How the DGT's position has evolved
Current position
Income from employment must be attributed to the tax period in which the judicial ruling recognizing them becomes final. To apply the 30% reduction for a generation period exceeding two years, the arrears must cover a time span greater than said period and the reduction must not have been applied in the five previous tax periods. In the event that the delay is due to causes not attributable to the taxpayer, a supplementary self-assessment is permitted without penalties or interest.
The DGT's position has moved from a systematic refusal to apply the 30% reduction (V0624-15) to admitting its application if the requirements regarding the generation period and previous application limits are met (V0189-21 and V5324-26). Likewise, the imputation mechanism has been specified, allowing for supplementary self-assessment without penalties when the delay is not attributable to the taxpayer (V2160-20 and V1273-22).
Turning points
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Allows the application of the 30% reduction for generation periods exceeding two years if the arrears are attributed to a single period.
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Establishes that, in the event of delays not attributable to the taxpayer, a supplementary self-assessment must be carried out without penalties or late payment interest.
Analysis based on 19 of 22 rulings with a stated position. Updated 24 September 2026.