Registering as self-employed (autónomo)

It is for anyone considering, planning or carrying out a move to Spain. After reading, you will know whether and how to register, in the right order, with the right activity code and no avoidable fines.

Start with "Do you need to register as self-employed (autónomo)?". It helps you judge whether occasional jobs, side income or platform sales count as self-employment. If you already know you need to register, go to "How to register as self-employed (autónomo), step by step" for the full journey.

Key rules

• Social Security alta: You can ask for the Social Security self-employed alta up to 60 days before your activity starts, and no later than the start date.
• Registration order: Register with the tax office first, then with Social Security, and only once you hold your foreigner ID number and valid work authorisation.
• Registration test: Habitual, personal activity done for profit on your own account must be registered.
• Occasional income: Truly occasional income does not need registration, but regular, organised income does, on any platform.
• Real activity: Choose the epígrafe and CNAE that match the work you really do, because they drive withholding, VAT and filings.
• Several activities: You can declare several activities on one census declaration, each with its own epígrafe and CNAE.

Registering as self-employed (autónomo): the whole process, step by step

• Check you need to register at all (Do you need to register as self-employed (autónomo)?): before you start any paid work

• Get your foreigner ID number (NIE), electronic identity and bank details in place (What you need in place before you can register). A non-EU national also needs a work and residence permit.: before you file anything

• Pick your activity code (Choosing the right activity code (epígrafe) for your work): before you file the tax census form

• File the tax census form (modelo 036) with the tax agency (How to register as self-employed (autónomo), step by step): before the activity starts, and before your first operations or payments

• Ask for the Social Security self-employed alta (How to register as self-employed (autónomo), step by step): up to 60 days before your activity starts, and no later than the start date

• Your contributions start from the activity start date if you filed in time; a late alta takes effect from the application date and can bring a surcharge: from the activity start date

• Issue your first invoice (Your first 90 days as self-employed (autónomo)): once the tax registration is done and you have your tax number; for business clients, by the 16th of the month after the sale

• See your first monthly Social Security quota debited, paid at the end of the month (Your first 90 days as self-employed (autónomo)): in the last days of the month after the alta is processed

• File your first quarterly tax returns (Your first 90 days as self-employed (autónomo)): 1–20 April, 1–20 July, 1–20 October, and 1–30 January for the last quarter

Documents you may need

Identity and residence

• Your NIE
• Work and residence permit — Registering or invoicing before you move to Spain
• Tax residence certificate from your home country — Registering or invoicing before you move to Spain

Income and work

• The tax census form — How to register as self-employed (autónomo), step by step
• The Social Security self-employed registration form — How to register as self-employed (autónomo), step by step

The home and the lease

• Proof of a fiscal address in Spain — What you need in place before you can register

Payments and receipts

• Your invoice — Your first 90 days as self-employed (autónomo)

Other documents

• One way to identify yourself — What you need in place before you can register
• EU citizen registration certificate — Registering or invoicing before you move to Spain
• A digital certificate — How to register as self-employed (autónomo), step by step

Registering as self-employed (autónomo): questions that cross several articles

Does occasional or platform income mean I must register as self-employed?

Truly occasional income does not require registration, but regular, organised income for profit does, whatever the platform. Selling only your own second-hand items is generally not self-employment, while regular resale, gig work or content creation with continuing income is. Read Do you need to register as self-employed (autónomo)? to judge your case.

Does earning less than the minimum wage mean I can skip registration?

No, earning less than the minimum wage does not by itself exempt you from registering. Earning more does not prove you are self-employed either, because the real facts count: continuity, organisation and the nature of the work. Do you need to register as self-employed (autónomo)? explains how to judge this.

What happens if I work without registering as self-employed?

Working without registration is an infringement: Social Security can register you itself, charge unpaid contributions with a surcharge and interest, and a fine can follow. Late registration also loses the reduced-fee schemes. How to register as self-employed (autónomo), step by step shows how to avoid this.

Can I register as self-employed before I live in Spain?

Normally no, because Social Security registration requires habitual residence in Spain and work done in Spain. You can get a foreigner ID number first if you have an interest in Spain, but it does not give the right to work. See Registering or invoicing before you move to Spain and What you need in place before you can register.

Which forms and channels do I use for the tax and Social Security registrations?

You file the tax census form (modelo 036) and the Social Security alta application (form TA.0521/1) online with a digital certificate or Cl@ve. A registered representative (gestor) can file for you, and in-person filing is limited and usually by appointment. Both steps are laid out in How to register as self-employed (autónomo), step by step.