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š How to Survive as Elon's CFO
7 tips for succeeding in a hardcore environment


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The CyberCFO
Lucas Hughes was a middle manager in finance at SpaceX.
Despite being with SpaceX for 8 years, he had never interacted with Elon Musk.
Until today.
He knew the business, and came from good stock. Before SpaceX he had four years with Goldman Sachs. But he was nervous. Who wouldnāt be?
Musk opened the conversation by dictating his expectations of finance:
āYou are not the friend of the engineers. You are the judge. If youāre popular among the engineers, this is bad. If you donāt step on toes, I will fire you. Is that clear?ā
After a nervous nod from Hughes, Musk got to business:
āWhat are the best parts in Raptor as judged by the idiot index?ā
āIām not sure. I will find out,ā Hughes responded.
āYou better be f*cking sure in the future you know these things off the top of your head.ā
What followed was a humiliating diatribe from Musk, but he saved the most cutting line for last:
āYou have very badly failed. If you donāt improve, your resignation will be accepted. This meeting is over. Done.ā
The next day Hughes returned with all of the data at his fingertips. He and Musk worked through a plan to reduce the cost per Raptor engine by 90% in the next 12 months. Musk behaved like he didnāt remember the conversation from the previous day.
This is an extract from the Walter Isaacson biography of Elon Musk. And a peek behind the curtain of working in finance in one of Muskās businesses.

How to Survive as Elon's CFO
I found the book fascinating.
I couldnāt help thinking about what it would be like to be a CFO in that environment.
How would you run a budget process?
How would you control spend?
How would you stop Musk from letting his mouth find trouble with the SEC?
Youād think a CFO would last about as long as Elonās latest promise of full self-driving.
But Muskās CFOs seem to have a surprisingly normal tenure.
Zach Kirkhorn stepped down from Tesla last year after 13 years, with his last four as CFO. And did so with a reputed $590m fortune, all before reaching his 40th birthday.
Teslaās stock increased 10x during Kirkhornās four-year reign:

Source: Google Finance
Thatās an incredible run by any measure.
And Bret Johnsen has been CFO at SpaceX for 13 years.
So not only is it possible to stick it out as CFO in Muskās businesses. You can thrive.
But how?
Well, Iāve never met Elon. But I have worked for an autocratic, ultra-successful founder. Some of the stories in Isaacsonās biography rang close to home.
In my view, it takes about ten years as CFO in a regular corporation to learn what you can get from one year as a CFO in chaos.
So, here are the 7 things you can do to succeed as the CFO for a maniacal entrepreneur:
Before we get into itā¦ Elon Musk is a controversial figure. There are enough opinions on Muskās behavior, you donāt need to hear mine. (Likewise, Iām not interested in yours.)
There are two reasons I have written this piece:
I find the challenge of succeeding as a CFO for Musk, or someone like him, fascinating.
Because a lot of the learnings apply across many different settings.
1) Be a Missionary, not a Mercenary
One of the richest guys in the world. A value creation machine.
Itās easy to think working as a CFO for Musk would be a great way to get rich. Just need to keep the balls in the air, and make sure you catch Muskās slipstream to build your fortune, right?
Well, maybe ā¦ it has worked for many, particularly Kirkhorn.
But that has come with more volatility than a normal gig. With survival (and the risk of stock options going to zero) being a threat through the various highs and lows of Teslaās history. Not to mention the risk of being fired at the whim of the founder.
If you want to get rich as a CFO, this is a way. But not the best way. A F500 CFO role or one or two big-cap PE exits will get you a hell of a bag with less career and financial risk.
To get the most out of working with someone like Musk, you have to commit to the mission. Specifically, you have to commit to his mission.
Whether thatās electric vehicles, going to space, or some brain chip I donāt understand.
Musk describes himself as āhardcore.ā He is punishing on his team and justifies it by being even more punishing on himself. Unless that sounds electrifying to you, stay away.
2) Donāt Manage Expectations - Try & Fail
One of the first lessons you learn in corporate life is āmanaging expectations.ā This is corporate bull sh*t speak for promising less than you deliver. Being cautious about the commitments you make.
But managing the expectations of a rabid entrepreneur is a great way to get fired.
Entrepreneurs are tinkerers. Pragmatists. They are the kid in school that pulls the fire alarm. They do it just to see what happens. Spoiler: when you pull the fire alarm, the fire alarm rings.
You cannot tell people like this that they are wrong.
So a debate about whether it is going to take 2 hours or 5 days to refresh the costings for the Model 3 is pointless. That is not going to end well for you.
Donāt manage expectations. Instead, try. And fail, if you must. But go for the moonshot.
Muskās great trick is setting an outlandish target. A 100x transformation. And when only 25% come in, he still has a 25x transformation in hand. Then he goes again.
In 2016 Musk ordered his engineers to remove all steering wheels and pedals from the prototype Model 3 and Model Y.
Each time Musk walked the factory the engineering team would make sure there were pictures and models of pedalless robotaxis to show to him.
This was a distraction. The engineers continued to plow their energy into developing cars with pedals and steering wheels. Eventually, Musk accepted the engineers' design for launching the cars.
He needed to see it wasnāt (yet) possible to accept it.
3) Be a First Principles Thinker
You donāt get to Mars by accepting conventional wisdom. Musk breaks everything at his businesses down to first principles.
This means removing assumptions. And going back to only the things we know to be fundamentally true. Then building logic up from those truths to solve problems.
One of Muskās go-to soundbites is āPhysics is the law, everything else is just a recommendation.ā
Do not expect anything you say to be taken at face value. That means the empty platitudes and delay tactics that work in 99% of the worldās corporations wonāt work here.
You need to understand your craft, from the foundations. This will help you react when the sh*t hits the fan. And make you a 10x better CFO.
Itās the opposite of the āweāve always done it that wayā mentality.
These sorts of elevated critical thinking skills are rare. And, frankly, are particularly rare in the accounting and finance profession. But to cut it in this environment, you have to be one of the rare ones.
4) Donāt Over-Automate
If you are working for a techno spacebot like Elon Musk, surely you need a high-tech finance function? Yes, I grew up in the 80s, we still say āhigh-techā.
And to some extent that is true. With a front office at the apex of innovation, you canāt have the back office lagging too far behind.
But ā¦ these businesses also move at a breakneck pace. Metrics will change, and new operating units will start overnight. Processes will need to adapt quickly to accommodate.
These are generally bad conditions for automating. Automation is great at accelerating the time of an established process. Like reducing time per transaction/cycle/process.
Itās not good with poorly established processes. If your process produces sh*t, then automation will just produce sh*t at a fast rate.
For example, the Tesla Nevada battery pack factory was built with the highest level of automation and robotics. The goal? Reduce labor cost per unit.
It didnāt work.
āWe began sawing robots out of production lines, and throwing them into the parking lotā
Yes, excessive automation at Tesla was a mistake. To be precise, my mistake. Humans are underrated.
ā Elon Musk (@elonmusk)
7:54 PM ā¢ Apr 13, 2018
(Imagine the asset impairment š¬)
Automate, yes. But only once the underlying process is well-defined and effective in a manual state.
Note - AI technology will change this dynamic in the future, but itās not the future yet ā¦
5) Embrace their Metrics
Entrepreneurs have their own āpetā metrics. Often a crudely calculated KPI that is more familiar to them than anyone else.
For Elon, this is the Idiot Index.
Idiot Index = Cost of a part or finished product divided by cost of its component raw materials at the commodity level.
Elon has his finance teams track the idiot index by component in every product.
The thought is that the higher the idiot index, the more complexity or inefficiency has been engineered into the component. Either within his businesses or the supply chain.
Anyone with a basic understanding of manufacturing knows this is far from perfect. It ignores labor, equipment costs, energy, etc.
As a metric, it is (idiotically) simple.
Which is exactly why it is perfect for businesses like Tesla or SpaceX. It is the only way to change archaic industries with established supply chains (cars and space).
The idiot index is about using first principles to challenge deeply embedded supply chain norms or rules. The kind that load-in hidden cost.
Most finance professionals canāt cope with this sort of ātechnical imperfectionā in a metric. They over-intellectualize it.
Donāt believe me? Read some of the comments underneath this tweet:
Best takeaway from the @elonmusk book is the āIdiot Indexā.
Idiot Index = Cost of a part or finished product divided by cost of its component raw materials at commodity level
Elon has his finance teams at Tesla and Spacex track the idiot index by component in every product.ā¦ twitter.com/i/web/status/1ā¦
ā The Secret CFO (@SecretCFO)
5:30 PM ā¢ Nov 2, 2023
Bright people wrapped up in the technical accuracy, completely missing the point of why it exists in the first place. (Sorry if you are one of the people who commented.)
As the CFO, you need to lean into the pet metrics of the founder. Understand them, and build reporting around them. Maybe you can improve the quality of the metric over time. But they won't hear you until you've demonstrated that you can see it from their perspective.
6) War Time All the Time
Itās become cliche, but from my experience, itās generally true. There are wartime managers and peacetime managers.
Wartime managers are agitators, with a bias to action. Great when āsomething needs to happen.ā Less good at keeping a steady state.
Peacetime managers are the steady hand to keep a good thing going. Not so good when the sh*t hits the fan.
In Muskās businesses, itās wartime, all the time.
He moves from one 24/7 maniacal āsurgeā to fix a time-critical problem to another. He catches an hour or two of sleep in a sleeping bag on a factory floor for days on end. And I donāt mean in the scrappy start-up days. Heās still doing that now.
In other words, aside from the long hours, the environment is chaos.
It would be easy to assume the chaos is transitory, and āthings will settle down.ā
They wonāt.
Chaos is the thing with Musk. If there isnāt chaos, he will manufacture some.
He is a walking inertia killer.
Loving chaos, tackling it with humor, and steadily bringing order to that chaos over time is the game.
7) Know Where the Line Is
When Zack Kirkhorn left Tesla, Elon sent this tweet:
I would like to thank Zach Kirkhorn for his many contributions to Tesla over the course of 13 often difficult years.
Much appreciated and best wishes for the next stage of his career.
ā Elon Musk (@elonmusk)
9:24 PM ā¢ Aug 7, 2023
Anyone who has read the book will know Elon doesnāt do things like this.
By doing a top job, over a long period of time, Zack clearly built credibility with Musk, as well as the Tesla board and investors.
This credibility would give him leverage and improve his ability to influence inside the boardroom, and with Elon.
The Tesla CFO has a special challenge to deal with. They need to balance the entrepreneurial pirate ship built by the founder with the expectations of the public markets. Often these are like oil and water. And the CFO is the guy or gal caught in the middle.
Knowing where the line is is vital. If you cry compliance too often, you lose respect of the founder. But go the other way and you could lose your career. This requires judgment, guts, and a steady hand.
As Muskās CFO you would need to slowly build credibility and trust to be able to pick disagreements. You should do this carefully and infrequently. But to work well with Musk (or someone like him) in the long run, you must be able to influence his thinking somehow.
Otherwise, why are you there?
This is an article for entertainment purposes only, based on excerpts from Walter Isaacsonās book and other background research.

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QUESTION
Arthur Levitt from US asked:
What items would you focus on if you were hunting accounting frauds?
ANSWER
Arthur, if thatās really you, you are asking this question 20+ years too late buddy ā¦ but let me try and help.
Accounting frauds are always detectable (above a certain size) if the accounting function is doing its job properly. The answer is in the balance sheet. Itās always in the balance sheet.
Providing your cash balances and reserves reconcile, detecting accounting fraud is a case of hitting the balance sheet hard. You are looking for assets (Debits) in the balance sheet that are overstated or canāt be supported. Or Liabilities (Credits) that are unrecorded, or under-recorded.
Iāve seen a few accounting frauds in my time, and every time they were detected (and avoidable) through the right balance sheet review controls. Itās normally hiding in plain sight and just waiting for someone to run down the balance sheet line by line and ask sensible questions.
They always look so obvious in hindsight.
If you would like to submit a question, please fill out this form.

In the News
Elon Musk is in the news this week regarding his pursuit of additional voting rights for Tesla. Perfect timing, given the topic of todayās special edition, and this monthās series on board structure. Here is an interesting discussion of the issue by Prof G.
This blog post from Mark Mason (CFO of Citigroup) caught my eye. A masterclass in simple finance communication. Reassuring employees about the impact of negative one-off adjustments in the financials.
Making the blog public is super smart too. Reassuring investors, and clients, as well as employees.
Work with Secret CFO
And Finally
Next week our season on Financial Control will get underway.
If you enjoyed todayās content, donāt forget to check out our sponsor Turbine.
Stay crispy,
The Secret CFO
Disclaimer: I am not your accountant, tax advisor, lawyer, CFO, director or friend. Well, maybe Iām your friend, but I am not any of those other things. Everything I publish represents my opinions only, not advice. Running the finances for a company is serious business, and you should take the proper advice you need.

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