Ch1. Personal Finance Fundamentals — Setting Financial Goals & Budgeting

Why Personal Finance Matters

A high income doesn’t guarantee wealth. Someone earning $150,000 but spending$180,000 accumulates debt. Conversely, earning $60,000 while saving and investing 40% can lead to financial independence by your mid-40s.

The three pillars of personal finance:

1. Spend less than you earn
2. Consistently save and invest the difference
3. Let compound interest work with time

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Step 1: Know Your Net Worth

Net Worth = Assets − Liabilities

Assets	Examples
Liquid	Checking/savings accounts, money market
Investments	Stocks, ETFs, mutual funds, bonds
Real estate	Current market value
Retirement	401(k), IRA, pension

Liabilities	Examples
Short-term	Credit card balances, personal loans
Long-term	Mortgage, student loans, auto loans

Target: Net worth should be positive and growing year over year.

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Step 2: The 50/30/20 Budget Rule

Category	Percentage	Examples
Needs	50%	Rent, groceries, utilities, transportation
Wants	30%	Dining, entertainment, travel, subscriptions
Savings/Debt repayment	20%	Emergency fund, investments, extra debt payments

Note: 20% is the minimum. For financial independence goals, target savings rates of 30–50%+.

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Step 3: Build Your Emergency Fund (Top Priority)

Before investing, build your emergency fund.

Target: 3–6 months of living expenses

Where to keep it:

• High-yield savings account (HYSA): 4–5% APY is currently available at many online banks
• Money market account
• Short-term Treasury bills via Treasury Direct

Rule: Don’t invest your emergency fund. It must be immediately accessible.

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Step 4: Eliminate High-Interest Debt First

Repayment priority by interest rate:

Debt Type	Rate	Priority
Credit card revolving debt	20–28%	Immediate — avalanche method
Personal loans	8–18%	Urgent
Car loans	4–8%	Normal pace
Student loans	3–7%	Can parallel invest
Mortgage	3–7%	Low priority; parallel invest

Avalanche method: Pay minimums on all debts; throw all extra cash at the highest-rate debt first.

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Step 5: Set SMART Financial Goals

Goal Quality	Example
Vague (bad)	“I want to be rich”
SMART (good)	“Save $15,000 emergency fund within 18 months by automating$833/month”
SMART (good)	“Pay off $8,000 credit card debt in 12 months by paying$667/month”

SMART = Specific, Measurable, Achievable, Relevant, Time-bound

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Chapter 2 Preview

Next: Savings & Investment Basics — savings accounts vs. index funds vs. retirement accounts, and the real math of compound interest.