Alta de Autónomo en España: How Mexicans Register as Self-Employed

If you arrive in Spain on a Digital Nomad Visa with freelance income, or you transition from an employed role to independent work after getting residency, you will at some point face the autónomo registration. This is Spain's self-employed regime — generally required for anyone carrying out an economic activity on their own account. It is more bureaucratic than setting up as a freelancer in Mexico, and the social security cost is one of the most common financial surprises for newly arrived Mexican professionals.

This post explains exactly what alta de autónomo means, when Mexicans need to do it, when the bilateral agreement with IMSS lets you avoid it, and how the 2023 RETA reform changed the cost structure.

What Is an Autónomo?

An autónomo (or trabajador autónomo) is Spain's legal status for self-employed workers — freelancers, independent consultants, sole traders, and entrepreneurs who work without an employment contract. If you are:

• Freelancing for Spanish clients
• Running a small business in Spain
• Providing professional services commercially, even to a single client, on an ongoing basis

...you generally need to register as autónomo. Failing to register when the obligation applies can create tax and social-security non-compliance.

The two registrations involved in alta de autónomo are:

1. Hacienda (AEAT): Register your economic activity for tax purposes via Form 036 or Form 037
2. Seguridad Social (RETA): Register for Spain's self-employed social security regime and begin paying monthly contributions

Both registrations must be completed before you begin commercial activity.

When Mexicans Must Register as Autónomo

As a Mexican on a Digital Nomad Visa (DNV), your visa permits you to work for companies or clients located primarily outside Spain (with no more than 20% of income from Spanish sources). This is remote work for a foreign employer.

If your work situation falls into one of these categories, autónomo registration is typically required:

• You are a freelancer with multiple international clients (not a single employer relationship)
• You work for Spanish clients at all, even if they represent less than 20% of your income
• You transition to Spanish clients after getting long-term residency
• You provide services through a Spanish-registered entity

The exception: Digital Nomad Visa holders with a single foreign employer

If you hold a DNV and work exclusively for one foreign company under what is effectively an employment relationship (single employer, fixed salary, no Spanish clients), some tax advisors structure this as a telework arrangement rather than self-employment. The line between "employed remote worker" and "freelancer" determines which regime applies. Get specific tax advice for your situation.

The IMSS Bilateral Agreement: When You Can Skip RETA

If you have the Certificado de Cobertura from IMSS (obtained before leaving Mexico), and you continue contributing to the Mexican social security system, you can present this certificate to Spain's Tesorería General de la Seguridad Social (TGSS) and be exempt from RETA contributions for up to two years (renewable).

This is the most financially significant decision a self-employed Mexican makes in the first two years in Spain.

RETA 2026 cost comparison:

• With Certificado de Cobertura: Continue IMSS contributions in Mexico (the amount depends on your IMSS enrollment and salary arrangement) + private health insurance in Spain that meets the applicable no-copayment, no-waiting-period, and full-coverage requirements
• Without Certificado de Cobertura (RETA): 2026 contributions follow net-income brackets, from approximately €230 at or below €670 net monthly income to €530-plus above €3,620; eligible new autónomos may qualify for the tarifa plana

The crossover point depends on your income level. For most Mexican professionals earning comfortably above the minimum RETA base, the Certificado de Cobertura option is cheaper in the short term. After the 2-year exemption expires (and if you do not renew it), you must register with RETA.

The 2023 RETA Reform: How Contributions Work in 2026

Spain's 2023 RETA reform replaced the flat-rate contribution system with a graduated scale based on actual net income. Previously, autónomos paid a fixed rate regardless of earnings. Now, contributions are tiered:

These are approximate 2026 figures; check the current Seguridad Social table before registering.

New autónomos (first registration) receive an approximately €80/month rate for the first 12 months (the cuota reducida for new self-employed workers), regardless of income. This is a significant incentive for Mexicans newly registering as autónomo for the first time in Spain.

After 12 months, contributions generally shift to the income-graduated scale above; some autonomous communities offer an approximately €160 reduced rate for months 13–18, so check the current regional rule.

How to Register: Step-by-Step

Step 1: Get your NIE and TIE You cannot register as autónomo without an NIE (Número de Identificación de Extranjero) and, once resident, your TIE (Tarjeta de Identidad de Extranjero). The NIE is assigned at the consulate; the TIE is obtained in Spain.

Step 2: Decide your IAE epigraph The Impuesto de Actividades Económicas (IAE) has an epigraph for every professional activity. You register under the code that most closely matches what you do. Common epigraphs for Mexican professionals:

• Software development and IT consulting: Section I, various technical services codes
• Marketing and communications: Group 844 or similar
• Business consulting: Group 841
• Architecture, engineering: regulated profession codes
• Teaching and tutoring: Group 932 or similar

If in doubt, use Actividades Diversas de Servicios as a catch-all, or consult a gestor for the correct code.

Step 3: File Form 036 or 037 with AEAT (Hacienda) Form 037 (simplified) works for most straightforward self-employed registrations. File it through the AEAT online portal (sede.agenciatributaria.gob.es) or in person at your local tax office. This registers you for IRPF (income tax) and, if you have Spanish clients, for IVA (VAT).

Step 4: Register with RETA via Social Security File Form TA.0521 (Solicitud de Alta/Baja en el Régimen Especial de Trabajadores Autónomos) with the Tesorería General de la Seguridad Social (TGSS). This can be done through the Social Security online portal or in person at a TGSS office.

If you are using the Certificado de Cobertura from IMSS, present it at this step to the TGSS to register your exemption instead of full RETA enrollment.

Step 5: Set up quarterly tax filings As an autónomo, you file and pay taxes quarterly:

• Model 130: Quarterly IRPF estimated payment (if your income is not subject to Spanish withholding)
• Model 303: Quarterly IVA return when applicable; for B2B clients established outside Spain, place-of-supply rules generally mean no Spanish IVA, but the client and service type matter

Most Mexican autónomos hire a gestor or asesor fiscal for the quarterly filings, particularly in the first year. Fees run approximately €80–€150/month for monthly bookkeeping and quarterly filings.

VAT (IVA): Do Mexicans Need to Charge It?

This is one of the most common questions. The answer depends entirely on where your clients are:

• Clients in Spain: Yes, charge Spanish IVA at 21% (standard rate for most professional services)
• Clients in other EU countries: If they are VAT-registered businesses, apply reverse charge (no Spanish IVA). If private individuals, charge Spanish IVA.
• Clients outside the EU (including Mexico and the US): B2B services to clients established outside Spain generally do not carry Spanish IVA under place-of-supply rules, but the client and service type matter.

For Mexican professionals working for B2B clients in Mexico, the US, or other non-EU countries on a Digital Nomad Visa, Spanish IVA is generally not charged under the applicable place-of-supply rules. Whether a Model 303 is required and what it reports depends on the activity and client mix.

The Practical First Month as Autónomo in Spain

Week 1: Register with AEAT (Form 037) and TGSS (either RETA or Certificado de Cobertura submission) Week 2: Open a dedicated Spanish business account or earmark an account section for autónomo transactions — cleaner for quarterly filings Week 3: Set up quarterly filing reminders (April 20, July 20, October 20, January 30 are the quarterly deadlines) Month 1: Find a gestor if you have not already — the quarterly deadlines come faster than expected and the Spanish tax system punishes late filings with automatic surcharges

The Mexico to Spain Work Visa Guide includes a comparison of the Certificado de Cobertura route versus full RETA registration, with cost scenarios at different income levels and a first-90-days administrative checklist for Mexican autónomos.

See more Spain guides →