Glossary/Tax Concepts/Arm's Length Principle
Tax Concepts

Arm's Length Principle

ALP

Arm's Length Principle is the international standard requiring related-party transactions to be priced as if they occurred between independent, unrelated parties.

What ALP is

The Arm's Length Principle (ALP) is the cornerstone of international transfer pricing. Article 9 of the OECD Model Tax Convention states that profits in transactions between associated enterprises must reflect those that would have been made between independent parties under comparable conditions. Almost every transfer-pricing regime in the world rests on this single principle.

How it is applied

Applying ALP starts with a functional analysis: which entity performs which functions, owns which assets, and bears which risks? The next step is to select the most appropriate transfer-pricing method (CUP, resale price, cost plus, TNMM, or profit split) and benchmark the controlled transaction against external comparables drawn from databases like Orbis, Bloomberg BNA, or RoyaltyStat.

The result is an arm's length range, often expressed as the interquartile range of the comparable margins.

Limitations

ALP is increasingly criticised for being hard to apply to digital businesses, intangibles, and global value chains. Pillar Two and the OECD's Pillar One Amount A proposals are partial responses, but ALP remains the operational rule for the vast majority of intra-group transactions.

When you will meet ALP

You will rely on the arm's length principle every time you set or defend an intra-group price - management fees, royalties, intra-group services, financing, and tangible goods. It also drives audit defence, advance pricing agreements (APAs), and the design of any IP migration or principal-structure model.

Where this comes up in our guides

Arm's Length Principle FAQ

It is enacted into domestic law in most countries, usually by reference to the OECD Transfer Pricing Guidelines, and into bilateral tax treaties through the OECD or UN model conventions.
At a glance
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Tax Concepts
Also written
ALP
Confirm current figures with the official registry or a qualified adviser before relying on them.
Related terms
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Sources
  1. 1OECD Model Tax Convention - Article 9
  2. 2OECD Transfer Pricing Guidelines - Chapter I
Definition reviewed March 2026.
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