Belgium Employment Law Reforms 2026, What Employers Must Change for International Mobility and Restructurings

Belgium’s 2026 employment law reforms represent the most consequential package of labour legislation changes in over a decade, and employers running international mobility programmes or restructurings must act now to stay compliant. A new 52-week cap on employer-initiated notice periods, reformed voluntary overtime rules, updated part-time minimum hours requirements, the abolition of certain night-work bans, and stricter chain-liability provisions for cross-border assignments have all entered into force or reached advanced draft stage during 2026. This guide provides the practical, step-by-step playbook that General Counsels, HR directors and global mobility teams need: what to change, how to change it, and by when, covering Belgium employment law reforms 2026 with a specific focus on international mobility and restructuring implications.

TL;DR, What Employers Must Do Now

The Belgium employment law reforms 2026 require immediate action across multiple HR and legal workstreams. Use this checklist to prioritise the most time-sensitive tasks.

• Recalculate notice-period budgets. For contracts commenced from the relevant 2026 effective dates, employer-initiated notice periods are now capped at 52 weeks. Review every pending and planned termination for cost impact.
• Update voluntary overtime policies. Revised consent, recording and compensation rules took effect on 1 April 2026. Adjust time-tracking systems and employee communications immediately.
• Revise assignment letters and secondment agreements. New chain-liability provisions and minimum salary thresholds affect cross-border employee transfers into and out of Belgium.
• Amend work regulations for part-time and flexible working. Draft legislation on part-time minimum hours and flexible scheduling is at an advanced stage, prepare revised regulations and consult staff representatives now.
• Review collective dismissal timetables. The notice-period cap changes the financial modelling and sequencing of group restructurings. Recalculate severance reserves and works-council consultation timelines.
• Check mobility budget compliance. Employer obligations around the mobility budget have been active since 1 January 2026, verify payroll and benefit-statement accuracy.
• Audit night-shift scheduling. The abolition of certain night-work bans creates new flexibility but also new health-and-safety documentation obligations.

Key Belgium Employment Law 2026 Reforms, Summary and Effective Dates

The 2026 legislative package contains several distinct reforms, each with its own effective date and legislative status. Employers must track which measures are already in force, which have been formally adopted and await implementation, and which remain in draft. The table below consolidates the key dates and required employer actions.

Legislative Status and Effective Dates, What Is Already in Force vs. Draft

Some reforms, notably the mobility budget obligations and certain social-security coordination updates, have been active since the start of 2026. The voluntary overtime reform was government-approved and entered into force on 1 April 2026. The notice-period cap to 52 weeks for employer-initiated terminations applies to employment contracts commencing on or after the specified 2026 date. Flexible working and part-time minimum-hours proposals remain at an advanced draft stage.

Industry observers expect remaining draft provisions to be finalised by late 2026. Employers should not wait for final gazette publication to begin preparing revised policies and internal communications.

Notice Period Changes Belgium 2026, What Changed and How This Affects Restructurings

The notice-period reforms are the single most impactful change for employers planning restructurings, collective dismissals or individual terminations. Under Belgium’s existing regime, notice periods for employer-initiated dismissals increase with seniority and have no absolute maximum, meaning long-tenured employees can accrue very lengthy (and costly) notice obligations. The 2026 reform introduces a hard cap.

The 52-Week Cap, Who It Affects and How to Plan

For employment contracts commencing on or after the specified 2026 date, the maximum notice period in the case of dismissal by the employer is capped at 52 weeks. This cap becomes relevant for employees with 17 or more years of seniority, the point at which, under the existing progressive scale, notice periods would otherwise continue to rise. Above this 52-week limit, no additional notice period can be accrued.

For employee-initiated resignations, the existing maximum of 13 weeks continues to apply regardless of the contract start date, as confirmed by the Federal Public Service Employment.

Separately, a draft law proposes to reduce the notice period to one week during the first six months of the employment contract. This effectively reintroduces a form of trial period, which was abolished in Belgium in 2014. Where termination during the first six months is initiated by the employer, the notice period would range from one to five weeks depending on precise seniority. Where the employee initiates, a shorter reciprocal period applies.

Example Notice Calculation, Employee with 18 Years’ Seniority

Consider an employee whose employment contract commenced on or after the relevant 2026 date and who accumulates 18 years of seniority before being dismissed by the employer:

• Pre-reform scenario: Under the existing progressive scale, the notice period for an employee with 18 years’ seniority would exceed 52 weeks (typically reaching 56–62 weeks depending on precise start date and calculation methodology).
• Post-reform scenario: The notice period is capped at 52 weeks. The employer saves the cost equivalent of 4–10 weeks of salary and benefits.
• Payroll impact: For an employee earning €80,000 per annum (gross), each week of notice represents approximately €1,540 in gross cost (before employer social-security contributions of approximately 25%). Saving even four weeks translates to over €7,700 in direct payroll cost, before factoring in social-security charges and administrative overhead.

The likely practical effect for restructurings will be a meaningful reduction in total severance exposure for employers with a significant population of long-tenured staff. Early indications suggest that this reform alone could reduce aggregate termination budgets by 5–15% in large restructuring programmes.

Operational Checklist for Restructurings

• Identify affected employees. Segment the workforce by contract start date and seniority to determine which employees fall under the new cap vs. the legacy regime.
• Recalculate termination budgets. Model the financial impact of the 52-week cap on each planned dismissal; update board-level budget approvals accordingly.
• Update template termination letters. Ensure notice-period references in standard dismissal letters reflect the new cap for eligible contracts.
• Coordinate with works councils. If collective dismissals are planned, align the revised notice-period calculations with information and consultation timelines.
• Consider severance-in-lieu strategies. Evaluate whether to serve notice or offer payment in lieu, factoring in the new cap and the employee’s willingness to negotiate an exit package.
• Document the calculation methodology. Retain clear records showing how each employee’s notice period was calculated, including contract start date and applicable seniority bracket, to defend against potential disputes.

International Mobility Belgium 2026, Cross-Border Transfers, Thresholds and Chain Liability

The 2026 reforms have direct and far-reaching implications for international mobility programmes. Employers assigning employees into or out of Belgium, whether on secondment, local hire or intra-group transfer, must update their mobility frameworks to reflect new minimum salary thresholds, stricter chain-liability rules and refreshed social-security coordination requirements.

Minimum Salary Thresholds and Permit Exemptions

Reports from leading Belgian employment advisers indicate that the minimum salary threshold relevant to certain international-employment exemptions has been adjusted. Industry observers note a reference threshold in the region of €70,000 for specific permit or exemption categories. Employers relying on salary-based exemptions to simplify work-permit processes should verify current thresholds against the latest official publications and assess whether existing assignees still meet the required levels.

The practical consequences are significant: an employee whose total remuneration package falls below the revised threshold may lose eligibility for expedited permit processing or particular tax advantages associated with the special tax status for foreign executives and specialists. Payroll teams must recalculate total compensation packages, including housing allowances, school fees and home-leave benefits, against the new thresholds.

Chain Liability and Subcontracting Risks

Stricter chain-liability provisions mean that Belgian entities engaging foreign contractors or seconding staff through intermediary arrangements face increased exposure. Under the reinforced rules, the principal employer can be held jointly liable for the employment-law obligations of subcontractors further down the chain, including unpaid wages, social-security contributions and notice-period obligations.

For cross-border employee transfers, this means that any arrangement involving a Belgian host entity and a foreign sending entity must be structured to clearly delineate employment responsibilities. Secondment agreements should explicitly allocate social-security registration, payroll withholding and termination obligations between the parties.

Checklist, Updating Assignment Letters, Secondment Agreements and Mobility Policies

• Review salary thresholds. Confirm that each assignee’s total compensation meets the applicable minimum threshold for the relevant permit or exemption category.
• Insert chain-liability clauses. Add explicit provisions to secondment agreements allocating responsibility for wage payments, social-security contributions and termination costs.
• Verify A1 certificates. Ensure that all posted workers hold valid A1 social-security certificates and that these are renewed before expiry.
• Update payroll withholding. Confirm that the Belgian entity is correctly withholding income tax and social-security contributions for all assignees, factoring in any changes to withholding rates or reporting obligations effective in 2026.
• Audit local-hire vs. secondment structures. Assess whether existing arrangements remain compliant under the stricter chain-liability regime or whether restructuring to direct local employment is more appropriate.

When to Use Secondment vs. Local Hire vs. Terminate-and-Rehire

The choice of cross-border employee transfer structure depends on several factors that have shifted under the Belgium employment law reforms 2026:

• Secondment remains appropriate where the assignment is genuinely temporary (typically under 24 months), the home-country employer retains substantive control, and the employee’s total compensation meets Belgian minimum thresholds. However, chain-liability exposure has increased.
• Local hire may be preferable where the assignment is long-term or permanent, the role reports entirely into the Belgian entity, or the employer wishes to avoid chain-liability complications.
• Terminate-and-rehire should be considered where the employee’s home-country contract contains legacy terms incompatible with Belgian requirements, but this route triggers termination-cost exposure in the home jurisdiction and must be carefully modelled.

Part-Time, Flexible Working and Overtime Reforms Belgium 2026

The 2026 package introduces targeted reforms to part-time employment, flexible scheduling and voluntary overtime, each requiring concrete policy and contractual updates from employers.

Part-Time Minimum Hours 2026 Belgium, Contract Clause Updates

Draft legislation proposes changes to minimum-hours requirements for part-time workers. Although the final text is pending, employers should begin reviewing existing part-time contracts to identify any that fall below the anticipated thresholds. Industry observers expect the reforms to raise the minimum weekly hours or set stricter conditions for derogations, reducing the prevalence of very-low-hour contracts.

Employers with significant part-time workforces, particularly in retail, hospitality and logistics, should prepare alternative contract templates that comply with both the current regime and the anticipated new requirements.

Voluntary Overtime Reform, What Employers Must Change

The voluntary overtime reform, which entered into force on 1 April 2026, modifies the rules around employee consent, hour recording and compensation for overtime hours worked on a voluntary basis. Key changes include:

• Consent requirements. Employee agreement to voluntary overtime must now be documented in writing for each six-month period, rather than through open-ended standing consent.
• Time recording. Employers must maintain detailed, contemporaneous records of all voluntary overtime hours, paper-based or digital, accessible to social inspectors on request.
• Compensation. Overtime premiums and compensatory rest rules have been tightened; employers should verify that payroll systems are correctly applying the updated rates.

Abolition of Certain Night-Work Bans

The general ban on night work is being reformed, with certain prohibitions abolished from 1 June 2026 to facilitate e-commerce and logistics operations. Employers introducing or expanding night shifts must update their work regulations, conduct risk assessments, and ensure compliance with health-and-safety obligations specific to nocturnal scheduling (including medical surveillance and rest-period guarantees).

Sample Policy Language for Flexible Working Rules Belgium 2026

Employers should consider inserting the following types of provisions into updated work regulations:

• Voluntary overtime consent clause: “The employee agrees to perform voluntary overtime hours for the period from [date] to [date], subject to the limits and conditions set out in the applicable collective bargaining agreement and work regulations. This consent is valid for a maximum of six months and must be renewed in writing.”
• Flexible scheduling clause: “Work schedules may be varied by the employer with [X] days’ notice, provided that the total weekly working hours do not fall below [minimum] or exceed [maximum] as specified in the applicable work regulations.”
• Night-work health-and-safety clause: “Employees assigned to night shifts shall undergo a medical examination prior to commencement and at intervals of no more than [12] months thereafter, in accordance with the Code on Well-being at Work.”

Collective Dismissals Belgium 2026, Procedure, Notices and Risk Mitigation

The interaction between the notice-period cap and Belgium’s collective dismissal regime creates both opportunities and risks for employers planning group restructurings. A well-sequenced process is essential to manage cost exposure, maintain legal compliance and minimise disruption.

How Notice-Period Changes Interact with Collective Dismissal Thresholds

Belgium’s collective dismissal rules (implementing EU Directive 98/59/EC) require employers to follow specific information, consultation and notification procedures when terminating a defined number of employees within a specified period. The notice-period cap does not change the headcount thresholds triggering collective dismissal obligations, but it does affect the financial modelling of each individual termination within the collective process.

For long-tenured employees, the 52-week cap reduces the per-employee cost, potentially freeing budget to offer enhanced voluntary departure packages or fund redeployment initiatives. Conversely, the shorter notice periods during the first six months (if enacted) could encourage employers to act more quickly on recent hires, but this also risks triggering collective dismissal thresholds if multiple probationary terminations occur simultaneously.

Works Council and Staff Representative Consultation

Employer obligations around consultation remain unchanged in structure but require updated documentation. Key steps include:

• Phase 1, Information. Provide the works council (or, in its absence, the trade-union delegation or the Committee for Prevention and Protection at Work) with written notification of the intended collective dismissal, including the reasons, the number and categories of employees affected, the selection criteria, the proposed timing and the method of calculating severance.
• Phase 2, Consultation. Engage in genuine consultation with a view to reaching agreement on measures to avoid or reduce dismissals, and to mitigate the consequences (redeployment, retraining, outplacement, voluntary departure incentives).
• Phase 3, Notification. Notify the regional employment service (VDAB, Actiris, Forem or ADG depending on region) at least 30 days before the first dismissal takes effect. No terminations may be executed during this 30-day waiting period.

Step-by-Step Timeline for a Group Restructuring

Practical Documents and Templates

The following template outlines and clause snippets are designed to help in-house teams implement the Belgium employment law reforms 2026 efficiently. Each should be reviewed by local counsel before use.

Assignment Letter Checklist

• Assignee name, home-country employer and Belgian host entity
• Assignment start and end dates; extension mechanism
• Applicable law and jurisdiction clause
• Total compensation breakdown (confirm against minimum salary thresholds)
• Social-security allocation (reference A1 certificate number)
• Chain-liability allocation clause (see sample below)
• Notice-period provisions (reference the 52-week cap where applicable)
• Repatriation and early-termination provisions

Sample Secondment Clause, Social Security and Chain Liability

“The Sending Employer shall remain responsible for registering the Employee with the competent social-security institution in [home country] and for obtaining and maintaining a valid A1 certificate for the duration of the assignment. The Host Entity shall be jointly and severally liable for the payment of wages and social-security contributions to the extent required by Belgian law, including but not limited to any chain-liability obligations arising under [applicable legislative reference]. The parties shall cooperate to ensure timely payroll withholding and reporting in both jurisdictions.”

Voluntary Overtime Policy Snippet

“Voluntary overtime may be performed only with the prior written consent of the employee, renewed every six months. The employer shall record all voluntary overtime hours in a dedicated time-registration system accessible to social inspectors. Compensation for voluntary overtime shall comply with the rates and compensatory rest requirements set out in the applicable collective bargaining agreement and work regulations, as amended effective 1 April 2026.”

Termination Notice Template, Key Fields

• Employee name and contract start date
• Applicable notice period (calculated under the new regime, citing the 52-week cap where relevant)
• Notice start date (always the Monday following notification)
• Notice end date
• Option for payment in lieu of notice (if applicable)
• Reference to outplacement and reclassification obligations

Risk Matrix, Enforcement, Penalties and Litigation Hot Spots

Failing to comply with the Belgium employment law reforms 2026 exposes employers to a range of financial, administrative and reputational risks. The matrix below maps common breaches to their likely consequences.

Red Flags Checklist, Document Retention, Communications and Payroll Evidence

• Retain all notice-period calculations with supporting contract start dates and seniority records for a minimum of five years post-termination.
• Archive voluntary overtime consent forms and time-registration records for at least the statutory limitation period.
• Keep copies of works-council consultation minutes and all written notifications to regional employment services.
• Maintain A1 certificates and social-security correspondence for all international assignees, accessible for inspection.
• Store payroll records demonstrating correct withholding, overtime compensation and minimum-hours compliance.

Conclusion and Next Steps

The Belgium employment law reforms 2026 touching international mobility and restructuring demand prompt, coordinated action across legal, HR, payroll and mobility functions. Employers that delay risk miscalculated notice periods, non-compliant overtime practices, chain-liability exposure and procedural errors in collective dismissals, each carrying material financial and reputational consequences. The reforms also create opportunities: the 52-week notice cap reduces long-tail termination costs, flexible-working changes support operational agility, and the night-work reform unlocks new scheduling options for logistics and e-commerce operations. In-house teams should use the checklists, templates and timelines in this guide as a starting point, and engage Belgian employment counsel promptly to tailor implementation to their specific workforce profile and commercial objectives.

Sources

1. Federal Public Service Employment, Labour and Social Dialogue, Notice Periods
2. Vandelanotte, Notice Periods for Dismissal: What Changes Are Coming
3. BDO Belgium, Amendments to Various Employment Provisions on 1 June 2026
4. Crowell & Moring, Belgian Government Introduces Draft Labor Law Reform
5. Van Olmen & Wynant, Upcoming Act on Key Amendments to Labour Law
6. Securex, Shorter Terms of Notice During the First 6 Months