For years, many international corporate structures were designed around a straightforward premise: achieving tax efficiencies through entities established in jurisdictions with favorable tax regimes. However, the international regulatory landscape has changed dramatically.
Today, the question tax authorities are asking is no longer limited to where a company is incorporated. Instead, they are focusing on where decisions are made, where value is created, and who actually performs the functions that generate income.
This transformation reflects a broader trend driven by international standards promoted by the OECD and the BEPS Action Plan, which seek to address structures that, while legally valid in form, lack the genuine economic activity necessary to justify the tax benefits they receive.
For businesses, corporate groups, and investors, this development should be viewed as something far more significant than a tax reform or a new compliance requirement. It represents a fundamental shift in how authorities evaluate and validate business structures.
Tax planning can no longer be separated from real operations
One of the most significant changes we are witnessing is the gradual departure from a purely formalistic view of corporate structures.
In the past, the legal existence of a company could be sufficient to access certain tax benefits or favorable tax treatment. Today, that is no longer necessarily the case. Tax authorities are increasingly focused on assessing whether entities have the personnel, resources, management capacity, and operational functions consistent with the income they earn.
Economic substance has become the key element in demonstrating that an entity exists for legitimate business reasons and not merely to obtain tax advantages.
This means that tax planning can no longer be designed independently from business operations. The legal structure, operational structure, and tax structure must be aligned.
When such alignment does not exist, the risk extends beyond a technical discussion with the tax authorities. It may result in tax adjustments, the disregard of transactions or entities, the loss of tax benefits, significant financial exposure, and even reputational damage.
Panama sends a message beyond its borders
A recent example of this trend is Law No. 526 on Economic Substance, recently enacted in Panama. While many may view it as a novel initiative, its underlying principles are consistent with measures that have already been incorporated into other jurisdictions across the region.
The law bears similarities to existing rules in Costa Rica applicable to certain categories of passive income and is based on a principle that is becoming increasingly common in international taxation: the benefits associated with a corporate structure must be supported by genuine economic activity.
Under this law, certain passive income earned by entities belonging to multinational groups may become subject to a 15% tax in Panama if the entity lacks sufficient economic substance in the country. In practical terms, this means demonstrating that the entity has the human and operational resources necessary to perform its functions, either through its own employees or through outsourced services effectively located in Panama.
The types of income covered by this framework include interest, dividends, and other forms of movable capital income, royalties derived from the use or exploitation of intangible assets, as well as certain real estate income generated outside Panama.
As a result, structures that receive income from these activities may be directly affected by the new rules. Nevertheless, the law recognizes that not all entities perform equivalent functions. Pure holding companies and Private Interest Foundations, whose nature is primarily asset-holding or wealth-preservation oriented, are subject to more limited substance requirements, given the lower level of operational activity associated with their purpose.
Another important aspect of the law is the availability of foreign tax credits designed to prevent double taxation. This means that when income has already been taxed in its country of source, the tax paid abroad may be credited against the Panamanian tax liability, subject to the applicable limitations.
In practical terms, if income derived from another jurisdiction has already been subject to a withholding tax equivalent to 15%, no additional tax would be due in Panama on that same income. Conversely, if the foreign tax paid is lower than 15%, only the difference would be payable in Panama, since the foreign tax credit is capped at an amount equivalent to the 15% rate.
These mechanisms are commonly found in tax systems aligned with international standards and reflect an effort to balance revenue collection objectives with the competitiveness of cross-border investment.
Likewise, the law introduces, for the first time in Panama's legal framework, a specific anti-abuse provision that expressly establishes that structures lacking sufficient economic or business justification, and created solely for tax purposes, may be disregarded by Panama’s Ministry of Economy and Finance.
However, the most significant aspect for businesses is not merely the impact of the law within Panama. The broader message is that the region continues to move toward models in which the mere legal existence of an entity is no longer enough. The ability to demonstrate genuine functions, adequate resources, and a legitimate business purpose will increasingly determine the effectiveness and legal certainty of international corporate structures.
Reviewing existing structures has become a strategic necessity
Many organizations continue to operate under structures designed ten or fifteen years ago, based on regulatory assumptions that are substantially different from those that exist today.
The challenge is that a structure that was efficient and fully compliant when originally implemented may no longer satisfy modern economic substance requirements.
Accordingly, the question multinational groups should be asking is whether their current structures could withstand a review based on contemporary economic substance standards and valid business purpose requirements.
The difference between acting proactively and reacting after an audit or challenge may represent significant tax exposure, additional operational costs, and reputational risks that could otherwise be avoided through a timely review.
In today’s environment, economic substance is no longer merely a technical tax concept. It has become a critical component of corporate governance, risk management, and long-term business strategy.
