Working From Home in Luxembourg: Tax Rules for Expats & Frontaliers

Remote work has changed the tax landscape for Luxembourg's 200,000+ cross-border workers.

The 25-Day Rule (General)

Frontaliers can work from home for up to 25 days per year without affecting their Luxembourg tax status. Days worked outside Luxembourg — home country OR third country — all count toward this limit.

Country-Specific Updates for 2026

Belgium (Updated) A new protocol allows Belgian frontaliers up to **34 working days** remotely.

France The 25-day rule remains. Working beyond 25 days from France means those excess days become taxable in France.

Germany Still 25 days. Germany and Luxembourg are negotiating further flexibility.

Home Office Deductions for Luxembourg Residents

• Forfeit: €540/year (included in professional expenses)
• Actual costs: rent proportion, internet, energy — requires a dedicated room used exclusively for work

Practical Tips

1. Keep a day-count log — document every day worked outside Luxembourg
2. Notify your employer — some employers restrict remote work to avoid PE risk
3. Check social security — after 25% of working time from home, social security may switch to home country