Money Management

Money management consists of five elements: "income management," "expense management," "savings management," "investment management," and "debt management." Income management means understanding and maximizing income sources including primary employment, side work, and investment returns. Expense management means separating fixed and variable costs and keeping spending within budget. Savings management means systematically building an emergency fund and purpose-specific savings. Investment management means deploying surplus funds at appropriate risk levels. Debt management means optimizing repayment of mortgages, card loans, and other borrowings.

These five elements are interconnected. Reducing expenses increases the amount available for savings; once savings are sufficiently secured, funds can be directed toward investments. Reducing interest burden on debt frees up money for savings or investments. The essence of money management is balancing these five elements from a holistic optimization perspective.

Practicing money management starts with grasping the "complete picture of your money." List all bank accounts, brokerage accounts, credit cards, and loan balances, and calculate your net worth (assets minus liabilities). Then calculate your monthly cash flow (income minus expenses) to clarify how much you can allocate to savings and investments each month.

The priority order for fund allocation is: (1) securing living expenses, (2) repaying high-interest debt, (3) building an emergency fund, (4) investing through iDeCo and NISA, and (5) other investments and savings. Following this priority order allows you to build wealth while minimizing risk. Conducting monthly reviews using a budget app to check and correct deviations between plan and actual results creates a continuous improvement cycle for your money management.