Ch7. Personal Finance — Retirement Planning & the FIRE Movement
How Much Do You Need to Retire?
The 4% Rule: Withdraw 4% of your retirement portfolio in year one, then adjust for inflation annually. Historically, this has a high probability of lasting 30+ years.
Required nest egg = Annual expenses / 0.04
Examples:
| Annual Spending | Required Portfolio |
|---|---|
| $40,000 | $1,000,000 |
| $60,000 | $1,500,000 |
| $80,000 | $2,000,000 |
| $100,000 | $2,500,000 |
Social Security Strategy
Key facts:
- Full Retirement Age (FRA): 67 for those born 1960+
- Claiming at 62: Reduces benefit by ~30%
- Delaying to 70: Increases benefit by 8% per year beyond FRA
Break-even analysis: If you delay from 62 to 70 (8 years without benefit), you need to live to approximately age 80 to come out ahead.
Strategies:
- If healthy and expect to live to 80+: Delay to 70
- If married with income disparity: Higher earner delays; lower earner claims earlier
Retirement Account Projections
Example: $500/month invested at 7% annual return
| Start Age | At Age 65 | Total Invested |
|---|---|---|
| 25 | ~$1.2M | $240,000 |
| 35 | ~$600,000 | $180,000 |
| 45 | ~$278,000 | $120,000 |
The difference between starting at 25 vs. 35 = $600,000 from just 10 additional years of compounding.
FIRE: Financial Independence, Retire Early
The FIRE movement centers on accelerating financial independence through high savings rates.
FIRE Formula:
- Calculate annual expenses
- Multiply by 25 (= 4% rule target)
- Invest aggressively until you reach the number
FIRE Types:
| Type | Monthly Spending Target | Savings Rate |
|---|---|---|
| Lean FIRE | <$2,500 | 60–70%+ |
| Regular FIRE | 5,000 | 50–60% |
| Fat FIRE | $6,000+ | 40–55% |
| Barista FIRE | Partial income from work | 30–45% |
Is FIRE right for you? It requires genuinely enjoying a frugal lifestyle, not just tolerating it temporarily. Many FIRE adherents find they don’t want to fully retire — they want the option to stop working, not necessarily to exercise it.
Chapter 8 Preview
The final chapter: 10-Year Financial Roadmap & Financial Health Checklist — complete the series with a personalized action plan.
OIYO Editorial
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