Trauma can have a range of effects on individuals over time, including the potential for positive changes in favorable outcomes commonly referred to as posttraumatic growth. The posttraumatic growth literature has been criticized for various methodological limitations and has largely neglected the exploration of factors that may strengthen or weaken posttraumatic growth trajectories. The present study contributes to this literature by investigating trajectories of five dimensions of posttraumatic growth during the COVID-19 pandemic and the moderating effects of health and financial difficulties on these trajectories. Longitudinal data were collected monthly between July 2020 and December 2022 from a sample of employed adults in Germany, involving N = 1678 participants over 30 time points (Nobservations = 29,552). Results suggest that certain dimensions of posttraumatic growth showed significant increases (i.e., relationships) or decreases (i.e., spirituality and possibilities) over time and that trajectories of three dimensions (i.e., relationships, appreciation, and strength) demonstrated distinctive patterns of interaction with health and financial difficulties. Findings are discussed in the context of the pandemic as well as dynamic theories of personality and identity, with implications for advancing posttraumatic growth theory and research.