Monte Carlo Simulator
Stress-test your retirement plan across 500 simulated market paths.
Read the guide: Retirement PlanningInitial Withdrawal Rate4.00%
7%
15%
3%
Plan Success RateAt Risk
70.2%
In 351 of 500 simulated market paths, the portfolio lasted the full 30 years without running out.
Portfolio Outcome Range
90th percentile
Median
10th percentile
These outcomes are generated by randomly sampling annual returns from a normal distribution around your assumptions — they are simulations, not historical data. Real markets have fatter tails than a normal distribution, so severe crashes are somewhat more likely than this model implies. Treat a high success rate as encouraging, not guaranteed.