On 6 April the legal portal Lexgo published Circular 2026/C/51, through which Belgium’s tax authority clarifies sweeping improvements to the special expatriate regime for inpatriate employees and researchers. Key fiscal perks—including a tax-free allowance that rises from 30 % to 35 % of gross pay and the removal of the €90,000 annual cap—apply retroactively to 1 January 2025. Importantly, employers may amend existing contracts up to 30 June 2026 to apply the new parameters, provided labour-law formalities are observed. The minimum salary threshold for the standard inpatriate track (BBIB) drops from €75,000 to €70,000, making the scheme accessible to a wider pool of mid-senior specialists. PwC Belgium, which helped draft the guidance, notes that payroll departments must issue corrective payslips and wage-tax returns when back-dating benefits. While the fiscal changes increase Belgium’s attraction for mobile talent, the National Social Security Office has yet to align fully: it still caps the allowance at 30 % even though it now recognises the lower salary threshold.
![Belgian Tax Circular Expands Inpatriate Regime—Retroactive Contract Changes Now Allowed]()
VisaHQ can also support companies and assignees navigating Belgium’s refreshed expatriate framework. Its dedicated portal (https://www.visahq.com/belgium/) offers step-by-step guidance on work-permit, visa and residence-card applications, helping HR teams synchronise immigration paperwork with the new tax and payroll rules so employees can hit the ground running.
The resulting mismatch means some employers could face higher social-security contributions unless further harmonisation is secured. Global mobility managers should run scenario analyses before retroactively lowering headline salaries; in some cases, the higher tax-free allowance may outweigh social-security differentials, but not always. Companies bringing staff on short notice for EU projects may also see faster work-permit approvals, as regional authorities treat the improved regime as evidence of Belgium’s commitment to talent competitiveness.
VisaHQ can also support companies and assignees navigating Belgium’s refreshed expatriate framework. Its dedicated portal (https://www.visahq.com/belgium/) offers step-by-step guidance on work-permit, visa and residence-card applications, helping HR teams synchronise immigration paperwork with the new tax and payroll rules so employees can hit the ground running.
The resulting mismatch means some employers could face higher social-security contributions unless further harmonisation is secured. Global mobility managers should run scenario analyses before retroactively lowering headline salaries; in some cases, the higher tax-free allowance may outweigh social-security differentials, but not always. Companies bringing staff on short notice for EU projects may also see faster work-permit approvals, as regional authorities treat the improved regime as evidence of Belgium’s commitment to talent competitiveness.
