Cross-border labor trends and tax risks in Belgium, France, and Luxembourg

Labor trends in the border regions of Belgium, France, and Luxembourg are shifting due to migration and complex tax regulations. In Belgium, over 85,500 residents work in neighboring countries, while the number of foreign workers in Belgium has reached 51,867. French citizens represent approximately 77 percent of the foreign workforce in Belgium, with significant concentrations in the Walloon regions of Namur and Hainaut.

Meanwhile, the cross-border workforce between France and Luxembourg faces significant tax risks related to teleworking. While many workers perform one or two days of remote work per week, the tax treaty between France and Luxembourg stipulates a strict 34-day limit for working from home without changing tax residency. If a worker exceeds this threshold—reaching the 35th day—the entire year's worth of remote work becomes taxable in France rather than Luxembourg. This creates a discrepancy for employees following standard two-day-per-week teleworking agreements, which can total roughly 96 days per year.