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Optimization of bonuses

What you can actually optimize when it comes to bonuses in Luxembourg — and what the law allows.

13/11/2025

Participative Bonus (Art. 115-13a L.I.R.)
An employer may grant certain employees a so-called participative bonus, allowing them to benefit from a 50% income tax exemption on part of the bonus, provided that specific conditions are met.

  • Maximum amount: The bonus may not exceed 25% of the employee’s annual gross remuneration (and this threshold increased to 30% starting in 2025).
  • For the employer: The total amount of participative bonuses granted cannot exceed 5% of the positive profit of the previous financial year (raised to 7.5% as of 2025).

Interest Subsidy / Interest Relief (Art. 115-22 L.I.R.)
An employer may also grant an employee a preferential-rate loan (interest relief / bonification) or reimburse the interest on their mortgage or personal loan (subsidy). Within certain limits, this support is exempt from income tax and social security contributions:

Applicable ceilings (for a taxpayer taxed individually):

  • Mortgage loan: up to €3,000 tax-exempt
  • Personal loan: up to €500 tax-exempt
    For jointly taxed households, the ceilings are doubled: up to €6,000 and €1,000 respectively. This scheme requires the employer to keep a supporting file (contract, statements, etc.).

Young Employee Bonus (Art. 115-13d L.I.R.)
Starting from tax year 2025, a new benefit allows employees under 30 years old, holding their first permanent employment contract (CDI), to receive a partially tax-exempt bonus (up to 75% exemption) under certain conditions.
Annual ceilings based on gross remuneration:

  • ≤ €50,000: up to €5,000
  • €50,001 to €75,000: up to €3,750
  • €75,001 to €100,000: up to €2,500