Kernrechtsfrage
Whether annual payments for know-how transfer, trademark rights, and consulting after sale of a business are AHV-contributory income from self-employment.
Extrahierter Entscheid
Yes. The payments were causally linked to the appellant's prior self-employed activity and, for the consulting component, constituted self-employed work; therefore they were subject to AHV contributions.
Extrahierte Begründung
The decisive criterion is whether the income has a relevant causal connection to an earning activity. The transferred know-how and trademarks were fruits of the appellant's earlier business activity, and the consulting obligation was itself self-employed activity. The fact that the values were immaterial, not balance-sheet assets, or not easily enforceable did not remove the contribution duty.