Permanent Establishment Risk in Spain: When Remote Workers and Representatives Create Tax Obligations

What Is a Permanent Establishment?

A Permanent Establishment (PE) is the threshold concept that determines when a foreign company's activity in a country becomes taxable in that country. If a foreign company creates a PE in Spain, Spain can tax the profits attributable to that PE under Corporate Income Tax (CIT), and the PE may have VAT registration and withholding tax obligations.

Under Spanish domestic law and most Double Tax Agreements (DTAs) to which Spain is a party (based on the OECD Model), a PE exists in one of two ways:

• Fixed Place of Business PE: The foreign company has a fixed place of business in Spain — an office, branch, factory, building site, or similar — through which it carries on part of its business.
• Dependent Agent PE: The foreign company uses an agent in Spain who habitually concludes contracts on its behalf and is not acting in the ordinary course of their own independent business.

With the dramatic increase in remote working since 2020, PE risk has become one of the most frequently overlooked international tax issues for companies whose employees have relocated to Spain or regularly work from Spain for a foreign employer.

The Remote Work PE Problem

Consider a foreign company ("F") with no offices in Spain. A senior manager of F ("M") works from home in Madrid for F's operations, conducting business development, client calls, and project management for F's international clients. M does not sign contracts on F's behalf — all contracts are concluded by F's central management in the home country.

Does F have a PE in Spain?

The analysis proceeds as follows:

Fixed Place of Business Test

M's home office in Madrid is a "place of business" in Spain that is at the disposal of F. The OECD and the Spanish STA have confirmed that a home office can constitute a fixed place of business for PE purposes if:

• The company has "at its disposal" the premises — this does not require ownership; it is sufficient if the company directs, requires, or expects the employee to work from home;
• The activity is not merely preparatory or auxiliary.

The key question is whether F requires M to work from Spain, or whether M's home working arrangement is purely for personal convenience and M could equally perform the work from F's home country office if so required.

The OECD Commentary on this point (updated post-Covid) acknowledges that home working arrangements typically do not create a PE where the company did not require or mandate the home working, and where the arrangement is not regular and part of an organisational structure.

Dependent Agent Test

Even without a fixed place of business, F may have a PE if M is an agent who "habitually concludes contracts, or habitually plays the principal role leading to the conclusion of contracts that are routinely concluded without material modification by the enterprise." This is the post-BEPS (2017 OECD Model) version of the dependent agent test.

Under this expanded test, M does not need to formally sign contracts. If M habitually plays the principal role in concluding contracts (e.g., by negotiating and agreeing key terms with clients, with head office merely rubber-stamping), a PE may exist.

Consequences of a PE in Spain

If a PE is found to exist, the consequences are significant:

• Spanish CIT: Profits attributable to the PE are subject to Spanish CIT at 25%. Determining the attributable profits requires a transfer pricing analysis — the PE is treated as a separate entity dealing at arm's length with the head office.
• VAT registration: A PE will typically trigger VAT registration obligations in Spain for supplies made or received through the PE.
• Withholding taxes: Payments by Spanish clients directly to the PE may be subject to Spanish withholding.
• Social security and labour law: Having employees in Spain triggers Spanish social security registration obligations, regardless of PE status.
• Retrospective liability: If the PE has existed for some years without being declared, there may be significant retrospective tax exposure once discovered.

Structuring to Manage PE Risk

Companies with employees or representatives in Spain can manage PE risk through appropriate structuring:

• Establish a Spanish subsidiary or branch: Rather than operating through an undeclared PE, formalise the Spanish presence by incorporating a Spanish company (SL) or registering a branch. This provides certainty on tax obligations and often enables more efficient structuring.
• Use a payroll employer-of-record: Some companies use Spanish employer-of-record (EOR) services to employ staff in Spain without creating a corporate presence. This addresses social security but does not eliminate PE risk if the activity is substantive.
• Restrict contract authority: Ensure that employees in Spain do not have authority to conclude or principally negotiate contracts on behalf of the foreign entity. Client-facing roles should be structured so that final contract authority remains with headquarters.
• Activity limitation: Restrict Spanish-based employees to preparatory or auxiliary activities — market research, information gathering, or support functions — which do not rise to the level of a PE.

Post-BEPS Vigilance Required

The BEPS (Base Erosion and Profit Shifting) project significantly tightened PE rules from 2017. The updated OECD Model expands the dependent agent test as described above, and also adds an "anti-fragmentation" rule that prevents companies from artificially splitting activities between multiple locations to keep each below the PE threshold. Companies should reassess their PE exposure under the post-2017 rules, particularly if their initial analysis was done before the BEPS changes were implemented.

For a PE risk assessment and structuring advice, contact internationaltaxlegalspain.com.