Rule 31 - Residual method for determination of value of supply of goods or services or both

Residual valuation method applies when valuation rules fail; supplier may elect it for services under valuation principles

Where the value of a supply of goods or services cannot be determined under the preceding valuation rules, the value shall be fixed by applying reasonable methods consistent with the valuation principles and general provisions of the relevant chapter; for services, the supplier may elect to apply this residual method instead of the specific alternative rule. The chosen approach must align with the statutory valuation principles and be applied where other prescribed methods are inapplicable.