Small and medium-sized enterprises are a segment of companies that operate between micro-enterprises and large enterprises. The significance of small and medium-sized enterprises for the economy is large. The SME sector encourages employment and the creativity of entrepreneurs, given that it is oriented towards meeting the needs of consumers. This in turn encourages competition and, consequently, a greater variety of offers, all of which contribute to the growth of the country's economic potential. When choosing the legal form of a company, it is important to determine the direction in which the company wants to develop. For the development of small and medium-sized enterprises, it is necessary to satisfy the general conditions for the development of society as a whole, and then also the special conditions for the development of entrepreneurship. Entrepreneurial infrastructure in the Republic of Croatia provides entrepreneurs with business premises, additional training, financial and advisory assistance. Some of the most common sources of financing for SMEs include the accumulated capital of the company and the entrepreneur's capital, borrowing, government grants, crowdfunding, and business angels. EU funds are highlighted as a prominent source of financing for SMEs, which include: the European Fund for Regional Development, the European Social Fund Plus, the Cohesion Fund, the European Agricultural Fund for Regional Development and the European Maritime and Fisheries Fund. Nadria Travel is an incoming tourist agency that deals with renting accommodation facilities, vehicles and boats, booking excursions and numerous other activities on the islands of Ugljan and Pašman. The problems the agency faces are numerous, and they represent the biggest general problem facing the Croatian islands, i.e., insufficiently developed infrastructure and emigration of the population, which are limiting factors for their development, and thus for island entrepreneurship. Following the established need for its own reservation system, in accordance with the trend of increasing the number of online reservations, a project was developed according to the tender "Grants for newly established companies" which is intended for micro, small and medium-sized entrepreneurs.