Personal taxation · Luxembourg
Tax assessment objection in Luxembourg: deadline and steps
An objection targets an identified tax decision and must comply with the applicable deadline and formalities. The general procedure described by Guichet.lu provides for three months from notification. A request for information or an informal exchange is not automatically a valid objection.
Financial Services Luxembourg · Licensed accountant · Head of the firm: Mickaël LOC. Editorial update: .
Start with the decision and its notification
Note the type of decision, the year, the amount disputed and the grounds. The date of notification must be determined according to the situation; do not replace it with the date on which you come across the document.
Keep the envelope and any useful evidence of delivery. Sending within Luxembourg and notification abroad may involve different formalities.
Preparing the objection file
- Identify the taxpayer and the decision being challenged.
- Explain the points of fact and law concerned.
- Set out the correction requested and its calculation where available.
- Attach the relevant documents and the reconciliation with the return.
- Check the signatory, addressee, method of sending and proof of transmission.
Do not confuse the procedures
A request for correction to the tax office, an objection to the Director of the Luxembourg Inland Revenue (ACD) and an appeal before the Tribunal administratif are subject to separate rules. A request for remission on equitable grounds follows yet another logic; it is not a second general opportunity to challenge the substance without conditions.
Litigation and representation before the courts may require a lawyer. The firm's engagement must describe the tax and documentary assistance actually provided.
Fictitious example and payment
A taxpayer disputes an income item counted twice. Their file must identify the two lines, the reference certificate and the proposed calculation, not just express disagreement with the total.
Filing an objection does not allow you to presume that payment is suspended. Collection issues and any corresponding steps must be checked separately.
The firm’s other tax engagements
Depending on your situation, the firm also handles tax, VAT and payroll, the regularisation of late tax filings and assistance during a tax audit. Fees are listed in the firm’s fee grid.
Official sources and scope
The rules apply to the year and profile concerned. Examples flagged as fictitious explain a method; they are not an individual validation. The documents and options of your file are covered by a separate engagement.