Registering as an Autónomo in Spain: Steps and Obligations

🇪🇸 Read the original in Spanish

Starting an economic activity as a self-employed individual in Spain is a brave and strategic decision, but one that requires navigating a bureaucratic labyrinth that often sparks doubts and insecurity. The process of setting up on your own is not limited to a mere declaration of intent; it requires formal legal and tax registration with the public administrations to avoid penalties that could jeopardise the viability of your project. In this guide prepared by the legal team at AbogadoAI, we break down with technical rigour and in an accessible way all the steps, deadlines, costs, and legal obligations you need to know to register as an autónomo (self-employed worker) with complete legal certainty.

The Legal Framework of Self-Employment in Spain

To understand the obligations of a self-employed worker, it is essential to look at the legal sources that regulate this status. The reference regulatory framework is mainly supported by three pillars:

1. *The Ley 20/2007, de 11 de julio, del Estatuto del Trabajo Autónomo (LETA - Law on the Statute of Self-Employed Work): This is the overarching regulation that defines the figure of the autónomo* in its Article 1 as a natural person who habitually, personally, directly, on their own account, and outside the scope of direction and organisation of another person, carries out an economic or professional activity for profit.
2. *The Ley General de la Seguridad Social (LGSS - General Social Security Law, approved by Real Decreto Legislativo 8/2015, de 30 de octubre): This regulates registration in the Régimen Especial de Trabajadores por Cuenta Propia o Autónomos* (RETA - Special Scheme for Self-Employed Workers), contributions, and the benefits to which one is entitled (temporary disability, retirement, cessation of activity, etc.).
3. *The Ley 58/2003, de 17 de diciembre, General Tributaria (LGT - General Tax Law): Which, together with the specific laws on IRPF (personal income tax) and IVA (VAT), governs the tax obligations of the self-employed before the Agencia Estatal de Administración Tributaria (AEAT - State Tax Administration Agency, commonly known as Hacienda*).

An aspect that generates constant legal debate is the concept of "habitual nature" (habitualidad). Although there is no economic threshold fixed by law, the jurisprudence of the Supreme Court has traditionally established the exceeding of the Salario Mínimo Interprofesional (SMI - Minimum Interprofessional Wage) in the annual calculation as an indication of habitual activity. However, carrying out an activity open to the public or on a continuous basis over time obliges registration in the RETA from the very first euro earned, regardless of the volume of income.

Step by Step: How to Register as an Autónomo in 2024

The registration process is carried out electronically and consists of two mandatory steps before different administrations. It is crucial to respect the order and deadlines to avoid surcharges.

Step 1: Registration with the Tax Agency (Hacienda)

Before starting any activity or issuing your first invoice, you must inform Hacienda of what you are going to do, where, and how you will pay taxes.

• How is it done? You submit Modelo 036 (standard tax registration form) or Modelo 037 (simplified version, valid for the vast majority of self-employed individuals).
• What must you choose?
• *The IAE (Impuesto sobre Actividades Económicas - Economic Activities Tax) heading: Regulated in Real Decreto Legislativo 1175/1990*. You must place your activity under the code that best fits your profession (business, professional, or artistic).
• *The VAT (IVA) regime: Generally the general regime, unless your activity is exempt (such as teaching or medicine) or subject to special regimes such as the recargo de equivalencia* (equivalence surcharge for retail trade).
• *The personal income tax (IRPF) regime: Usually the estimación directa simplificada* (simplified direct estimation) regime.

Step 2: Registration with the Social Security (RETA)

Once the tax registration forms have been submitted to Hacienda, you must request your affiliation and registration in the Régimen Especial de Trabajadores por Cuenta Propia o Autónomos (RETA).

• How is it done? Through the "Importass" portal of the Tesorería General de la Seguridad Social (TGSS - General Social Security Treasury), using a digital certificate, electronic DNI, or Cl@ve PIN.
• Strict legal deadline: Registration with the Social Security must be requested up to 60 days before the start of the activity declared in the Hacienda form, or at the latest on the same day of the start. If you register late (with retroactive effect), you will lose the right to discounts such as the Tarifa Plana (Flat Rate) and surcharges of between 10% and 20% will be applied to your contributions.

Deadlines, Amounts, and the New Contribution System Based on Real Income

Since 1 January 2023, Spain has applied a contribution system for the self-employed based on actual net earnings. It is no longer possible to freely choose the minimum contribution base arbitrarily.

Net Earnings and Contribution Tables

To calculate your monthly contribution, you must estimate your net earnings (income minus deductible expenses, to which a deduction for hard-to-justify expenses of 7% is applied for individual autónomos or 3% for corporate autónomos). With that figure, you fit into one of the brackets of the tables approved annually by the Government.

For 2024, the monthly contributions range between:

• A minimum contribution of 230 € per month for those with net earnings less than or equal to the Salario Mínimo Interprofesional (SMI).
• A maximum contribution of up to 542.13 € per month in the upper bracket of earnings (more than 6,000 € per month).

The Flat Rate (Tarifa Plana) for New Autónomos

If this is your first registration or you have not been registered in the RETA in the last 2 years (3 years if you already enjoyed a discount previously), you can request the Tarifa Plana of 80 € per month during the first 12 months.

This benefit can be extended for an additional 12 months (second year) if your net earnings during the first year do not exceed the annual Salario Mínimo Interprofesional (SMI) in force. Furthermore, autonomous communities such as Madrid, Andalusia, Murcia, or Galicia offer the so-called "Cuota Cero" (Zero Fee), subsidising 100% of this flat rate during the first year (and sometimes the second).

Practical Examples of Taxation and Contributions

To understand the financial impact of these obligations, we will analyse two common profiles of autónomos in Spain.

Example 1: Carlos, Graphic Designer (Professional in Simplified Direct Estimation)

Carlos registers as an autónomo for the first time in Madrid and is entitled to the Tarifa Plana. He forecasts a monthly income of 2,500 € and deductible expenses (software, internet, agency fees) of 300 €.

• First year (Flat Rate): Carlos pays a fixed fee of 80 € per month to the Social Security. Thanks to the "Cuota Cero" of the Community of Madrid, he requests the refund of these fees at the end of the year, so his actual contribution cost is 0 €.
• Second year (Contribution based on real income):
• Gross annual income: 30,000 €
• Deductible expenses: 3,600 €
• Net earnings: 26,400 €
• Application of the deduction for hard-to-justify expenses (7%): 1,848 €
• Net taxable earnings: 24,552 € per year (equivalent to 2,046 € per month).
• RETA contribution 2024: Being in the income bracket between 1,850 € and 2,030 €, he corresponds to a minimum monthly contribution of 320 €.
• IRPF withholdings: As a professional invoicing other companies, he applies a withholding of 15% (or 7% during the first three years of activity) on his invoices, which his clients pay directly to Hacienda on his behalf.

Example 2: Sofía, Owner of a Fashion E-commerce (Business Owner in Equivalence Surcharge)

Sofía sells clothes online to final consumers (B2C). As this is retail trade, she is obliged to pay VAT under the recargo de equivalencia (equivalence surcharge) regime. Her estimated income is 4,000 € per month and her expenses for purchasing inventory and advertising are 2,000 €. She is not entitled to the flat rate because she was an autónomo a year ago.

• Estimated net taxable earnings: 1,860 € per month (after applying the 7% deduction for hard-to-justify expenses).
• RETA contribution: She corresponds to a monthly contribution of 320 €.
• VAT Particularity: Sofía does not submit quarterly VAT returns (Modelo 303). In exchange, when she buys inventory from her suppliers, they charge her the normal VAT (21%) plus an equivalence surcharge of 5.2%. Sofía sells the clothes to her customers with 21% VAT and keeps all the VAT collected, thus compensating for the surcharge paid to her suppliers.

Errors You Must Avoid When Registering

Making mistakes in the registration process can lead to immediate financial penalties or the loss of important tax and contribution benefits. Pay special attention to these points:

• Registering with Hacienda before Social Security out of time: If the Social Security detects that the start date of the activity in Hacienda is prior to the application for registration in the RETA (beyond the limit of the same month), they will register you officially with retroactive effect. This will automatically cancel your right to the Tarifa Plana of 80 € and will require you to pay the full contributions with a 20% surcharge.
• Not requesting discounts at the time of registration: Benefits such as the Tarifa Plana or discounts for family reconciliation must be explicitly checked on the TGSS registration forms. They are not applied automatically with retroactive effect if you forget to request them.
• Confusing deductible expenses related to the activity: Hacienda is extremely strict regarding the deductibility of expenses. Concepts such as a private vehicle, clothing, or business meals are only deductible if it is unequivocally proven that they are exclusively for the economic activity. In the case of working from home, you can only deduct the percentage of utilities (water, electricity, gas) resulting from applying 30% to the proportion of square meters of the home intended for the activity relative to its total area, unless proven otherwise (according to Article 30.5 of the Ley del IRPF).
• Not issuing invoices with legal requirements: Every invoice must contain the serial number, date, complete tax details of the issuer and recipient (NIF, name, and address), breakdown of the taxable base, VAT rate, and IRPF withholding if applicable. Failure to comply with the Invoicing Regulations (Real Decreto 1619/2012) can lead to penalties of up to 1% of the amount of the incorrect invoices.

Frequently Asked Questions (FAQ)

Can I be an autónomo and an employee at the same time?

Yes, this legal situation is known as pluriactividad (multiple activities). If you are hired by a company on a full-time or part-time basis and also carry out an activity on your own account, you must register in the RETA. Spanish legislation offers specific discounts on the autónomo contribution for situations of pluriactividad, allowing a reduction of the contribution base by up to 50% of the minimum base during the first 18 months, provided that you do not opt for the Tarifa Plana (both discounts are incompatible).

What taxes must I file quarterly?

As a general rule, an autónomo must present every quarter (in April, July, October, and January):

• Modelo 303: VAT self-assessment (the difference between the VAT charged to your clients and the VAT paid on your purchases).
• Modelo 130: Fractional payment of IRPF, where you pay on account 20% of your accumulated net earnings since the beginning of the year (unless you are a professional and more than 70% of your income is subject to withholding).
• Modelo 111 and Modelo 115: If you have employees under your charge, hire services from professionals with withholding, or pay rent for commercial premises.

What happens if I have no income in a month? Do I still have to pay the contribution?

Yes. The obligation to contribute to the RETA is monthly and independent of whether you have invoiced or not, as long as you keep your registration active. However, with the contribution system based on real income, you can anticipate a drop in income and modify your contribution base up to 6 times a year through the Importass portal to adapt your contribution to your financial reality. If the inactivity is going to be prolonged, it is advisable to process a temporary de-registration (baja) with Hacienda and Social Security.

Am I entitled to "unemployment benefits" as an autónomo?

Yes, the self-employed are entitled to the benefit for cese de actividad (cessation of activity, colloquially known as the "unemployment benefit for the self-employed"), regulated in Article 327 and following of the LGSS. To access it, it is necessary to have contributed for this contingency for a minimum of 12 continuous months immediately prior to the cessation, and to prove that the closure of the activity is due to economic, technical, productive, or force majeure reasons duly justified (for example, losses exceeding 10% in one year).

In Summary

• Double registration obligation: It is mandatory to register with both the Tax Agency (Modelo 036/037) and the Social Security (RETA) in a coordinated manner.
• Contribution by real income: Since 2023, your monthly autónomo fee is calculated based on your actual annual net earnings, with fees in 2024 starting from 230 €.
• Flat Rate of 80 €: New autónomos can benefit from a reduced fee during the first year, extendable to a second year if their income does not exceed the SMI.
• Penalties for delay: Requesting registration late with the Social Security leads to the loss of discounts and immediate surcharges of up to 20% on your monthly contributions.
• Strict tax obligations: You must submit quarterly VAT and IRPF declarations and keep orderly accounts to properly justify your income and deductible expenses.

General legal information, not personalised legal advice. For your specific situation, ask your question for free at AbogadoAI — answers grounded in Spanish law (BOE), in English.

This is general information, not legal advice. Verify on the BOE or consult a lawyer for your specific case.