Poor Personal Finance Management: Systemic Errors and Their Cost Introduction: Dysfunction as a System Poor personal finance management is not just a lack of money or random mistakes. It is a stable system of dysfunctional financial practices based on cognitive biases, emotional reactions, and the absence of basic planning models. From a scientific point of view, this can be considered a series of deviations from a rational decision-making model, predictably leading to negative consequences: a debt trap, financial stress, the inability to achieve long-term goals, and vulnerability to external shocks. 1. Lack of Budgeting and the Mental Accounting Effect One of the fundamental errors is the absence of a comprehensive picture of income and expenses. Instead, a person uses "mental accounting" (mental accounting), a concept described by Nobel laureate Richard Thaler. Money is artificially divided into categories with different spending rules: "salary" (serious), "bonus" (can be spent on luxury), "change" (not counted). This leads to irrational decisions: a person may refuse to spend on necessary things using "strict" money and at the same time spend "easy" money carelessly. Example: Research by Dilip Soman showed that people who receive a large tax refund are much more likely to make large non-essential purchases than if the same amount were distributed in small parts of their regular income. The brain perceives this as "unexpected luck" that does not need to be planned. 2. Debt Cascade: From Consumer Loans to a Financial Pyramid Poor management is characterized by the uncontrollable use of high-cost debt instruments to finance current consumption or cover previous debts. A key role is played by hyperbolic discounting — a cognitive bias where immediate rewards (purchases now) strongly outweigh future costs (interest payments). Minimum payment trap: Banks intentionally set a low minimum payment on credit cards (often 3-5% of the debt). If only the minimum payment is made ... Read more