Freelance Contracts in Spain 2026: The 10 Essential Clauses You Must Include

Working as a freelancer in Spain has many advantages: flexibility, autonomy, and the ability to choose your projects. But it also carries risks that many new professionals ignore until it is too late.

According to data from the Debt Payment Platform, 45% of Spanish freelancers have experienced non-payment problems at some point in their career. The difference between losing money and protecting yourself lies in a single document: your contract.

In this guide, I explain the 10 essential clauses that every freelance contract must include to secure your professional activity in 2026.

Why Is a Freelance Contract So Important?

A contract is not just worthless paper. It is your first line of defense against:

• Non-payment: Without a contract, claiming money is almost impossible
• Scope creep: Without clear definitions, the project can grow infinitely without additional compensation
• Intellectual property disputes: Without a specific clause, the law protects the author by default
• Jurisdictional conflicts: Without a prior agreement, the courts may not be the most convenient for you

Law 20/2007 of the Statute of Self-Employed Workers establishes the legal framework, but it is the contract that defines the specific conditions of each professional relationship.

The 10 Essential Clauses

1. Complete Identification of the Parties

Your contract must include the complete tax data of both parties:

FREELANCER (Service Provider):

• Full name
• Tax ID (NIF/CIF)
• Fiscal address
• Self-employed number (RETA)
• Contact details

CLIENT (Contracting Party):

• Company name
• Tax ID (CIF)
• Fiscal address
• Authorized contact person

Why does it matter? This information is essential for any subsequent legal claim.

2. Object of the Contract and Project Scope

This is perhaps the most important clause. Define exactly what you are going to deliver:

Object: The freelancer undertakes to [specific description of the service].

Scope included:

• Logo design (3 proposals)
• Basic brand manual (5 pages)
• PNG and SVG versions

Scope NOT included:

• Web page creation
• Social media management
• Printed materials

Professional tip: The more specific, the better. Avoid generic phrases like "everything related to the project."

3. Deadlines and Partial Deliveries

Define specific dates and acceptance criteria:

Milestone	Deadline	Acceptance criterion
Briefing completed	Day 5	Document signed by both parties
Initial proposal	Day 15	Presentation with 3 concepts
Final design	Day 30	Written approval from client
File delivery	Day 35	Files in agreed formats

Important: Include what happens if the client does not respond within the review period (e.g., "it is understood as approved after 5 business days without response").

4. Financial Conditions and Payment Method

This clause must cover all financial aspects:

Fees: [amount] € + VAT

Payment structure:

• Advance: 30% upon contract signing
• Second payment: 40% at 50% of the project
• Final payment: 30% upon delivery

Payment deadline: 30 calendar days from invoice
Late payment interest: 1.5% per month
Payment method: Bank transfer to indicated account

Key fact: In Spain, legal late payment interest for commercial operations is 8% above EURIBOR, but you can agree on a higher percentage.

5. Intellectual Property and Usage Rights

One of the most conflicting points. Decide clearly:

Option A - Full assignment:

The freelancer assigns to the client all intellectual property rights over the deliverables for the maximum legal duration, without territorial restrictions.

Option B - Usage license:

The freelancer grants the client a non-exclusive, non-transferable usage license for commercial use. The freelancer retains ownership and may use the work in their portfolio.

Option C - Progressive assignment:

Rights pass to the client once the final payment is completed. Until then, the freelancer retains all rights.

According to Spanish Intellectual Property Law, if there is no express agreement, moral rights are non-waivable and the author retains the paternity of the work.

6. Confidentiality Clause

Protect sensitive information of both parties:

Both parties commit to maintain strict confidentiality regarding:

• Client financial information
• Business strategies
• Client customer data
• Freelancer own methodologies

This obligation will remain in force for [2-5] years after termination of the contract.

7. Termination and Early Rescission

Define how the relationship can end:

Causes of termination:

• Fulfillment of the contract object
• Mutual agreement in writing
• Serious breach by either party (with 15 days to remedy)

Minimum notice: 15 calendar days

Kill Fee: If the client cancels the project after work has begun, they must pay 100% of the work done plus 20% for cancellation.

8. Scope Modifications (Change Requests)

"Small changes" are every freelancer nightmare. Create a formal mechanism:

Procedure for modifications:

1. Client requests change in writing
2. Freelancer evaluates impact on time and cost
3. Additional budget is issued
4. Client accepts in writing before execution

9. Liability and Limitations

Freelancer liability: Limited to the total amount of the contract.

Client liability: Provide materials, information, and feedback within agreed deadlines. Client delays are not the freelancer responsibility.

10. Jurisdiction and Applicable Law

Applicable law: Spanish legislation

Jurisdiction: The Courts and Tribunals of [freelancer city] expressly waiving any other jurisdiction that may correspond to them.

Prior resolution mechanism: Before litigating, both parties commit to attempting amicable mediation (15 days).

Common Mistakes You Should Avoid

❌ Not including review deadlines

If you do not define how long the client has to approve, you can get trapped in infinite change cycles.

❌ Forgetting VAT

In Spain, freelancers must add VAT (21%) to their invoices. If the client is European, the reverse charge operation may apply depending on the service.

❌ Not agreeing on late payment interest

Without this clause, legal interest can be very low and non-deterrent.

❌ Mixing labor relationship with freelance

The Labor Inspection particularly monitors relationships that appear to be employment ("false self-employed"). Make sure your contract reflects real autonomy.

Frequently Asked Questions about Freelance Contracts

Is a written contract mandatory?

Legally, many contracts can be verbal, but it is never recommended. A verbal contract is practically impossible to prove in case of dispute.

Can I use a contract in another language if I work with international clients?

Yes, but make sure it specifies that the applicable law is Spanish and that it is in a language both parties perfectly understand.

How long should a freelance contract last?

Duration depends on the project. It can be from a single project to a framework contract with annual durations.

What do I do if a client refuses to sign a contract?

If the client does not want to sign a contract, you have two options:

1. Do not work without a contract: Your protection is worth more than that client
2. Send terms and conditions by email: The fact that they do not respond can be considered tacit acceptance

Conclusion: Your Contract Is Your Best Investment

A good contract not only protects you, but also projects you as a serious professional. Clients who respect contracts are the ones who value your work.

Remember:

• Define everything in writing, without exceptions
• Be specific in scope to avoid "additional work"
• Always include late payment interest and kill fees
• Intellectual property is negotiated, not assumed

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