2025 tax return: get ahead on taxx.lu

Your 2025 Luxembourg tax return is already available on taxx.lu. Start before everyone else and get your refund faster.

Good news: you can already start your 2025 tax return on taxx.lu. No need to wait until April to get going.

Quick reminder: the official forms from the Administration des contributions directes (ACD) won't be available until 7 April 2026. But on taxx.lu, everything's ready to go. You can fill in your tax return online today, and the official form download will also be available from that date.

In other words: you prepare everything now, and submit as soon as it's possible. Zero stress.

Why start now?

Let's be honest: doing your tax return is rarely anyone's idea of a fun Sunday afternoon. But the longer you wait, the more painful it gets. And the earlier you start, the more you benefit.

Get your refund faster. The first returns submitted are the first ones processed by the ACD. Makes sense, right? File in April and you'll be at the front of the queue. Wait until September... and you'll be waiting for your refund a lot longer too.

Get support from our team without the rush. At the start of tax season, our team is available and responsive. As the year goes on, requests pile up. Starting now means a smooth, stress-free experience.

Optimise your next tax return. By filling in your return now, you get your Opti Score on taxx.lu: a personalised indicator that shows you where you can still optimise. The result? You have time to adjust your insurance policies, take out a private pension plan or adapt your deductible expenses before the end of the year. It's the best way to prepare for 2026 while wrapping up 2025.

What you need to get started

You don't need all your documents to hand to get going. You can start your tax return on taxx.lu, pause it and come back later: everything stays saved. You can even create multiple returns and run as many simulations as you like, completely free. It's only at the very last step, to download the official form, that you need to pay. In the meantime, you can see your tax result in real time: how much you'll get back (or need to pay), without spending a penny.

Here's what you'll find useful as you go through the return:

• Your salary certificate (annual withholding tax statement from your employer)
• Your insurance certificates (private pension, motor vehicle liability, personal liability, etc.)
• Your proof of deductible expenses: mortgage interest or personal loan interest (e.g. student loan), donations, etc.
• Your proof of tax allowances: childcare costs, domestic help costs, income-related expenses, etc.
• Your proof of extraordinary charges: medical expenses, dental costs, divorce costs, etc.
• For cross-border workers: your foreign income and bank interest statements

Haven't filed your 2024 return yet?

This is a separate matter, and it's important.

If you were required to file for 2024 (couple where both partners work, income above 100,000€, multiple income sources, rental income...), it's not too late. But every day counts.

Even if the deadline has passed, filing now is always better than doing nothing. The ACD is generally more lenient with taxpayers who come forward on their own than those who wait for a reminder.

How to get started on taxx.lu

The process is simple:

1. Create your account on taxx.lu (free, no LuxTrust)
2. Import or scan your documents with AutoScan, or add them manually
3. Follow the process: the platform guides you step by step
4. Check your result in real time: see straight away how much tax you'll get back (or need to pay)
5. Download and submit your return as soon as the official forms are available (expected 7 April 2026)

And if you want extra peace of mind, our Plus and Premium packages include a full review by a tax expert who makes sure all your deductions are properly filled in and nothing's been missed. You also get a review of your tax assessment notice and, if needed, an appeal letter (because yes, the tax office can make mistakes too).