What is Chubby FIRE?

Updated Aug 2026

The short version

Comfortable rather than frugal, roughly $80,000 to $150,000 a year.
Targets land between $2 million and $3.75 million at 25 times.
Buys most of the safety of a fat plan for a fraction of the extra years.
Reachable on a strong salary without needing equity or a sale.
The budget still has room to cut, which is what keeps the plan sturdy.

Chubby FIRE arrived because the existing labels left a hole. Lean meant a small budget and a short timeline. Fat meant a large budget and a long one. Most people who run the numbers land between the two and then have no word for what they are doing.

The middle is not a compromise position either. On the trade between money and years it is usually the best available answer, and the reason is that safety does not improve in a straight line as the portfolio grows.

The numbers

Chubby FIRE target by annual spending
Annual spending	25x (30-year plan)	30x (early exit)
$80,000	$2,000,000	$2,400,000
$100,000	$2,500,000	$3,000,000
$120,000	$3,000,000	$3,600,000
$140,000	$3,500,000	$4,200,000

Spending is after tax. Draws from traditional accounts have to be grossed up for income tax.

Why the middle usually wins

Safety comes mostly from having something to cut. A budget with $30,000 of discretionary spending in it can drop to a $70,000 year during a bad market and recover without touching the plan. That single ability does more for a retirement's odds than most withdrawal rules do, and a chubby budget already has it.

Going from chubby to fat buys more of the same thing at a steep price. Take a household saving $90,000 a year at a 5% real return. $2.5 million takes about 18 years. $4 million takes about 24. Six extra years, and the marginal safety they buy is small, because the first $30,000 of flexibility was the valuable part.

Going from lean to chubby is the opposite trade and it is a good one. Moving a $40,000 budget to $90,000 adds roughly $1.25 million to the target, and it converts a plan with no slack into one that can ride out a lost decade. That is worth paying for.

Worth knowing: the number that matters is discretionary spending, not total spending. Two households at $110,000 a year are in different positions if one has a $4,000 monthly mortgage and the other owns outright. Fixed costs cannot be cut in a bad year, so a plan with a high fixed share behaves like a lean plan no matter what the headline budget says.

Who it fits

Households on a strong professional income without equity compensation. Two salaries in the $120,000 to $200,000 range, saving hard, reaching $2.5 million in their late forties. That path does not get to $5 million without something unusual happening, and it does not need to.

People with children, which is the underrated case. Kids move a budget in ways that are hard to trim on short notice, so a plan that assumed a lean number often stops working around the time the second one starts school. Chubby budgets absorb that.

Anybody who wants a retirement that resembles their current life rather than a smaller version of it, but who is not willing to pay eight more years for the top end. That is the common case and it is why the label caught on.

How to set the number

Start from a year of actual statements, not an estimate. Split the total into fixed and discretionary. The fixed half is what your plan has to survive on in a bad market, so it is the half that determines how much risk you are carrying.

Then add the two costs people leave out. Health insurance until Medicare, which runs near $18,000 a year for a couple in their fifties before subsidies. And tax on withdrawals, which depends entirely on which accounts the money comes from. Withdrawal order covers how much that varies.

Multiply the result by 25 for a plan to 90 from a standard retirement age. Use 28 to 30 if you are leaving in your forties, since the research behind the 4% rule tested 30-year retirements rather than 45-year ones.

Against the other variants

Lean FIRE gets there years earlier and gives up all the slack. Fat FIRE keeps the slack and charges a decade for it. Coast FIRE and Barista FIRE are milestones on the way to any of them rather than alternatives to them.

So which one. If your fixed costs are a small share of a comfortable budget and the number is reachable inside a decade, chubby is the trade to take. It is the point where more money stops buying much more safety.

Find where your number lands

Run your spending against 95 years of market history and see how the plan holds up if the first five years go badly. That is the test the multiples cannot do on their own.

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Common questions

What is Chubby FIRE?

Chubby FIRE is financial independence at a comfortable budget rather than a frugal or a luxurious one. It generally means spending between about $80,000 and $150,000 a year, so a portfolio somewhere from $2 million to $3.75 million.

What is the difference between Chubby FIRE and Fat FIRE?

Budget, and therefore years. Fat FIRE usually starts around $150,000 of annual spending and runs upward with no ceiling. Chubby sits below it. The practical difference is that chubby targets are reachable on a strong professional income without equity compensation or a business sale.

How much do you need for Chubby FIRE?

At 25 times spending, $80,000 a year needs $2 million and $120,000 needs $3 million. Retiring in your forties or early fifties argues for 28 to 30 times instead, which puts the same budgets at roughly $2.4 million and $3.6 million.

Why do people pick Chubby FIRE over Lean FIRE?

Flexibility. A chubby budget has real discretionary spending in it, so a bad market can be absorbed by spending less for a couple of years. Lean budgets have no such room, which is their main weakness over a long retirement.