How the DGT's position has evolved
Current position
Professional career supplements are earnings from employment that must be attributed to the tax period in which they become due. As these are administrative recognitions, the due date arises with the resolution that recognizes the right. If the generation period exceeds two years and they are attributed to a single tax year, the 30 percent reduction under Article 18.2 of the IRPF (Personal Income Tax) Law applies.
The DGT's position remains constant in classifying these amounts as earnings from employment and their attribution to the year of the administrative resolution. No doctrinal evolution is observed, but rather a reiteration of the criterion of due date based on Article 14 of the IRPF Law. The only relevant clarification is the confirmation of the application of the reduction for irregular earnings under specific conditions.
Turning points
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Introduces the possibility of applying the 30 percent reduction under Article 18.2 of the IRPF Law if the generation period exceeds two years.
Analysis based on 8 of 8 rulings with a stated position. Updated 1 October 2026.