Personal Finance

Personal finance refers to the management of an individual's or household's financial activities, including budgeting, saving, investing, and debt management to achieve financial goals and security.

The key pillars are earning income, budgeting expenses, saving money, managing debt, investing wisely, and planning for retirement and insurance needs.

A budget is a financial plan that estimates anticipated income and allocates it to expenses, savings, and debt repayment over a specific period, typically monthly.

The 50/30/20 rule recommends allocating 50% of after-tax income to needs (essentials), 30% to wants (discretionary spending), and 20% to savings and debt repayment.

Net worth is calculated as total assets (cash, investments, property) minus total liabilities (debts, loans), providing a snapshot of financial health.

An emergency fund is a cash reserve covering 3-6 months of essential living expenses to protect against unexpected events like job loss or medical emergencies.

A checking account is designed for frequent transactions with low interest and check-writing capabilities, while a savings account earns higher interest but limits withdrawals to promote saving.

Compound interest is the interest earned on both the initial principal and previously accumulated interest, leading to exponential growth over time; it's often called 'interest on interest'.

Simple interest is calculated only on the original principal amount, resulting in linear growth without compounding effects.

High-interest debt, like credit card balances at 15-25% APR, grows rapidly and consumes income; eliminating it first saves money and boosts financial flexibility for saving and investing.

A credit score is a three-digit number (typically 300-850) that summarizes creditworthiness based on payment history, credit utilization, and other factors, used by lenders to assess risk.

Key factors include payment history (35%), amounts owed/credit utilization (30%), length of credit history (15%), new credit (10%), and credit mix (10%).