This report examines the causes and consequences of the 1998 financial crisis in Russia, a pivotal event in the nation's post-Soviet economic transition. The analysis delves into the macroeconomic factors that contributed to the crisis, including fiscal mismanagement, speculative attacks on the ruble, and structural weaknesses within the financial system. We will also explore the immediate impact of the default on various sectors of the Russian economy, such as banking, industry, and the social welfare system, including its long-term effects. This study aims to provide a comprehensive understanding of this critical period in Russian economic history.