Income tax returns in Luxembourg for private individuals
Resident or cross-border worker, employee or retiree: we prepare and file your tax return, including rental income and late years if needed.
What we do for you
- Checking your situation: are you required to file, and is it worth filing?
- Preparing your tax return (form 100).
- Your rental income and capital gains on property.
- Filing on your behalf, as your authorised representative, on MyGuichet.lu.
- Tax returns for previous years not yet filed.
What you need to know in Luxembourg
Deadline: 31 December
The return for year N must be filed by 31 December of year N+1 at the latest. No extension is possible.
Source: ACD: Information for residentsThe 2026 campaign
For 2025 income, returns can be filed from 7 April to 31 December 2026.
Source: Guichet.lu: Income tax returnThe simple pre-filled return
Some taxpayers receive a simple pre-filled return. It is not always the most advantageous: we check it with you.
Source: ACD: 2025 tax returnsAn accounting firm can file for you
The taxpayer or their representative, for example an accounting firm, can file the return online on MyGuichet.lu.
Source: Guichet.lu: Filing via MyGuichet.luOur prices
Prices incl. VAT: tax returns for private individuals are shown with all taxes included.
How it works
You contact us
Request a callback, get your online quote or call us.
We call you back
An advisor calls you back the next working day, at the time slot you chose.
You receive a proposal
After a short conversation, we send you a written quote.
We take over
You send us your documents and we do the rest.
Frequently asked questions
Am I required to file a tax return?
It depends on your income and your situation. In many cases, filing is still worthwhile to claim your deductions. We check with you during the first call.
I am a cross-border worker: can you help?
Yes. We prepare the Luxembourg tax return for cross-border workers employed in Luxembourg.
How much does it cost?
From €150 incl. VAT. Add €49 incl. VAT per form 190 (rental income) or 700 (capital gain on property), and €149 incl. VAT per late year.
Which documents should I prepare?
Your salary or pension certificate, receipts for deductible expenses and, if applicable, your rental income. We send you the exact list.
Entrust your tax return to AS Comptabilité
An advisor calls you back the next working day. The call is free and without obligation.
See also: accounting · freelancers