Coast FIRE and Barista FIRE

The FIRE community has an all-or-nothing problem.

Read enough Reddit threads and blog posts and you’ll come away with a single narrative: save 25 times your spending, invest it all in index funds, quit your job, never work again. Hit the number or keep grinding. Binary. Clean. And for a lot of people, paralyzing.

A 28-year-old earning $55,000 does the math, sees a $1,000,000 target, and thinks: “That’s 20 years away at best. I can’t think about decades right now.” So they close the spreadsheet and go back to whatever they were doing. The all-or-nothing framing lost someone who could have benefited from the underlying idea.

Coast FIRE and Barista FIRE fix this. They take the same math and ask a different question. Not “when can I quit?” but “when can I downshift?” When can I stop prioritizing income and start prioritizing how I spend my days? The answer, for many people, comes decades sooner than full FIRE.

Coast FIRE

Coast FIRE rests on one insight: compound growth does the heavy lifting if you give it enough time.

If you invest aggressively in your twenties and early thirties, there’s a point where the money you’ve already saved will grow to your retirement target on its own. No additional contributions needed. Once you cross that threshold, the only financial requirement of your job is covering current expenses. Not saving. Not investing. Just paying the bills.

That changes what “job” means. You don’t need the high-paying, high-stress career anymore. You need something that covers rent, food, and insurance. A lower-paying job you enjoy. A part-time arrangement. A career switch to something that interests you but doesn’t pay well. The pressure to maximize income evaporates because the future is already funded.

The term “coast” captures the feeling: you’ve pedaled hard up the hill, and now you’re coasting down the other side.

The Math

Your Coast FIRE number is the amount you need invested today so that compound growth alone reaches your retirement target by a specific age.

Coast FIRE number = Retirement target / (1 + real return rate) ^ years until retirement age

Most Coast FIRE calculations use 7% as the growth rate, which reflects the long-term average nominal return of U.S. equities. This means the retirement target should also be in future (nominal) dollars. For simplicity, we’ll work in today’s dollars throughout and use a more conservative 6% real return (after inflation). The math works either way; just don’t mix the two.

Here’s what this looks like for someone targeting $40,000 per year in retirement spending, which requires a $1,000,000 portfolio at a 4% withdrawal rate:

Current Age	Years to 65	Coast FIRE Number
25	40	$97,200
28	37	$115,800
30	35	$130,100
32	33	$146,200
35	30	$174,100
40	25	$233,000

Assumes 6% real (after-inflation) return, $1,000,000 target at age 65.

A 25-year-old with $97,000 invested in index funds has already reached Coast FIRE for a $40,000-per-year retirement. They never need to invest another dollar. They just need a job that covers their expenses for the next 40 years, and compound growth handles the rest.

“Covers your expenses” is doing work in that sentence. If you’re spending $35,000 a year, you need a job that pays at least that much after taxes. That’s not nothing. But it’s a different requirement than “earn enough to save aggressively while also covering a family’s expenses in a high-cost city.”

One important caveat on the math: 6% real assumes the long-term average holds over your specific decades. A prolonged downturn early in the coast period can push your actual arrival past 65. The fix is simple. Don’t treat Coast FIRE as a vow to never invest again. Check in every few years, and if your portfolio is behind the curve, contribute some more.

A Worked Example

Take someone who’s 30, has $170,000 invested, and spends $36,000 per year.

Their full FIRE target is $36,000 × 25 = $900,000. At a 30% savings rate on a $52,000 income, they’re investing about $15,600 per year. Getting from $170,000 to $900,000 at 6% real return with $15,600 in annual contributions takes roughly 18 more years. Full FIRE at 48.

Now check the Coast FIRE math. $170,000 at 6% real return for 35 years (to age 65) grows to roughly $1,307,000. That’s well above the $900,000 target. This person has already passed their Coast FIRE number.

They could stop investing entirely, take a job that pays $36,000 (or less, if they move somewhere cheaper or share expenses differently), and know their retirement is funded. They could switch from software engineering to teaching. From corporate law to working at a national park. From management to individual contributor. The only constraint is covering current expenses.

Full FIRE at 48. Coast FIRE: right now.

What If You’re Not There Yet?

Most people reading this haven’t hit their Coast FIRE number. That’s fine. The calculation still tells you something useful.

Say you’re 32, have $80,000 invested, and spend $42,000 per year. Your retirement target is $42,000 × 25 = $1,050,000. The Coast FIRE number for a 32-year-old targeting $1,050,000 at 6% real return is roughly $153,500. You’re about $73,500 short.

At a 22% savings rate on a $68,000 income (roughly $15,000 per year in contributions), that $80,000 grows to $153,500 in about 4 years. By 36, compound growth alone handles the rest. Full FIRE might be 25 years away. But the point where you no longer need to save aggressively is four years out.

That changes the next four years from “I’m grinding toward a million-dollar number I can barely imagine” to “I’m closing a $73,500 gap, and then the pressure comes off.” Same math. Different framing. Much more motivating.

Barista FIRE

Barista FIRE lets you leave your career now by combining portfolio withdrawals with part-time work to cover the gap.

The name comes from the idea of working part-time at a coffee shop. Not because you need the career, but because you want some structure, social connection, and health insurance while your portfolio handles most of the weight. The “barista” part is metaphorical. Contract work at $80/hour for 10 hours a week uses the same math as coffee shop shifts. The strategy works for anyone whose bridge income can fill the gap between portfolio withdrawals and living expenses.

The math: take 4% of your portfolio as annual income, then earn the rest from work.

Say you’re 42, you have $650,000 invested, and you spend $48,000 per year. A 4% withdrawal gives you $26,000. You need to earn $22,000 to close the gap.

$22,000 a year is $1,833 a month. That’s a part-time job at $18/hour for about 24 hours a week.

But Barista FIRE has a benefit that doesn’t show up in the withdrawal math: employer-provided health insurance. For an American family, buying health coverage on the ACA marketplace runs $12,000 to $20,000 per year depending on income and state. Several large employers offer health benefits to part-time workers. Starbucks requires 20 hours per week. Costco requires 24. UPS and REI have similar programs.

A Barista FIRE person earning $22,000 part-time and receiving $15,000 in health insurance benefits is getting $37,000 in total compensation for 24 hours of weekly work. Combined with $26,000 from the portfolio, that’s $63,000 in total income and benefits without touching principal.

One caveat on the insurance angle: employer benefit policies change. Starbucks has modified its part-time eligibility multiple times over the past decade. If your entire Barista FIRE plan depends on one employer’s benefits, diversify your options before you quit your day job.

The Real Advantage

Both strategies share something the standard FIRE narrative misses: most people don’t actually want to stop working entirely.

The FIRE community spends enormous energy debating the Retire Early part. Blog posts about quitting at 35. Reddit threads on whether freelancing counts as “retired.” Arguments about whether you’re a fraud if you earn money after hitting your number. None of it matters.

The FI matters more than the RE. Having good work is a genuine blessing. Bad work situations are what destroy people.

Coast FIRE and Barista FIRE make this concrete. You don’t need to amass 25 times your spending before your career gets better. You need enough invested that the future takes care of itself (Coast) or enough that a simpler job fills the gap (Barista). Both thresholds arrive years or decades before full FIRE.

A 30-year-old who reaches Coast FIRE can switch from a $120,000 job they hate to a $50,000 job they love and know their retirement is on track. A 42-year-old who reaches Barista FIRE can leave management, work part-time at a garden center, and cover their bills.

Where This Breaks

Both strategies assume your spending stays predictable. Kids, medical events, divorce, or a parent who needs care can blow up a carefully calculated budget. The same caveat applies to full FIRE, but people pursuing Coast or Barista FIRE often have less margin because they’ve deliberately chosen lower incomes. Of all the risks on this page, spending volatility is the hardest to hedge. You can check in on portfolio growth. You can diversify your benefits options. You can’t predict a medical crisis.

The other risk is psychological. Some people who downshift find they miss the identity, structure, and ambition that came with a demanding career. Trading a VP title for part-time hours sounds great in theory. The transition is harder than the math, and When to Pull the Trigger spends more time on this.

Doing the Calculation

None of these risks erase the value of knowing your number. Figure out where you stand in five minutes.

For Coast FIRE:

Determine your annual spending in retirement (use today’s spending as a starting point)
Multiply by 25 to get your retirement target
Check your current invested balance (retirement accounts plus taxable investments)
Run a compound growth calculation: does your current balance, grown at 6% per year for the years until your target retirement age, exceed your target?

If it does, you’ve reached Coast FIRE. Every dollar you invest from here speeds up the timeline but isn’t required.

Count everything: 401(k), IRA, Roth IRA, HSA, taxable brokerage. Yes, retirement accounts have access restrictions before 59½, but for Coast FIRE the money doesn’t need to be accessible until traditional retirement age. That’s the whole point.

For Barista FIRE:

Take 4% of your current portfolio. That’s your annual investment income.
Subtract from your annual spending. That’s the gap.
Divide the gap by 12. That’s how much monthly income you need from work.
Ask yourself: can I earn that from a job I’d enjoy?

If the answer is yes, you’re Barista FIRE ready.

What’s Next

Coast FIRE and Barista FIRE reframe the timeline. But knowing you could downshift and actually doing it are different problems. The math might be ready while you aren’t.

When to Pull the Trigger covers the decision itself: how to know when you’re financially ready, emotionally ready, and what the first year actually looks like.