Given ever increasing work and nonwork demands, achieving work-nonwork (WNW) balance is an important priority for many employees. Scholars have only recently settled on a definition of WNW balance as multidimensional and, as such, our understanding of its antecedents and outcomes is limited. Drawing on Conservation of Resources theory, we explore how organizations can support employees to achieve WNW balance and whether ‘balanced’ employees are more productive at work and satisfied with life. In detail, we hypothesize that the positive effect of supervisor WNW support (FSS) on employees’ life satisfaction and job performance is mediated by multidimensional WNW balance. We find, across two studies with two waves each, that only the dimension of WNW balance effectiveness and not the dimension of WNW balance satisfaction mediated the relationships between FSS, life satisfaction (Study 1 and 2) and self-rated job performance (Study 1). The relationship between FSS and supervisor-rated job performance (Study 2) was not mediated by either WNW balance dimension. As such, organizations can facilitate WNW balance through FSS, while ‘balanced’ employees seem indeed happier with their life and consider themselves to be better performing at work. We discuss the unexpected finding regarding the superior role of WNW balance effectiveness over WNW balance satisfaction for our outcomes in relation to the conceptualization of WNW balance as multidimensional and delineate important theoretical and practical implications.