The bottom line in plain language:

• A one‑time US 5% wealth tax on billionaires (as proposed in CA) is like a big, single hit: roughly $200–$300B once or about $2-$3 trillion over 10 years if that was in place instead of the proposed 1 year.

• A tax on billionaires by states would drive billionaires to states that did not have the tax, and they would get increases in revenue.

• Closing major loopholes and enforcing them for 10 years is like fixing a leaking pipe: roughly $2–$3T over a decade.

• That means loophole closure over 10 years could raise something like $1.7–$2.8 trillion more than a one‑time 5% wealth tax, if the political will and enforcement actually matched the theory.

Rough 10‑year revenue approximation of: "1 Time Wealth Tax" vs "Closing Tax Loophole on rich and Co."

Billionaires and the ultra-wealthy largely avoid income taxes by focusing on accumulating assets rather than receiving high salaries, leveraging legal strategies, and utilizing loopholes within the tax code

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Stanford Institute for Economic Policy Research (SIEPR) +1. 

Here is a list of the primary methods they use to avoid taxes, with examples:

1. The "Buy, Borrow, Die" Strategy. 

This is the foundational strategy for many billionaires. They acquire assets (stocks, real estate) that increase in value (buy), borrow against those assets for cash flow without triggering income tax (borrow), and pass the assets to heirs with a stepped-up cost basis, eliminating capital gains tax on the appreciation (die). 

DC Fiscal Policy Institute +2

• Example: Oracle founder Larry Ellison uses his shares as collateral for personal loans, including a $10 billion credit line, to fund major purchases like a $300 million Hawaiian island, avoiding the need to sell shares and trigger capital gains tax. Elon Musk is using the same strategy to protect the Trillion-dollar bonus he is to receive for meeting certain goals

• SmartAsset

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2. Tax-Favored "Carried Interest." 

Hedge fund and private equity managers often structure their compensation as "carried interest," which is taxed at the lower long-term capital gains rate (maximum 20%) rather than the higher ordinary income tax rate (up to 37%). 

Stanford Institute for Economic Policy Research (SIEPR) +4

• Example: A manager making hundreds of millions in profit from managing other people's money treats that income as an investment return rather than a fee, paying 20% tax instead of nearly double that. 

• Stanford Institute for Economic Policy Research (SIEPR)

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3. Stepped-Up Basis on Inheritance. 

When assets are passed on to heirs, the cost basis of those assets is "stepped up" to the market value at the time of death. The huge appreciation built up during the original owner's life is never taxed. 

DC Fiscal Policy Institute +1

• Example: A billionaire buys stock for $1 million that becomes worth $1 billion. If they sell, they owe tax on $999 million. If they die and bequeath it to children, the children inherit it with a $1 billion basis, erasing the tax liability. 

• Yahoo Finance +2

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4. Real Estate Depreciation & 1031 Exchanges. 

Real estate investors can use depreciation to create a tax loss on paper, even if the property is actually increasing in value. A "1031 exchange" allows them to swap one investment property for another without triggering capital gains taxes. 

Interactive Accountants +3

• Example: A billionaire can buy a luxury hotel, claim massive depreciation deductions against other income, and later swap it for another property while deferring any taxes on the profit. 

• ProPublica +1

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5. Sophisticated Trust Structures.

Billionaires use sophisticated, often offshore, trust structures to transfer wealth to heirs while minimizing gift and estate taxes. These trusts allow them to retain control while legally separating the assets for tax purposes. 

Interactive Accountants +4

• Example: Grantor Retained Annuity Trusts (GRATs) allow wealthy individuals to transfer asset appreciation to heirs tax-free by locking in a specific valuation, often passing millions without paying gift taxes. 

• On Data and Democracy +4

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6. Claiming Hobbies as Business Losses.

Tax laws allow business expenses to be deducted. The ultra-wealthy can structure expensive hobbies as legitimate businesses to write off losses against their income. 

ProPublica

• Example: Six owners of thoroughbreds at the 2021 Kentucky Derby were found to have taken a combined $600 million in tax write-offs on their horse racing operations. 

• ProPublica

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7. Utilizing Investment Losses to Offset Gains.

When billionaires do sell stock to realize gains, they often strategically sell other investments that have lost value in the same year, using those losses to reduce or zero out their tax bill. 

CNBC

• Example: An executive may sell profitable tech stock while simultaneously selling losing investments, ensuring their net taxable gain for the year is zero, as done by Amazon's Jeff Bezos in certain years.

8. Borrowing Against Portfolio (Non-Taxable Cash)  

Because loan proceeds are not considered taxable income, billionaires can live off borrowed money, leaving their tax returns showing very little income. The interest on the loan is tax-deductible.

Yahoo Finance

• Example: Tesla CEO Elon Musk has regularly borrowed tens of billions against his stock holdings, receiving 

Is there inequality in the US?

Here are the main ways big companies pay very low taxes:

1. Accelerated Depreciation. 

Companies are allowed to deduct the cost of capital investments—such as warehouse machinery, data centers, and equipment—as expenses. Accelerated depreciation allows them to take those deductions quickly, often writing off equipment in the first year of purchase rather than over the life of the asset. For example, Amazon has used this to offset its tax bill while investing in new infrastructure. 

Institute on Taxation and Economic Policy +

Government tax credits are designed to incentivize specific activities, such as research and development (R&D) or investing in renewable energy. 

11Alive.com

• R&D Credits: Companies like Meta and Amazon use research credits to lower their taxable income.

• Employee Stock Options: When employees exercise stock options, the company can often claim a tax deduction equal to the profit the employee makes, which can be significantly higher than the compensation expense recorded on their financial statements.

• Renewable Energy Credits: Companies investing in wind or solar farms (like Amazon or energy companies like Exxon) can get large tax credits. 

• Institute on Taxation and Economic Policy +

2. Transfer Pricing Manipulation: 

Companies set internal prices for goods, services, or IP transferred between subsidiaries in different countries.: 

Example:  

A U.S. subsidiary “buys” a product from its Irish subsidiary at an inflated price, reducing U.S. profits and increasing profits in low‑tax Ireland.

3. Offshoring Profits (Profit Shifting)

Multinational companies can shift profits from high-tax countries to low-tax countries (tax havens) like Ireland or Bermuda. 

USAFacts +1

• Intellectual Property (IP) Shifting: A company may transfer its branding or patents to a shell subsidiary in a low-tax country. The high-tax parent company then pays "royalty fees" to its own subsidiary for the right to use that branding, which shifts the profits to the tax haven. 

• Tax Justice Network +2

4. Carrying Forward Losses

. If a company makes a loss in a previous year, the tax code allows it to use that loss to offset profits in future years. Amazon was famously able to do this for years, using past operating losses to negate current tax liability. 

5. CARES Act and Other Temporary Provisions. 

The 2020 CARES Act allowed companies to "carry back" losses, using pandemic-era losses to offset profits from previous years, leading to tax rebates. 

Institute on Taxation and Economic Policy

6. Extensive Lobbying and Tax Planning: 

Large corporations employ teams of accountants and lawyers to take advantage of complex tax codes. They often lobby to ensure these tax incentives and loopholes remain in place, arguing that low corporate taxes foster investment and jobs. 

Investopedia +1

Summary of Impact

• Amazon: Has used accelerated depreciation, R&D credits, and stock-based compensation deductions to maintain a low effective tax rate.

• Meta/Tech Giants: Frequently use IP shifting to move profits to lower-tax jurisdictions.

• Energy Companies (Exxon): Often leverage specific energy tax credits and depreciation for capital-intensive operations. 

• Institute on Taxation and Economic Policy +4

The 2022 Inflation Reduction Act, which introduced a 15% minimum corporate tax on large companies, was designed to target some of these practices, though many strategies remain entrenched. 

Investopedia +1

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