Currently, the economy in Sweden and other countries is undergoing major changes, driven for example by increased digitalization and increased demands for sustainability. Both economists and politicians point to the importance of start-ups in dealing with this change, as they are more likely to adopt completely new business models than more mature companies. An important aspect of facilitating the start-up and growth of new businesses is their access to finance, which requires high-quality accounting, which is often costly to produce. At the same time, simplification is highlighted as a way to promote new businesses, which means, among other things, having lower accounting requirements. The two conflicting requirements create a tension that requires balancing in regulation. At present, legislators and regulators have limited scientific support for how the balance should be made and the project provides a basis for how it can be done in an optimal way. Through access to unique Swedish data for unlisted companies, the project examines the effects of smaller companies' accounting choices. More specifically, it examines whether simplified accounting leads to worse or better opportunities for growth. Through a quantitative survey of all unlisted companies, comprehensive knowledge of the companies' own assessments of how accounting should be designed is obtained. This provides the basis for statements on how accounting regulation should be designed to support the creation and growth of new businesses.