Financial literacy (FL) is increasingly recognized as a critical determinant of entrepreneurial success, enabling effective budgeting, investment management, and informed decision-making. While existing studies demonstrate that FL enhances firm performance, mitigates credit risk, and reduces information asymmetries, the focus has primarily been on established ventures. In contrast, the formative stages of entrepreneurship remain under-explored, despite nascent entrepreneurs facing pronounced uncertainty and resource constraints. This ongoing research addresses this gap by examining how FL is developed through processes of financial socialization among nascent entrepreneurs active in two municipalities in the southwest of Sweden. Building on financial socialization theory, which traditionally emphasizes family influence, the study extends the framework to include entrepreneurial ecosystems - incubators, networks, investors, and municipal agencies - as potential sites of financial competence formation. The project employs a mixed-method design: an initial phase of qualitative interviews with 10 - 15 nascent entrepreneurs and key ecosystem actors will be followed by a broader survey. The survey data will be analyzed using both Structural Equation Modelling and Fuzzy-Set Qualitative Comparative Analysis, allowing identification of causal configurations linking ecosystem interactions to FL development. Preliminary insights from pilot studies indicate considerable heterogeneity in FL among nascent entrepreneurs. Particularly, individuals embedded in broader and more diverse networks exhibit higher levels of financial competence, underscoring the role of ecosystem engagement as a complement or substitute to traditional family-based financial socialization. This research contributes theoretically by bridging two literature - financial socialization and entrepreneurial FL - that have thus far remained largely distinct. At the same time, the project offers practical implications for policymakers and support organizations by identifying mechanisms through which financial competencies can be fostered more effectively. Ultimately, by illuminating the processes shaping FL in the early entrepreneurial life-cycle, the study advances understanding of both entrepreneurial development and regional economic growth.