How the DGT's position has evolved
Current position
The tax treatment of a single-price transaction depends on the determination of the main and ancillary services. If the additional elements do not constitute an end in themselves for the customer, they are considered ancillary and follow the rate of the main service. If the elements are not ancillary, the tax base of each good must be broken down in proportion to its market value.
The DGT maintains a constant position based on the distinction between main and ancillary services to determine the tax rate. The doctrine has focused on evaluating whether an element constitutes an end in itself for the customer or if it is a complement to the main activity. No change in criterion is observed, but rather a systematic application of the rule of ancillary services across different sectors.
Turning points
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Establishes that if an element does not perfect or complete the content of the main service, it is not ancillary. In this case, it requires determining the tax base of each good in proportion to its market value.
Analysis based on 13 of 14 rulings with a stated position. Updated 26 September 2026.