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Luxembourg Tax Insights


Luxembourg’s 2028 Tax Reform: What the New Single Tax Class Could Mean for You
For many single taxpayers and dual-income couples, the proposed system could reduce income tax. For couples with one income or a significant difference between their incomes, however, the existing class 2 system may remain more favourable. The draft therefore includes a long transitional period for qualifying couples already married or in a registered partnership before 2028. Luxembourg is preparing a fundamental reform of personal income taxation. Under draft Bill 8676, the
7 min read


Form 100 or Annual Adjustment? Choosing the Right Luxembourg Tax Filing
Luxembourg employees often use the expressions "tax return" and "annual adjustment" as if they mean the same thing. They do not. Form 100 and Form 163 are different procedures with different eligibility rules, scope and possible outcomes. Choosing the correct route is the first step in preparing a filing. Form 100: a full income tax assessment Form 100 is the Luxembourg personal income tax return used for taxation by assessment. It covers the taxpayer's relevant income catego
3 min read


10 Common Luxembourg Tax Return Mistakes — and How to Avoid Them
Most tax-return mistakes are not caused by complex calculations. They arise because information is incomplete, a filing route is misunderstood or an amount is entered without considering the rule behind it. Here are ten recurring errors to check before submitting a Luxembourg personal income tax return. 1. Assuming that pre-filled information is complete Electronic and simplified returns can include salary and pension information, but they do not remove the taxpayer's respons
4 min read
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