The process by which entrepreneurial companies undertake international business activities has been examined from various perspectives. Despite increased research efforts, the literature on international entrepreneurship (IE) lacks a systematic understanding of the financial drivers of the internationalization process of entrepreneurial companies. The literature is fragmented, heterogeneous in terms of the conditions of the theoretical framework, methods and conceptualizations, which tends to make it difficult to accumulate and integrate academic knowledge and leaves important aspects unexplored. This article aims to synthesize and integrate existing interdisciplinary research on IE and business finance to answer the question of what sources of funding corporate companies rely on abroad. From the synthesis, we develop a holistic framework that offers a comprehensive understanding of the state of the art, as well as possible avenues for future research at the interface of IE and the business finance literature. To date, there are no systematic reviews that deal exclusively with the financial drivers of the internationalization behavior of entrepreneurial companies.