Financial Independence — The FIRE Framework

The FIRE Framework

Financial Independence, Retire Early

FIRE is built on one equation: accumulate 25× your annual expenses. At that portfolio size, the 4% withdrawal rule provides income indefinitely — funded entirely by investment returns while principal stays intact.

The lever that matters most is not income — it is savings rate. Someone saving 50% of income reaches financial independence in roughly 17 years regardless of what they earn. At 70% savings rate: 8.5 years.

FIRE Number

Annual expenses × 25 = target portfolio. Spending $50,000/year? Your FIRE number is $1.25 million. Reducing spending to $40,000 cuts your target to $1M — a $250K reduction in required savings.

25×

Annual spending = FIRE portfolio target

Safe annual withdrawal rate based on historical market data

→ Lean FIRE: extreme frugality, sub-$40K annual spending
→ Classic FIRE: $50–80K/year, ~25× portfolio
→ Fat FIRE: $100K+ annual spending, larger portfolio
→ Barista FIRE: semi-retire with part-time income supplement

Calculate Your FIRE Number

Annual expenses × 25 = target. Track your number monthly as investments grow toward it.

Maximise Savings Rate

Every 1% increase in savings rate shortens your path to FI. The savings rate, not income, determines the timeline.

Invest in Low-Cost Index Funds

VTSAX, VTI, or equivalent. Broad market exposure, minimal fees. The engine of every FIRE portfolio.

Optimise Tax Strategy

Tax-advantaged accounts, Roth conversions, and capital gains harvesting can add years to your runway.