Barista FIRE Calculator

About the Barista FIRE Calculator

FIRE stands for Financial Independence, Retire Early: saving and investing aggressively so that a portfolio can pay for your life long before the usual retirement age. Full FIRE needs a large portfolio, typically 25 times your yearly spending. Barista FIRE is a gentler version. You stop full-time work once your investments can cover part of your spending, and a part-time or low-stress job covers the rest. The name comes from the idea of working part-time at a coffee shop, partly for the income and partly, in the United States, for the health insurance some employers offer part-time staff.

This Barista FIRE calculator works out the portfolio you need for that arrangement, your Barista FIRE number, from your spending, the part-time income you expect and your withdrawal rate. It estimates how many years it will take to reach it from your current investments and savings rate, and compares it with the portfolio and time needed for full FIRE.

How to Use the Barista FIRE Calculator

Enter your yearly spending and the part-time income you expect, after tax.

Enter a safe withdrawal rate, often 4%.

Enter your current investments, yearly contributions and an expected real return after inflation.

The Formulas

  gap               = spending − part-time income
  Barista number    = gap ÷ withdrawal rate
  full FIRE number  = spending ÷ withdrawal rate
  years to target   n from (S + C ÷ r)(1 + r)^n = target + C ÷ r

S is your current investments, C the yearly contribution and r the real return.

Step-by-Step Example

Spending 50,000 a year, 25,000 of part-time income, 4% withdrawal, 300,000 invested, saving 30,000 a year at 5% real.

  gap             50,000 − 25,000 = 25,000
  Barista number  25,000 ÷ 0.04 = 625,000
  years           (300,000 + 600,000) × 1.05^n = 625,000 + 600,000 → n ≈ 6.3 years
  full FIRE       50,000 ÷ 0.04 = 1,250,000 → about 14.8 years

The part-time job cuts the portfolio needed in half and brings the date forward by about eight years.

The Withdrawal Rate

The safe withdrawal rate is the share of the portfolio you take out in the first year, then adjust for inflation. The well-known 4% rule comes from historical studies of US stock and bond returns over 30-year retirements. Early retirees may face retirements of 40 years or more, so many prefer 3.5% or even 3% for extra safety. Each half-point lower raises the number needed considerably: at 3.5%, the Barista number in the example rises to about 714,000.

Real Returns

Using a real return, after inflation, keeps every figure in today's money. A portfolio of stocks and bonds might be expected to earn 4 to 6% a year above inflation over long periods, though returns vary widely from year to year. Using a nominal return without adjusting spending for inflation would overstate how quickly you reach the target.

Barista FIRE Versus Other FIRE Styles

Lean FIRE aims for a small portfolio by keeping spending very low. Fat FIRE aims for a large portfolio and a comfortable lifestyle. Coast FIRE means you have saved enough early that, left to grow, it will fund a normal retirement, so you only need to earn your current costs without saving more. Barista FIRE sits between Coast and full FIRE: you draw on your investments now, but only for the part of your spending the job does not cover. It suits people who want to leave a demanding career without stopping work entirely.

Things to Plan For

Health insurance is a major cost before Medicare age in the US; part-time jobs with benefits or marketplace plans need budgeting. Taxes on withdrawals depend on account types. Sequence risk, a market fall early in retirement, does more damage when you are already withdrawing, so a cash buffer of one or two years' spending helps. Job risk matters too: part-time income may end sooner than planned. Building some flexibility into spending makes the plan more robust.

When Part-Time Work Stops

Barista FIRE often works as a bridge. Many people plan to work part-time until their portfolio grows enough for full FIRE, or until pensions or Social Security begin. Because the portfolio keeps growing while withdrawals are modest, it can reach the full FIRE number on its own within a few years, at which point the job becomes optional.

Raising Your Chances

Three levers bring Barista FIRE closer: spending less, earning more from the part-time job, and saving more now. Cutting yearly spending by 5,000 lowers the Barista number in the example by 125,000, because every dollar of spending needs 25 dollars of portfolio at a 4% withdrawal rate. A slightly better-paid part-time role has the same effect.

Revisiting the Plan

Recalculate once a year with updated savings, spending and returns, so the date stays realistic.

Understanding Your Result

The headline gives your Barista FIRE number.

The working line shows the spending gap and withdrawal rate.

The time to reach it line estimates the years from your savings and contributions.

The versus full FIRE line compares the full FIRE number and time.

When Should You Use This Calculator?

Use it to see how soon part-time work could replace full-time work.

Use it to compare different part-time incomes or spending levels.

Use it alongside a retirement plan for the years after part-time work ends.

Common Mistakes

Using gross part-time pay. Use income after tax.

Forgetting health insurance. It can be a large cost.

Using a high withdrawal rate. Long retirements need lower rates.

Mixing real and nominal figures. Keep everything in today's money.