Summary
This article proposes a reinterpretation of the arm’s length principle in transfer pricing, grounded in the economic efficiency of contractual structures. Traditionally, only transactions with observable market comparables are considered to meet arm’s length conditions. However, the argument here is that if a contractual structure can be demonstrated to be more efficient than alternatives, it should be presumed to represent the rational choice of independent parties—even in the absence of third-party equivalents. This allows for a more economically consistent application of the arm’s length principle without compromising its legal foundation.
Introduction
The arm’s length principle (ALP) is the cornerstone of the international transfer pricing regime. Its core aim is to replicate the conditions that unrelated parties would have agreed upon in a comparable transaction. However, its current implementation—especially through the search for observable third-party contracts—imposes an empirical limitation that may conflict with the economic objectives the principle is meant to serve.
This article advances an alternative perspective: if a contractual structure can be shown to be theoretically more efficient than those observed in the market, it should be accepted as arm’s length, even without exact comparables. This position is based on a functional reading of the arm’s length principle, rooted in market rationality.
Arm’s Length as a Rational Choice Criterion
The arm’s length principle can be interpreted as a rational choice criterion under competitive conditions. Independent parties generally aim to maximize expected utility, adopting contractual structures that yield better joint or individual outcomes. In this context, if structure A proves to be more efficient than structure B—based on costs, risks, or functions—then A should be seen as the rational choice that unrelated parties would have made.
The absence of type A contracts in the market does not imply that they are uneconomical or artificial; it may reflect informational gaps, market barriers, or specific conditions. If a related party can identify and execute a more efficient structure, this should not be viewed as manipulation, but rather as a superior use of information and capabilities.
3. Efficiency as the Basis for Arm’s Length Judgement
In transfer pricing practice, comparability is often limited to observable elements: contracts, prices, and functions. However, under an efficiency-based lens, the analysis shifts—one no longer asks just what others have done, but what they would have done under ideal conditions of information and rationality.
In this framework, contractual efficiency serves as a validation criterion: if a structure reduces costs, better allocates risks, or aligns incentives, it is reasonable to assume that independent parties in a competitive market would have chosen it.
Structure vs. Price: Methodological Implications
Accepting a contractual structure as arm’s length based on its efficiency does not automatically mean the agreed-upon price is also at arm’s length. The lack of comparables for type A contracts means that the Comparable Uncontrolled Price (CUP) method is not directly applicable. Nonetheless, the arm’s length principle remains valid: alternative methods—such as Cost Plus, Transactional Net Margin Method (TNMM), or Profit Split—can be used to assess whether the resulting price aligns with what independent parties would have agreed upon.
This leads to a key conclusion: the validity of a contractual structure can be determined by theoretical efficiency, while the validity of the price must be evaluated through functional and economic analysis, even if indirect methods are required.
Conclusions
This article offers an economic interpretation of the arm’s length principle that elevates contractual efficiency as a criterion of validity. If a structure can be shown to be more efficient than alternatives, it should be presumed to reflect what rational, independent parties would choose—even if no observable precedents exist. This approach allows for a separation between structural analysis and valuation, maintaining both economic and legal consistency within the arm’s length framework.
This perspective is particularly valuable in contexts where contractual innovation or functional differences make finding exact comparables difficult. In such cases, empirical evidence should not be the sole condition for validity; rather, a rational justification based on efficiency should suffice.
References
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• Hart, O., & Holmström, B. (1987). The Theory of Contracts. In: Bewley, T. F. (ed.), Advances in Economic Theory: Fifth World Congress.
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