Which legal forms does Galux serve?

Galux handles SARL-S (simplified), SARL, SA, SCI, sole traders (indépendants), liberal professions and individuals (resident, cross-border workers and European officials).

Is everything fully digital?

Yes. Clients upload documents through a secure online portal, sign electronically via Odoo Sign, and receive reports and tax filings remotely. No office visit is required.

In which languages does Galux operate?

Galux delivers all services in English, French and German.

How are Galux fees structured?

Galux uses transparent quotes available via the online quote form. We offer quarterly and annual flat-fee packages for small businesses and self-employed, plus tailored quotes for larger companies.

What is the annual accounts filing deadline in Luxembourg?

Luxembourg companies must file their annual accounts (balance sheet + profit and loss) at the Registre de Commerce et des Sociétés (RCS / LBR) within 7 months after the end of the fiscal year.

How often must VAT returns be filed in Luxembourg?

Most SMEs file VAT quarterly (TVA_DECT). All VAT-registered taxpayers also file an annual VAT return (TVA_DECA) by 1 May of the following year.

When is the personal income tax return due in Luxembourg?

The Modèle 100 personal income tax return is due by 31 December of the year following the tax year.

Can Galux file taxes for French, Belgian or German cross-border workers?

Yes. Galux specialises in cross-border (frontalier) tax returns for residents of France, Belgium and Germany who work in Luxembourg, including joint household taxation and bilateral treaty optimisation.

Does Galux work with European institution staff?

Yes. Galux assists officials and agents of the European Commission, European Parliament, Court of Justice, EIB, European Court of Auditors and other EU institutions with their Luxembourg and home-country tax obligations.

Galux — Accounting and tax in Luxembourg

Trusted partner of Luxembourg SMEs and self-employed professionals since 2012

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Our mission

Free up your administrative time so you can focus on growing your business. We combine deep Luxembourg tax expertise with modern digital tools to deliver reliable accounting, payroll and tax services.

14+

Years of experience

Silver

Odoo Partner since 2020

SME

& self-employed specialist

FR/EN

Multilingual service

The Galux story

Galux delivers high-level expertise in Luxembourg tax and accounting, with one clear ambition: making compliance straightforward for entrepreneurs.

Founder Gaëtan Hertz holds a Master's in Finance from the University of Lyon and started his career in one of Luxembourg's largest banks (2004–2008). He then specialised in Luxembourg taxation at the Chamber of Commerce before founding Galux in 2012.

Since then, Galux has supported numerous SMEs and self-employed professionals across all areas of accounting and tax: annual accounts, corporate income tax, personal income tax, payroll, bookkeeping and statutory filings.

In 2020, Galux became an Odoo Silver Partner, integrating one of the most flexible ERPs on the market into its service offering. Every Galux client now has free access to the Odoo Invoicing module, ready for PEPPOL e-invoicing, with the option to expand to the full Odoo suite as their business grows.