Constitución de sociedades en España: SL vs SA en 2025

When considering the incorporation of a company in Spain, one of the first questions to be resolved is which corporate form best suits the project.

Although the SL (Sociedad Limitada) and the SA (Sociedad Anónima) are both well-known corporate structures, they do not follow the same logic nor offer the same degree of flexibility from a financial, organisational, or corporate governance standpoint.

The choice should not be made by default or on the basis of a simple comparison of minimum capital requirements. What matters is analysing how the company will be financed, what type of shareholders will be involved, what level of control is to be maintained over the admission of third parties, and what the business's growth prospects are.

Below, we examine the main differences between the SL and the SA in 2025, along with the criteria that should be considered before making a decision.

What really distinguishes an SL from an SA

The difference between a Sociedad Limitada and a Sociedad Anónima is not simply a matter of size or corporate image. Both are capital companies, but they are designed for different business realities.

The SL tends to be better suited to projects with a small number of shareholders, more closed structures, and a clear intention to control the transfer of shareholdings. The SA, on the other hand, is better adapted to larger-scale transactions, the admission of investors, or more sophisticated financing needs.

The way capital is structured also differs. In the SL, capital is divided into participaciones (membership interests), the transfer of which is more restricted. In the SA, capital is divided into acciones (shares), which as a general rule are freely transferable. This distinction has a significant bearing on the circulation of capital and the degree to which the company is open to third parties.

Share capital, participaciones, and acciones

One of the most visible points of comparison between the SL and the SA is the minimum capital required. For the Sociedad Limitada, following the reform introduced by the Ley Crea y Crece, the minimum capital may be as low as €1. However, where the €3,000 threshold is not met, certain safeguards apply — including the obligation to allocate 20% of profits to a legal reserve until that amount is reached, and specific liability rules in the event of liquidation.

For the Sociedad Anónima, the minimum capital remains €60,000. That capital must be fully subscribed and at least 25% of the nominal value of each share paid up at the time of incorporation.

The distinction between participaciones and acciones is also significant. The participaciones of an SL cannot be represented by negotiable instruments and their transfer is more restricted. The shares of an SA are, as a general rule, freely transferable, although the articles of association may introduce certain limitations. This difference has a clear bearing on the admission of new shareholders and the ability to attract investment.

Governing bodies and degree of formalism

From an organisational standpoint, both the SL and the SA have a general meeting and a management body, but they do not operate in exactly the same way.

The SL offers greater flexibility in structuring the management body: it may have a sole director, joint and several directors, jointly authorised directors, or a board of directors. This makes it easier to tailor the structure to less complex companies or those with a small group of shareholders.

In the SA, while there is also room for statutory flexibility, governance tends to be more formalised — particularly in larger projects or those that anticipate the professionalisation of corporate governance. In practice, the board of directors plays a more prominent role, and the SA tends to carry greater internal organisational requirements.

The transfer regime also differs. In the SL, the transfer of participaciones is restricted both by law and by the articles of association, and is typically subject to pre-emption rights. In the SA, shares are by default more freely transferable. This distinction can be decisive depending on whether the aim is to preserve a closed circle of shareholders or to facilitate access by investors and third parties.

Practical impact

In practice, choosing between an SL and an SA has implications that extend well beyond the moment of incorporation. It affects the entry and exit of shareholders, the ability to raise investment, the type of financing available, and the degree of control the founding core can maintain over the company.

In the SL, the restricted transfer of participaciones is often an advantage when the aim is to preserve shareholder stability or maintain a controlled corporate structure. However, that same restriction may complicate investor entry transactions or the rapid reorganisation of capital.

In the SA, the greater freedom of transfer and the nature of shares allow for a more open structure — which is useful in growth-oriented projects, investment rounds, or future corporate transactions. That openness, however, also demands greater corporate order and a more robust structure.

Ultimately, the decision should not be driven solely by initial cost, but by the practical utility each corporate form will offer as the project evolves.

What to review and address

Before opting for an SL or an SA, it is advisable to structure the analysis and review certain elements that tend to make a material difference in practice.

Analyse the planned financing

If the project will be financed with limited resources and a closed structure, the SL is generally the better fit. If significant external investment is anticipated, the SA may offer more scope.

Define the type of shareholders and their stability

A company between a small number of stable shareholders is very different from a structure designed to facilitate future entries or exits. The transferability of capital is a decisive factor.

Assess the level of formalism that can be sustained

The SA requires more capital, greater corporate order, and in many cases higher ongoing costs. It is worth considering whether the project genuinely needs that level of complexity from the outset.

Consider the possibility of subsequent conversion

The initial choice is not always final. If the project's needs change, it is possible to convert an SL into an SA, or an SA into an SL, provided the applicable legal and registration requirements are met.

Incorporation process, timelines, and indicative costs

From a procedural standpoint, the incorporation of both an SL and an SA follows a common framework: negative certification of the company name, opening of a bank account for the capital contribution, execution of a public deed, settlement of the applicable tax — although incorporation is generally exempt — registration with the Mercantile Registry, and census registration.

However, the practical complexity and cost are not identical. As a general indication, a standard incorporation may take between two and three weeks, while certain SLs using model articles may be processed more quickly through the CIRCE system, with approximate timelines of 48 to 72 hours.

There are also cost differences. As a rough guide, for an SL, notary, registry, and administrative fees may range from €450 to €1,100, excluding share capital. For an SA, those same costs may fall in the approximate range of €750 to €1,500, also excluding the required capital. These figures may vary depending on the complexity of the case, but should be factored in from the outset.

Conclusion

Incorporating a company in Spain requires careful consideration of whether an SL or an SA is the more appropriate choice. The difference lies not only in the minimum capital, but in how capital is structured, how shareholders are admitted, the degree of formalism involved, and the growth capacity intended for the project.

For the majority of small and medium-sized business ventures, the SL will continue to be the most practical and flexible option. However, where the project requires greater financing capacity, openness to investors, or a broader corporate structure, the SA may be the more suitable choice.