It seems like FIRE survived after all.
The acronym stands for Financial Independence, Retire Early. It's a movement I've been following since the late 2010s, with the emphasis on financial calculations and statistical analysis tickling my mathematical brain.
At the same time, its core tenet of saving a lot of income early on only works for a handful of high-earning professions; software engineering is one of the few that qualifies. For me anyway, running Monte Carlo simulations on projected portfolio returns is a fun exercise.
But I had figured out FIRE's fatal flaw. It makes a series of simplifying assumptions—not around the numbers necessarily, but on how people's needs and goals, and therefore behaviors, change through their stages of life. Advocates are so fixated on "hitting their number" for retirement savings that they sacrifice their livelihoods to achieve it, yet after quitting their jobs, realize unaccounted expenses pop up or uncontrolled events invalidate their carefully calibrated calculations. After experiencing the euphoria of being done with work, it's a huge downer to have to drag yourself back into the job market.
The FIRE Comeback
My prediction erred because the markets have ripped since the pandemic-induced inflation dip. Just looking at the last 5 years—which includes a down year in 2022—the S&P has returned almost 14% annually, so in aggregate the market has almost doubled in this timeframe. Portfolios have thus ballooned in value, which starts to make folks think about living solely off their investments.
Additionally, AI advancements are disrupting knowledge work, and software engineering is at the vanguard of this shift. Previously, industry veterans could time their career exits to the size of their portfolios. But now, the crescendo of mass layoffs in recent months act as a forcing function[1] for retirement. Even those who aren't directly impacted are saving and investing more money to hedge against the uncertainty and the prospect of future layoffs.
The combination of job insecurity and high investment returns have pushed FIRE back into relevancy—though this time, with more variety. The core calculation remains the "4% rule," a principle that money invested in the broad US stock market can sustain for at least 30 years, modeled on historical data, if you withdraw only 4% annually from your portfolio[2].
But there are only so many ways to reframe the same simple math equation. The community started to segment, carving out niches that speak less to the mathematics and more to the implications in lifestyle based on the withdrawal amounts.
Ways to Retire Early
Let's first establish the baseline. The median US household income was $80k in 2024. To sustain that level of spending in retirement, you'd have to save $80k ÷ 4% = $2mm. This would be considered vanilla FIRE—even though the number in isolation looks daunting[3].
From here, the savings needed—and thus the lifestyles associated with expected annual spending—inspired a few variations. LeanFIRE is something like $1 million or less, with the implication that frugal living is acceptable if it means fewer years of work. FatFIRE is the opposite, $5mm or more, to avoid compromising on retirement spending with a hefty bankroll[4].
Separately, influencers started to craft strategies with milestones that operate more like semi-retirement. CoastFIRE is saving enough early, and letting retirement accounts compound, so you can coast at work and opt out of climbing the corporate ladder. BaristaFIRE and FlamingoFIRE are similar, with the caveat of requiring a bit more in savings, so you can downshift in career development and take a lower-paying job for supplemental income[5]. GeoFIRE looks to arbitrage location, moving to low cost-of-living countries to stretch your portfolio.
The Best Laid Plans
Yet, even with all the slicing and dicing of run rates and investment reserves, the underlying problem remains: all the planning and financial calculations assume that people know what their lives will look like 20, 30, and—in the case of early retirement—50 years later.
Naturally, the youngest aspiring retirees are drawn to the most precarious variants of FIRE; they haven't had as many years to build up their savings. Minimalist strategies like GeoFIRE and LeanFIRE take less money to kickstart, so they are the most attractive to those in their 30s and early 40s. But those are also precisely the years when career incomes peak, and a series of major life decisions—aging parents, marriage, children, divorces, etc.—are potentially still ahead. Someone who has trimmed their monthly spending to $4k/month in their late 20s probably isn't considering how childcare costs, a decade later, would blow up their carefully calibrated budget.
The irony, or perhaps the latent truth, is the personal finance influencers who are pitching FIRE and its myriad of variants aren't themselves retiring. It echoes the fundamental contradiction in self-improvement expertise—the goal is to sell the idea, not necessarily attest to its efficacy. If retirement planning was as straightforward and as automatic as FIRE adherents would claim, they wouldn't need to hustle for articles and podcasts and books to generate income. Successful retirees would…well, retire, and not ask for likes and subscribes.
Pop-Culture Financial Literacy
But even if FIRE and its broad umbrella of derivatives are more marketing than strategy, I still credit the movement for providing the energy and the vocabulary to make personal finance less intimidating.
The field has been gated by expensive financial advisers and brokerages with minimum investment thresholds, so seeing a feed of YouTube videos explaining the 4% rule is democratizing, in the best sense of the word. Communities like the FI subreddit are accessible and provide additional resources, calculators, and guides.
So even with all the pitfalls and caveats and the wonkiness at the extremes, the overall discussion is cheerfully open and promotes financial literacy. In its current incarnation, I am a fan of WellInformedFIRE.
In a few rare cases, companies are even more explicit, offering voluntary buyouts to tenured employees for a mutually amicable departure. ↩︎
William P. Bengen, the financial adviser who originally did the analysis 30 years ago that gave rise to the 4% rule, has recently released a book that clarifies his math. He provides a better set of calculations, and concludes that a safe withdrawal rate should actually be around 4.6–4.7%. ↩︎
For comparison, the median amount saved for retirement, surveyed in 2026, does not exceed $200k for any age group. ↩︎
A couple of folks have aimed for financial gluttony beyond fat, into ObeseFIRE. Yes, the movement can often get silly. ↩︎
You can tell that nerds come up with these schemes, when we think service jobs are low-stress. ↩︎
