Luxembourg tax card: issue, use and correction

The Luxembourg tax card tells the employer which tax class or rate and which recorded deductions must be used for wage tax withholding. It is an operational payroll document, not a complete annual tax assessment. ^{[1] [2]}

An electronic multi-year card

Tax cards are made available electronically. Employees no longer hand a paper original to the employer, and employers retrieve new or amended cards through the professional MyGuichet.lu process. A card remains applicable until it is replaced or reaches an applicable end date. ^{[3] [4]}

Automatic issue after CCSS affiliation

For a new employee affiliated with the Joint Social Security Centre, the initial card is normally produced from the available registration information. The published average processing time is 30 working days after the employer's affiliation declaration. ^[5]

The employer must have the correct national identification information. A mismatch can delay issue or prevent the expected card from being retrieved.

Residents and non-residents

Residents and non-residents use different request procedures and forms where a manual request or change is required. The correct 2026 form and supporting documents depend on residence and the requested amendment. ^{[6] [7]}

Some changes can be reflected automatically from official records; others require a request. Employees should not assume that a family or cross-border change has already reached payroll. ^{[8] [9]}

Main and additional cards

The highest and most stable income normally receives the main card. Additional salaries or pensions use additional cards. Standard additional-card rates are: ^[10]

These rates can be adapted through the applicable request procedure. They are not a substitute for checking the electronic card actually used.

No valid card

Without a valid tax card, the employer applies class 1 and withholding cannot be lower than 33% of semi-net remuneration. This protective rule can produce a much lower take-home amount until the situation is corrected. ^[11]

Correction checklist

1. Compare the card data with the payslip and identify the employer concerned.
2. Determine whether the issue concerns civil status, residence, class, main/additional allocation, a deduction or a rate.
3. Use the appropriate resident or non-resident 2026 procedure.
4. Attach only the supporting evidence requested by the authority.
5. Check that the amended card becomes available to the employer and is used in payroll. ^{[12] [13]}

Recovering excess withholding

An amended card may allow payroll correction from its effective date. Otherwise, an annual adjustment or tax return may be needed under the relevant conditions. A corrected card does not by itself settle every previous or foreign-tax obligation. ^{[14] [15]}

Read salary withholding tax, the payslip guide, or open the gross-to-net calculator.