How to Register as Self-Employed in Spain: Requirements and Procedure

The Reality of Self-Employed Work in 2026

Being self-employed in Spain involves exercising an economic activity habitually, personally, and directly for profit, without being subject to an employment contract. In 2026, the system has become almost entirely digital, allowing most procedures to be carried out using the Digital Certificate or Cl@ve system.

This step is not only a declaration of professional independence but also entails a series of tax responsibilities with the Tax Agency and social security contributions with the Social Security.

Fundamental Requirements Before Starting

Legal Identification

It is mandatory to possess a valid DNI or, for foreign citizens, a valid NIE. You cannot start the procedure with expired documents.

Residence and Address

You must be correctly registered in the Municipal Register (Padrón). The fiscal address can coincide with your habitual residence if you work from home.

Social Security Number

You need to have an assigned Social Security Number (NAF). Without this number, it is not possible to process the registration in the RETA.

The Registration Process in 3 Stages

Following the correct order is crucial to avoid penalties and problems with the administration.

01 Tax Agency (AEAT)

02 Social Security (RETA)

03 City Halls and Others

1. Registration with the Tax Agency: Forms 036 and 037

The first official step is to register in the Census of Entrepreneurs, Professionals, and Retainers. This is done through the Electronic Office of the Tax Agency.

Form 037: Simplified version for most individual self-employed residents in Spain.
Form 036: Full version, necessary if you are going to carry out intra-community sales or have complex activities.

Key points with the Tax Agency:

You must choose your IAE (Economic Activities Tax) heading. This will define if your invoices carry IRPF withholding and what type of VAT you should apply.

See details of Forms 036/037 →

2. Registration in the RETA (Social Security)

Once the registration with the Tax Agency is processed, you have a maximum period to register in the Special Regime for Self-Employed Workers (RETA). In 2026, this is mandatory through the portal Importass.

Fee based on Real Income

Since 2023, you contribute based on your expected net returns. You must communicate an income forecast.

Flat Rate 2026

If it is your first time or more than 2 years have passed (3 if you enjoyed a bonus), you can benefit from the reduced fee of approximately €80/month.

Important: Registration with Social Security must be concurrent with or after registration with the Tax Agency, never after the start of activity.

3. Opening Licenses and Membership

Depending on your activity and whether you will have a physical premises, you might need additional procedures at your City Hall:

Activity License: For commercial premises, offices open to the public, or workshops.
Prior Communication: A more agile procedure for low-risk businesses.
Civil Liability Insurance: Highly recommended and mandatory in certain professions (healthcare, lawyers, architects).
Professional Membership: If you practice a regulated profession, it is a prerequisite.

2026 Self-Employed Fee Simulator

Calculate your estimated monthly fee based on the net returns system.

Estimated Monthly Net Income (€)

Estimated Contribution Base: 0.00 €

MONTHLY FEE: 0.00 €

*This calculation is a simplified estimate for the year 2026. The exact brackets depend on the General State Budgets and the annual regularization of Social Security.

Obligations After Registration

Registering is only the beginning. As a self-employed person, you become the manager of your own taxes and accounting. Strict compliance is vital to avoid fines from the Tax Agency (AEAT).

1

Legal Invoicing

Mandatory issuance of invoices with all requirements: fiscal data, breakdown of VAT (IVA) and, if applicable, IRPF withholding.

2

Record Books

You must keep the Issued Invoices, Received Invoices, Investment Goods, and Expenses Book up to date. Digitalization is mandatory in 2026.

3

Quarterly Declarations

Submission of forms 303 (VAT) and 130 or 131 (IRPF payments on account) every quarter.

Professional Tip: Always separate your finances. Open a bank account exclusively for your professional activity. This greatly facilitates Tax Agency audits.

21% General VAT

7% - 15% IRPF Withholding

Self-Employed or Limited Company?

Before registering, evaluate if the figure of the self-employed worker is the one that best adapts to your projected business volume.

Concept	Self-Employed (Individual)	Limited Company (S.L.)
Incorporation Cost	Zero (or minimal administrative cost)	Approx. €600 - €1000 (Notary, Registry)
Minimum Capital	Not required	€1 (but €3,000 recommended)
Liability	Unlimited (you respond with your assets)	Limited to company capital
Taxes	IRPF (Scalable up to 47%)	Corporate Tax (Fixed 23-25%)
Accounting Management	Simple (Record Books)	Complex (Mercantile Accounting)

Are you interested in creating a more robust structure?

Complete Guide to Creating a Company →

Download your Self-Employed Registration Checklist

Don't leave any document behind. We have prepared an exhaustive checklist in PDF with all the steps and documents necessary for registration in 2026.

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PDF

Frequently Asked Questions about Registration

How much does it cost to register as self-employed?

The registration process itself is free if you do it yourself online. However, from the first month you must pay the Social Security fee (about €80 if you have the Flat Rate or according to your income if you don't). You could also have agency costs (between €40 and €80/month).

Can I be self-employed and work for someone else (Pluriactivity)?

Yes, it is called pluriactivity. There are specific bonuses in the self-employed fee for people in this situation, provided that the work for someone else is full-time or more than 50%.

Is a digital certificate mandatory for registration?

In practice, yes. Almost all communications with Social Security and the Tax Agency are mandatory electronically for the self-employed. We recommend obtaining it before starting.

What is the IAE and how do I choose mine?

The Economic Activities Tax is a code that classifies your commercial or professional activity. It is essential to choose the correct one as it determines your VAT and IRPF obligations.

Can I deduct the VAT from my purchases before registering?

Only if you perform a prior registration with form 036 marking the box for "start of activity without delivery of goods". This allows you to deduct preparatory expenses before starting to invoice.

When is the self-employed fee paid?

Social Security issues the receipt by direct debit on the last working day of each month. Make sure you have enough balance to avoid surcharges of 10% to 20%.

What happens if my income is less than the Minimum Wage (SMI)?

With the new system of 2026, if your income is very low, there are reduced contribution brackets. However, registration is still mandatory if the activity is habitual.

How does retirement work for the self-employed?

By contributing to the RETA, you generate the right to retirement. The amount will depend on the bases you have contributed to throughout your working life. Check your work life certificate regularly.

What is the ROI and when to request it?

The Register of Intra-Community Operators (ROI) allows you to issue and receive invoices without VAT from companies in other European Union countries. It is requested using form 036.

Can I hire workers being self-employed?

Yes, a self-employed person can hire employees. To do this, they must register as an employer with Social Security and obtain a Contribution Account Code (CCC).

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How to Register as Self-Employed in Spain: Definitive Guide 2026