How Much Do You Need to Retire?
The honest answer is that no single number fits, and every number you have been given is a rule of thumb wearing a suit. What follows is how the estimate is actually constructed, so you can build your own instead of borrowing someone else's.
Start from spending, not income
Retirement planning built on a percentage of pre-retirement income assumes your spending tracks your earning. For most households it does not. Take twelve months of real expenses, subtract what stops at retirement — commuting, payroll taxes, the savings rate itself — and add what starts, mostly healthcare.
The withdrawal rate is a range, not a constant
The familiar four percent figure came from a study of a specific portfolio over a specific historical window. It is a reasonable anchor, not a law. Sequence-of-returns risk in the first five years does more damage than anything that happens later, which is why the same portfolio can support very different withdrawals depending on when you start.
What to do with the number
Treat it as a checkpoint you revisit annually, not a finish line you cross once. The plan that survives is the one that gets adjusted.
Educational content only. Not financial advice.