Financial Independence / Retire Early went mainstream in the 2010s. In 2026, with higher inflation, higher housing costs, and moderating market returns, the math is harder — but still achievable for people who start in their 20s and maintain high savings rates.
The math: savings rate determines everything
| Savings rate | Years to FI (from zero) |
|---|---|
| 10% | ~43 years |
| 20% | ~37 years |
| 30% | ~28 years |
| 50% | ~17 years |
| 65% | ~10.5 years |
| 75% | ~7 years |
Assumes 7% real return, 4% withdrawal rate at retirement.
The 4% rule in 2026: still valid?
The 4% rule (withdraw 4% of portfolio annually, adjusted for inflation) was derived from the 1998 Trinity Study using historical US market returns. In lower-return projections (Vanguard projects 4–6% real returns for the next decade), many FIRE practitioners use 3–3.5% withdrawal rates for longer retirements (40+ years).
The number most people get wrong
Most FIRE calculations use current spending. The actual number you need: 25x your annual retirement spending (at 4% rule), inflation-adjusted. Healthcare is the wild card — most FIRE projections underestimate health insurance costs pre-Medicare (age 65).
🎯 Your FIRE number
The FIRE variants most people don't know about
- LeanFIRE: FI on minimal spending ($25,000–$40,000/year). Requires extreme frugality.
- FatFIRE: FI with high lifestyle spending ($100,000+/year). Requires $2.5M–$4M+ portfolio.
- BaristaFIRE: Partially FI — cover most expenses with investments, work part-time for health insurance and spending money.
- CoastFIRE: Save enough that compound growth carries you to full FI without additional contributions. Work for current expenses, let investments grow.
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About the author
Enrique 'Kike' Faúndez is an Information Systems and Management Control Engineer from Universidad de Chile, with master’s degrees in Finance from Universidad de Chile and Industrial Engineering from Pontificia Universidad Católica de Chile. He has 15+ years of experience in regulated financial services across finance, operations, and digital product development. He founded CashControlly in Santiago, Chile, with the conviction that personal financial control should not be a privilege, but an accessible and well-designed tool.
- Master's in Finance, Universidad de Chile
- Master's in Industrial Engineering, Pontificia Universidad Católica de Chile
- Information Systems and Management Control Engineer, Universidad de Chile
- AI and ITIL certifications
- 15+ years in regulated financial services
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