Hiring Contractors in Spain (2026): Autónomo vs Employee, and How to Keep It Compliant

Hiring a contractor in Spain is legal and common, and a foreign company can do it directly, with no Spanish entity: the contractor, known in Spain as an autónomo, invoices your company for their services and pays their own Social Security contributions. The line to watch is false self-employment (falso autónomo), where someone registered as a contractor works in practice as an employee, inside your organisation and under your direction. The facts decide, not the contract. When the work is defined by deliverables, the engineer organises their own time and tools and can have other clients, the contractor relationship is genuine.

What false self-employment (falso autónomo) means in Spain#

False self-employment is when a professional registered as self-employed in Spain actually works as an employee. Under Article 1.1 of Spain's Workers' Statute, an employee is anyone who provides paid services "for another's account and within the scope of organisation and direction" of another person, the employer (Kulturo's translation of the Spanish text). If the relationship fits that definition, it is employment, even if the contract says "professional services".

That definition contains the two tests that separate employment from self-employment in Spain. Dependence means working inside someone else's organisation and under their direction: hours, instructions and control. Alienness (ajenidad) means working for someone else's account: the output belongs to the client, and so does the business risk.

Article 8.1 of the Workers' Statute adds a presumption: an employment contract is presumed to exist between anyone who provides a service within another's organisation and direction and the party that receives it in exchange for pay. That is why a well-drafted services agreement is not enough if the day-to-day reality is that of an employee.

A genuine autónomo is the opposite. Article 1.1 of Spain's Self-Employed Workers' Statute (Law 20/2007) describes one as someone who works habitually, personally and directly, on their own account and outside anyone else's organisation and direction.

Can a US company pay a Spanish freelancer directly?#

Yes. A company in the United States, the United Kingdom or any other country can hire a Spanish autónomo directly, without opening a Spanish company or registering as an employer in Spain. The relationship is a services contract between your company and the professional: the contractor issues an invoice, you pay it, and each side handles its own tax obligations.

Several US companies hire engineers this way today through Kulturo, fully remote from Spain, according to the agency: Kulturo runs the search and the engineer invoices the company directly.

The contractor route fits project work, or a senior engineer who already works independently, best. For a full-time role inside your team, employment fits better, either through your own entity or through an employer of record (EOR).

How to hire a contractor in Spain compliantly#

A relationship with a Spanish contractor stays genuine when both the contract and the day-to-day show independence. These six steps apply to a software developer, a data engineer or a DevOps engineer working as an autónomo for a company, Spanish or foreign:

1. Define the engagement by project or deliverables. The services agreement describes what gets delivered (a module, a Kubernetes migration, an API) and how it is accepted, not a job title or working hours.
2. Let the contractor set their own schedule. You can agree overlap windows for team meetings, but the engineer decides when and how to work the rest of the time.
3. Have the contractor use their own equipment. Their laptop, their licences and their workplace. Access to your repositories and environments is a technical need of the engagement, not a sign of dependence.
4. Do not require exclusivity. A contractor can have other clients, and the agreement should say so.
5. Keep the contractor out of the org chart. No internal job title, no direct reports, no approving holidays or running performance reviews as you would for staff.
6. Review the engagement periodically. Every so often, check whether the work is still a project or has turned into a permanent role on the team. If it is the latter, it is time to switch routes.

How a Spanish contractor invoices a client outside Spain#

A Spanish autónomo who provides services to a business established outside the European Union invoices without Spanish VAT: according to Spain's Tax Agency (Agencia Tributaria), that supply is not subject to Spanish VAT, and the contractor keeps the right to deduct the VAT they pay on purchases for that activity.

If the client is a business in another EU member state, the Tax Agency treats it as an intra-community supply of services, reported on form 349. In both cases, the foreign company pays the invoice into the contractor's account and withholds no Spanish tax.

The client company does not register with Spanish Social Security for a contractor: the autónomo pays their own contributions. Declaring their income and their Spanish income tax (IRPF) is the contractor's responsibility.

What a TRADE contractor is in Spain#

A TRADE (trabajador autónomo económicamente dependiente, or economically dependent self-employed worker) is a contractor who earns at least 75% of their income from a single client. Article 11 of Law 20/2007 defines it. A TRADE is still self-employed, not an employee, but the law gives them extra protections towards that main client.

Besides the 75% threshold, Article 11.2 requires a TRADE to meet all of these conditions at once:

• No staff of their own. A TRADE has no employees and does not subcontract the work, with narrow exceptions for family care.
• Not mixed in with the client's staff. A TRADE does not work indistinguishably from the client's employees.
• Own equipment. A TRADE has their own infrastructure and materials where these matter to the work.
• Own organisation. A TRADE works by their own organisational criteria, even if the client gives technical guidance.
• Paid for results. A TRADE is paid according to the result of their work and bears its risk.

What changes for the client of a TRADE contractor#

Hiring a TRADE brings specific obligations for the client company. The contract must always be in writing and registered with the relevant public office (Article 12 of Law 20/2007), and the contractor states in it that they are economically dependent. A TRADE is entitled to a yearly break of 18 working days (Article 14). If the client terminates the contract without justified cause, the TRADE is entitled to compensation for damages (Article 15.3).

Contractor vs TRADE vs employee in Spain: comparison (2026)#

The table compares the four ways to work with an engineer in Spain on the same attributes. The contractor route is the fastest to start; employment, directly or through an EOR, fits a stable role inside the team.

Attribute	Contractor (autónomo)	TRADE contractor	Employee of your Spanish entity	Employee through an EOR
Who the employer is	No one: services contract	No one: registered services contract	Your Spanish entity	The EOR provider
Cost to the company	The contractor's invoice	The TRADE's invoice	Salary plus employer contributions	Salary, employer contributions and the EOR fee
Who pays Social Security	The contractor	The TRADE	The company and the employee	The EOR and the employee
Who sets the schedule	The contractor	The TRADE, within the agreed maximum hours	The company	The company, with the EOR as formal employer
Exclusivity	No	No, though at least 75% of their income comes from you	Whatever the employment contract agrees	Whatever the employment contract agrees
How it ends	Under the services contract	Under the causes in Article 15 of Law 20/2007	Under the Workers' Statute termination rules	Under the Workers' Statute rules, through the EOR
Best for	Projects and independent seniors	One stable main client with project work	Stable teams in Spain	Permanent roles with no entity in Spain

When a contractor relationship becomes employment in Spain#

A contractor relationship in Spain becomes employment when, in practice, the professional works inside the client's organisation and under its direction, which is what Article 1.1 of the Workers' Statute defines. What counts is the overall pattern of day-to-day signs, not any single one.

These are the signs that move a contractor relationship towards employment:

• Hours set by the client. The engineer has working hours and a schedule decided by the company, not just overlap windows.
• Exclusivity. The contract or the practice stops the engineer working for other clients.
• Full integration into the organisation. The engineer has an internal job title, reports to a manager like the rest of the staff or manages people.
• Client's equipment. The engineer works with the company's hardware, materials and tools beyond the technical access the engagement needs.
• One client for a long time. The engineer works for years only for the same company, with a fixed payment that does not depend on results.

When an intermediary without a temporary work agency licence places a person at another company's disposal, the issue is no longer false self-employment but illegal transfer of workers, covered in Kulturo's guide to EOR vs ETT in Spain.

What happens if a contractor is reclassified as an employee in Spain#

If Spain's Labour Inspectorate or a court finds that a contractor was really an employee, the company has to register the person with Social Security and pay the contributions for that period. Failing to register a worker is a serious infringement under Article 22.2 of Spain's law on social order offences (LISOS), counted as one infringement per affected worker.

The fine for that infringement ranges from €3,750 to €12,000 per worker, under Article 40.1.e) of the LISOS. Unpaid contributions also carry a surcharge: under Article 30 of Spain's General Social Security Law, when the company did not file the contribution returns on time, the surcharge is 20% of the debt if paid before the deadline in the claim or assessment ends, and 35% if paid after.

How to fix it: restructure the engagement or move to payroll through an EOR#

A contractor relationship that has drifted towards employment can be fixed in two ways. The first is to restructure the engagement so it is independent again: defined deliverables, the contractor's own schedule, no exclusivity and no place in the org chart. It works when the work really is a project.

The second is to hire the person as an employee. A company with no entity in Spain can do this through an employer of record, which is the formal employer in Spain and runs payroll, contributions and the contract. The choice between an EOR, your own entity and a contractor is covered in Kulturo's guide to hiring in Spain without an entity, and the cost of an EOR in the comparison of employer of record prices in Spain.

Kulturo runs the search for the engineer and, when the client has no Spanish entity, employs the person through its EOR partner Deel. Kulturo is not the formal employer in that case, Deel is, and it does not give tax advice: the tax and employment review of each case belongs with an adviser.