© 2025 by Michael Firth KC, Gray's Inn Tax Chambers
Contact: michael.firth@taxbar.com

F8a. Transfer pricing methods
GENERAL
- No rigid hierarchy: select the method that provides the best estimate of an arm's length price
"[170] Several acceptable transfer pricing methods exist, providing a conceptual framework for the determination of the arm's length price. No single method is considered suitable in every situation and the taxpayer must select the method that provides the best estimate of an arm's length price for the transaction in question. All of these transfer pricing methods rely, directly or indirectly, on the comparable profit, price or margin information of similar transactions. This information may be an "internal comparable" based on similar uncontrolled transactions between the entity and a third-party, or an "external comparable" involving independent enterprises in the same market or industry.
[171] The OECD Guidelines explain that no rigid hierarchy is followed in the selection process. Instead, the method most appropriate to the facts, which provides the highest level of comparability and is capable of practical application, should be selected. Emphasis is, therefore, placed on the quality of the comparables and the reliability of the comparisons." (Lifeplus Europe Ltd v. HMRC [2026] UKFTT 797 (TC), Judge Manyarara)
- Traditional methods v. transactional profit methods
"[172] Two classes of transactional profit methods are recognised by the OECD Guidelines. The following three are commonly referred to as "Traditional Methods".
(1) The "CUP method" compares the price charged for goods or services in a related party transaction to that charged in a comparable third-party transaction in comparable circumstances (i.e., market price). This method uses property or service transactions between unrelated parties to determine arm's length consideration for similar transfers between related parties. This method evaluates whether the amount charged in a controlled transaction is arm's length, by reference to the amount charged in a comparable uncontrolled transaction. The CUP method was relied on by HMRC;
(2) The Resale Price method ("the RPM") (also referred to as 'resale minus') is used in sales and distribution transactions. This method is used to determine the arm's length consideration to be earned by the purchaser in an intercompany transaction when it resells to unrelated parties. This method evaluates whether the amount charged in a controlled transaction is 'arm's length' by reference to the gross profit margin realised in comparable uncontrolled transactions. The RPM measures the value of the function performed and is ordinarily used in cases where the reseller has not added any significant value to the product by physically altering it before resale; and
(3) The "Cost Plus method" (or "the CPM") determines the arm's length consideration that the seller should earn in an intercompany sale, based on the gross profit mark-up earned by sellers in comparable uncontrolled transactions. The appropriate mark-up is derived by referencing gross profit margins earned by comparable companies, operating under comparable circumstances, in uncontrolled transactions.
[173] The Traditional Methods rely on actual transactions, and compare the terms and conditions in the related party transactions with those of third parties in comparable transactions.
[174] The following two are commonly referred to as "Transactional Profit Methods":
(1) The "Profit-Split method" (or "the PSM") determines arm's length transfer pricing on the basis of the relative value of each controlled taxpayer's contribution to the combined profit or loss in a particular controlled transaction, or set of controlled transactions. These contributions should correspond to the division of profit or loss that would result from an arrangement between uncontrolled taxpayers, each performing functions similar to those of the various controlled taxpayers engaged in the relevant business activity. The OECD Guidelines identify two approaches in applying the PSM: the 'residual analysis' and the 'contribution analysis'. Under the residual profit-split analysis, profit is first allocated to each of the related entities, in accordance with their routine functions, services and intangibles. The residual profit not accounted for by the routine contributions is then allocated to each entity based on each of the related parties' contributions of non-routine intangible property. Under the contribution analysis, uncontrolled taxpayers' proportions of the combined operating profit, or loss, in situations similar to the controlled transaction are used to allocate the related parties' combined operating profit or loss; and
(2) The TNMM determines arm's length transfer pricing by reference to a measure of net profitability of unrelated companies that engage in similar activities, under similar circumstances. The method measures the total return derived from the controlled taxpayer's most narrowly defined business activity, for which reliable data incorporating the controlled transactions under review are available. The TNMM examines the net profit relative to an appropriate base (e.g., costs, sales, assets) that a taxpayer realises from a controlled transaction. Thus, the TNMM operates in a manner similar to the CPM and the RPM. The TNMM method is that which was utilised by the Appellant (a 'one-sided' method).
[175] The Transactional Profit Methods rely on the profit levels to determine arm's length prices, measuring the net operating profits of related party transactions, and comparing this to that of independent companies engaged in similar comparable transactions.
[176] In addition to the five methods referred to above, the UN Manual includes a sixth method, or "Commodity Rule". This is similar to the CUP method, is used for commodities transactions and relies on the commodities market to price commodity transactions between related parties." (Lifeplus Europe Ltd v. HMRC [2026] UKFTT 797 (TC), Judge Manyarara)
- Degree of comparability + quality of data and assumptions
"[177] In determining which method provides the most reliable measure of an arm's length result, two factors are particularly important:
(1) First, the degree of comparability between the controlled transaction and the uncontrolled comparables influences the reliability of each method; and
(2) Second, the quality of the data and assumptions used in the analysis will influence the reliability of the method." (Lifeplus Europe Ltd v. HMRC [2026] UKFTT 797 (TC), Judge Manyarara)
SELECTING THE METHOD
Transactions which independent enterprises would not undertake
- Mere fact that transaction not found between independent parties does not mean it is not arm's length
"[1.11]...Where independent enterprises seldom undertake transactions of the type entered into by associated enterprises, the arm’s length principle is difficult to apply because there is little or no direct evidence of what conditions would have been established by independent enterprises. The mere fact that a transaction may not be found between independent parties does not of itself mean that it is not arm’s length." (OECD TP Guidance)
Intangible assets
- Outsourcing important functions: comparable may not be identifiable, profit split may be appropriate
"[6.57] Because it may be difficult to find comparable transactions involving the outsourcing of such important functions, it may be necessary to utilise transfer pricing methods not directly based on comparables, including transactional profit split methods and ex ante valuation techniques, to appropriately reward the performance of those important functions. Where the legal owner outsources most or all of such important functions to other group members, attribution to the legal owner of any material portion of the return derived from the exploitation of the intangibles after compensating other group members for their functions should be carefully considered taking into account the functions it actually performs, the assets it actually uses and the risks it actually assumes under the guidance in Section D.1.2 of Chapter I. Examples 16 and 17 in Annex I to Chapter VI illustrate the principles contained in this paragraph." (OECD TP Guidance)
Profit split
- Both parties make unique and valuable contributions (e.g. unique intangibles)
"[6.209] In some circumstances where reliable uncontrolled transactions cannot be identified, transactional profit split methods may be utilised to determine an arm’s length allocation of profits for the sale of goods or the provision of services involving the use of intangibles. One circumstance in which the use of transactional profit split methods may be appropriate is where both parties to the transaction make unique and valuable contributions to the transaction." (OECD TP Guidance)
- Careful to identify allegedly unique intangibles
"[6.211] In applying a profit split method in a case involving the use of intangibles, care should be taken to identify the intangibles in question, to evaluate the manner in which those intangibles contribute to the creation of value, and to evaluate other income producing functions performed, risks assumed and assets used. Vague assertions of the existence and use of unspecified intangibles will not support a reliable application of a profit split method." (OECD TP Guidance)
- Appropriate to situations where independent parties would price the transaction in proportion to their contributions
"[2.119] The main strength of the transactional profit split method is that it can offer a solution for cases where both parties to a transaction make unique and valuable contributions (e.g. contribute unique and valuable intangibles) to the transaction. In such a case independent parties might effectively price the transaction in proportion to their respective contributions, making a two-sided method more appropriate." (OECD TP Guidance)
- Highly integrated operations
"[2.120] The transactional profit split method can also provide a solution for highly integrated operations in cases for which a one-sided method would not be appropriate. See Section C.2.2.2, below." (OECD TP Guidance)
TESTED PARTY IDENTIFICATION
General rule
- The party providing the function with the most reliable comparables (usually the party with less complex functions)
"[3.18]...As a general rule, the tested party is the one to which a transfer pricing method can be applied in the most reliable manner and for which the most reliable comparables can be found, i.e. it will most often be the one that has the less complex functional analysis." (OECD TP Guidance)
- Reliability substantially reduced if tested party performs significant portions of important functions re intangibles
"[6.58]...In particular, the reliability of a one-sided transfer pricing method will be substantially reduced if the party or parties performing significant portions of the important functions are treated as the tested party or parties. See Example 6." (OECD TP Guidance)
Manufacture of goods
- Company making + selling goods to connected party uses its own unique/valuable intangibles: test purchaser's distribution service
"[3.19] ...Assume now that A is also manufacturing P2 products for which it owns and uses valuable unique intangibles such as valuable patents and trademarks, and for which B acts as a distributor. Assume that in this P2 transaction, B only performs simple functions and does not make any valuable, unique contribution in relation to the transaction. The tested party for the P2 transaction would most often be B." (OECD TP Guidance)
- Company making + selling goods to connected party using purchaser's unique intangibles: test vendor's manufacturing service
"[3.18]...Assume that A is found to manufacture P1 products using valuable, unique intangibles that belong to B and following technical specifications set by B. Assume that in this P1 transaction, A only performs simple functions and does not make any valuable, unique contribution in relation to the transaction. The tested party for this P1 transaction would most often be A..." (OECD TP Guidance)
SELECTING THE FINANCIAL INDICATOR TO BE COMPARED
APPLYING THE METHOD
- Comparability adjustments where differences between situations being compared
"[1.40]...Where there are differences between the situations being compared that could materially affect the comparison, comparability adjustments must be made, where possible, to improve the reliability of the comparison. Therefore, in no event can unadjusted industry average returns themselves establish arm’s length prices." (OECD TP Guidance)
- Example: logistics company that cannot consolidate locations/reduce excess capacity in order to reduce risk of disruption
"[1.52] ...For example, an associated enterprise provides logistics services to the group. The logistics company is required to operate warehouses with spare capacity and in several locations in order to be able to cope in the event that supply is disrupted at any one location. The option of greater efficiency through consolidation of locations and reduction in excess capacity is not available. Its functions and assets may, therefore, be different to those of an independent logistics company if that independent service provider did not offer the same capabilities to reduce the risk of disruption to supply." (OECD TP Guidance)