This is a live interactive demo using sample data. Drag the sliders to see how your plan changes in real-time. Your real plan connects to your own Google Sheet.
Adjust the sliders to see your plan change
$87,000
7.0%
3.0%
Age 63
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Monte Carlo Success
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500 market simulations
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Safe Extra Spending
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more per year, goal still met
Projected Legacy
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on track to leave —
Total Portfolio
$925K
Starting value · all accounts
Portfolio Sustainability
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Tax Bucket Evolution
Pre-Tax heavy → Roth grows via conversions
Income Bridge
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FIRE Intelligence
Safe Withdrawal Rate
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FI Date
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FIRE Type
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Coast FIRE Number
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Live Stress Test — Could This Plan Survive a Crash?
Drop a real market crash on the worst possible year — the year this plan retires — and watch what it does to their safe extra spending. Same scenarios as the full Stress Test, built from actual S&P 500 losses.
Lowest Point
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Ending Balance
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Safe Extra / Cut
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Pick a crash above to see how this plan holds up when the market drops at the worst possible time.
You just tested a sample plan
Now run it on your retirement
Connect your own private Google Sheet — your accounts, your Social Security, your spending, your legacy goal — and see whether your plan survives a 2008-style crash, how much extra you could safely spend, and how long your money really lasts.
