When an existing company expands into Luxembourg, the first structural fork is old but consequential: open a branch of the foreign company, or incorporate a Luxembourg subsidiary. Both are legitimate. They differ in liability, paperwork, and how the market treats you.
What each one is
A branch (succursale) is the same legal person as the parent, operating at a Luxembourg address. It registers with the RCS, appoints a branch manager, and for commercial activity needs a business permit like anyone else. But there is no separate company: contracts, debts and lawsuits belong to the parent directly.
A subsidiary is a Luxembourg company (typically a Sàrl) owned by the parent. It has its own legal personality, its own capital, its own accounts, and its own liability shield. The parent is a shareholder, not the contracting party.
Liability: the deciding factor more often than tax
The branch exposes the parent's entire balance sheet to Luxembourg liabilities, and vice versa: trouble at home follows the branch abroad. The subsidiary contains risk within its own capital, absent guarantees or fault. For any activity with meaningful contractual or operational risk, this alone usually settles the question in favour of the subsidiary.
Administration: closer than the folklore says
Branch folklore promises lighter administration. The reality is more even. The branch still registers, still needs the permit for commercial activity, still keeps accounting for its Luxembourg operations, and additionally files certain parent-company documents with the register, which drags the parent's paperwork into Luxembourg publicity. The subsidiary files its own accounts like any local company and keeps the parent's documents out of it.
Where the branch genuinely is lighter: no notary, no share capital to fund, no separate corporate life to maintain. For a low-risk representative presence, that lightness is real.
The practical frictions nobody advertises
Banking. Luxembourg banks tend to find subsidiaries easier to onboard than branches of foreign entities, because the compliance file is self-contained. The branch imports the parent's entire KYC surface.
Counterparties. Enterprise clients, landlords and partners in Luxembourg sign more comfortably with a Luxembourg company than with the local arm of a foreign one, for the mundane reason that recourse is simpler.
Funding. National aid instruments look for Luxembourg substance. A subsidiary with real activity fits the funding landscape naturally; a thin branch mostly does not.
Permits. Both need the permit holder logic to work: a real dirigeant with a real link to the Luxembourg operation. Remote-controlled establishments run into the same effective management questions either way.
A reasonable way to choose
Pick a branch when you need a light, low-risk presence tightly integrated with the parent (a sales office, a representative function) and you accept the liability unity.
Pick a subsidiary when there is real business risk, local hiring, funding ambitions, or a long-term Luxembourg strategy. In our work the subsidiary is the majority outcome for exactly these reasons, and converting a branch into a subsidiary later is possible but messier than starting right.
We set up both, including the permit and banking tracks that follow. Talk through your expansion case before the fork, not after; it is a fifteen-minute conversation with year-long consequences.