Is 4% safe for a retirement that could run 40 years?
The 4% rule was tested on 30-year retirements. At a more conservative 3.5%, the spending-only target rises from $1,375,000 to $1,571,429.
Is the 4% rule still safe? →Barista FIRE Calculator
Barista FIRE is semi-retirement: part-time income (and often employer healthcare) covers part of your spending, so you need a smaller portfolio than full FIRE. Add your expected part-time income to see how much it lowers the number you need.
Start from a scenario
Your numbers
Essentials
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Advanced assumptions
After-tax value assumptions15% on gains
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Planning estimate, not a tax bracket calculation
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Applied only to gains above cost basis
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Contributions already taxed; gains above this may be taxable
Market assumptions7% return · 3% inflation · 4% withdrawal
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Healthcare & part-time income (optional)
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Optional — ACA estimate ~$12,000/yr before subsidies
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Optional — semi-retirement income per year
Your result
Your Barista FIRE number
$889,738
With $25,000/yr of part-time income covering part of your $55,000 spending, your portfolio target falls from $1,514,738 to $889,738 — about $625,000 less than full FIRE.
$55,000/yr spending · 4% withdrawal rate · 7% return · 3% inflation · 20-year runway.
Your path to Barista FIRE
At your current pace, you reach Barista FIRE around age 61 — about 31 years from now, earlier than full FIRE because part-time income covers part of your spending. Projected portfolio vs your Barista FIRE target in today's dollars.
The required portfolio changes by retirement age because pre-Medicare healthcare costs shrink as you get closer to age 65.
Keep building past Barista FIRE and the same plan reaches full FIRE around age 74 — the point where you wouldn’t need the part-time income at all.
FIRE vs Coast FIRE vs Barista FIRE
Three milestones on the path to financial independence, for your inputs.
Full FIRE
$1,514,738
Today's dollars
Portfolio that funds $55,000/yr at a 4% withdrawal rate — work becomes optional.
Coast FIRE
$706,979
After-tax amount needed today
After-tax amount invested today that grows into your FIRE number by age 50 with no more contributions.
Barista FIRE
$889,738
Today's dollars
Smaller portfolio because $25,000/yr of part-time income covers part of your spending.
Gross vs spendable (future dollars at age 50): projected gross portfolio is $954,789; estimated after-tax spendable value is $873,070. The FIRE date uses spendable value.
Not sure which path fits you? Read the full comparison: Regular vs Coast vs Barista FIRE.
Assumptions:Return 7% nominalInflation 3%Withdrawal rate 4%Monthly contributions, end-of-monthToday's dollars
Educational estimate only — each chip opens the formula and source behind it. What this model does not know.
Based on your inputs
Saving more is your biggest lever
Of the inputs you control, adding $500/mo to your contributions moves your FIRE date the most — about 6 years earlier, under these assumptions.
See every lever side by side →What changes your FIRE date
Each row tweaks one lever from your plan so you can see which moves the needle most.
| Scenario | FIRE number | Years to FIRE | FIRE age |
|---|---|---|---|
| Your plan | $1,514,738 | 44 yrs | 74 |
| +$500/mo contributions | $1,514,738 | 38 yrs | 68 |
| Spend $10k/yr less | $1,264,738 | 39 yrs | 69 |
| 1% lower return | $1,523,364 | 54 yrs | 84 |
| 3.5% withdrawal rate | $1,711,167 | 47 yrs | 77 |
Based on your inputs
What to check next
Questions your current numbers raise — each with the figure that makes it worth asking. Educational estimates under this page's assumptions, not recommendations.
What carries you before Social Security can even begin?
Benefits can't start until at least 62 — your portfolio funds 100% of spending for the first 12 years, about $660,000 at today's spending.
Read the Social Security bridge strategy →Which input moves your plan the most?
Cutting spending 10% alone lowers your spending-only target by about $137,500 — compare every lever side by side.
Open the sensitivity table →How part-time income reduces your portfolio need
The logic: portfolio need = spending not covered by part-time income ÷ withdrawal rate. With $25,000/yr of part-time income, your target falls to $889,738 — compared with $1,514,738 for full FIRE.
Barista FIRE lowers the portfolio target, but it adds risk that the formula doesn't capture:
- Income risk — part-time income can vary or stop; the plan assumes it continues every year.
- Healthcare risk — if your part-time job doesn't offer benefits, factor a healthcare estimate into your spending.
- Job-availability risk — part-time or flexible work isn't guaranteed to be there when you need it.
Worth101 Research
FIRE trade-offs and retirement realities
Barista FIRE changes the math by covering part of your spending. These charts recalculate from your current inputs.
1) Part-time income buys down your FIRE number
Full FIRE on $55,000/yr of spending needs about $1,514,738. Covering part of that with $25,000/yr of part-time income lowers the portfolio you need to about $889,738 — roughly $625,000 less to save.
Portfolio needed = (spending − part-time income) ÷ 4% withdrawal rate, plus the pre-Medicare healthcare bridge.
▼ Read analysis: why does this happen?▾
Why it works: Barista FIRE only asks your portfolio to cover the gap between spending and part-time earnings. The smaller that gap, the smaller the multiple of it you need invested.
The catch: the plan depends on staying employable and, often, on employer healthcare — model the income conservatively and keep a buffer for years you can't or don't want to work.
2) How long does the part-time income really last?
Your Barista target of $889,738 assumes the $25,000/yr continues every year. If it stopped after 5 years, the portfolio you'd have needed at retirement is about $1,406,330 — $516,591 more. The full-FIRE bar ($1,514,738) is what the plan needs if the income never materialises.
Stress test using the documented durability formula (see methodology) in today's dollars — illustrative, not a job-market prediction.
▼ Read analysis: why does this happen?▾
Why durability matters: every year the income lasts, it covers $25,000 of spending your portfolio doesn't have to. When it stops, your target snaps back toward the full-FIRE number — discounted only by the years of breathing room you got.
The defence: model the income conservatively (shorter and smaller than you hope), keep employability current, and treat employer healthcare as part of the income's value.
3) Healthcare before Medicare is the hidden variable
Your perpetual-spending target is about $1,375,000. Retiring at 50 — before Medicare at 65 — adds a present-value healthcare bridge of $139,738, lifting your full FIRE number to $1,514,738.
Both figures are in today's dollars. The bridge ends at age 65 when Medicare generally begins; employer or part-time coverage can shrink it.
▼ Read analysis: why does this happen?▾
Why it's finite: unlike spending, the healthcare bridge only runs from your retirement age to 65, so it's modelled as a present-value lump rather than a perpetual cost — which is why it can be smaller than people fear.
How to lower it: ACA premium tax credits (income-based), part-time employer coverage, or a spouse's plan can all reduce the out-of-pocket estimate you enter.
How Barista FIRE changes your FIRE number
Barista FIRE means part-time income covers part of your spending in semi-retirement, so you need a smaller portfolio. With $25,000/yr of part-time income, your portfolio target falls to $889,738, compared with $1,514,738 for full FIRE.
Full FIRE means your portfolio can fund your spending indefinitely. At a 4% safe withdrawal rate, the perpetual-spending portion of your FIRE number is your annual spending times 25 — so $55,000 of spending implies $1,375,000, plus a $139,738 pre-Medicare healthcare bridge, for a total FIRE number of $1,514,738.
Coast FIRE is reached earlier: once your invested savings are large enough to compound into your full FIRE number by your target age, you can stop saving for retirement entirely and just cover current expenses.
The 4% rule and your FIRE number
Barista FIRE applies the same rule to a smaller gap: only the spending your $25,000/yr part-time income doesn't cover gets multiplied by 25×.
FIRE number = Annual spending ÷ Safe withdrawal rate
The 4% rule comes from the Trinity Study: historically, withdrawing about 4% of your starting portfolio each year (adjusted for inflation) survived a 30-year retirement in nearly all market scenarios. Dividing by 4% is the same as multiplying spending by 25.
A more conservative 3.5% rate raises the bar (multiplying spending by ~29) and is worth modeling if you retire very early or want extra safety margin. Try it in the sensitivity table, or use the Safe Withdrawal Rate calculator to compare rates side by side.
Where to hold FIRE savings (2026 US limits)
For Barista FIRE, part-time income may reduce withdrawals, but it does not eliminate the need for tax-aware account placement — your contributions currently route into a Taxable / brokerage account.
- Roth IRA — up to $7,500/year ($8,600 if 50+). After-tax in, tax-free growth and qualified withdrawals — ideal for early-retirement flexibility.
- 401(k) — up to $24,500/year ($32,500 if 50+). Pre-tax growth; capture any employer match first. Early withdrawals need a Roth conversion ladder or 72(t).
- Taxable brokerage — no cap and no early-withdrawal penalty, which makes it the bridge that funds the years before 59½. Gains are taxed as you realize them.
These are 2026 contribution limits, not tax advice. The calculator routes your inputs into the account type you choose. Verify current limits in the IRS 2026 announcement.
Healthcare before Medicare
Barista FIRE often pairs part-time work with employer healthcare, which can lower or eliminate this cost — enter your expected out-of-pocket estimate either way. Right now you budget $12,000/yr, a $139,738 present-value bridge.
If you retire before 65 you bridge the gap to Medicare yourself — usually an ACA Marketplace plan, often around $12,000/year before ACA subsidies. Add your estimate in the calculator and it is modeled as a finite bridge ending when Medicare generally begins at age 65. Subsidies are income-based — many early retirees pay far less than the sticker price.
Barista FIRE Calculator FAQ
What is Barista FIRE?▼
Barista FIRE is semi-retirement: you leave your high-stress career but keep part-time or lower-paying work (the name comes from a coffee-shop job that offers health insurance). Part-time income covers some of your spending, so you need a smaller portfolio than full FIRE.
How is the Barista FIRE number calculated?▼
Subtract your expected part-time income from your annual spending, then divide the remainder by your safe withdrawal rate. If you spend $50,000 and earn $20,000 part-time, your portfolio only has to cover $30,000 — about $750,000 at 4% instead of $1,250,000. If you have pre-Medicare healthcare costs, the same finite healthcare bridge used for full FIRE is added on top of that figure.
Why does employer healthcare matter for Barista FIRE?▼
Health insurance before age 65 is one of the biggest early-retirement costs. A part-time job that includes employer health coverage can be worth far more than its wage, because it removes the pre-Medicare healthcare line from your FIRE number.
Is Barista FIRE riskier than full FIRE?▼
It depends on the job. Barista FIRE assumes you can keep earning the part-time income; if that work disappears, your portfolio has to absorb more spending. Many people treat it as a bridge to full FIRE rather than a permanent state.
Can I switch from Barista FIRE to full FIRE later?▼
Yes. While you cover part of your spending with part-time work, your investments keep compounding. Use the calculator to see the age your portfolio reaches your full FIRE number, at which point the part-time income becomes optional.
How these numbers work: the FIRE number is your annual spending (plus any pre-Medicare healthcare you enter) divided by your safe withdrawal rate, shown in today’s dollars. Projections assume a fixed annual return and inflation rate — deterministic, not a market-volatility simulation, and not financial advice. Read the full methodology, assumptions & sources →
New to compounding? The compound interest calculator shows the growth math behind every FIRE projection.
Sources cited
- IRSIRS — 2026 retirement contribution limitsOfficial 2026 401(k), IRA, Roth IRA, and catch-up contribution limits.
- CMSMedicare.gov — Get started with MedicareOfficial Medicare eligibility and enrollment guidance.
- SSASSA — Delayed retirement creditsOfficial Social Security guidance on delaying retirement benefits.
- BLSBLS Consumer Price IndexUS Bureau of Labor Statistics inflation data.
- IRSIRS Publication 590-B (Roth IRA distributions)IRS guidance on Roth IRA tax treatment and required minimum distributions.