Statement of Work in Spain: Template, Key Clauses and Local Law (2026)

A statement of work (SOW) in Spain is the document that defines a specific piece of work: the deliverables, the timeline, the acceptance criteria and the price. It usually sits under a master services agreement (MSA), which holds the standing terms, while the SOW captures what changes from project to project. This guide explains what a Spanish SOW should contain, how Spanish law treats it, and the local points that matter. It is general information, not legal advice. Confirm specifics with a Spanish-qualified lawyer. ## What is a statement of work and when do you need one in Spain? An SOW answers the practical questions of a project: what will be delivered, by when, to what standard, for how much, and when it counts as done. It does not usually repeat the legal terms, because those live in the MSA. You need an SOW whenever you: - Run a defined project under an existing MSA or framework contract.

• Want clear acceptance criteria so both sides know when the work is complete.
• Need to tie payment to milestones or deliverables. Without an MSA, an SOW can also work as a short standalone service contract, but then it must carry the legal terms too. ## Which law governs a statement of work in Spain? An SOW is not a separate type of contract under Spanish law; it is read together with its MSA and interpreted under: - The Civil Code. Freedom of contract (Article 1255) and the rules on service and work contracts. Spanish law distinguishes two classic categories that matter here: - The arrendamiento de servicios (a contract for services) is an obligation of means: the provider must act with due skill and diligence, but does not guarantee a specific result. - The contrato de obra (a contract for a work or result) is an obligation of result: the provider must deliver the defined outcome.
• The Commercial Code for dealings between businesses.
• Late payment law. Law 3/2004 governs payment timing and interest for B2B transactions, relevant to milestone payments. Which category an SOW resembles affects how strictly performance is judged and when payment is due, so the way you word deliverables and acceptance matters. ## Key clauses in a Spanish statement of work | Clause | Why it matters in Spain | | --- | --- | | Reference to the MSA | State that the SOW is governed by and incorporates the MSA. | | Scope and deliverables | Define precisely what will be delivered. | | Assumptions and exclusions | Say what is not included, to control scope. | | Timeline and milestones | Dates and dependencies; link to payment if relevant. | | Acceptance criteria | Objective tests and a review period; this is central. | | Price and payment | Fixed price, time and materials, or milestones; VAT; Law 3/2004. | | Change control | How scope changes are agreed and priced. | | Personnel and roles | Key people and the customer's cooperation duties. | | Intellectual property | Confirm ownership of deliverables (usually under the MSA). | | Dependencies | What the customer must provide for the work to proceed. | ### Acceptance is the clause that prevents disputes In a result-based SOW, acceptance is where most arguments start. Set objective acceptance criteria, a defined review window, what happens if the customer does not respond (deemed acceptance), and a cure process for rejected deliverables. Clear acceptance language reduces the risk of a dispute over whether the obligation was one of means or of result. ## Spain-specific points to get right - Means versus result (servicios vs obra). Decide which obligation you intend and draft to match. A fixed-price project with firm deliverables reads as a contract for a result; an ongoing advisory engagement reads as a contract for services. Mismatched wording creates uncertainty about what was promised.
• Worker misclassification (falso autónomo). If the SOW places individuals under the customer's day-to-day direction, with fixed hours and exclusivity, Spanish authorities may treat it as disguised employment. Keep the provider independent and responsible for its own methods and staff.
• Payment timing. Law 3/2004 limits B2B payment periods and grants interest on late payment, which affects milestone schedules.
• VAT. Spanish IVA usually applies. State whether prices include or exclude VAT.
• Precedence. Say whether the MSA or the SOW wins if they conflict; most MSAs make commercial detail in the SOW prevail over general terms. ## A simple SOW template outline for Spain 1. SOW reference and link to the MSA

2. Project overview and objectives
3. Scope and deliverables
4. Assumptions and exclusions
5. Timeline and milestones
6. Acceptance criteria and review period
7. Price, payment schedule and VAT
8. Change control
9. Project roles and governance
10. Customer dependencies and responsibilities
11. Intellectual property (confirming the MSA position)
12. Order of precedence with the MSA
13. Signatures ## Common mistakes to avoid - Putting legal terms in the SOW and duplicating or contradicting the MSA.

• Vague deliverables and no acceptance criteria, so completion is disputed.
• No change control, so every scope change becomes a conflict.
• Ignoring the means-versus-result distinction and over-promising a result.
• Structuring the SOW so individuals look like the customer's employees. ## One workspace to draft, review and track your statements of work An MSA usually spawns many SOWs, and each one has to match the master terms, carry clean acceptance and payment language, and have its milestones and deadlines tracked. Doing that by hand, across many projects and inboxes, is where dates and obligations slip. An AI contract workspace keeps it together: draft each SOW from an approved template tied to its MSA, flag per-clause risk against how your company contracts, edit clauses in plain language, and track milestones, acceptance dates and payments on a live timeline. Adira is built for this, India-first today with other jurisdictions including Spain on the roadmap, so confirm Spanish-law specifics with local counsel. The drafting, review and tracking you would otherwise do by hand can live in one workspace tuned to your business. This article is general information and not legal advice.