The article substantiates that, while not being a financial and legal term, the category of well-being nevertheless plays a significant role in financial law, as it largely determines its development trajectory, the direction of public expenditures, influences the development of its institutions and the content of its sources; moreover, through financial and legal norms, the state can adjust the welfare of specific population categories, influence the financial situation of each individual citizen, and change it based on the idea of ensuring well-being of the entire population.