<p>Time and temporality have been a core theme in youth studies, underpinning much of the work that has been done on how young people fashion a life for themselves now and into the future. Time in youth studies has been conceived primarily as a container in which transitions from childhood to adulthood occur, an external dynamic that young people have to respond to and strategise within. Additionally, there has been an emerging focus on how contemporary social and economic shifts have transformed youth temporalities, particularly their orientation towards a future. This commentary considers time and youth through the lens of young adults who invest in the share market to consider how investing cultures have recast time as a capital to be used to build wealth. Specifically, this commentary interrogates how the logic of compound interest, which relies on time spent in the market, has reframed time for young adults as a resource that they are abundant in, especially considering their comparatively limited financial capital. This commentary concludes with some considerations about what this new dynamic of time as a capital to be ‘used’ means for future research within youth studies.</p>