International tax advisory that protects your company’s assets
Friday, March 6, 2026
Communications team
When business activity crosses borders, tax management ceases to be a routine procedure and becomes a strategic and financial priority. The way taxation is structured affects net profit, future stability, and the overall viability of the organization. Having specialized international tax advisory is key to minimizing risks, optimizing the tax burden, and protecting corporate assets.
In Spain, the treatment of cross-border income depends directly on corporate residence and non-resident taxation. This framework determines which profits are taxable, which transactions are considered related-party, and which must be exempt. Without proper planning, the process can lead to contingencies, audits, and million-euro adjustments.
Before undertaking any international operation, it is essential to understand how treaties work, which profits may be disputed, and how to structure regulatory compliance to protect the company’s financial interests.
The Role of Corporate Tax Residence
The starting point for understanding how income is taxed in a multinational environment is corporate tax residence, which determines which jurisdiction has the right to impose taxation.
In international practice, the two most common operational scenarios are:
1. Subsidiaries and permanent establishments
This is the most common scenario in much of corporate expansion. As a general rule, income generated in the host territory is considered taxable, including: direct commercial income, operational real estate, local bank accounts, and branch investments.
However, the following are exempt or subject to more favorable treatment:
- Repatriated dividends that qualify for exemption under the law (provided the legal requirements for minimum ownership and holding period are met, as required by the LIS in Spain for the 95% exemption).
- Royalties and license fees documented at strict arm’s length value.
- Intangible assets exploited centrally from the parent company.
The real tax challenge arises with related-party transactions, such as technical services provided by the parent company to its subsidiary, where there are doubts about proper market valuation.
2. Provision of corporate services without a permanent establishment
In this model, the company maintains billing from its country of origin without creating a permanent physical structure. It provides operational agility but does not eliminate risk with foreign tax authorities. It is common for administrations to require withholdings at source for the services provided or claim local taxation for prolonged executive travel.
Therefore, the chosen legal structure completely determines how the international business is taxed. Anticipating the impact allows for structuring a secure operation, avoid double taxation, and protect cash flow.
International Taxation and Global Flows
When the company operates under multiple regulations, the unavoidable need arises to audit and justify all its financial flows. This process becomes significantly more complicated when facing holding structures, transfer pricing, or centralized intangibles.
Which incomes are considered foreign-sourced?
According to the Non-Resident Income Tax Law (TRLIRNR) for operations in Spain, and considering that OECD guidelines serve as a fundamental reference framework for interpreting treaties and transfer pricing, the following are generally considered taxable in the source jurisdiction:
- Business profits obtained through a permanent establishment or fixed place of operations.
- International exploitation of patents, trademarks, dividends, and interest.
- Capital gains from the sale of foreign subsidiaries.
- Technical or management services provided outside the territory.
Related-party transactions that may generate contingencies
Although intragroup transactions are common and necessary in corporate groups, they are often subject to review by the tax authorities when they do not comply with the arm’s length principle (Art. 18 LIS) or are not properly documented. The situations that most frequently generate contingencies include:
- Intragroup financing with interest rates not aligned with market conditions or debt structures that, by their nature, could be reclassified as capital contributions.
- Charges for management fees or intragroup services without properly demonstrating the actual service provided, the benefit to the receiving entity, or the cost allocation method.
- Transfer or assignment of intangibles (software, technology, or know-how) without properly analyzing the development, maintenance, and exploitation functions of the asset within the group.
- Secondment or relocation of executives, which may raise doubts about the company’s place of effective management or even permanent establishment risks.
In these cases, the tax authorities may make market valuation adjustments and off-balance-sheet adjustments in Corporate Tax, with possible additional effects on withholdings, deemed dividends, and penalties if there is no proper transfer pricing policy and documentation.
How to optimize the corporate tax burden
The preventive process consists of three streamlined steps:
Structure analysis
- Identification of cross-border transactions and local reporting obligations.
Price audit
- Determination of market value for services and intangibles, supported by expert reports if necessary.
Application of exemptions
- Documenting and neutralizing the tax burden to avoid inefficiencies.
The tax framework can become exceptionally complex. Therefore, having a specialized international tax advisory, supported by a strong international legal department, is a strategic tool to ensure strict compliance with the law.
International Treaties: Usefulness and Limits
The network of treaties to avoid double taxation is often considered the fast track to protect margins. However, in practice it generates severe contingencies when interpretation is ambiguous or operational substance is lacking.
What does tax legislation require to apply a treaty?
To pass an audit, the essential requirements are:
- Valid tax residence certificate issued by the competent authority.
- Proof of status as the beneficial owner.
- Existence of real economic substance and physical resources at the destination.
- Transactions supported by a demonstrable business rationale.
Most Common Contingency Areas
Even with current international treaties, critical risks arise:
Unexpected withholding taxes at source
Applied by foreign clients when the parent company invoices without valid prior certificates.
Hidden permanent establishments
High risk in tech and consulting firms with technical or executive staff relocated for extended periods.
Double tax residence
When management bodies operate between two countries, blurring the location of the economic center.
Anti-abuse regulations
Claims arising from transparency directives that eliminate competitive advantages if tax avoidance is detected.
International treaties do not eliminate the obligation to align every corporate transaction with global compliance.
Preventive Audit and Risk Map
International growth requires documenting and reporting the entire value chain. Often, reporting obligations are monitored more closely than the tax payment itself. The first step is to prepare a risk map that includes:
- Subsidiaries, branches, and key relocations.
- Royalties, license fees, and liabilities abroad.
- Transfer pricing documentation (Masterfile).
- Mandatory reporting forms, such as the DAC directives or the declaration of assets abroad (Form 720), whose management and penalty framework must be carefully analyzed in light of recent CJEU case law.
To avoid adjustments, the restructuring must ensure corporate substance (real resources in each location), documentary traceability, and accounting standardization.
When critical inefficiencies are detected, management can opt for advance pricing agreements (APA), modify billing flows, or, in extreme cases, reconsider the corporate structure.
Supporting Documentation: Key to Avoiding Audits
The lack of rigorous reports on related-party transactions or the absence of valid tax residence certificates greatly complicates audits, blocks collections, and can result in million-euro assessments due to double taxation that cannot be recovered.
Applicable Sources and Regulatory References
- OECD Model Tax Convention on Income and on Capital.
- Law 27/2014, of November 27, on Corporate Income Tax (LIS).
- Non-Resident Income Tax Law (TRLIRNR).
Corporate Conclusion and Essential Recommendations
Mastering non-resident taxation, correctly applying international treaties, and auditing related-party transactions are essential executive steps. When coordinating a commercial expansion across several countries, having a specialized technical analysis makes the difference between successful internationalization and a costly, exhausting tax dispute.
At GRÀCIACALBET, our more than 45 years of experience show that preventive tax advisory allows CEOs and CFOs to anticipate audits, optimize their structures, and focus on the global growth of their businesses with complete legal certainty.
