TPguidelines

Prices are likely to be affected by differences in products, and gross margins are likely to be affected by differences in functions, but net profit indicators are less adversely affected by such differences. As with the resale price and cost plus methods that the transactional net margin method resembles, this does not mean that a mere similarity of functions between two enterprises will necessarily lead to reliable comparisons. Assuming similar functions can be isolated from among the wide range of functions that enterprises may exercise, in order to apply the method, the net profit indicators related to such functions may still not be automatically comparable where, for instance, the enterprises concerned carry on those functions in different economic sectors or markets with different levels of profitability. When the comparable uncontrolled transactions being used are those of an independent enterprise, a high degree of similarity is required in a number of aspects of the associated enterprise and the independent enterprise involved in the transactions in order for the controlled transactions to be comparable; there are various factors other than products and functions that can significantly influence net profit indicators.