How do I calculate my Luxembourg income tax?

Enter your annual gross salary, marital status, and number of children in LuxTax Optimizer's free tax calculator. It uses official 2026 Luxembourg tax brackets and social security rates to give you an instant, accurate estimate.

Can frontier workers from France, Belgium or Germany use this calculator?

Yes. LuxTax Optimizer supports frontier workers (travailleurs frontaliers) from France, Belgium and Germany with specific tax residency handling.

Is LuxTax Optimizer free?

The basic tax calculator is completely free. Premium plans offer advanced features like AI optimization, scenario planning and deduction tracking.

What is LuxTax Optimizer?

Effortlessly manage your Luxembourg taxes. Get personalized suggestions to lower your tax burden based on your salary, marital status, and dependents.

Learn About Tax

Simple explanations of how Luxembourg tax works — no jargon, no accountant needed

The Basics Explained

Practical Guides to Pay Less Tax

What Does Each Thing Mean?

Plain-English explanations of every field in the calculator — limits, examples, and what you can actually claim.

Frequently Asked Questions

File Your Taxes on MyGuichet.lu

📋How to Upload Your Taxes to MyGuichet.lu

MyGuichet.lu is Luxembourg's official online tax portal. Follow this step-by-step guide to file your tax declaration electronically.

Go to MyGuichet.lu

Important Reminders

Keep a copy

Always save your confirmation receipt and assessment letter

File on time

Late filing can result in penalties of €100-€500

Keep records

Maintain receipts and documentation for at least 5 years

Use LuxTax Optimizer first

Calculate your taxes and organize your deductions before filing on MyGuichet

Official Resources

→ Luxembourg Tax Portal → Direct Tax Administration (ACD)→ Deductions & Allowances Guide → Full Income Tax Law (LIR)