The reliability of the results derived from the residual 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 as described in paragraph (c)(2)(ii)(C)(1) of this section;
(2) Accounting consistency as described in paragraph (c)(2)(ii)(C)(2) of this section;
(3) The reliability of the data used and the assumptions made in valuing the intangible property contributed by the participants. In particular, if capitalized costs of development are used to estimate the value of intangible property, the reliability of the results is reduced relative to the reliability of other methods that do not require such an estimate, for the following reasons. First, in any given case, the costs of developing the intangible may not be related to its market value. Second, the calculation of the capitalized costs of development may require the allocation of indirect costs between the relevant business activity and the controlled taxpayer’s other activities, which may affect the reliability of the analysis. Finally, the calculation of costs may require assumptions regarding the useful life of the intangible property.