This study extends on previous research regarding recovery from work stress by investigating the role of qualitative job demands and leadership in employees' work-related rumination (WRR). The long-term development of WRR was examined from a person-centred approach across 22 months.Drawing on the stressor-detachment framework and the conservation of resources theory, we investigated whether different WRR profiles could be understood in terms of levels of and changes in job demands (quantitative, cognitive, emotional), several aspects of supervisory leadership, and exhaustion that was expected to result from the impeded energy restoration process. A three-wave questionnaire study was conducted among Finnish municipal employees in heterogeneous occupations. Factor mixture modelling was used to identify latent classes (i.e. subgroups of participants with similar mean levels and mean level changes) of WRR. The results indicated five distinct classes of work-related rumination. Participants in the higher WRR classes reported higher levels of job demands, less supervisor fairness, and more abusive supervision. In the decreasing class, WRR decreased concurrently with decreasing job demands. Exhaustion showed considerable congruence with WRR both between and within persons. The findings are discussed from the point of view of a loss cycle concerning energetic psychological resources and difficulties in goal attainment.