of the legislative process as of 29 April 2026 and is based on the consolidated compromise text (Council document 8387/26 ADD 1) confirmed by Coreper on the same date. The final text remains subject to formal adoption by the European Parliament and the Council and to publication in the Official Journal. Nothing in this article constitutes legal advice; please consult your legal advisor for guidance tailored to your specific circumstances.