TPG2022 Chapter VI paragraph 6.160

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Because of the importance of the underlying assumptions and valuation parameters, taxpayers and tax administrations making use of valuation techniques in determining arm’s length prices for transferred intangibles should explicitly set out each of the relevant assumptions made in creating the valuation model, should describe the basis for selecting valuation parameters, and should be prepared to defend the reasonableness of such assumptions and valuation parameters. Moreover, it is a good practice for taxpayers relying on valuation techniques to present as part of their transfer pricing documentation some sensitivity analysis reflecting the consequential change in estimated intangible value produced by the model when alternative assumptions and parameters are adopted.

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