Kernrechtsfrage
Whether rental income from the Y.________ property is subject to AHV contributions as self-employed income.
Extrahierter Entscheid
Yes. Because the property was not clearly used privately and formed part of the appellant's real-estate activity, the rental income counts as contributory self-employed income.
Extrahierte Begründung
For a person qualifying as a professional real-estate dealer, income from owned properties is contributory unless the property is clearly private. The Y.________ property was permanently let and not shown to have an independent private function.