Luxembourg tax classes 2026: class 1, 1a or 2

Luxembourg tax class is not selected according to salary. It mainly follows family status, age, entitlement to a child-related tax moderation and the taxation method applying to a couple. The three principal resident classes are 1, 1a and 2. ^[1]

Tax classes 1, 1a and 2 at a glance

This is a practical summary, not a substitute for the tax card. Separation, a recent marriage, individual taxation or a cross-border situation can change the applicable class or replace it with a rate.

Who generally falls within class 1?

Class 1 is the residual category: it covers taxpayers who do not meet the requirements for class 1a or class 2. A single person without an eligible child and under 64 at the start of the tax year will generally be in this class. ^[1]

Being married does not automatically produce class 2. Individual taxation or different countries of residence can result in class 1, class 1a or a rate being entered on the tax card.

Who may qualify for class 1a?

Class 1a covers specified situations, including widowed taxpayers, people entitled to a child tax moderation and people who have reached age 64 at the start of the tax year, provided they do not fall within class 2. ^[1]

Having a child does not by itself prove that class 1a applies. Entitlement to the moderation, household circumstances and the information held by the Luxembourg Inland Revenue must be checked.

How does class 2 work?

Class 2 is connected with joint taxation in the situations laid down by law. It uses income splitting: tax is twice the class 1 amount calculated on half of the household’s adjusted taxable income. ^[2]

Splitting can reduce progression when the two incomes are very different. It does not mean that each salary is permanently taxed on its own at a preferential rate. Monthly withholding remains an advance, while the annual result depends on household income and deductions.

A simple splitting example

For combined adjusted taxable income of €80,000, the principle is to:

1. calculate the class 1 amount on €40,000;
2. multiply that amount by two;
3. apply the additions and credits relevant to the household.

This illustrates the mechanism, not a final tax figure. Taxable income is not the same as gross salary and household deductions can change the base.

Residents and non-residents

A married cross-border worker does not automatically receive class 2. For a non-resident, the class or rate depends on the taxpayer’s situation and any election to be treated as equivalent to a resident. ^[3]

The rate on the monthly tax card and the final annual assessment must be distinguished. Foreign income of the employee or spouse can be relevant to resident-equivalent treatment or the applicable rate.

Why tax class changes monthly take-home pay

The employer applies the class or rate shown on the electronic tax card. Tax class affects wage-tax withholding, not the statutory social-contribution rates. Two people with the same gross salary can therefore receive different net payments while paying the same basic employee contributions.

Luxembourg publishes the annual income-tax tariff and the payroll withholding schedules separately. An annual estimate will not necessarily reproduce every monthly payslip to the cent. ^[4]

Checking or correcting a tax class

Start with the tax card available through MyGuichet.lu or issued by the tax administration. Since 2022, the card has been transmitted electronically to the employer. ^[5]

Check:

• the class or rate;
• whether the card is principal or additional;
• the recorded family situation;
• the validity period;
• any deductions or moderations.

If something is wrong, follow the Luxembourg tax-card guide. To compare the indicative impact of different classes, use the 2026 gross-to-net calculator.

Frequently asked questions

Can I freely choose class 1, 1a or 2?

No. The class follows legal criteria and the applicable taxation method. Some taxation options require an application, but taxpayers cannot simply select whichever schedule produces the lowest withholding.

Does class 2 guarantee lower final tax?

No. It changes the tariff mechanism and withholding, but final tax depends on all household income, deductions and eligibility conditions.

Does a new tax class automatically correct previous months?

Not always. Depending on the effective date and payroll processing, an annual adjustment may still be required.