Tax statute of limitations in Luxembourg: 5 and 10 years

What is the tax statute of limitations in Luxembourg?

The tax statute of limitations in Luxembourg is five years: the Treasury's claim lapses five years from 31 December of the year for which the amount to be collected is due, and that overall period can never be shorter than ten years where an additional assessment follows an incomplete or inaccurate return.

The five-year period is not confined to corporate income tax. The law of 27 November 1933 on the collection of direct contributions applies it to all taxes, duties, contributions, excise duties, fines, fees and other charges generally within the administration's remit, so municipal business tax, net wealth tax and withholding taxes sit in the same frame as income tax.

That ten-year figure needs a precision most summaries skip. Ten years is not a second, free-standing period replacing the first: it is a floor. The law of 22 December 1951 sets out the interruption rule, then adds that the overall limitation period cannot be shorter than ten years in the case of an additional assessment for an incomplete or inaccurate return. The administration therefore does not have to show fraudulent intent to have ten years: the text reads with or without fraudulent intent.

The consequence is the one that matters to a director. A return filed on time but incomplete on one line exposes that year for ten years, not five. Record retention, set independently, also runs to ten years. The two horizons meet, and that is no drafting accident.

When does the Luxembourg tax limitation period start to run?

The tax limitation period in Luxembourg starts on a 31 December, but not the same one: that of the year for which the amount is due for direct taxes, that of the year in which it became due for VAT.

The gap between those two anchors is not a drafting nuance, it moves whole months. For direct taxes the starting point attaches to the tax year itself, that is, to the financial year whose result is taxed. For VAT it attaches to the moment the tax becomes payable by the taxable person, which can fall in a calendar year later than the chargeable event depending on return frequency.

Two practical cases show the effect. For a year ended 31 December 2026, the direct-tax period runs from 31 December 2026 whether the assessment notice was issued in 2027 or in 2029: the date of the notice is not the starting point. For tax that became payable in January 2027 on December 2026 transactions, the VAT period runs from 31 December 2027.

A director who counts five years from the assessment notice is therefore several years out, in one direction or the other. The useful rule fits in a sentence: limitation runs from the end of a calendar year, never from a letter received. That is also why the filing calendar of the corporate tax return and the limitation calendar do not overlap.

How is the Luxembourg tax limitation period interrupted?

The tax limitation period in Luxembourg is interrupted either in the manner and under the conditions laid down by articles 2244 and following of the Civil Code, or by the taxpayer waiving the time already elapsed, under the law of 22 December 1951.

The effect of interruption is precise: a new limitation period, open to interruption in the same way, starts to run and is completed at the end of the fourth year following that of the last act interrupting the previous period. It is therefore not a fresh five-year period but one expiring at the end of the fourth following year, and the ten-year floor keeps applying where an additional assessment follows an incomplete or inaccurate return.

The waiver deserves a stop, because it is the only cause of interruption that comes from the taxpayer. Guichet.lu defines it as the act by which the taxpayer declares that they waive the limitation of their tax debt with the Direct Tax Administration. It typically appears in a payment-plan negotiation, when the collection office agrees to instalments. Signed without being explained, it resets a clock the taxpayer believed close to its end.

A neighbouring mechanism lengthens the period with no act by the taxpayer. Before the five-year period expires the administration may apply to register its legal mortgage, and that registration preserves the Treasury's claim for three further years, with the privilege attached by the law of 28 May 1921. Five years can therefore become eight with no additional assessment and no criticism of any return.

We regularly see files where the waiver was signed at the counter, without advice, because it was presented as a formality accompanying the payment plan. It is not abusive: it is the normal counterpart of instalments. But it should be signed knowing which period it reopens, and that is precisely what nobody had worked out in the files we take over.

Does VAT follow the same limitation rules?

VAT follows the same architecture as direct taxes in Luxembourg: the Treasury's action for payment of tax and fines lapses five years from 31 December of the year the amount became due, under article 81 of the VAT law.

Article 81 of the amended law of 12 February 1979 drafts the causes of interruption in the same terms: articles 2244 and following of the Civil Code, or waiver. Where interruption occurs, a new period open to interruption in the same way starts to run and is completed at the end of the fourth year following that of the last interrupting act, and the overall period cannot be shorter than ten years where an additional assessment follows an incomplete or inaccurate return.

The same article handles the symmetry that files forget more often than the administration's own period: any right to a refund of tax or of a fine lapses five years from 31 December of the calendar year to which the tax to be refunded relates, or during which the fine was incurred. VAT paid in error cannot be recovered indefinitely, and a mistake found after that date stays with the business.

That point has to be read against filing rhythm. A business on the annual regime often finds a rate or reverse-charge error more than twelve months after the transaction, and that lag eats part of the refund period: the choice of VAT return frequency is not only a question of administrative load.

How long must accounting records be kept in Luxembourg?

Accounting records must be kept ten years in Luxembourg: journal, general ledger and inventory data and supporting documents, for ten years from the close of the financial year to which they relate, and the VAT law sets the same duration.

Two sets of rules overlap without contradicting each other. Article 16 of the Code of Commerce carries the ten-year retention obligation for accounting records and imposes on traders a general obligation to keep company documents for ten years from the close of the financial year to which they relate. Guichet.lu adds two execution points: documents may be kept electronically or on paper, and the data must be accessible in the Grand Duchy of Luxembourg, at the registered office or principal place of business of the undertaking subject to accounting obligations.

Article 65 of the VAT law sets the same horizon with a starting point specific to each document type. Books and documents whose keeping, drawing up or issuing is prescribed by the VAT law must be stored for ten years from their closing, for books, or from their date, for other documents. For invoices, the taxable person must ensure that copies of invoices issued by themselves or, in their name and on their behalf, by their customer or by a third party, as well as all invoices received, are stored for ten years from their date of issue.

Three formal conditions come with VAT storage, and they are the ones that cause trouble in practice. The authenticity of the origin and the integrity of the content must be assured throughout the storage period. Electronic storage is valid provided the data guaranteeing that authenticity and integrity are stored as well. And the taxable person may determine the place of storage, provided they make all the books and documents so stored available to the administration, without undue delay, on any request. A software migration that leaves older years in an unreadable format fails that last condition, a question close to that of the FAIA computerised audit file.

Two different durations live beside those ten years. For anti-money-laundering purposes, professionals keep documents, data and information for five years after the end of the business relationship with the client or after the date of an occasional transaction, and the supervisory authority may require retention for a further period not exceeding five years. And on liquidation, the publication states the place where the company's books and documents will be deposited for five years, which does not displace retention obligations arising before dissolution.

Limitation, objection and appeal: three periods not to be confused

The tax statute of limitations in Luxembourg is not the appeal calendar: an objection against an assessment notice must be filed within three months from the day it is notified, whereas limitation bounds the Treasury's right to assess and collect over several years.

The sequence is short and each step has its own clock. The objection is filed with the director of the Direct Tax Administration within three months of notification of the assessment notice or decision. The director then has six months to answer. If the taxpayer receives a decision they are not satisfied with, they have three months to bring an action for reversal before the Administrative Tribunal. And if no answer is given within six months, the absence of an answer amounts to a presumption of refusal, which opens the route to the Administrative Tribunal.

The costliest confusion runs one way only. An expired objection period cannot be recovered on the ground that limitation is still running: the assessment notice has become final, and limitation reopens no challenge. The reverse does not hold either: having objected in time does not, by itself, interrupt the effects attached to limitation of the claim.

A third period, finally, has nothing to do with the first two: the filing deadline. Late filing carries its own surcharges, as with the filing of annual accounts, and a return never filed does not put the year beyond reach. Limitation protects a regularised position, not one left undeclared.

What limitation changes in a Luxembourg file

The tax statute of limitations changes three concrete things in a Luxembourg file: the date from which archives may be destroyed, the real reach of a voluntary correction, and the weight of a signature on a waiver.

On archives, the mistake we meet most often is a purge set at five years, by analogy with the ordinary limitation period. It is wrong twice over: retention is set at ten years by a separate text, and the tax period itself reaches ten years as soon as a return is held to be incomplete or inaccurate. A five-year purge therefore destroys the records exactly when they become most useful, since an additional assessment is argued with the documents in hand.

On correction, the reasoning has to be done year by year rather than in one block. An error found across three years is not handled in a single move: time-barred years and open years do not share a regime, and the starting point is recomputed for each from its own 31 December. A dated schedule, year by year, is the minimum: we draw one up systematically when taking over a file, alongside the annual accounts and the documents supporting them.

On the waiver, the field observation is stable: it is signed because it comes with a payment facility the business wants, not because it was weighed. The right reflex is not to refuse it, it is to know what it moves before signing.

Rebuilding a history whose records were destroyed costs far more than keeping them: the work then runs on bank statements, suppliers' copy invoices and ledger extracts from a former software package, item by item. Our terms of engagement are set out on the pricing page; retention, by contrast, costs almost nothing.

Sources and verification

Written for Financial Services Luxembourg and reviewed before publication by Mickaël LOC, licensed accountant (authorisation 10077274). Sources were verified on 2 October 2026, the date on which every period, starting point and legal reference cited here was cross-checked against an official source.

The sources consulted are the following.

The law of 27 November 1933 on the collection of direct contributions, excise duties on spirits and social insurance contributions, published in the Official Journal of the Grand Duchy of Luxembourg, for the five-year limitation of the Treasury's claim, for its scope (all taxes, duties, contributions, excise duties, fines, fees and other charges generally within the administration's remit), for the starting point at 31 December of the year for which the amount to be collected is due, and for the registration of the legal mortgage preserving the claim for three further years with the privilege attached by the law of 28 May 1921.

The law of 22 December 1951 extending the limitation period of certain direct taxes and setting out the conditions under which tax limitation periods may be interrupted, for interruption under articles 2244 and following of the Civil Code or by the taxpayer's waiver of the time already elapsed, for the new period completed at the end of the fourth year following that of the last interrupting act, and for the ten-year floor in the case of an additional assessment for an incomplete or inaccurate return, with or without fraudulent intent.

The amended law of 12 February 1979 on value added tax, in the coordinated text published by the Indirect Tax Portal, for article 81 (five-year limitation of the Treasury's action for payment of tax and fines from 31 December of the year the amount became due, interruption, and five-year limitation of the right to a refund) and for article 65 (ten-year storage, starting at closing for books and at their date for other documents, ten years from the date of issue for invoices, authenticity of origin and integrity of content, electronic storage, and free choice of place subject to making documents available without undue delay).

Article 16 of the Code of Commerce, for the ten-year retention of accounting records and company documents from the close of the financial year. The guichet.lu page on accounting obligations of undertakings, for accessibility in the Grand Duchy of Luxembourg at the registered office or principal place of business, for the ten-year retention of journal, general ledger, inventory and supporting documents from closing, and for the acceptance of both electronic and paper formats.

The guichet.lu page on dealing with enforced collection of outstanding tax, for the definition of the waiver of limitation and for the statement that tax debt generally lapses in five years, and in certain cases in ten. The guichet.lu page on contesting a decision of the Direct Tax Administration and the A to Z page on time limits for the various forms of appeal of the Direct Tax Administration, for the three-month objection period from notification, for the six months available to the director, for the three-month action for reversal before the Administrative Tribunal and for the presumption of refusal attached to silence.

The amended law of 12 November 2004 on the fight against money laundering and terrorist financing, for retention for five years after the end of the business relationship or after the date of an occasional transaction and for the further period not exceeding five years that the supervisory authority may require.

Three points could not be verified in their primary source and are therefore not asserted here. The full text of the laws and pages cited: legilux.public.lu, impotsdirects.public.lu, guichet.public.lu and pfi.public.lu are blocked by the network proxy of our editorial environment, and these documents were read through indexed extracts via a search restricted to official domains; the citations above reproduce those extracts without extrapolation. The exact wording of the paragraphs of the general tax law of 22 May 1931 governing revision of an assessment notice and the objection: we therefore cite no paragraph number, and the appeal periods are given from the official pages that publish them.

And the interaction between the tax limitation period and the periods applying in criminal tax matters, which fall under other texts and are not covered here. These points can be checked in the coordinated text of the general tax law and of the VAT law on impotsdirects.public.lu and pfi.public.lu, and with the competent tax office or collection office for a given year.

This article sets out the law as it stands at the date of publication and is not personalised advice: the date on which a limitation period is acquired depends on the year concerned, on the content of the return filed and on the acts that occurred in between. Report an error to contact@financialservices.lu: the correction is dated in the article.