Yes, at about $36,000 to $37,000 a year of all-in spending. Here's the real after-tax math, why it isn't the $40,000 everyone quotes, and the one IRS rule that makes 55 a special age to quit.
This is the single most asked version of the early retirement question, and the standard answer you'll find is the 4% rule: $1 million times 4% is $40,000 a year, so if you can live on that, you're done. I built a calculator that backtests retirements against actual market history with real federal and state tax math, so instead of repeating the rule I ran the scenario properly. The honest answer lands a little lower than $40k, and the reasons are worth understanding before you hand in a resignation letter.
| Where the money sits | At a 4% rate | At 3.5% |
|---|---|---|
| All of it in a taxable brokerage | $36,750/yr | $32,250/yr |
| $650,000 in a 401k, rest taxable, Roth ladder running | $36,000/yr | $31,750/yr |
Maximum all-in spending, including $11,000/yr for health insurance. Single filer, a flat ~5% state tax, 7% real return. Every figure links to the live calculation, so you can change any assumption.
So yes, $1 million at 55 retires you, at roughly $36,750 a year of total spending on the standard 30-year withdrawal rule, or about $32,250 if you want the more conservative 3.5% rate I'd actually use for a retirement that could run 40 years. If your life costs $36k a year including health insurance, you can stop working now. If it costs the full $40,000 the napkin math promised, you're not far off: wait until about age 56.8, or get the portfolio to roughly $1,079,683, and it clears.
Two leaks the rule of 25 ignores. The first is taxes. The 4% rule hands you a gross number, but withdrawals from a 401k are ordinary income, and even brokerage sales owe capital gains in most states. To net $40k of actual spending you need to pull more than $40k out. The second is health insurance, which at 55 is not optional and not cheap: you're ten years from Medicare, and I budgeted $11,000 a year for a marketplace plan in these runs, which eats a quarter of the napkin budget on its own. I go deeper on both in taxes in early retirement and health insurance before 65.
Here's the part that makes 55 a genuinely special age to retire, and that generic articles routinely miss. Normally money inside a 401k is penalty-locked until 59½. But the IRS makes an exception: if you separate from your employer at 55 or later, withdrawals from that employer's 401k skip the 10% penalty entirely (IRS Topic 558). It doesn't apply to IRAs, and it doesn't apply to old 401ks from previous jobs unless you rolled them into the current one before leaving. Which means if you're 54 and planning this move, the highest-leverage thing you can do might be consolidating old plans into your current 401k before you quit.
A fixed withdrawal rate assumes you'll experience the average market. You won't; you'll get one specific sequence of years, and a crash in the first few does far more damage than the same crash later, because you're selling shares at the bottom to eat. That's sequence-of-returns risk, and it's why the calculator doesn't just check the math at 7%: it replays your retirement against every historical starting year, including 1929, 1966 and 1973, and tells you whether the plan survived all of them. For a 55-year-old with this portfolio, the difference between a 4% plan and a 3.5%-plus-cash-buffer plan is mostly about how comfortable you are with the worst handful of those starting years.
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Not financial advice. Consult a fee-only fiduciary CFP for personalized guidance. Tax figures use 2026 brackets.