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Early Retirement / FIRE Readiness Calculator
Determine your exact Financial Independence (FI) number and time to freedom. Model different FIRE variants (Lean, Regular, Fat, Coast, and Barista), test Safe Withdrawal Rates (SWR), and harness the logarithmic power of your savings rate.
Quick Test Scenarios:
Financial Independence Inputs
The single most influential driver of your required FI portfolio size.
Select Active FIRE Target Variant
Wealth Trajectory & Freedom Crossover Point
Portfolio accumulation curve with regular deposits intersecting your target FI capital threshold.
FIRE Variants Comparison
Compare portfolio requirements and timeline across different post-work lifestyles.
Savings Rate Leverage Sensitivity Table
How small changes in your savings rate compress decades off your working career.
The Trinity Study and Safe Withdrawal Rates for Early Retirees
Financial Independence, Retire Early (FIRE) relies on accumulating an invested portfolio large enough that its perpetual distributions fund all living expenses without depleting principal.
The 4% Rule vs. The 3.25% - 3.50% Early Retirement Reality
The famous 1998 Trinity Study evaluated 30-year retirement horizons for traditional 65-year-old retirees and found that a 4% initial withdrawal rate (adjusted annually for inflation) had a 95%+ historical success rate over 30 years in a 60/40 or 75/25 stock/bond portfolio.
However, early retirees retiring at age 35, 40, or 50 face a 40 to 50-year retirement horizon. Over multi-decade timelines, modern empirical research (such as Morningstar and Early Retirement Now) recommends a conservative safe withdrawal rate of 3.25% to 3.50% (translating to a 28x to 31x annual spending target) to withstand extended bear markets and sequence-of-returns risk.