Self-Employed (Autónomo) Service Agreement Spain

A Self-Employed (Autónomo) Service Agreement Spain in Spain a Self-Employed Service Agreement Spain (Contrato de Servicios con Trabajador Autónomo) is a formal written agreement under which a self-employed professional (trabajador autónomo) agrees to provide defined services to a client (cliente or empresa principal) in exchange for agreed fees, outside of an employment relationship, governed principally by Article 3 of the Ley 20/2007, de 11 de julio, del Estatuto del Trabajo Autónomo (LETA) and Article 1544 of the Código Civil. The LETA distinguishes between the standard autónomo — who provides services to multiple clients and bears full organisational autonomy — and the TRADE (trabajador autónomo económicamente dependiente), defined in Article 11 LETA as a self-employed person who derives at least 75% of their income from a single client (cliente principal). TRADEs are entitled to additional protections under the LETA including minimum rest periods, a maximum 14-days-per-year interruption of activity equivalent to paid leave, and a special termination regime.

The boundary between a genuine self-employed service agreement (contrato de servicios con autónomo) and a disguised employment relationship (falso autónomo — false self-employment) is one of the most litigated areas of Spanish labour law. Article 8.1 of the Estatuto de los Trabajadores (RDL 2/2015) establishes a legal presumption that any agreement under which personal services are provided in exchange for remuneration is an employment contract, unless the contrary is demonstrated. The Inspección de Trabajo y Seguridad Social (ITSS) regularly investigates and reclassifies false self-employment arrangements — indicators of a dependent employment relationship include exclusivity (exclusividad), integration into the client's organisational structure (inserción en el ámbito organizativo), use of the client's tools and equipment (ajeneidad de los medios de producción), and absence of entrepreneurial risk (ajeneidad del riesgo). Reclassification results in the client being required to pay unpaid social security contributions, interest, and LISOS sanctions.

All autónomos in Spain must register with the Régimen Especial de Trabajadores Autónomos (RETA) of the Tesorería General de la Seguridad Social (TGSS) before commencing self-employed activity, under Article 12 LETA and Article 305 of the Ley General de la Seguridad Social (RDL 8/2015). RETA contributions are calculated on a base (base de cotización) chosen by the autónomo within the minimum and maximum limits established annually by the Ley de Presupuestos Generales del Estado. The cuota de autónomos contributes to the autónomo's entitlement to healthcare (prestación por incapacidad temporal), maternity/paternity benefits, and retirement pension (jubilación) under the Seguridad Social system.

Autónomos providing services in Spain must also register with the Agencia Estatal de Administración Tributaria (AEAT) — they must declare the commencement of their self-employed activity (alta censal) via Modelo 036 or 037, and comply with quarterly IVA returns (Modelo 303), quarterly IRPF income declarations (Modelo 130 — direct estimate, módulos, or simplified method), and annual IRPF return (Modelo 100). The client must apply retención a cuenta del IRPF at 15% (7% in the first three years of activity) on payments for professional services to individual autónomos, reporting on Modelo 111 quarterly and Modelo 190 annually.

The legal framework governing the Self-Employed (Autónomo) Service Agreement Spain in Spain draws on several key statutes and regulatory bodies. Under the Estatuto de los Trabajadores (ET) RDL 2/2015, Spanish employment law governs contracts, dismissals, and working conditions. The Tesorería General de la Seguridad Social (TGSS) administers social security contributions. The Servicio Público de Empleo Estatal (SEPE) manages unemployment benefits. The Inspección de Trabajo y Seguridad Social enforces labour compliance. The Juzgados de lo Social hear employment disputes under the Ley Reguladora de la Jurisdicción Social (Ley 36/2011). Parties executing a Self-Employed (Autónomo) Service Agreement Spain in Spain should confirm the document reflects current law, including any amendments enacted since the original drafting date. The Ley 20/2007 del Estatuto del Trabajo Autónomo (LETA) sets the foundational requirements.

A Self-Employed Service Agreement Spain is required whenever a company or individual engages a freelancer, consultant, or professional autónomo to provide services on a project or ongoing basis and wishes to document the agreed scope, fees, duration, and confidentiality obligations in a binding written agreement — protecting both parties from disputes over delivery, payment, and the nature of the relationship.

The Spain Self-Employed (Autónomo) Service Agreement Spain contract is required when a Spanish employer wishes to engage a professional on a self-employed basis — for IT development, marketing, design, legal advice, accounting, or any specialised service — and must establish clearly that the autónomo is not an employee, to avoid ITSS reclassification and the associated TGSS and AEAT liabilities for unpaid social security contributions and withheld IRPF.

A Self-Employed Service Agreement is needed when a client provides services to a single principal that account for 75% or more of the autónomo's income — the agreement must identify the TRADE status under Article 11 LETA and include the protections mandated by Articles 12 to 18 LETA, including the minimum interruption of activity period equivalent to 18 days and the special termination rules requiring justified cause and a minimum notice period.

The Spain Self-Employed (Autónomo) Service Agreement Spain contract is required when a foreign self-employed professional (autónomo extranjero) provides services to a Spanish client — the agreement governs the service relationship and must address the applicable tax withholding and the VAT treatment depending on whether the services are subject to Spanish IVA under the reverse charge mechanism (inversión del sujeto pasivo) of Article 84.1.2 Ley 37/1992.

A Self-Employed Service Agreement is needed when a company engages a professional autónomo for a defined project with milestones and deliverables — documenting the project scope, acceptance criteria, payment schedule, and intellectual property ownership (cesión de derechos de propiedad intelectual) is essential for complex creative, technical, or consultancy projects.

The Spain Self-Employed (Autónomo) Service Agreement Spain contract is also required when an autónomo provides services remotely (teletrabajo autónomo) and the parties wish to establish the communication protocols, working hours flexibility, data security obligations, and equipment responsibility applicable to the remote service delivery.

A valid Self-Employed Service Agreement Spain under Ley 20/2007 del Estatuto del Trabajo Autónomo and Código Civil Article 1544 must include the following essential elements to be enforceable and to resist potential reclassification as an employment contract.

Identification of Parties: Full legal names, DNI/NIE/NIF, and addresses of both the autónomo (service provider) and the client (empresa principal). The autónomo's RETA affiliation number (número de afiliación a la Seguridad Social — RETA) and tax identification (NIF with alta censal — Modelo 036/037) should be stated to demonstrate genuine self-employed status. If the autónomo is a TRADE under Article 11 LETA, this must be expressly stated.

Scope of Services: A specific description of the services to be provided — avoiding the broad integrative language that indicates employment (e.g. "be available during business hours", "report to the marketing director", "use only company tools"). Indicators of genuine self-employment should be reflected: the autónomo uses their own tools and equipment, organises their own time, may perform services for other clients simultaneously, and bears entrepreneurial risk. The ITSS's criteria for distinguishing genuine self-employment from false self-employment must be borne in mind throughout the drafting.

Fees and Payment: The agreed project fee, daily rate, or monthly retainer, plus IVA at 21%. The client's obligation to apply retención a cuenta del IRPF at 15% (7% for autónomos in their first three years of activity) under Article 101 Ley 35/2006 and to report on Modelo 111 and Modelo 190 to the AEAT. Payment due dates and late payment interest under Ley 3/2004 de Lucha contra la Morosidad.

TRADE Provisions (if applicable): Where the autónomo is a TRADE under Article 11 LETA — earning at least 75% of income from this client — the contract must include: minimum rest periods under Article 14 LETA; an annual activity interruption period equivalent to 18 working days; termination rules requiring justified cause under Article 15 LETA; and registration of the TRADE agreement with the Servicio Público de Empleo Estatal (SEPE) under Article 12.1 LETA.

Organisational Autonomy: Express provisions confirming that the autónomo organises their own working time, provides services from their own premises or equipment, is free to provide the same services to other clients (unless a specific exclusivity clause applies), and assumes the risk of non-performance under Article 1544 CC. These provisions are critical evidence against reclassification as employment.

Intellectual Property: Where the services produce creative or technical output — software, designs, written content, data analysis — express assignment (cesión) of intellectual property rights to the client under Article 17 of the Ley de Propiedad Intelectual (Real Decreto Legislativo 1/1996 — TRLPI) or a licence grant, covering the territory, duration, and scope of exploitation.

Confidentiality: A binding obligation on the autónomo to maintain confidentiality of all client information during and after the service mandate, consistent with the autónomo's professional obligations and data protection requirements under RGPD and LOPDGDD. A data processing agreement under Article 28 RGPD where the autónomo processes personal data on behalf of the client.

Termination: Notice periods and grounds for termination — for cause (material breach, insolvency, gross negligence) without notice, and without cause with the agreed notice period. TRADE-specific termination provisions under Article 15 LETA where applicable. Accrued but unpaid fees remain payable on termination regardless of cause.

Forms-legal.com provides this Self-Employed Service Agreement Spain template as a practical reference. Both parties should obtain advice from a qualified abogado laboralista or gestor to assess the risk of ITSS reclassification in their specific situation.