In Spain, the Limited Liability Company (Sociedad de Responsabilidad Limitada, S.L.) is the most popular corporate structure for entrepreneurs. Its main advantages are the complete separation of company assets from shareholders’ personal assets, effectively mitigating business risks, and a minimum share capital requirement of just €1, making the process relatively simple and fast.
This article will detail the six key steps required to establish a Limited Liability Company in Spain, helping you fully understand the entire registration process.
1. Company Name Approval
The first step in forming a company is choosing a unique name. To do this, you must apply to the Spanish Central Mercantile Registry (Registro Mercantil Central) for a “Certificate of Name Uniqueness” (Certificación negativa del registro mercantil central). This ensures the chosen name is not already registered by another company.
When applying, it is advisable to submit five alternative names in order of preference. The Registry will review them sequentially until an available name is found. This certificate is valid for three months, and the company must be notarized within this period. The fee for this procedure is approximately €20.
2. Signing the Public Deed of Incorporation
After obtaining name approval, all company shareholders must go to a Public Notary (Notaría) to sign the Public Deed of Incorporation (Escritura Pública de Constitución). When signing, the following documents must be presented to the notary:
- Articles of Association (Estatutos Sociales): This is the fundamental document governing the company’s operations. If there are no special requirements, you can use the standard template provided by the notary’s office.
- Certificate of Name Uniqueness: The document obtained in the previous step.
- Identification of all shareholders and the company director: A valid Spanish residency card or passport is required.
- Proof of Capital Contribution: According to current law, the minimum share capital is €1, although a contribution of €3,000 is often recommended. There are two options for contributing the capital:
- Pre-incorporation bank deposit: Before signing the deed, open a bank account in the company’s name and deposit the share capital. The bank will issue a deposit certificate. However, as opening a bank account can be complex, this step is not mandatory.
- Post-incorporation deposit: The law allows the company to be formed first, with the share capital deposited into the company’s bank account after its establishment. In this case, no bank deposit certificate is required when signing the public deed.
3. Applying for a Provisional Tax ID (NIF) and Tax Registration

Once the public deed is signed, two important tasks must be completed at the Spanish Tax Agency (Agencia Tributaria):
- Apply for a Provisional Tax Identification Number (NIF Provisional): This serves as the company’s temporary identifier within the tax system.
- Complete the Census Declaration (Declaración Censal): By filling out and submitting Form 036, you declare the company’s basic information, business activities, and future tax obligations to the Tax Agency, such as VAT (IVA) and Corporate Income Tax.
4. Registering with the Mercantile Registry
Next, you must take the relevant documents to the Provincial Mercantile Registry (Registro Mercantil Provincial) of the company’s domicile for official registration. The required documents typically include:
- The original copy of the Public Deed of Incorporation.
- The Certificate of Name Uniqueness.
- The company’s Provisional Tax ID (NIF Provisional).
- Proof of submission for the Transfer Tax on Capital Operations. Although company formation is tax-exempt, the declaration process must still be completed.
5. Obtaining the Definitive Tax ID (NIF Definitivo)
Once the Mercantile Registry has completed the company’s registration, you can return to the Tax Agency with the registration receipt to exchange the provisional NIF for a Definitive Tax ID (NIF Definitivo). Obtaining the definitive NIF marks the completion of all legal steps for the company’s incorporation.
6. Registering with Social Security
After the company is formally established and before starting operations, it is also necessary to register eligible directors and shareholders with the Social Security system (Seguridad Social), depending on their specific circumstances. This is a mandatory prerequisite for legally operating the business and hiring employees.