FIRE calculations look precise, but the weakest plans hide uncertainty inside a single target number.
OUR METHODSources → assumptions → European context → verdict
Underestimating expenses
Healthcare, tax, housing maintenance, family support and irregular travel can be missed when the budget reflects only an ordinary month.
Using one aggressive withdrawal rate
A fixed 4% assumption without stress testing can produce too little margin for a very long retirement.
Ignoring sequence risk
Poor returns early in retirement can do disproportionate damage when withdrawals continue during a falling market.
Build resilience
Use spending ranges, conservative scenarios, optional income and a flexible withdrawal plan.
Educational illustration only—not personal financial, tax or investment advice. Tax, salary, broker and market figures change; verify current local information before acting.