how a subsidiary company helps non-eu firms expand

What is a subsidiary company, and is it a good choice for expanding your business in Europe? In this article, Ülane Vilumets, Head of Business Development at e-⁠Residency, helps 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.

Start with the why

Before looking at legal structures, it helps to clarify why you need an EU company. Ask yourself:

• Are you entering the EU market for the first time, or expanding existing operations?
  Will the Estonian company act as an extension of your current business, or operate independently?
• Is this a long-term strategic move, or an initial market test?

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.

What is a subsidiary company vs a separate company? 

In Estonia, both subsidiary companies and separate companies are usually established as private limited companies (OÜ). The difference lies in ownership.

• A subsidiary company is owned by another company, typically your existing non-EU business.
• A separate (or “sister”) company is owned directly by the same individual shareholders, rather than by the parent company.

While the legal form is the same, the implications for control, flexibility and administration can differ – particularly for regulated businesses.

Subsidiary company for licenced or 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:

• The parent company already operates in a regulated environment
• The Estonian entity will rely on group-level governance, capital or compliance frameworks
• Supervisory authorities need clear oversight of ownership and control

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.

Separate company for control, flexibility and future plans

Outside regulated sectors, a separate company can offer more flexibility. It may be better suited if you plan to:

• Bring in EU-specific investors later
• Sell or wind down EU operations independently
• Test a new market without fully integrating it into your existing business

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.

Administrative setup: digital vs notarised steps

From a practical perspective, there are some technical differences worth considering.

• Separate companies are often easier to establish digitally using e-Residency, either as a DIY process or with a service provider.
• Subsidiary companies can require additional steps from the outset, such as notarised documents and foreign company extracts, depending on the parent company and jurisdiction.

Both structures can be managed remotely – but timelines and complexity may vary.

Practical note: planning for future restructuring

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:

• the company’s share capital is €10,000 or more and fully paid in, and
• the articles of association do not require notarisation for share transfers.

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.

Choosing a structure that supports growth

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.