Key Data and Analysis
Seven FIRE planning mistakes with timeline impact and corrections
| Mistake | Typical Impact on Timeline | Fix |
|---|---|---|
| Underestimating expenses by 20% | +4-6 years to FIRE | Budget conservatively, include inflation |
| Ignoring healthcare costs pre-Medicare | +$8,000-$20,000/year in expenses | Include ACA costs in FIRE budget |
| Using 5% SWR instead of 3.5-4% | Runs out of money in 20-30 years | Use 3.5% for early retirement |
| No Roth conversion ladder | Tax penalties on IRA access before 59.5 | Start 5-year ladder 5 years before FIRE |
| Ignoring sequence-of-returns risk | Portfolio failure in bad return sequence | 1-2 year cash buffer at FIRE |
| Not accounting for lifestyle inflation | FIRE number grows as you save | Model 2-3% lifestyle cost growth annually |
| Assuming current tax rates are permanent | Tax increases can raise effective cost | Hold mix of traditional and Roth accounts |
⚠️Healthcare Is the #1 FIRE Budget Mistake
The most common FIRE budget mistake: failing to include $700-$1,500/month in healthcare costs pre-Medicare. Missing this adds $210,000-$450,000 to your required FIRE number. Always model healthcare explicitly.
Deeper Analysis
Healthcare cost impact on FIRE number by coverage scenario
| Healthcare Scenario | Annual Cost | FIRE Number Impact (4% SWR) |
|---|---|---|
| ACA with subsidies (low income) | $200-400/month | +$60,000-$120,000 |
| ACA full cost (moderate income) | $600-1,000/month | +$180,000-$300,000 |
| Pre-Medicare age 55-64 private | $1,000-1,800/month | +$300,000-$540,000 |
| Medicare at 65+ | $170-400/month | +$51,000-$120,000 |
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