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CoastMath

Barista FIRE Calculator

A free Barista FIRE calculator for people planning financial independence or early retirement in the United States. Free, no signup, runs in your browser. Barista FIRE means leaving full-time work once your investments can cover the part of your spending that part-time or flexible income does not. Enter both to see the smaller target and how far away it is.

Quick answer: Barista FIRE number = (annual spending − part-time income) ÷ withdrawal rate. With $48,000 of spending, $20,000 of part-time income and a 4% rate, you need about $700,000 instead of $1,200,000 for full FIRE.

Default figures are examples. Part-time income is assumed to rise with inflation. Not investment or career advice.

What Barista FIRE means

The name comes from the idea of taking a part-time job — the classic example being a coffee shop that offers benefits to part-time staff — once your investments can cover the rest of your costs. In practice it describes any semi-retirement: freelancing, seasonal work, consulting a few days a month or a lower-stress job. The common thread is that earned income keeps paying part of the bills, so the portfolio can be smaller and you can leave demanding full-time work sooner.

How the calculator works

It divides the spending your part-time income does not cover by your withdrawal rate. That is your Barista FIRE number. It then compares that target with your invested balance and, using your monthly saving and real return, estimates how many months until you reach it. It also shows how much smaller the target is than full FIRE, which is simply part-time income divided by the withdrawal rate: every $1,000 of reliable yearly income lowers the target by $25,000 at a 4% rate.

Using it with Coast FIRE

Barista FIRE and Coast FIRE are often combined. A typical plan is to reach the Barista number, switch to part-time work, let the portfolio keep growing while withdrawals are small, and fully retire later. Because withdrawals during the part-time years are smaller than full FIRE withdrawals, the portfolio has more time to compound. Our Coast FIRE calculator shows whether your current balance could grow to a full FIRE number by a later age on its own.

Health insurance and the real cost of part-time work

For many Americans the deciding factor is health coverage before Medicare eligibility at 65. Options include an employer plan for part-time staff where offered, a spouse’s plan, COBRA continuation for a limited period, or a Marketplace plan, where premium tax credits depend on household income. Lower earned income in Barista FIRE can change your premium tax credit, so estimate it on HealthCare.gov rather than assuming. Read the health insurance guide before setting your spending number.

Worked example

With $48,000 of yearly spending, $20,000 of after-tax part-time income and a 4% withdrawal rate, the Barista FIRE number is $700,000 compared with $1,200,000 for full FIRE. Starting from $400,000 and saving $1,500 a month at a 5% real return, the calculator estimates about 6.8 years to close the $300,000 gap.

Stress-test the part-time income

Part-time income is less certain than a salary. Try entering a lower figure, or zero, to see the full-FIRE fallback. If losing that income would push your plan off course, consider building a cash buffer or a larger portfolio before you switch. This tool is an estimate and not career or investment advice.

Frequently asked questions

How accurate is the Barista FIRE number?

The arithmetic is simple; the uncertainty is in the part-time income and health-insurance costs. Test lower income figures before relying on it.

Who is Barista FIRE for?

People who would like to leave demanding full-time work but are happy to keep some flexible or part-time income.

Do I have to work as a barista?

No. The term covers any part-time or flexible work that pays part of your living costs.

Should part-time income be before or after tax?

Enter it after tax so it matches spending. If taxes are significant, include them in spending instead and enter gross income — just be consistent.

How long should I plan to work part-time?

That is a personal choice. Use the Coast FIRE calculator to see when your portfolio alone could carry you to full retirement.

Is the Barista FIRE calculator free to use?
Yes. The Barista FIRE calculator is free, needs no signup or account, and the calculation runs in your browser with JavaScript.
Sources and further reading