How the DGT's position has evolved
Current position
To apply the special merger regime, the operation must be carried out within the commercial sphere according to Law 3/2009 and comply with Article 76.1 of the LIS (Corporate Income Tax Law). The existence of negative tax bases does not invalidate the regime as long as the main purpose of the merger is not the exploitation of said bases and valid economic reasons exist, such as the restructuring or rationalization of activities. The absorbing company subrogates into the tax bases of the absorbed company within the legal limits.
The DGT's position has remained constant since 2015. The rulings reiterate that the presence of negative tax bases does not prevent the regime if valid economic reasons exist and the mere tax advantage is not sought. No changes are observed in the interpretation of the requirements of Law 3/2009 or the LIS.
Analysis based on 16 of 16 rulings with a stated position. Updated 26 September 2026.