In the Netherlands, self-employment and entrepreneurship among older age groups (here defined as after state pension age) are rising. On the one hand, this is due to an increase in career self-employed persons and their tendency to work until older ages than employees. On the other hand, this seems to be related to the development – which is not unique for the Netherlands – that employees enter self-employment after their retirement from a wage-and-salary job, as a way to bridge the period between career employment and full-time retirement (Von Bonsdorff, Zhan, Song, & Wang, 2017; Wang, Zhan, Liu, & Shultz, 2008). In order to get a better understanding of senior self-employment in the Netherlands, we will therefore make a distinction between two groups of senior self-employed persons based on their work history: (a) career self-employed individuals who continue their employment activities beyond the state pension age, and (b) career wage-and-salary workers who re-enter the labour market after retirement as being selfemployed. These two groups may have different options and motives for continuing / starting work as an entrepreneur after state pension age. More particularly, in this paper we try to find out whether continuing / starting to work in self-employment beyond state pension age is predominantly driven by opportunity, or intrinsic motives, or rather by driven by financial needs and a lack of opportunities in the primary labour market. After this short introductory section, we will continue with a descriptive paragraph (Section 2), which sketches the senior self-employed in the Netherlands in terms of size and composition. Thereafter, we will look more in depth into the two groups of the senior self-employed. In Section 3, we focus on the career self-employed. In Section 4, we focus on post-retirement self-employment of former wage-andsalary workers. By synthesizing insights from the existing empirical literature on the senior self-employed in the Netherlands and by analysing recent data on ...