ASBL vs. AISBL: What is the Real Difference?

In Belgium, nonprofits can be registered under two distinct legal forms:

• ASBL (Association sans but lucratif) – Nonprofit Association
• AISBL (Association internationale sans but lucratif) – International Nonprofit Association

The differences between these two legal structures often cause confusion. Before registering a nonprofit in Belgium, it is vital to understand the real legal and practical differences between ASBLs and AISBLs and dispel a few common myths.

CLEARING UP A COMMON MISUNDERSTANDING

A common misconception is that only AISBLs can have members or activities outside Belgium. This is not the case. ASBLs are allowed to operate internationally and can include members from other countries.

In fact, many nonprofits with international operations have chosen the ASBL structure and operate successfully for decades. For an example, click here.

Key Differences Between ASBL and AISBL

What are the main differences between these two legal forms? These can be summarised in three key areas:

Legal definitions

Here’s how Belgian law defines these two legal entities:

• ASBL: An association with legal personality, where members are not personally liable for the organisation’s commitments.
• AISBL: An association with legal personality recognised by the King of the Belgians, designed to serve a purpose of international utility, where members are not personally liable for the organisation’s commitments.

Thus, the key difference lies in the royal recognition conferred by the Royal Decree. When applying, an AISBL must demonstrate a purpose beyond Belgian borders.

Conclusion: When the recognition granted by the Royal Decree is not necessary, an ASBL structure may be sufficient.

Registration Process

Here is how each is registered:

• An ASBL is registered at the Tribunal d’Entreprise. The constitutive documents can be signed privately, so no notary is required. Once filed, the organisation immediately gains legal personality.
• An AISBL registration involves two steps. First, the constitutive documents must be notarised and filed at the Tribunal d’Entreprise. Then, an application is submitted for the Royal Decree. Legal personality is granted only when the Royal Decree is issued.

Conclusion: registering an AISBL involves more steps, takes longer, and incurs higher costs.

Governance Structure

The third major difference lies in how governance of these organisations can be set up:

• ASBLs must follow a governance structure prescribed by Belgian law. The General Assembly, composed of the organisation’s members, holds the highest authority, with several key competences reserved for it. For instance, it elects the Board of Directors and retains the power to revoke mandates.

  Some other competences of the General Assembly, as prescribed by law, include approving annual accounts, excluding members, making statutory changes, converting an ASBL into another legal form, or liquidating the organisation. The rights and obligations of members are also predefined by law.

• An AISBLs, on the other hand, have more flexibility. Founders can design their own governance structures, deciding how the Board of Directors is appointed, how powers are allocated, and more.

That said, many AISBLs still adopt governance models identical to ASBLs since the framework is logical, transparent, and works well for most organisations.

Conclusion: If the project requires a custom governance structure, opt for an AISBL.

WHY DO SOME ORGANISATIONS CHOOSE AISBL?

Despite the additional complexity, and even when a custom governance structure is not necessary, for some projects AISBL status is the right choice. Common reasons include:

• Formal status: Royal recognition formally confirms the organisation’s international purpose. In some contexts, this may be relevant for positioning, even though both ASBLs and AISBLs build credibility first and foremost on the actual scope and impact of their activities.
• Stakeholder requirements: In some cases, funders or partners—especially those outside Belgium—may expect or require officially recognised international status.

For example, an international peacebuilding organisation originally based in the United States decided to register its Belgian counterpart as an AISBL. This decision was not driven by legal or governance concerns, but rather by the desire to meet the expectations of U.S. funders.

Conclusion: Obtain clarity on the usefulness of the royal recognition for your project.

START SIMPLE: CONVERTING ASBL TO AISBL IS POSSIBLE

For most startup nonprofits, beginning with an ASBL is the practical and cost-effective choice. It supports a wide range of activities, including international operations.

If it turns out necessary, an existing ASBL can be converted into an AISBL, and royal recognition can be obtained at that point. This flexibility allows nonprofits to grow and adapt as their needs evolve.

Summary

Before committing to the more complex, lengthy, and costly AISBL registration process, take a moment to evaluate: Is it truly necessary?

The key differences between an ASBL and AISBL are:

1. Legal definitions: An AISBL is a legal form for a nonprofit organisation with an international purpose, whereas the definition of an ASBL does not specify the geographical scope of its operations.

   In practice, this means that AISBLs are granted royal recognition for their international purpose, whereas ASBLs can have activities and members outside of Belgium, but without the formal confirmation of their international character through the King’s signature.

2. Registration process: Registering an AISBL involves a two-step process that takes longer and incurs higher costs compared to an ASBL.
3. Governance structure: AISBLs offer more flexibility in designing an organisation’s internal governance, while ASBLs must adhere to the structure prescribed by Belgian law.

Valid reasons to establish an AISBL include:

• The need for a governance structure different from the one prescribed by Belgian law for ASBLs.
• The need for formal royal recognition of the organisation’s international purpose.

If neither of these applies, an ASBL is likely to provide a legal structure most founders need. Many organisations can operate effectively and internationally as ASBLs. Registering an AISBL based on misconceptions can lead to wasting valuable time and resources.

It is worth noting that some service providers may register an AISBL upon request, as it is often more profitable for them, even when an ASBL structure might serve your needs just as well.

By making an informed decision, you can ensure your nonprofit starts off on the right path—avoiding unnecessary complexity and costs.

Learn more

If you would like more details on the requirements and the process of setting up an ASBL in Belgium, read our brief guide ‘How to set up a non-profit organisation in Belgium’.

Also, learn about the support we offer with the registration of ASBLs.