The glossary to understand and take action

Tax advance payment

Provisional tax payment that is reconciled with the final tax assessment for the relevant period.

Notion comptable, fiscale ou juridique · Luxembourg Fiduciaries Editorial Team · Reviewed on

Understand the scope

Definition and points to distinguish

Its monitoring must identify the tax, the year, the due date and the payment. The amount requested does not necessarily constitute the final expense for the financial year. A new estimate may lead to preparing a substantiated request for amendment, without unilaterally changing the amount due.

In your file

What this changes in practice

A tax advance payment is an advance payment offset against the relevant tax. It does not necessarily constitute the final amount of the tax assessment. The company must distinguish advance payment due dates, filing of returns and payment of the balance after assessment. If its situation changes, it considers the appropriate procedure with the administration rather than unilaterally changing its payments.

A scenario to help you understand

Educational example

A company's forecast profit falls sharply. It considers the possibilities for adjusting advance payments and retains the supporting documents for its request.

Fictitious situation, presented to illustrate the concept.

Prepare for what comes next

Points to check

  • Identifier l’impôt et la période
  • Suivre avances et solde séparément
  • Documenter toute demande d’adaptation

The practical question

Find out more

Comment rapprocher les avances avec le bulletin d’imposition ?

Identifiez le même impôt et la même période, puis comparez les montants versés et imputés. Une différence peut venir d’un calcul, d’une affectation ou d’un décalage de traitement. Conservez les références des paiements et demandez une clarification si nécessaire. Le solde du bulletin ne doit pas être interprété sans examiner les avances déjà prises en compte.

Connecting concepts

Terms to know as well

Continue with the concepts, contacts and procedures related to this topic.

Direct Tax Administration (ACD)The Direct Tax Administration (ACD) is responsible for direct taxes falling within its remit.Tax returnA tax return provides the administration with the information needed to assess or verify a tax for a given person and period.Financial forecastThe financial forecast translates the project's assumptions into expected results, cash flows and financing needs.Municipal business taxMunicipal business tax (ICC) is a direct tax linked to commercial profit, the calculation of which notably takes account of a municipal rate.Corporate income tax (IRC)The term corporate tax commonly refers to the taxation of companies’ profits; in Luxembourg, IRC is one of the taxes to be distinguished.Tax return — Form 500Form 500 refers to the tax return form for entities, with the sections and appendices corresponding to the relevant year and situation.

Put it into practice

Explore further with our guides

Practical guideCorporate income tax (IRC): understanding advance payments and preparing the settlementPractical guideMunicipal business tax: understanding the tax base and the municipalityPractical guideCorporate net wealth tax: preparing the relevant data

Sources and verification

References consulted on 20 September 2026. Official procedures specify the applicable conditions and exceptions.

This guide explains a general process. The applicable rules depend on your situation; it does not constitute personalised advice. Report a correction.

A definition gives you a reference point. To examine your situation, clarify your question with a professional.