"On income" is a treatise by the famous ancient Greek writer Xenophon, which is part of his work "Economics". In this book, the author examines the issue of effective use of stocks and financial management. Xenophon studies in detail the question of the origin of income, its proper preservation and multiplication. It reveals the key principles of economic strategy and calls for an intelligent attitude to money. This book will be a useful guide for those interested in economics, management and finance, as well as for those seeking to improve their financial literacy.