Both strategies swap a high-pressure career for lighter work years before a normal retirement. The difference is what your savings are doing while you do it. In coast FIRE your portfolio is untouched and still growing. In barista FIRE your portfolio is already paying you. Everything else follows from that.
| Coast FIRE | Barista FIRE | |
|---|---|---|
| Your savings | Invested and left alone, compounding toward full retirement | Already funding part of your spending |
| Your work covers | 100% of current expenses, no saving required | The gap between spending and what the portfolio pays |
| You still save | No | No |
| You withdraw | No | Yes, a small amount |
| Typical moment | Mid-career, once the portfolio passes your coast number | Closer to the finish line, once a partial withdrawal is safe |
| Main risk | Returns come in lower than assumed | Losing the part-time income or overshooting the withdrawal |
Say you spend $50,000 a year and have $750,000 invested. A full FIRE number at the 4% rule is $1,250,000.
As coast FIRE: you keep working a job that covers all $50,000, save nothing, and let the $750,000 grow. At a 5% real return it doubles about every 14 years, so it passes $1.5 million in roughly 14 years with no further effort. The catch: you still need to earn your full spending every month, which usually means a real job, not a hobby job.
As barista FIRE: a part-time job paying $20,000 means the portfolio only covers $30,000. Four percent of $750,000 is exactly $30,000, so you can start today. The catch: the plan leans on two things staying true, markets behaving and the part-time income existing.
They are less rivals than rungs on the same ladder. You save hard until the portfolio passes your coast number, then drop the saving pressure and cover expenses only. Years later, once the portfolio has grown enough that a small withdrawal is safe, you trade the full-coverage job for a partial-coverage one: barista. Each step buys back hours of your week, paid for by compounding you no longer touch.
Coast FIRE fits if you like your field but hate the grind of maximizing savings, and you are young enough that compounding has decades to work. Barista FIRE fits if you are close to your number and want out of the career now, and you can find part-time work you do not mind, ideally with health insurance attached. If the thought of needing any paycheck makes you nervous, neither is the goal; that is plain full FIRE, and the calculator for that is here.
The honest summary: coast is safer because nothing is being spent, barista is earlier because something is. Pick which problem you would rather have.
General information, not financial advice. Returns are assumptions, not promises; test your own numbers in the coast FIRE calculator.