This article explores the impacts of the first wave of the COVID-19 pandemic and lockdown policies on young fathers and their families. We present analyses from a larger programme of qualitative longitudinal research examining young fatherhood in the UK and Sweden to develop a unique international comparative and empirical contribution. The views and experiences of young fathers are examined in the context of two ostensibly different policy approaches during the pandemic. Organised thematically to enable comparison, our findings demonstrate myriad impacts, illustrating heightened precarity in young fathers' transitions into and through fatherhood linked to restrictions on their engagement and changes to their education and employment trajectories and relational contexts, especially in the UK. We observe how differences in policy approaches before and during the first wave of the pandemic shaped the experiences of young fathers in the respective countries.