fire ~5 min read
Coast FIRE vs Barista FIRE: what's the difference?
Coast FIRE: compounding finishes your retirement fund while you pay your own bills. Barista FIRE: the portfolio pays part of them now. The math, side by side.
Coast FIRE means your portfolio is large enough that compound growth alone will reach your full FIRE number by retirement age — you stop saving, but you still earn every dollar you spend until then. Barista FIRE means the portfolio starts paying part of your bills now, with part-time work covering the rest.
For a household spending $50,000 a year at age 35 (7% real return, retiring at 65): the Coast number is about $164,200; the Barista number with $20,000 of part-time income is $750,000.
Coast FIRE and Barista FIRE are the two most common waypoints between “saving for retirement” and full financial independence, and they get conflated constantly. Both involve continuing to work. Both target a number smaller than your full FIRE number. But they answer different questions, and one of them is usually several times larger than the other.
Coast FIRE in one paragraph
Coast FIRE is the point where your portfolio can finish the job by itself. You’ve invested enough that compound growth — with no further contributions — is expected to carry the balance to your full FIRE number by your chosen retirement age. The formula discounts your full FIRE number back to today: Full FIRE Number ÷ (1 + r)^n, where r is your real return and n is the years until retirement. Reaching it changes nothing about your income needs: you still pay 100% of your living expenses from earned income, and the portfolio sits untouched in the background. What changes is that retirement saving becomes optional. The target shrinks dramatically the younger you are — see Coast FIRE number by age — and you can compute yours in the Coast FIRE Calculator.
Barista FIRE in one paragraph
Barista FIRE is the point where the portfolio can start paying part of your expenses today, while a part-time job covers the rest. Instead of 25× your full annual expenses, you need 25× the gap between expenses and part-time earnings: (Annual Expenses − Part-time Income) × 25 at a 4% withdrawal rate. The name comes from Starbucks baristas, because Starbucks has historically offered health insurance to part-time staff — and in the US, employer health coverage is usually the real reason the part-time job matters, not the paycheck alone. The Barista FIRE Calculator runs the numbers for your own expense gap.
The structural difference
Strip away the labels and the difference is who pays your bills, and when withdrawals start.
Under Coast FIRE, the portfolio finishes the job by itself — but only because nobody touches it. Withdrawals begin at retirement age, not before. Until then, earned income covers all of your spending. Coast is a savings milestone: it ends the obligation to contribute.
Under Barista FIRE, withdrawals begin immediately. The portfolio funds the gap between your spending and your part-time income, every year, starting now. Barista is a withdrawal milestone: it ends the obligation to work full-time.
That single structural difference explains everything else — including why the Barista target is so much bigger. A portfolio that must pay out 4% a year from day one has to be large already; a portfolio that just needs to compound quietly for 30 years can start small.
Side by side
| Coast FIRE | Barista FIRE | |
|---|---|---|
| Question it answers | ”Can I stop saving for retirement?" | "Can I quit full-time work now?” |
| Typical target size | A small fraction of the full FIRE number (about 13% in the example below) | Most of the full FIRE number: 25× the expense gap |
| Who pays your bills today | You do — earned income covers all expenses | Split — withdrawals cover the gap, part-time income covers the rest |
| When paid work ends | At retirement age; until then you earn your full living costs | Full-time work ends now; part-time work continues until full FIRE |
| Healthcare angle | Usually unchanged — a regular job typically keeps employer coverage | Hinges on finding part-time work with benefits; the strategy is named for it |
Worked example: same household, two numbers
Take one household: $50,000 a year in expenses, age 35, retiring at 65, assuming a 7% real return and a 4% withdrawal rate.
The full FIRE number anchors both targets:
Full FIRE Number = $50,000 × 25 = $1,250,000The Coast number discounts that target back 30 years:
Coast Number = $1,250,000 ÷ 1.07³⁰
= $1,250,000 ÷ 7.6123
≈ $164,200The Barista number assumes $20,000 of part-time income, so the portfolio only has to fund the remaining $30,000:
Barista Number = ($50,000 − $20,000) × 25
= $30,000 × 25
= $750,000Same household, same spending — and the Barista target is about 4.6× the Coast target. The work picture differs too: the Coast household keeps earning its full $50,000+ until 65; the Barista household earns $20,000 and withdraws $30,000 a year (a 4% initial withdrawal on $750,000).
One reassuring detail: Barista FIRE doesn’t stall the path to full retirement. In year one, 7% growth on $750,000 is $52,500 against a $30,000 withdrawal, so the balance is still expected to rise. Repeat that arithmetic year by year (balance × 1.07, minus $30,000) and the portfolio crosses the full $1,250,000 in about 14 years — part-time work has an expected end date.
Which comes first? Usually Coast.
Because the Coast target is a fraction of the Barista target, almost any savings path reaches it years earlier. Make the example concrete: suppose this household invests $18,000 a year from zero at the same 7% real return.
- The $164,200 Coast number falls during year 8 — the balance grows from about $155,800 at the end of year 7 to about $184,700 at the end of year 8.
- The $750,000 Barista number falls just after year 20 — about $737,900 at the end of year 20, about $807,600 at the end of year 21.
So the natural sequence runs: Coast first (saving becomes optional), Barista second (full-time work becomes optional), full FIRE last (work becomes optional entirely). Each milestone trades a bigger portfolio for more freedom now. Coast costs the least and changes your cash flow the least; Barista costs several times more and changes your week immediately.
Where these fit in the broader framework — Lean, Standard, and Fat FIRE included — is covered in the full FIRE number guide.
Go deeper:
- How to Calculate Your FIRE Number — the full FIRE number guide, with every variant in one place.
- Coast FIRE number by age — Coast targets at ages 25–45, with the formula and a table.
- What is a FIRE number? — the base figure both milestones are built on.
Run your own inputs in the Coast FIRE Calculator or the Barista FIRE Calculator — both run entirely in your browser, and nothing you type is sent anywhere.
Educational content, not financial advice. Figures assume a 7% real return and a 4% withdrawal rate; your results depend on your inputs, and future returns may differ.