FI Calc
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FI Calc runs your numbers against more than a century of market history, letting you pit different withdrawal approaches against each other. Compare constant-dollar withdrawals, percentage-of-portfolio, guardrails strategy, and more to see which approach survives best in your retirement.
The strategy comparison angle sets it apart from simpler calculators. For DIY planners figuring out whether to adjust their withdrawal each year or hold it steady, this tool gives empirical answers from real past markets.