💰

Personal Finance Basics

Sep 26, 2025

Overview

This lecture covers the foundations of personal finance, including budgeting, saving, debt, credit, insurance, investing, taxes, banking, housing, car buying, scams, and career/education decisions.

Course Structure & Foundations

  • The course includes 16 units: introduction, budgeting, financial goals, loans, credit, insurance, investments, scams/frauds, taxes, employment, banking, car buying, housing, and additional resources.
  • Financial literacy means understanding how to manage, save, invest, and protect your money.

Budgeting & Saving

  • A budget is a money management plan that tracks income, expenses, and savings to avoid overspending and debt.
  • The 50/30/20 rule suggests: 50% for needs, 30% for wants, 20% for savings.
  • Savings should include an emergency fund covering 3–6 months of living expenses.
  • It's helpful to use separate savings accounts for different goals and automate transfers.

Credit & Credit Scores

  • Credit score measures your likelihood to repay debts; in the US, it's between 300–850.
  • Payment history (35%), credit usage (30%), and length of credit history (15%) are major factors.
  • Pay bills on time and keep credit utilization low to maintain or improve your score.
  • Opening several new credit cards at once can hurt your score; income is not factored.

Financial Goals & Net Worth

  • Set SMART goals: Specific, Measurable, Achievable, Realistic, Time-bound.
  • Goals are categorized as short-term (<1 year), medium-term (1–5 years), and long-term (>5 years).
  • Net worth = Total assets – Total liabilities; aim for a positive net worth over time.

Loans & Debt

  • Loans can be installment credit (fixed payments) or revolving credit (e.g., credit cards).
  • APR (annual percentage rate) shows the true yearly cost of a loan.
  • Good debt (e.g., education, home) can increase future wealth; bad debt (e.g., payday loans) weakens financial health.
  • The high rate and snowball methods can help with debt repayment.

Insurance & Risk Management

  • Insurance transfers financial risk to a third party; key types include health, car, property, and life insurance.
  • Terms: premium (regular payment), deductible (out-of-pocket), co-pay (shared payment), policy limit (maximum payout).
  • It's best to get insurance before you need it for emergencies.

Investing & Retirement

  • Saving is for short-term, low-risk needs; investing is for long-term growth with higher risk.
  • Compound interest grows money faster over time; start investing early.
  • Typical investment products: bonds (low risk), mutual/index funds (medium risk), stocks/cryptocurrency (high risk).
  • Use retirement accounts (401k, IRA, etc.) for tax advantages.

Scams & Fraud

  • If it sounds too good to be true, it probably is.
  • Protect personal information and be cautious with suspicious offers or requests.

Taxes & Employment

  • Taxes fund public services and can be flat (e.g., sales tax) or progressive (e.g., income tax).
  • Tax credits and deductions can reduce what you owe.
  • Consider all costs and potential financial aid when choosing education or employment.

Banking, Interest, & Inflation

  • Banks earn by lending deposits at higher interest rates than they pay savers.
  • Types of banks: national, regional, credit unions, online banks.
  • Common accounts: checking (daily use), savings (interest), CDs (higher interest, locked funds), investment accounts.
  • Inflation reduces money's value over time—investing helps counteract this.

Housing & Renting

  • Deciding to rent or buy depends on total costs (mortgage, taxes, upkeep) versus rent and potential investment returns.
  • Use calculators and consider non-financial factors before deciding.

Key Terms & Definitions

  • Budget — a spending and saving plan based on income and expenses.
  • Emergency fund — savings reserved for unexpected expenses, ideally 3–6 months' worth.
  • Credit score — a numerical measure of creditworthiness.
  • APR — annual percentage rate, the yearly cost of borrowing.
  • Net Worth — total assets minus total liabilities.
  • Premium — regular payment to keep insurance active.
  • Deductible — amount paid out-of-pocket before insurance covers remaining costs.
  • Compound interest — earning interest on both the initial principal and accumulated interest.
  • Inflation — the general rise in prices, lowering money’s purchasing power.

Action Items / Next Steps

  • Calculate your monthly budget and net worth.
  • Build an emergency fund covering 3–6 months of expenses.
  • Check your credit score and make a plan to improve it if needed.
  • Set one SMART financial goal and outline steps to achieve it.
  • Research types of insurance and ensure you have adequate coverage.
  • Review your current savings and investment accounts; consider starting or increasing retirement contributions.
  • Stay vigilant against scams—never share sensitive information without verification.
  • Use a rent vs. buy calculator if considering housing decisions.