I’ve written before about how my financial freedom number got smaller twice — the story is in how I calculated my freedom number — and the most common question people ask about that post isn’t how to run the math. It’s “but what number is normal?” That question has no single answer, because freedom isn’t a dollar figure; it’s a lifestyle priced in dollars. Price the wrong lifestyle and you’ll spend years chasing a number that was never yours. So in this post I’ll price three of them — lean, middle, and fat — side by side, with the math out in the open and the caveats attached.
The standard disclaimer up front, because this whole post is directional: I’m not a financial advisor, and this is a planning framework, not advice on what you should do with your money. The 4% figure is a planning heuristic derived from historical U.S. market data, not a guarantee — more on its limits at the end.
The Formula, Once, Plainly
Every number below comes from one division: annual spending ÷ 0.04. That’s the 4% rule — the observation from historical U.S. data that a portfolio supporting withdrawals of about 4% of its starting value each year (adjusted for inflation) has historically survived long retirements in most scenarios. Divide by 0.04 and you multiply by 25, so the shorthand is: freedom portfolio = 25 × annual spending. Whatever you feel about the rule, the arithmetic of the table never changes — what changes is the spending you feed it.
Three Lifestyles, Three Numbers
| Lifestyle | Annual spending | Freedom portfolio (÷ 0.04) |
|---|---|---|
| Lean | $40,000 | $1,000,000 |
| Middle (our family’s zone) | $60,000 | $1,500,000 |
| Fat | $100,000 | $2,500,000 |
Look at what that table is really saying: the difference between lean freedom and fat freedom is a million and a half dollars — decades of working life for most people. The lifestyle you pick is therefore not a preference detail; it’s the single biggest lever in the whole plan. A family that could be genuinely happy on $40,000 is chasing a completely different timeline than one that needs $100,000, and both families should know that before they pick a city, a car, or a house payment.
What Each Tier Actually Buys
Lean ($40k → $1.0M). A paid-off or modest housing situation, one or two paid-off cars, groceries and utilities without stress, and a modest travel budget. This is freedom from work as a requirement, lived efficiently. The failure mode of lean planning is underpricing reality — people at this tier forget car replacements, dental work, and the fact that “modest” is a moving target over a 30-year retirement. Lean works best when the housing is locked in cheap and the health question below is answered.
Middle ($60k → $1.5M). This is the tier most ordinary families actually live in, including mine — the number that shows up when you add up your real last twelve months of spending rather than your aspirational ones. It buys the lean life plus breathing room: a vacation that involves flights, activities for kids, a reasonable buffer for the stuff that goes wrong. What I’ve found is that this tier is also where people’s honest definitions of “freedom” live — not yachts, just options, calm, and time with family. If that’s the definition, the middle tier is the one worth pricing carefully.
Fat ($100k → $2.5M). Full-price housing, new-ish cars, generous travel, expensive hobbies, and a cushion that absorbs most surprises without a thought. Fat freedom buys comfort — and it costs a decade or more of additional working years at typical savings rates. That’s the trade, stated without judgment: some people genuinely love their work and are happy to buy comfort with years. Others discover, usually too late, that they were chasing a lifestyle they didn’t actually want.
The Healthcare Wildcard
Here’s the line item that wrecks more freedom-number spreadsheets than any other: health coverage between leaving work and Medicare eligibility. A family buying coverage on the open market can easily spend $12,000–$20,000 a year in premiums alone, before deductibles — and the number varies wildly by age, state, and plan. Run that through the formula and watch it move the target: an extra $12,000 of annual healthcare spending adds $300,000 to the required portfolio. Not a rounding error. A house.
And it’s asymmetric: your grocery line can flex, your premium quote can’t. This is also the line item most sensitive to policy and market changes, so build it with a margin and reprice it every year. The honest version of every lean number above assumes the healthcare question has a workable answer — a spouse’s plan, a part-time role with benefits, or a priced marketplace plan. If it doesn’t, the real number is the middle-tier number wearing a lean costume.
How Long to Each Number
The lifestyle choice sets the target; the savings rate sets the clock. Using a 7% real-return planning assumption (a historical-style figure — actual returns will not be this smooth), here’s how long it takes a household starting from zero to reach a $1.5M target:
| Monthly investment | Years to $1.5M at ~7% real |
|---|---|
| $2,000 | About 24 years |
| $3,000 | About 20 years |
| $4,000 | About 17 years |
Three observations worth stealing. First, the middle tier is reachable on ordinary incomes — $3,000 a month invested is ambitious but not fantasy for a disciplined dual-income household. Second, the levers stack: drop the target to lean ($1.0M) and every timeline compresses by roughly a third. Third, none of this accounts for current savings — if you already have $200k, subtract the years that head start buys you. The reason small recurring amounts matter so much is laid out in what a recurring $500 replaces.
The Honest Caveats on the 4% Rule
Three limitations to carry with you. Sequence risk: a brutal bear market in your first years of withdrawals can break a plan that a historical average says should have worked — a 40% crash in year three of retirement is a very different event than the same crash in year nineteen. The future isn’t the past: the 4% rule comes from historical U.S. returns; future sequences can be worse, and many planners now use 3.5% or flexible withdrawal rules for long horizons — which is fine, just know it raises every number in the table. It’s a starting point, not a law: taxes, pensions, Social Security timing, rental income, and part-time work all shift the real number. The framework in coast FIRE is a useful companion when the full number feels out of reach — it answers a different, gentler question about how much has to be invested by when.
Your Version of the Exercise
The three tiers above are scaffolding, not answers. Yours gets built from your actual last twelve months of spending, not a table on someone’s blog. One forward step: open your bank and card statements, total the real annual spend, and then compute three numbers — 25× that figure, 25× that figure minus housing, and 25× that figure plus healthcare. Somewhere between those three numbers sits the honest version of your freedom number, and it might be smaller than the internet told you. Mine was — twice.
