We study the accumulation of financial competencies in a model of dynamic skill formation. We find evidence of complementarities between financial literacy and risk attitudes. Risk tolerance facilitates experimentation and learning-by-doing. Latent risk attitudes and financial literacy are unevenly distributed across households and do not align with general human capital. Linking estimates with data on household portfolios, we show that early-life differences in financial literacy may account for more than half of the standard deviation of wealth by age 60. Dynamic complementarities in skill formation imply that early interventions could reduce later-life inequality while boosting wealth growth.