From gross to net: how your net salary is calculated in Luxembourg

The scales in the collective agreement for the care and social sector set gross amounts. That is what this site calculates, that is what your contract states, and that is the only thing the agreement determines. Net pay, by contrast, does not depend on the agreement: it depends on your personal situation. This is why no collective-agreement calculator can give you your net pay to the euro.

Between gross and net there are two separate deductions, not one: first social contributions, identical for every employee, then tax, which depends on you.

1. Social contributions: 12.95% in 2026

This is the simple part: the rates are the same for everyone, whatever your salary or family situation.

Branch	Employee rate	Calculation base
Health and maternity insurance	3.05%	gross salary
Pension insurance	8.50%	gross salary
Dependency insurance	1.40%	gross after allowance
Total	12.95%

The pension insurance rate changed on 1 January 2026: it rose from 8.00% to 8.50% as part of the pension reform. If you compare your December 2025 payslip with your January 2026 one, that is where the difference sits.

Dependency insurance follows a rule of its own: it is borne by the employee alone, and it applies only to the portion of pay above an allowance equal to a quarter of the minimum social wage. The effective burden is therefore slightly below 12.95%. Health and pension insurance are also capped at five times the minimum social wage — a ceiling the CCT SAS career levels do not reach.

A worked example

On a gross salary of €4,000 per month, health and pension insurance account for 11.55%, or €462. Dependency insurance adds 1.40% on the amount above the allowance, roughly €46. Taxable pay therefore comes out at around €3,490.

And only at that point does tax come in.

2. Tax: this is where situations diverge

Income tax is withheld at source by your employer, based on your tax withholding form. Three main factors set the amount:

• Your tax class — broadly, class 1 for a single person without children, class 1a for a single person with a child or aged over 64, class 2 for married couples or partners taxed jointly. At equal gross pay, the net gap between two classes runs into hundreds of euros a month.
• The progressive scale, which rises in bands: each additional euro is not taxed at the same rate as the one before it.
• Your tax credits and allowances — commuting costs, loan interest, old-age provision contributions, extraordinary expenses. These depend entirely on your own file.

This is why two colleagues in the same post, with the same seniority and therefore exactly the same gross pay, can take home very different net amounts.

The cross-border worker case

If you live in France, Belgium or Germany and work in Luxembourg, your salary is in principle taxed in Luxembourg under the double-taxation treaties. You nonetheless remain required to declare your income in your country of residence, and both your Luxembourg tax class and the options open to you depend on your family situation and on the share of your income earned in Luxembourg. This point deserves individual examination: it changes the outcome substantially.

Where to get a reliable figure

For an estimate of your tax, use the Ministry of Finance tax calculator. For your exact situation, your tax withholding form and the annual statement from the tax administration are authoritative.

And to know your gross pay — the figure the collective agreement guarantees you, with your seniority and your supplements — that is exactly what this site's calculator is for.

The contribution rates quoted are those in force in 2026 and may be changed by law. This page explains a method; it replaces neither your payslip nor individual tax advice.