Coast FI vs Barista FIRE: What’s the Difference
Coast FI and Barista FIRE sound alike, and they are both steps on the way to full financial independence, but they work in different ways. Coast FI is about your savings. Barista FIRE is about your job. Once you see the difference, it is easier to tell which path fits your life, or whether you want both.
Coast FI in one paragraph
Coast FI is the point where you have saved enough, early enough, that investment growth alone can carry you to your full retirement target by a normal retirement age. You stop adding to your retirement savings. You still need income to pay your living costs until you retire, because the savings are not enough to live on yet, but the retirement plan is already funded.
Example: your retirement target is $1,000,000, you are 35, and you plan to retire at 65. At an assumed 7 percent real return, you need about $131,400 saved today. The math is $1,000,000 divided by 7.61, which equals $131,367. An earlier draft used $130,000 here. That amount grows to about $989,600 in 30 years at 7 percent, which is about $10,400 short. The corrected number is $131,400.
Barista FIRE in one paragraph
Barista FIRE is the point where your savings cover most of your living costs, and a part time job covers the rest. The name comes from the idea of working part time in a coffee shop after leaving a full time career. The job is not a hobby. It pays part of your bills, and it often brings health coverage, which is a large cost in the United States before Medicare starts at 65.
Example: you plan to spend $40,000 a year in retirement. At a 4 percent withdrawal rate, that needs $1,000,000 saved. Suppose you have saved $750,000. Then 4 percent of $750,000 is $30,000 a year. A part time job that pays $10,000 a year after tax covers the gap. The math is $30,000 plus $10,000, which equals $40,000.
The 4 percent rate needs care. William Bengen published the first version in 1994. He found that a first year withdrawal of about 4.1 percent lasted for a 30 year retirement with a portfolio of 50 percent stocks and 50 percent intermediate term government bonds. The Trinity study, published in 1998, tested withdrawal rates over 30 year periods and found that 4 percent held up in most of them. Both used past data. Neither is a promise about the future.
The assumption used in this post
Every Coast FI number in this post uses one stated assumption: a 7 percent real return each year. Real means after inflation. That is an assumption, not a forecast. The examples leave out taxes and fees. Barista FIRE numbers also leave out tax on the part time pay unless the text says after tax.
How they compare
Coast FI asks: have you saved enough that growth alone will reach your target? Barista FIRE asks: have you saved enough that a small income can cover the gap to your spending? Coast FI still needs a job that pays your full living costs now. Barista FIRE needs a job that pays only the gap, but it needs that job for years, not months.
Coast FI can start at any age. You reach it when the math closes. Barista FIRE usually comes later, because you need a larger balance before your savings can pay most of your costs. A person at Coast FI is not retired. A person at Barista FIRE has left full time work, but has not stopped working.
Worked example: the same person, both paths
Use round hypothetical numbers only. Suppose you are 35. You plan to spend $40,000 a year in retirement. Your target at a 4 percent withdrawal rate is $1,000,000.
Coast FI path, step by step: your money has 30 years to grow to 65. At a 7 percent real return, 1.07 to the power of 30 equals 7.61. Then $1,000,000 divided by 7.61 equals $131,367. Round that to $131,400. So $131,400 saved at 35 reaches Coast FI. You still need a job that pays your living costs in full until 65.
Barista FIRE path, step by step: suppose you have saved $750,000. Then 4 percent of $750,000 equals $30,000 a year. Your spending is $40,000, so the gap is $40,000 minus $30,000, which equals $10,000 a year. A part time job that pays $10,000 a year after tax covers that gap. Check: $30,000 plus $10,000 equals $40,000.
Notice the trade. Coast FI needs $131,400 saved and a full income now. Barista FIRE needs $750,000 saved and only $10,000 a year of work income. The Barista FIRE balance is about six times the Coast FI balance in this example. That is why Barista FIRE comes later for most people.
The real world difference: health care
The difference that matters most in practice is often health care, not pay. In the United States, Medicare starts at 65. Before that, you must find coverage another way. A full time job usually brings employer health coverage. A Coast FI job can be a full time job, so coverage often stays in place. A part time barista job may or may not bring coverage.
Some large employers offer health coverage to part time staff who work enough hours each week, often 20 hours or more, but many part time jobs do not offer it at all. The rules differ by employer, so check the specific job before you count on it. If the job does not offer coverage, you must buy a plan on the health insurance marketplace or through another route, and that premium becomes part of the gap your part time pay must cover. A $10,000 gap can grow fast once a monthly premium is added.
The same point holds for other job benefits. A part time job may not offer paid leave, a retirement match, or disability coverage. A Coast FI job that pays your full costs may still offer those benefits, because it is a full job, not a side job. When you compare the two paths, compare the full package, not just the pay.
Which path fits which person
Coast FI fits a person who wants more choice at work now, without leaving full time work. You can take a lower paying job, change fields, or work fewer hours, as long as the job pays your living costs. Your retirement savings keep growing in the background.
Barista FIRE fits a person who wants to leave a full time career and work less, and who has saved enough that a small income covers the rest. It works best when the part time job is steady, the pay covers the gap after tax, and health coverage is sorted. It works poorly when the gap is large, the job is unsteady, or coverage costs more than the job pays.
You can also use both in order. Reach Coast FI first. Then keep saving until your balance is high enough for Barista FIRE. Many people follow that order without naming it. Coast FI comes first because it needs less saved. Barista FIRE comes next because it needs more.
The bottom line
Coast FI means your savings can reach your target on growth alone, while you still earn a full living. Barista FIRE means your savings pay most of your costs, while a part time job pays the rest. The numbers in this post show the gap: $131,400 saved at 35 reaches Coast FI for a $1,000,000 target, while Barista FIRE for the same spending needs $750,000 saved plus $10,000 a year of work. Before you pick a path, price the health coverage and the other benefits that come with the job. That cost often decides the answer.
This post is for education only. It is not financial advice. Your numbers will differ based on your spending, your retirement age, your taxes, and your investments.
Sources
Investopedia, Coast FIRE: https://www.investopedia.com/terms/c/coast-fire.asp
Investopedia, Barista FIRE: https://www.investopedia.com/terms/b/barista-fire.asp
Investopedia, The 4 percent Rule: https://www.investopedia.com/terms/f/four-percent-rule.asp
Bengen, William P., Determining Withdrawal Rates Using Historical Data, Journal of Financial Planning, October 1994: https://www.financialplanningassociation.org/article/journal/OCT94-determining-withdrawal-rates-using-historical-data
Cooley, Philip L., Hubbard, Carl M., and Walz, Daniel T., Retirement Savings: Choosing a Withdrawal Rate That Is Sustainable, Journal of Financial Planning, February 1998, the Trinity study: https://www.financialplanningassociation.org/article/journal/FEB98-retirement-savings-choosing-withdrawal-rate-sustainable
HealthCare.gov, Health coverage for part time workers and the Health Insurance Marketplace: https://www.healthcare.gov/
