What is a subsidiary company, and is it a good choice for expanding your business in Europe? This article will help you explore your options.
As Head of Business Development at e-Residency, I regularly speak with founders from outside the European Union, especially from the United Kingdom, who want to establish a presence in the EU. One question comes up again and again: should an Estonian company be set up as a subsidiary company of an existing business, or as a separate company for EU activities?
Estonia is often an attractive option for international entrepreneurs thanks to its digital-first business environment, transparent rules and online company management. But while setting up an Estonian company is straightforward, choosing the right structure from the start can make a real difference later on.
There’s no single right answer. The best option depends on your business model, growth plans and – in some cases – regulatory requirements. Below, we outline the key questions to ask yourself and the practical differences to be aware of before deciding.
Before looking at legal structures, it helps to clarify why you need an EU company. Ask yourself:
If the Estonian entity is meant to support or mirror your existing business – for example by handling EU customers or contracts – a subsidiary structure may feel natural. If you’re launching a distinct EU-focused operation with its own strategy, risk profile or investors, a separate company may be a better fit.
In Estonia, both subsidiary companies and separate companies are usually established as private limited companies (OÜ). The difference lies in ownership.
While the legal form is the same, the implications for control, flexibility and administration can differ – particularly for regulated businesses.
If you operate in a regulated industry – such as fintech, payments, insurance brokerage or other financial services – your choice of structure is especially important.
In practice, regulators often expect a clear and transparent group structure. For this reason, a subsidiary model is frequently the more practical option, particularly when:
A stand-alone company isn’t always ruled out, but it can introduce additional questions during licensing or authorisation. For regulated businesses, a subsidiary company is often the path of least resistance – even if it involves more effort at the setup stage.
Outside regulated sectors, a separate company can offer more flexibility. It may be better suited if you plan to:
A subsidiary, on the other hand, can make sense if you want tighter integration, centralised decision-making or a clearly defined EU arm within a wider group.
From a practical perspective, there are some technical differences worth considering.
Both structures can be managed remotely – but timelines and complexity may vary.
Some founders start by setting up an Estonian company digitally via e-Residency and only later decide that it should sit under a foreign head office.
In these cases, two details matter if you want the option to transfer shares without a notary:
When both conditions are met, shares can generally be transferred using a private written agreement, making it easier to move the company under a foreign parent without additional formalities.
Ultimately, the goal isn’t to choose the simplest structure today, but the one that best supports your business as it grows.
For regulated businesses, structure can directly affect licensing and supervision and make a subsidiary company a good option. For others, it’s about flexibility, risk management and future plans. Either way, Estonia’s digital infrastructure – combined with e-Residency – makes it possible to establish and manage an EU company entirely online, while choosing the structure that fits your ambitions.
This article was written by Ülane Vilumets, Head of Business Development at e-Residency.
Book a free call with Ülane to get personalised advice on opening a subsidiary in Estonia.
