Luxembourg Salary Tax Calculator

How Luxembourg Income Tax Works in 2026

Luxembourg uses a progressive income tax system, meaning higher income is taxed at higher rates. For 2026, there are 21 tax brackets ranging from 0% on the first €11,265 of income up to 40% on income exceeding €200,000. The system is administered by the Administration des contributions directes (ACD).

Tax Classes Explained

Every Luxembourg taxpayer is assigned a tax class which determines which brackets apply and what credits you receive:

• Class 1: Single persons, divorced, or separated individuals without children. Standard brackets apply.
• Class 1A: Single parents, widowed persons. Same brackets as Class 1 but with an additional tax credit (CIM — Crédit d'impôt pour parent isolé) of €750 per year.
• Class 2: Married couples and PACS partners filing jointly. Benefits from income-splitting (quotient familial): the combined income is divided by 2, taxed, then doubled. This significantly reduces the effective rate for couples with income disparity.

Social Security Contributions in Luxembourg

Before income tax is applied, employees pay social security contributions which are deductible from gross income:

• CNS (Caisse nationale de santé): 3.05% for health insurance. Capped at the social security ceiling (approx. €154,251 annual in 2026).
• Pension contribution:8% of gross salary, also capped at the social security ceiling. This funds Luxembourg's general pension scheme.
• Dependency insurance: 1.4% of gross salary. Unlike CNS and pension, there is no ceiling — this applies to the full gross salary.

Total employee social contributions are typically around 12–14% of gross salary for most income levels.

Deductions from Taxable Income

After social contributions, several deductions reduce your taxable income:

• Professional expenses forfeit (frais professionnels): A flat deduction of €540/year or 2% of gross income, up to a maximum of €2,700. For commuters with significant travel expenses, actual costs may be deductible with documentation.
• Special expenses (dépenses spéciales): A forfeit of €480/year covering life insurance premiums, supplementary pension contributions, and similar items. Actual amounts may be deductible if higher.

Tax Credits (Crédits d'impôt)

After calculating income tax, Luxembourg applies several credits that directly reduce the tax payable (not just the taxable base):

• CIS (Crédit d'impôt salarié): Up to €300/year for employed taxpayers (€600 for Class 2 couples). This ensures low earners pay minimal or no income tax.
• CIM (Crédit d'impôt monoparental): An additional €750 credit for Class 1A taxpayers (single parents and widowed persons).

The Solidarity Surtax

Luxembourg applies a solidarity surtax on top of income tax. For most taxpayers, this is 7% of the final income tax amount (after credits). For incomes above €150,000, the rate increases to 9%. This surtax was introduced to balance the budget and fund social protection measures.

Example: If your income tax after credits is €8,000, the solidarity surtax is €560 (7% × €8,000). Your total income tax liability is €8,560.

Monthly Pay Calculations

Luxembourg employers typically divide the annual tax liability by 12 for monthly withholding. Your payslip will show the monthly deductions under the following lines:

• Salaire brut (gross salary)
• Cotisation CNS (health)
• Cotisation pension (retirement)
• Cotisation dépendance (dependency)
• Impôt sur le revenu (income tax)
• Salaire net (net salary)

Frontaliers and Cross-Border Workers

If you live in France, Belgium, or Germany and commute to work in Luxembourg, special tax treaties apply. As a frontalier, you generally pay income tax in Luxembourg (the country where you work) rather than your country of residence. However:

• French frontaliers: taxed in Luxembourg under the France-Luxembourg tax treaty (last revised 2019).
• Belgian frontaliers: full tax in Luxembourg; Belgium has information exchange but does not re-tax.
• German frontaliers: taxed in Luxembourg, but must file a declaration in Germany for global income reporting (Welteinkommenserklärung).

Official Resources

• Administration des contributions directes (ACD)
• guichet.lu — official Luxembourg resident portal
• CNS — Caisse nationale de santé

Frequently Asked Questions