# Barista FIRE Calculator > Free Barista FIRE calculator. See how much you need invested before part-time income can cover the rest of your spending, and when you'll get there. Source: https://mycoastfire.com/barista-fire-calculator Last updated: 2026-09-14 See how much you need invested before part-time work can cover the rest of your bills, and how far ahead of full FIRE that puts you. ## How the calculator works Barista FIRE means your portfolio covers part of your spending and part-time work covers the rest. So the target only has to cover the gap between what you spend and what you’ll earn. ``` Barista FIRE number = max(yearly spending − part-time income, 0) ÷ withdrawal rate Full FIRE number = yearly spending ÷ withdrawal rate real return = (1 + expected return) ÷ (1 + inflation) − 1 Every month, starting from what you have invested today: balance = balance × (1 + real return)^(1/12) + monthly contribution ``` The calculator runs that monthly loop twice. The first month your balance reaches the Barista FIRE number is the age you could switch to part-time work. The first month it reaches the full FIRE number is the age you’d be fully independent if you kept working and contributing the whole way. If part-time income covers all of your spending, the Barista number is zero and you’re there today. Part-time income is in today’s dollars, like everything else here, so it’s assumed to rise with inflation. The chart shows your projected balance against both targets. ## A worked example Lena is 36, has $300,000 invested and adds $2,000 a month. She spends about $50,000 a year, and she’s fairly sure she could earn $25,000 a year doing part-time bookkeeping. Her portfolio only has to cover the other $25,000, so her Barista FIRE number at 4% is $625,000. With 7% returns and 3% inflation she gets there at 44. Her full FIRE number is $1,250,000, which she’d reach at 55 if she kept her full-time job and kept saving. That’s roughly 11 years earlier that she could stop working full-time. For someone who likes their field but is worn out by the hours, that gap is the whole appeal. The part-time income assumption carries a lot of weight. If Lena could only count on $15,000 a year, her Barista number would be $875,000 and she’d reach it at 49. ## Why doesn’t Barista FIRE grow into full FIRE? This is the part people get wrong. The two ages the calculator shows are not a sequence you get for free. The full FIRE age assumes you never switched. Once Lena goes part-time at 44, her portfolio stops receiving contributions and starts paying $25,000 a year. At a real return of 3.88%, a year of average growth on $625,000 minus that withdrawal leaves her with $624,272. The portfolio roughly treads water. It won’t compound into $1,250,000 while it’s supporting her. So a Barista FIRE plan needs an exit. The usual one is Social Security, which lowers what the portfolio has to cover once it starts. If Lena switches at 44 and claims at 67, that’s about 23 years of part-time income she’s counting on, which is a longer commitment than it sounds when you’re 36. If you want to model that, the [Coast FIRE calculator with Social Security](https://mycoastfire.com/coast-fire-calculator-with-social-security) shows how guaranteed income changes a target. The other exit is simply keeping some part-time income for a long time, and liking the work enough that it doesn’t feel like a sentence. ## How do I pick my part-time income? Be more conservative than feels necessary. Part-time work tends to get harder to find in exactly the kind of recession that also knocks your portfolio down, and that’s the worst moment to discover your plan relied on both. I’d base the number on work you’ve actually been offered or done, not a job you think should exist. If you’re not sure what that looks like, [our list of jobs that suit Coast and Barista FIRE](https://mycoastfire.com/blog/best-jobs-for-coast-fire) is a reasonable place to start. Then check your spending figure for the costs that change when you leave a full-time job. Health insurance is the big one, and [this post covers what it costs before Medicare](https://mycoastfire.com/blog/coast-fire-health-insurance-before-65). Retirement-account access is the other. Withdrawals from a 401(k) or IRA before 59½ usually carry a [10% additional tax](https://www.irs.gov/taxtopics/tc558), so the money covering your gap should be somewhere you can reach it. ## What the calculator leaves out It assumes steady returns. That matters more for Barista FIRE than for full-time saving, because you start withdrawing years earlier. A 25% drop in your first two years of part-time work means selling while prices are low, and the portfolio may not recover the way it would have if you’d left it alone. It also doesn’t model Social Security, taxes on withdrawals, or part-time income that fades over time. If you want the simpler, lower-risk version of stepping back, where the portfolio isn’t touched at all until retirement, compare your numbers with the [Coast FIRE calculator](https://mycoastfire.com/). ## Questions people ask ### What counts as part-time income? Anything you'd reliably earn after stepping back from full-time work: a part-time job, freelancing, consulting for your old employer, seasonal work. Use what you'd take home, and make sure your spending figure includes any taxes you'll owe on portfolio withdrawals. ### Will Barista FIRE turn into full FIRE on its own? Not by itself. Once you switch, the portfolio is paying part of your bills, so it isn't compounding untouched anymore. Plan on keeping some income until Social Security starts, or keep saving full-time until you're closer to your full number. ### What about health insurance? It's the line most Barista FIRE budgets miss. Some employers offer benefits to part-time staff. If yours won't, price marketplace coverage into your yearly spending before you give notice. ### Is Barista FIRE the same as Coast FIRE? No. With Coast FIRE your job still pays all of today's bills and your investments grow untouched. With Barista FIRE the portfolio pays part of them now. Our comparison page runs the same person through both. ## Keep reading - [Coast FIRE vs. Barista FIRESame person, two plans, real numbers.](https://mycoastfire.com/coast-fire-vs-barista-fire) - [Best jobs for Coast FIREPart-time and lower-stress work that pays the bills.](https://mycoastfire.com/blog/best-jobs-for-coast-fire) - [Health insurance before 65The cost most early retirement budgets miss.](https://mycoastfire.com/blog/coast-fire-health-insurance-before-65) - [FIRE calculatorThe full number, with no part-time income.](https://mycoastfire.com/fire-calculator)