<p>This research explores the relationship between household income levels and key indicators of household financial decision-making. By challenging traditional economic theories predicting a direct correlation between income and savings, this study uncovers the multifaceted nature of household financial behavior and its implications for economic policy and personal financial planning. The study employs Fixed-Effects and Mixed-Effects models to analyze data from 33 OECD countries. This methodology facilitates a comprehensive examination of the association between household income and household financial decision-making indicators, considering a variety of economic contexts and conditions. The analysis reveals a complex relationship where, contrary to expectations, higher income does not result in increased savings. The findings demonstrate that while higher income correlates significantly with increased financial transactions and debt, it does not necessarily translate to greater savings, suggesting that behavioral factors can override standard economic assumptions in this domain. Future research could explore these relationships in a broader range of countries to validate our conclusions. The results underscore the importance of considering factors beyond income levels in the analysis of financial decision-making and the formulation of economic policies and personal financial strategies.</p>