How the DGT's position has evolved
Current position
The calculation of the magnitudes that exclude the objective estimation method is carried out per activity of the taxpayer themselves. However, if identical or similar activities occur with common management and shared use of personal or material resources, the magnitudes must be calculated jointly. This rule of joint calculation applies both between activities of the same taxpayer and between the individual activity of a partner and the activity of an entity.
The DGT's position remains stable at its core, focused on the individuality of activities. The evolution shows a progressive application of the joint calculation rule for similar activities with common management and shared resources, extending this criterion from the calculation between the taxpayer's own activities to the relationship between partners and entities.
Turning points
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Establishes the basis of the criterion: the calculation is per activity, unless there are similar activities with common management and shared resources.
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Extends the application of the joint calculation to the relationship between the individual activity of a partner and the activity of an entity, provided that similarity, common management, and shared resources coexist.
Analysis based on 38 of 38 rulings with a stated position. Updated 23 September 2026.