Finance · retirement & planning
Find the smaller corpus you need when part-time income covers part of your expenses — with a full-FIRE comparison and the exact gap to reaching it.
Formula shown · assumptions stated.
Barista FIRE lets part-time work fund part of your expenses. Enter your annual expenses, expected part-time income, withdrawal rate, and what you already have invested — the calculator finds the smaller corpus needed and the exact gap to reaching it.
Total yearly spending in retirement.
Income you expect to keep earning each year.
Annual withdrawal rate assumed.
What you already have invested today.
Barista FIRE Number
$750,000
Corpus needed once part-time income covers part of expenses.
Formula verified 25 August 2026
Gap to Your Barista FIRE Number
$450,000
Still needed before part-time work can carry the rest.
Full FIRE Number
$1,250,000
No part-time income.
Corpus Saved
$500,000
Vs. full FIRE.
Barista FIRE funds only the gap between your expenses and your part-time income, not your full expenses.
Spending gap
Gap = Annual Expenses − Part-Time IncomeFloored at zero.
Barista FIRE number
Barista Number = Gap ÷ Safe Withdrawal RateCorpus needed with part-time income.
Gap to Barista FIRE
Gap = Barista Number − Current InvestedPositive = still needed. Zero or negative = already there.
$50,000 annual expenses, $20,000 part-time income, a 4% withdrawal rate, and $300,000 already invested.
With $20,000 of part-time income, this saver needs a $750,000 corpus instead of $1,250,000 for full FIRE — $500,000 less. With $300,000 already invested, they still need about $450,000 more before Barista FIRE is within reach. A common mistake is overestimating reliable part-time income; if that work stops, the portfolio must cover the full gap, so build in a margin.
This calculator estimates the corpus you need when part-time income covers part of your spending. Because the portfolio funds only the gap between expenses and earnings, it can be smaller than the one full financial independence would demand. It returns your Barista FIRE number alongside the full FIRE figure, the gap to what you already have invested, and how much smaller corpus part-time work buys you.
First find the spending gap: annual expenses minus part-time income. Then divide that gap by your safe withdrawal rate as a decimal. Dividing by the rate is the same as multiplying by its inverse — at 4% you need 25 times the gap, the same 25x shorthand that Corporate Finance Institute ties to the four percent rule. Shrink the gap with earnings and the required corpus shrinks with it. That 4% figure is a guideline, not a guaranteed safe level, so treat the result as a target rather than a promise.
With $50,000 of expenses and $20,000 of part-time income, the gap is $30,000. At a 4% withdrawal rate the Barista FIRE number is $30,000 ÷ 0.04 = $750,000. Full FIRE for the same $50,000 of expenses would be $1,250,000 — so part-time work cuts the required corpus by $500,000. With $300,000 already invested, this saver still needs about $450,000 more before Barista FIRE is within reach.
The calculator compares the Barista FIRE number with what you already have invested and shows the gap directly. At or above the Barista FIRE number, the result reads as a surplus — the combination of your portfolio and part-time earnings is projected to sustain your lifestyle already. Below it, the gap is exactly how much more you need.
The biggest mistake is overestimating part-time income or assuming it never stops. If the work ends, the smaller corpus may not cover full expenses, and the safety the plan implied disappears. Savers also ignore tax on earnings, forget that expenses rise with inflation, and overlook benefits like health coverage that can be tied to the job.
Barista FIRE suits people who enjoy some work, want a softer transition out of full-time jobs, or value the benefits part-time roles bring. It pairs well with a Coast FIRE Calculator, a full Retirement Calculator for the full-FIRE comparison, and a Retirement Withdrawal Calculator to check the portion the portfolio actually funds.
Barista FIRE is a semi-retired approach where part-time work covers some expenses, so your portfolio only needs to fund the rest. That lets you reach financial independence with a smaller corpus than full FIRE.
Subtract your part-time income from your annual expenses to find the gap, then divide the gap by your withdrawal rate. With $50,000 expenses, $20,000 income, and a 4% rate, that is $30,000 / 0.04 = $750,000.
Barista FIRE uses part-time income to shrink the corpus you need now. Coast FIRE means you have enough invested to grow into your target by retirement without new contributions, while still covering current costs from work.
Because part-time income covers part of your spending, the portfolio funds only the remaining gap. A smaller funded gap means a smaller required corpus at the same withdrawal rate.
Compare your current invested amount with the Barista FIRE number. If what you already have invested is equal to or above that number, the calculator shows a surplus instead of a gap — you’ve technically already reached Barista FIRE.
Then your portfolio would need to cover the full expense gap, which the smaller corpus may not support. Many people keep a buffer or plan a path to full FIRE in case the income ends.
It can. Earned income may be taxed, and in some places it affects access to benefits or subsidized health coverage. These vary by country, so check your situation; this calculator does not model them.
A 4% rate is a common starting point, but it is a guideline, not a guarantee. A lower rate is more conservative and raises the corpus needed; a higher rate lowers it but increases depletion risk.
The four percent rule behind FIRE corpus targets, and general diversification guidance, come from these publishers.
Finance disclaimer
This Barista FIRE calculator is for educational and general reference use only. It is not financial, investment, tax, retirement, or legal advice. Investment returns are not guaranteed and depend on market conditions, fees, taxes, inflation, timing, and individual circumstances. Verify important decisions with qualified professionals.
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Published 25 August 2026