Luxembourg corporate tax, explained without the myths

A company seated in Luxembourg City pays a combined 23.87% on trading profits above €200,000, and roughly two points less on the first €175,000, where corporate income tax drops to 14%. That headline number is three separate taxes added together, and the third one changes with your commune. Below is the full stack, the rates in force for tax year 2025 onwards, and the dates the money is actually due.

Rates in this guide were verified against the Administration des contributions directes and the Loi du 20 décembre 2024 in July 2026. That law cut corporate income tax to 16% and restructured the reduced band, so any source still printing 17% is describing tax year 2024.

Three layers, one bill

What people casually call "corporate tax" in Luxembourg is a stack of three:

The surcharge is charged on the tax, not on the profit: the 16% corporate income tax carries a further 7% of itself for the employment fund. Municipal business tax then sits on top, and it is the layer that varies. Luxembourg City applies a coefficient of 225% to the 3% base rate, which produces 6.75%. Stack the three and you reach the 23.87% combined rate for a company seated in the capital.

Two identical companies in different communes therefore pay different totals, which is why "the Luxembourg rate" is always shorthand. Coefficients run generally between 200% and 400%, so the municipal layer alone can differ by several points between two communes a short drive apart. Below the €175,000 ceiling the same three-layer arithmetic runs on the 14% band instead, which lowers the corporate layer without changing the structure.

Net wealth tax: the one founders forget

Luxembourg also levies an annual net wealth tax: 0.5% on taxable wealth up to €500M, 0.05% above. More relevant for a young company is the minimum charge, which applies even in a loss-making year and is set by the size of the balance sheet:

For most operating startups this is €535 a year, which is small but permanent: it recurs whether or not you made a profit, and it belongs in the compliance budget from year one. Holding-heavy balance sheets should treat it as a design input rather than a surprise, because the tier boundaries are drawn on total assets, not on income.

When the money is actually due

The corporate income tax and municipal business tax returns are both due by 31 December of the year following the tax year — the deadline that has applied since tax year 2022. So the 2026 return is due 31 December 2027.

You do not wait until then to pay. The tax office sets quarterly advances based on your last assessment, and the municipal business tax advances fall on 10 February, 10 May, 10 August and 10 November.

A first-year company usually has advances of zero, then receives a catch-up assessment once the first return is processed — which is the most common cash-flow shock for founders in year two, and the reason to keep the first profitable year's tax provisioned rather than spent.

What actually reduces the bill, legitimately

The differences between companies paying more and less tax on the same profits are usually boring:

• Deducting what is deductible. Proper bookkeeping captures real business expenses; shoebox accounting forfeits them. The cheapest tax planning is complete records.
• Loss carry-forward. Losses offset future profits for the 17 most recent closed financial years, oldest first, and Luxembourg has no carry-back. For a startup that invests two years before it earns, this is the largest single lever on the eventual bill.
• The IP Box for companies earning from self-developed software or patents, exempting a large share of qualifying IP income. We wrote a full guide on it.
• Investment tax credits when you invest in qualifying assets, taken through the return.

None of this is aggressive. It is the system working as designed, and it is available to a two-person Sàrl exactly as to a group.

Getting profits out: the dividend layer

Corporate tax is not the last stop. Dividends paid out of a Luxembourg company carry a 15% withholding tax. The exemption most founders eventually meet is the parent-subsidiary regime: distributions are exempt where the parent holds at least 10% of the shares, or meets alternative criteria including a minimum €1,200,000 investment, under conditions.

An individual shareholder taking dividends personally does not get that exemption, which is why the salary-versus-dividend split is an arithmetic question rather than a preference.

The myths, briefly

"Luxembourg companies barely pay tax." Operating companies pay the full stack above — 23.87% in the capital, plus net wealth tax, plus withholding on distributions. The famous structures of investigative journalism involved cross-border arrangements of a different era and scale, most of which the last decade of EU rules dismantled.

"The rate is all that matters." An effective rate a few points lower helps; a funding programme covering a chunk of your project costs helps more. Founders comparing countries on headline rates routinely ignore that Luxembourg pays companies to build things, which flows straight to the same bottom line.

"My commune barely matters." It is the one number you partly choose. The municipal layer is roughly a quarter of the total bill, and coefficients differ across the country, so where the company actually operates is a real input — though it has to be a true operating story, not an address of convenience.

Common questions

The questions below are the ones founders ask once the rates stop being abstract, usually in the weeks before the first return is due.

What is the corporate tax rate in Luxembourg in 2026?

Corporate income tax is 16%, reduced to 14% on taxable income up to €175,000. Adding the 7% employment-fund surcharge and Luxembourg City's 6.75% municipal business tax gives a combined 23.87% at the standard rate.

Does every Luxembourg company pay the same rate?

No. The national layers are identical everywhere, but municipal business tax is set by each commune's coefficient applied to the 3% base rate, so the combined total depends on where the company operates.

Does a loss-making company pay anything?

Yes — the minimum net wealth tax still applies, starting at €535 a year for a balance sheet up to €350,000. Losses themselves carry forward for the 17 most recent closed financial years.

When is the corporate tax return due?

By 31 December of the year following the tax year, with quarterly advances due in the meantime.

What to do with this

At formation, tax structure is mostly about not making mistakes: pick a sensible commune-of-operations story, set up books properly, and flag early whether IP or heavy investment is coming. The optimisation conversations belong at the first profitable year and before any exit. Our accounting team runs both the filings and those conversations, with the current numbers plugged in.

See what monthly accounting includes, from €250