§ 1.482-1(f)(2)(iii)(B) Circumstances warranting consideration of multiple year data.

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The extent to which it is appropriate to consider multiple year data depends on the method being applied and the issue being addressed. Circumstances that may warrant consideration of data from multiple years include the extent to which complete and accurate data are available for the taxable year under review, the effect of business cycles in the controlled taxpayer’s industry, or the effects of life cycles of the product or intangible property being examined. Data from one or more years before or after the taxable year under review must ordinarily be considered for purposes of applying the provisions of paragraph (d)(3)(iii) of this section (risk), paragraph (d)(4)(i) of this section (market share strategy), § 1.482-4(f)(2) (periodic adjustments), § 1.482-5 (comparable profits method), § 1.482-9(f) (comparable profits method for services), and § 1.482-9(i) (contingent-payment contractual terms for services). On the other hand, multiple year data ordinarily will not be considered for purposes of applying the comparable uncontrolled price method of § 1.482-3(b) or the comparable uncontrolled services price method of § 1.482-9(c) (except to the extent that risk or market share strategy issues are present).

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