Like the methods described in §§ 1.482-3, 1.482-4, 1.482-5, and 1.482-9, the comparable profit split relies exclusively on external market benchmarks. As indicated in § 1.482-1(c)(2)(i), as the degree of comparability between the controlled and uncontrolled transactions increases, the relative weight accorded the analysis under this method will increase. In addition, the reliability of the analysis under this method may be enhanced by the fact that all parties to the controlled transaction are evaluated under the comparable profit split. However, the reliability of the results of an analysis based on information from all parties to a transaction is affected by the reliability of the data and the assumptions pertaining to each party to the controlled transaction. Thus, if the data and assumptions are significantly more reliable with respect to one of the parties than with respect to the others, a different method, focusing solely on the results of that party, may yield more reliable results ...

The reliability of the results derived from the comparable profit split is affected by the quality of the data and assumptions used to apply this method. In particular, the following factors must be considered – (1) The reliability of the allocation of costs, income, and assets between the relevant business activity and the participants’ other activities will affect the accuracy of the determination of combined operating profit and its allocation among the participants. If it is not possible to allocate costs, income, and assets directly based on factual relationships, a reasonable allocation formula may be used. To the extent direct allocations are not made, the reliability of the results derived from the application of this method is reduced relative to the results of a method that requires fewer allocations of costs, income, and assets. Similarly, the reliability of the results derived from the application of this method is affected by the extent to which it is possible to apply the method to the parties’ financial data that is related solely to the controlled transactions. For example, if the relevant business activity is the assembly of components purchased from both controlled and uncontrolled suppliers, it may not be possible to apply the method solely to financial data related to the controlled transactions. In such a case, the reliability of the results derived from the application of this method will be reduced. (2) The degree of consistency between the controlled and uncontrolled taxpayers in accounting practices that materially affect the items that determine the amount and allocation of operating profit affects the reliability of the result. Thus, for example, if differences in inventory and other cost accounting practices would materially affect operating profit, the ability to make reliable adjustments for such differences would affect the reliability of the results. Further, accounting consistency among the participants in the controlled transaction is required to ensure that the items determining the amount and allocation of operating profit are measured on a consistent basis ...

However, except in circumstances where the total activities of each of the parties are the subject of the profit split, the financial data will need to be segregated and allocations made in accordance with the accurately delineated transaction(s) so that the profits relating to the combined contributions made by the parties are identified. For example, a product supplier in a profit split with an associated enterprise engaged in European marketing and distribution would need to identify the profits arising from its production of goods for the European market, and exclude the profits arising from the production of goods for other markets. The exercise may be relatively simple if the same goods are supplied to all markets, but will be more complex if different goods with different production costs or with different embedded technology, for example, are supplied to different markets. Similarly, if the associated enterprise engaged in European marketing and distribution buys products from other sources, it will need to segregate its financial data in a way that reflects the revenues, costs, and profits relating to the goods purchased from the associated product supplier in the profit split. Experience suggests that this initial stage in performing a profit split can in some circumstances be extremely complex, and the method of identifying the profits relevant to the transaction and any assumptions made in doing so need to be documented ...

Financial accounting may provide the starting point for determining the profit to be split in the absence of harmonised tax accounting standards. The use of other financial data (e.g. cost accounting) should be permitted where such accounts exist, are reliable, auditable and sufficiently transactional. In this context, product-line income statements or divisional accounts may prove to be the most useful accounting records ...

Where the relevant profits to be split are comprised of profits of two or more associated enterprises, the relevant financial data of the parties to the transaction to which a transactional profit split is applied need to be put on a common basis as to accounting practice and currency, and then combined. Because accounting standards can have significant effects on the determination of the profits to be split, accounting standards should, in cases where the taxpayer chooses to use the transactional profit split method, be selected in advance of applying the method and applied consistently over the lifetime of the arrangement. Differences in accounting standards may affect the timing of revenue recognition as well as the treatment of expenses in arriving at profits. Material differences between the accounting standards used by the parties should be identified and aligned ...

However, except in circumstances where the total activities of each of the parties are the subject of the profit split, the financial data will need to be segregated and allocations made in accordance with the accurately delineated transaction(s) so that the profits relating to the combined contributions made by the parties are identified. For example, a product supplier in a profit split with an associated enterprise engaged in European marketing and distribution would need to identify the profits arising from its production of goods for the European market, and exclude the profits arising from the production of goods for other markets. The exercise may be relatively simple if the same goods are supplied to all markets, but will be more complex if different goods with different production costs or with different embedded technology, for example, are supplied to different markets. Similarly, if the associated enterprise engaged in European marketing and distribution buys products from other sources, it will need to segregate its financial data in a way that reflects the revenues, costs, and profits relating to the goods purchased from the associated product supplier in the profit split. Experience suggests that this initial stage in performing a profit split can in some circumstances be extremely complex, and the method of identifying the profits relevant to the transaction and any assumptions made in doing so need to be documented ...

Financial accounting may provide the starting point for determining the profit to be split in the absence of harmonised tax accounting standards. The use of other financial data (e.g. cost accounting) should be permitted where such accounts exist, are reliable, auditable and sufficiently transactional. In this context, product-line income statements or divisional accounts may prove to be the most useful accounting records ...

Where the relevant profits to be split are comprised of profits of two or more associated enterprises, the relevant financial data of the parties to the transaction to which a transactional profit split is applied need to be put on a common basis as to accounting practice and currency, and then combined. Because accounting standards can have significant effects on the determination of the profits to be split, accounting standards should, in cases where the taxpayer chooses to use the transactional profit split method, be selected in advance of applying the method and applied consistently over the lifetime of the arrangement. Differences in accounting standards may affect the timing of revenue recognition as well as the treatment of expenses in arriving at profits. Material differences between the accounting standards used by the parties should be identified and aligned ...