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Last year, Elon Musk became the first person in history to surpass a net worth of $500 billion. Now, the Tesla and SpaceX CEO says he expects to pay roughly the same amount in taxes over his lifetime.
“I will probably end up paying over $500B in taxes, inclusive of death,” Musk wrote on X (1).
The claim is staggering. But is it realistic?
Musk’s claims come at a time when his compensation, particularly from Tesla, is once again in the spotlight. After a Delaware judge voided his 2018 pay package, Tesla shareholders voted to re-approve the deal, which is potentially worth tens of billions of dollars in stock options if performance targets are met (2). Those options, when exercised, would trigger massive tax bills tied to the value of the shares.
This also isn’t the first time Musk has publicly sparred over taxes. In 2021, he clashed with lawmakers over proposals for a billionaire “wealth tax” — arguing that taxing unrealized gains would discourage innovation (3). In the same year, he sold billions of dollars of Tesla stock and paid what he described as “the largest tax bill in history.”
But to understand whether a $500 billion tax bill is even plausible, you have to understand how billionaire wealth is taxed in the first place.
In 2021, Musk said he would pay about $11 billion in taxes, largely due to exercising Tesla stock options. At the same time, media outlets widely reported it as one of the largest single-year tax bills in American history (4).
That tax liability was triggered after Musk sold billions of dollars’ worth of Tesla shares and exercised stock options, which are taxed as income upon sale.
Long-term tax data, however, shows a different picture.
A ProPublica investigation into confidential IRS data revealed that between 2014 and 2018, Musk reported roughly $1.52 billion in income and paid about $455 million in federal income taxes (5). That rate is far lower than the growth of his overall wealth during that period.
The same report found that, based on IRS filings, Musk paid no federal income tax in 2018.

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