How to Calculate Your Coast FIRE Number
Find the portfolio balance where your money grows to your FIRE number without new contributions.
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Finance & Investment
Barista FIRE Calculator 2026
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Financial Disclaimer: This calculator is for informational purposes only. It is not financial advice. Consult a licensed financial advisor before making semi-retirement or investment decisions.
How to Calculate Your Barista FIRE Number
Your Barista FIRE number is smaller than full FIRE because your portfolio only needs to fund the portion of expenses that part-time income does not cover. Two inputs drive the math: the annual expense gap and your chosen withdrawal rate.
Portfolio gap = Annual Expenses - (Monthly Part-Time Income x 12)
Barista FIRE # = Portfolio Gap / Withdrawal Rate
Full FIRE # = Annual Expenses / Withdrawal Rate (larger)
Barista FIRE # = Portfolio Gap / Withdrawal Rate
Full FIRE # = Annual Expenses / Withdrawal Rate (larger)
With a 4% withdrawal rate, every $1,000/month in part-time income reduces your Barista FIRE number by $300,000. Even a modest income stream has an outsized impact. Jordan spends $60,000/year and plans to work part-time earning $2,500/month ($30,000/year) as a freelance consultant, with $180,000 saved and $22,000/year in contributions at 7% return:
Annual expenses$60,000
Annual part-time income ($2,500 x 12)$30,000
Portfolio gap ($60k - $30k)$30,000/yr
Barista FIRE number ($30,000 / 4%)$750,000
Full FIRE number ($60,000 / 4%)$1,500,000
Current savings$180,000
Years to Barista FIRE at $22k/yr contributions~14 years
Jordan needs only half the portfolio that full FIRE would require, potentially shaving a decade off the timeline to leaving full-time work. For the full FIRE equivalent, see the Coast FIRE Calculator to see how long your portfolio can grow on its own.
What Is Barista FIRE?
Barista FIRE is a form of semi-retirement where you leave a high-stress full-time career and replace it with part-time work at a lower-pressure job. Your investment portfolio covers the remaining gap between your earnings and expenses. The concept originated in the FIRE community from the idea of working at a Starbucks or similar employer that offers health insurance to part-time staff, solving the health coverage problem that stops many early retirees.
The portfolio reduction effect of part-time income is substantial. The table below shows how much your Barista FIRE number drops at 4% withdrawal for every $1,000/month in earned income, versus the baseline full FIRE number at $60,000/year expenses:
| Monthly Part-Time Income | Annual Income | FIRE Number (4%) | Reduction vs Full FIRE |
|---|---|---|---|
| $0 (Full FIRE) | $0 | $1,500,000 | -- |
| $1,000/mo | $12,000 | $1,200,000 | -$300,000 |
| $2,000/mo | $24,000 | $900,000 | -$600,000 |
| $3,000/mo | $36,000 | $600,000 | -$900,000 |
| $4,000/mo | $48,000 | $300,000 | -$1,200,000 |
| $5,000/mo | $60,000 | $0 | -$1,500,000 |
Barista FIRE vs Coast FIRE
Both Barista FIRE and Coast FIRE let you stop full-time work before traditional retirement age, but the mechanics differ. Barista FIRE relies on ongoing part-time income to reduce the portfolio requirement now. Coast FIRE relies on portfolio growth over time, with no earned income required. The right choice depends on whether you want to stop working entirely sooner, or transition to part-time work sooner. Use the Savings Duration Calculator to model how long a given portfolio balance would last at various withdrawal rates.
| Attribute | Barista FIRE | Coast FIRE |
|---|---|---|
| Part-time work required | Yes, ongoing | No (optional) |
| Portfolio must cover | Expense gap after income | Full FIRE number eventually |
| Stop making contributions | Yes | Yes (earlier) |
| Health insurance source | Employer or ACA | ACA or out of pocket |
| Key risk | Income loss or reduction | Market growth shortfall |
| Best fits | Those who enjoy lower-stress work | Those who want to stop saving now |
Barista FIRE Jobs: What Part-Time Work Qualifies?
The original Barista FIRE concept centered on jobs that offer employer health insurance at part-time hours. Today the model is broader: any reliable part-time income source reduces your required portfolio. The table below covers common choices with approximate income ranges and health benefit eligibility:
| Job | Hours | Health Insurance | Monthly Pay Range |
|---|---|---|---|
| Starbucks barista | 20+ hrs/wk | Yes (20+ hrs) | $1,400-$2,200 |
| Costco warehouse | 24+ hrs/wk | Yes (24+ hrs) | $1,800-$2,800 |
| REI retail | 20+ hrs/wk | Yes (20+ hrs) | $1,400-$2,000 |
| UPS package handler | Part-time | Yes | $1,600-$2,400 |
| Library assistant | Part-time | Public sector | $1,600-$2,400 |
| Adjunct instructor | Per course | Usually no | $2,000-$4,500 |
| Remote customer service | Flexible | Sometimes | $1,400-$2,000 |
| Freelance consulting | Project-based | No | Varies widely |
Workers whose reduced part-time income brings them below ACA subsidy thresholds ($21,870 for an individual in 2025) may qualify for significant premium tax credits, making employer health insurance unnecessary.
Common Mistakes to Avoid
Overestimating part-time income reliability
Part-time jobs can be cut, hours reduced, or the work may become unavailable. Model your Barista FIRE number using a conservative income estimate, or run a scenario with zero part-time income to understand the worst-case portfolio requirement.
Forgetting health insurance in expense estimates
Health insurance is often the biggest expense jump when leaving full employment. A plan that costs nothing from your employer paycheck may cost $500 to $900/month on the ACA marketplace. Build this into your annual expenses.
Not accounting for part-time income taxes
Even modest earned income is taxable. If you earn $30,000 part-time, factor in self-employment taxes and federal income tax. Your net income will be lower than the gross figure you enter into the calculator.
Ignoring the portfolio growth opportunity
Because Barista FIRE requires a smaller portfolio, many people reach it while still in prime earning years. Any contributions you make after reaching Barista FIRE accelerate toward full FIRE. Do not stop saving if you can still contribute.
Treating part-time income as permanent
Part-time work may not be sustainable indefinitely due to health, job market changes, or personal preference. Build a plan that works even if part-time income eventually drops to zero, either through a larger portfolio or a lower expense target.
Frequently Asked Questions
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Sources & References
1
Bengen, W. (1994): Determining Withdrawal Rates Using Historical Data
Journal of Financial Planning. Original source establishing the 4% safe withdrawal rate that forms the basis of the Barista FIRE number calculation.
2
Healthcare.gov: Health Coverage for Part-Time Workers ↗
U.S. Department of Health and Human Services guidance on ACA marketplace coverage options and subsidy eligibility for part-time and self-employed workers.
3
Bureau of Labor Statistics: Employed Persons by Part-Time Status (Table A-8) ↗
BLS monthly household survey data on part-time employment by reason and industry, used to inform realistic income ranges in the Barista FIRE jobs section.
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Hassaan Rasheed
Developer and Researcher, CalculatorFlux
Researches and verifies the formulas, methodology, and source data behind each calculator on CalculatorFlux. All tools are built and checked against the cited references before publication.
Last updated: June 2026