Self-Employed Registration in Spain (Autónomos)

What becoming autónomo in Spain really involves

If you plan to work as a self-employed professional in Spain, you must register correctly with both the Spanish Tax Agency (Agencia Tributaria – AEAT) and the Social Security system (Seguridad Social – RETA). These registrations determine how you are taxed, how you invoice clients, which forms you have to file and whether you qualify for public healthcare and reduced social-security contributions.

At NomadTaxSpain, we handle the entire process for you – from choosing the right tax categories to completing the registrations, planning your taxes and setting up ongoing compliance.

The two mandatory registrations for autónomos

To operate legally as a freelancer or independent contractor in Spain, you must complete two separate but coordinated steps:

• Tax registration with AEAT (Modelo 036/037)
  • Defines your economic activity (IAE code), VAT status, tax obligations and invoicing rules.
• Social Security registration in RETA
  • Activates your self-employed status, healthcare access and monthly social-security contributions.

Both registrations must be carefully aligned, and timing is crucial. Incorrect setup can lead to penalties or backdated contributions.

Who needs to register as autónomo in Spain?

You generally need to register as autónomo if you:

• Carry out regular, independent or habitual economic activity in Spain.
• Invoice clients for professional services or business activities.
• Work as a freelancer, consultant, contractor, creative, remote professional or digital nomad.
• Earn income from self-employment that exceeds minimal or occasional thresholds.
• Combine employment and self-employment (pluriactividad).

Foreign nationals must also ensure they hold the correct work authorisation, such as a Digital Nomad Permit, Highly Qualified Professional permit, Entrepreneur visa or rights as an EU citizen.

Step 1: Tax registration with AEAT (Modelo 036/037)

We register your activity with the Spanish Tax Agency, setting the foundation for all your tax and invoicing obligations.

Choosing your IAE activity code

The IAE code is the official classification of your economic activity. Choosing it correctly is essential because it affects:

• Your VAT obligations (IVA).
• Whether you must apply withholdings on invoices.
• Your tax census classification.
• Which expenses can reasonably be considered deductible.

Defining your VAT status (IVA)

We clarify your position regarding VAT from day one:

• Whether your services are subject to VAT, and at which rate.
• Whether the reverse charge applies (for example, with EU business clients).
• How to treat Spanish, EU and non-EU clients correctly on your invoices.
• How to manage quarterly and annual VAT filings.

Income tax obligations (IRPF)

As an autónomo, you typically have to make advance payments on your income tax:

• Quarterly payments via Modelo 130 or 131, depending on your regime.
• An annual IRPF return that consolidates all your income (employment, self-employment and other sources).

Other tax obligations

Depending on your activity, you may also need to file:

• Modelo 349 for intra-EU services and operations.
• Modelo 347 for annual declarations of large transactions.
• Modelo 111/190 if you hire or subcontract others and apply withholdings on their invoices or salaries.

We determine exactly which models apply to you and configure your tax registration so that everything matches your real activity.

Step 2: Social Security registration (RETA)

Registering in the Régimen Especial de Trabajadores Autónomos (RETA) is what makes you an autónomo for Social Security purposes and gives you access to:

• Public healthcare coverage.
• Pension rights.
• Sick leave and temporary disability benefits.
• Coverage for work accidents and professional contingencies.

This registration also determines your monthly social-security contributions, which are now based on your estimated net monthly income (tramo de rendimientos).

Income-based contribution system

Spain now applies a system where autónomos contribute according to their expected net income range. We help you:

• Select the correct contribution band for your expected income.
• Adjust it over time if your actual income changes.
• Optimise contributions to balance cost, coverage and long-term pension impact.

Incentives and reduced rates for new autónomos

Many new autónomos can benefit from the reduced rate (tarifa plana), which significantly lowers Social Security contributions during the first months or years. We check your eligibility and ensure the reduction is applied correctly from the beginning.

What our Self-Employed Registration Service includes

Our aim is to make your start as an autónomo in Spain smooth, compliant and efficient. Our service typically covers:

• An initial consultation to understand your activity, clients and goals.
• Analysis of whether you need a work permit or visa to operate legally.
• Selection of the correct IAE activity code for your work.
• Complete filing of Modelo 036/037 with the Spanish Tax Agency.
• Full registration in RETA with Social Security.
• Activation of your digital certificate to manage future filings online.
• Guidance on invoicing, VAT, withholdings and required bookkeeping.
• A personalised tax calendar with all relevant deadlines.
• Explanation of deductible expenses for autónomos in your specific activity.
• Optional ongoing support for quarterly and annual compliance.

Common mistakes we help you avoid

Starting as an autónomo without proper advice can quickly lead to expensive problems. Typical issues include:

• Registering under the wrong IAE code, which misaligns VAT, withholdings and expense logic.
• Missing VAT obligations for EU or foreign clients, especially with digital services.
• Starting economic activity before filing AEAT and RETA registrations.
• Failing to apply for the reduced Social Security rate when you are eligible.
• Issuing invoices incorrectly (missing required data, wrong VAT or IRPF withholdings).
• Ignoring quarterly tax payments and incurring surcharges and penalties.

Our goal is to ensure that your freelancing activity begins correctly, efficiently and safely, with no surprises down the line.

Why freelancers and digital nomads choose NomadTaxSpain

We specialise in working with international freelancers, remote workers and digital nomads who want to operate correctly in Spain without losing time in bureaucracy.

• Expertise assisting foreign freelancers and globally mobile professionals.
• Deep understanding of how immigration and tax rules interact.
• Clear communication in English, with practical explanations.
• Full administrative handling of registrations and filings.
• Ongoing tax support available year-round for your business activity.
• Specialists based in Spain, serving clients worldwide.

Start your autónomo registration in Spain

Whether you are launching your freelancing career, working remotely from Spain or setting up a local business activity, we can complete your autónomo registration quickly and correctly.

Share your situation and activity with us and we will design a clear, step-by-step plan so that your self-employed status, taxation and Social Security are aligned from day one.