By Most people treat financial independence as a single, distant finish line: one big number you cross, after which you never have to work again. That framing is intimidating, and it is also misleading. FIRE is not one milestone. It is a series of them, and each one buys you a meaningful amount of freedom long before you hit the final number.
The FIRE community talks about several types of FIRE, each one a distinct level of financial security: Lean FIRE, Barista FIRE, Coast FIRE, FIRE itself, and Fat FIRE. Four of them work as milestones on the way to the final number, and crossing each one changes how it feels to go to work on Monday morning. Coast FIRE is a different kind of point: the day you could stop saving.
In this article, I walk through each type of financial independence: what it means, how its number is worked out, why the distinction matters, and how I track progress toward the four milestones in Lume, a private, offline-first FIRE tracker for Mac and iPhone.
Why think in milestones instead of one number?
When your only goal is “the big number”, progress feels invisible for years. You can save diligently for a decade and still feel like you have barely started, because you are measuring yourself against a target that is 80% away.
Breaking the journey into milestones fixes that in two ways.
It makes progress visible. Crossing your first milestone - knowing your investments could cover the basics if everything went wrong - is a genuine psychological shift. You are no longer starting from zero. You have built a safety net that most people never build.
It changes your decisions earlier. You do not need full financial independence to benefit from being closer to it. Each milestone gives you more leverage: the ability to take a pay cut for better work, to weather a layoff without panic, to say no to things you would otherwise tolerate. Freedom arrives gradually.
The maths behind the first three milestones is the same - the 4% rule, which says you can safely withdraw about 4% of your invested net worth each year without running out of money over a long retirement. The only thing that changes between milestones is the size of the expenses you are trying to cover.
Lean FIRE
The first milestone is the point where a 4% withdrawal from your invested assets would cover your essential expenses - the things you genuinely need to stay alive and comfortable. Housing, food, utilities, insurance, basic transport. Not restaurants, not travel, not the nice-to-haves.
This is one of the most underrated milestones in the whole FIRE journey, and one I wish more people talked about.
Reaching Lean FIRE does not mean you can quit your job and live your current lifestyle. It means something quieter but just as powerful: if you lost your income tomorrow, your investments could keep a roof over your head and food on the table indefinitely. Your basic survival is no longer dependent on your next paycheck.
That is an enormous amount of security. It turns a layoff from a crisis into an inconvenience. It lets you take risks - switching careers, starting something of your own, taking time off - that would be unthinkable when you are living paycheck to paycheck.
In Lume, this is why spending is split into Survival and Non-essential groups during the monthly close. That split is what makes Lean FIRE measurable. Lume knows your annual Survival spending, applies the 4% rule, and shows you exactly how close your net worth is to covering them.
Barista FIRE
The second milestone sits between Lean FIRE and FIRE itself, and it is one of the most practically useful points on the map. Barista FIRE is the point where your portfolio can cover your spending apart from what a relaxed part-time job brings in. You start drawing on your investments, and the job pays the rest.
The name comes from that part-time job - the barista shift, the bike shop, a few days a week of freelance work. You are no longer dependent on a demanding full-time career, but you have not fully stopped working either.
Because it starts from the income, the number follows from it. Say you spend €2,240 a month and a part-time job would bring in €1,200. Your portfolio has to cover the other €1,040, so at a 4% withdrawal rate: €1,040 × 12 ÷ 4% = €312,000. A better-paid job makes the number smaller; one that covers all your spending means you are there already. Barista FIRE: What It Is and How to Work Out Your Number goes further: how the part-time income moves the date, and how to get the inputs right.
Barista FIRE is often confused with Coast FIRE, and the difference is the one people ask about most: with Barista FIRE you draw on your portfolio now, while with Coast FIRE work still pays all of today’s spending and the portfolio is left alone to grow.
The appeal is that Barista FIRE arrives well before FIRE itself, and the trade-off is attractive: drop your working hours significantly, reduce stress, have time for the things that matter, and let compounding handle the rest. For many people, this is the real inflection point - the moment where work becomes optional in a meaningful way.
In Lume, you set Barista FIRE by that part-time income: a monthly amount in Settings, which works the target through with your own spending. Until you enter one, Lume assumes half your spending. Each scenario can take a different income, so you can see what a change of job does to the date.
Coast FIRE
Coast FIRE is the point where your portfolio, left alone to grow, would reach your FIRE target by the time you want to stop working. You don’t draw on it and you don’t add to it. From then on, work only has to pay for today’s spending, so you can stop saving, take a lower-paid job you like more, or simply stop worrying about whether you are saving enough.
The number comes from your FIRE target and the years you have left. Say you spend €2,240 a month, so at a 4% withdrawal rate your FIRE target is €672,000. If you want to stop working in 20 years and assume a 5% return a year after inflation, you need €672,000 ÷ 1.05^20 - about €253,000 - invested today. Less time, or a lower return, makes the number bigger.
That is where it differs from Barista FIRE. With Barista FIRE, you start living partly on your portfolio now. With Coast FIRE, you don’t touch it: work still covers all of your spending, and compounding does the rest.
Lume doesn’t show a Coast FIRE milestone yet. It comes to the app with 3.0, worked out by the same scenario engine as your other dates rather than by the single formula above.
FIRE
The third milestone is what most people mean when they say “FIRE”: the point where a 4% withdrawal would cover your entire current lifestyle - essential expenses plus all the non-essential spending that makes life enjoyable.
This is the classic finish line. When you reach FIRE, you can stop working and maintain your life exactly as it is today, indefinitely, drawing down 4% of your portfolio each year.
The gap between Lean FIRE and FIRE is worth dwelling on, because it is entirely within your control. The difference between the two numbers is your non-essential spending. Someone with a lean lifestyle might find the two milestones are close together. Someone with significant discretionary spending will have a much larger gap - which is useful information in itself. It shows you, in concrete terms, exactly how much your lifestyle choices are extending your timeline.
Lume calculates this milestone from your total spending (Survival + Non-essential), so as your spending changes over time, your FIRE target adjusts with it. That keeps the goal honest. There is no point chasing a number based on a lifestyle you no longer live.
Fat FIRE
The fourth milestone is the most ambitious. Fat FIRE is FIRE with room to spare: a portfolio that funds a more generous lifestyle than the one you live now - a margin that removes any anxiety about occasional splurges, inflation, or unexpected costs.
In American writing it is usually quoted as a spend of $100,000 a year or more. That figure doesn’t travel well: what counts as generous in Lisbon or Berlin is a different number. Lume sets Fat FIRE as a multiple of your own spending instead - 1.5× by default - and Settings shows what that works out to. At €2,240 a month, 1.5× is €3,360 a month, or about €40,300 a year.
Where standard FIRE gives you enough to maintain your current lifestyle, Fat FIRE gives you room to upgrade it. It is less about reaching a precise threshold and more about the feeling that money has become a non-issue - you can travel more, give more, spend without second-guessing, and still leave a growing portfolio behind.
Not everyone targets Fat FIRE, and that is fine. For many people, FIRE is the real goal and Fat FIRE is a stretch ambition. But tracking it matters because it puts your FIRE number in perspective. If your current expenses are relatively lean, Fat FIRE may not be as far as you think. If you have been compressing your lifestyle to reach FIRE faster, this milestone shows you the cost of that compression - and whether the trade-off is worth it.
Watching all four at once
The thing I find genuinely motivating is seeing all four milestones on the dashboard together, next to my net worth. They fill up at different rates, and that tells a story. With a scenario set up, each one also carries the month and the age I could reach it - which turns “45% there” into something I can plan around.
Early on, Lean FIRE climbs quickly - it is the smallest target, so every month of saving makes visible progress. Watching it approach 100% in the first few years is what keeps the habit alive when the final number still feels impossibly far away.
As Lean FIRE fills, your attention naturally shifts to Barista FIRE, then FIRE, then eventually Fat FIRE. You are never staring at a single bar that has barely moved. There is always a nearer milestone to chase, and crossing each one is a real, earned moment.
Even in months when the market dips and your net worth falls, a high savings rate keeps pushing all four bars forward, and every close moves the dates with them. Once you see that relationship play out month after month, the whole journey stops feeling abstract.
Start tracking your milestones
You do not need to pick one type of FIRE and ignore the rest. The point is to see all four at once, and to watch them progress month over month as part of your regular monthly close. If you have not set your four targets yet, Getting Started covers them in step 3.
General information, not financial advice. Your taxes, pension and circumstances will differ from the examples here. More on that.