Although it is commonly claimed that radical right parties, by developing viable partyorganisations, ultimately are masters of their own electoral fates, we argue that previousresearch is devoid of empirical evidence supporting this proposition. Drawing on extensivesubnational data from Sweden, this article breaks new ground by gauging the impact of threeunique measures on the electoral performance of the Sweden Democrats in the 2006 and 2010elections. When controlling for crucial demand- and supply-side factors that are beyond thecontrol of radical right parties themselves we find that the size, competence, and cohesion ofthe party organisation all were decisive to the electoral performance of the SD. Consideringthat Sweden is often viewed as a least likely case for radical right party success, we concludeby arguing that these partisan challengers most likely are more capable of organising forelectoral success than hitherto assumed.