Billionaires have a paradoxical relationship with debt. Despite having vast wealth, many ultra-high-net-worth individuals actively choose to borrow money rather than spend their own cash. This strategy, often misunderstood by the general public, stems from sophisticated tax planning that allows the wealthy to access liquidity while minimizing their tax burden. Understanding why billionaires embrace debt reveals key insights into wealth preservation and the structural advantages built into the U.S. tax system.
The Fundamental Principle: Buy, Borrow, Die
The wealthy follow a three-step strategy known as “buy, borrow, die” that fundamentally changes how they interact with their assets. First, they buy appreciating assets such as stocks, real estate, or business interests. These assets grow in value over time, building paper wealth without triggering any taxable events. Second, they borrow against these assets through securities-backed loans or other credit facilities, accessing cash without selling anything. Finally, when they die, their heirs receive a step-up in basis that effectively erases the capital gains accumulated during the decedent’s lifetime.
This approach allows billionaires to live on borrowed money while their assets continue to appreciate tax-free. The interest paid on loans is often far less than the taxes that would be owed on asset sales, making borrowing the economically rational choice for those with significant investment portfolios.
How Unrealized Gains Create Tax-Free Wealth
A cornerstone of this strategy is the treatment of unrealized capital gains in the U.S. tax code. When an asset increases in value, no tax is owed until that asset is sold and the gain is “realized.” For billionaires whose wealth is primarily held in stock portfolios, real estate, or privately held companies, this means their net worth can grow by billions of dollars without generating any tax liability.
Consider a billionaire whose stock portfolio increases from $1 billion to $3 billion over a decade. That $2 billion gain remains completely untaxed as long as the shares are not sold. Meanwhile, the billionaire can borrow against the portfolio’s value, often accessing 50-70% of the portfolio’s worth in liquid cash through securities-backed lines of credit.
The Mathematics of Borrowing Versus Selling
The financial advantage becomes clear when comparing the costs. If a billionaire needs $10 million for expenses and sells stock to raise it, they would typically owe long-term capital gains tax at rates up to 20% at the federal level, plus a 3.8% net investment income tax, plus potential state taxes. In high-tax states like California or New York, the combined rate can exceed 30%, meaning $3 million or more would go to taxes.
Alternatively, borrowing that same $10 million against their portfolio might cost just 2-4% in annual interest. Even over multiple years, the interest payments remain substantially lower than the one-time tax hit from selling. Furthermore, the underlying assets continue to appreciate, often at rates exceeding the borrowing costs, making the strategy even more advantageous.
Securities-Backed Lending: The Billionaire’s ATM
Securities-backed lines of credit are the primary tool billionaires use to convert unrealized gains into spendable cash. These specialized loan products allow borrowers to pledge their investment portfolios as collateral while maintaining ownership and continuing to receive dividends and benefit from appreciation.
- Low interest rates: Because these loans are secured by liquid, marketable securities, lenders offer highly competitive rates, often tied to short-term benchmarks plus a small spread
- No repayment schedule: Many securities-backed facilities operate as revolving credit lines with no mandatory amortization, allowing borrowers to pay interest only indefinitely
- Flexibility: Borrowers can draw funds as needed and repay at their discretion without prepayment penalties
- No income verification: Unlike traditional loans, these facilities typically require no documentation of employment or income, as the collateral itself provides security
For billionaires, these loans function as a permanent source of liquidity that never requires selling appreciated assets or triggering taxable events. The loan can even be refinanced indefinitely, with principal repayment deferred until death.
The Step-Up in Basis: Erasing Gains at Death
The final piece of the strategy involves estate planning and the tax treatment of inherited assets. Under current U.S. tax law, when someone dies, their heirs receive assets with a “stepped-up” basis equal to the fair market value at the date of death. This provision effectively eliminates all capital gains accumulated during the decedent’s lifetime.
Returning to our earlier example, if a billionaire bought stock for $1 billion that grew to $3 billion, their heirs inherit the stock with a new basis of $3 billion. If the heirs immediately sell the stock for $3 billion, they owe zero capital gains tax. The $2 billion of appreciation that occurred during the billionaire’s lifetime is never taxed by the income tax system.
This creates a powerful incentive to hold appreciated assets until death rather than selling during life. Combined with borrowing strategies, it allows billionaires to access their wealth without ever paying capital gains taxes, with any outstanding loans typically paid from the estate after receiving the favorable step-up in basis.
Estate Tax Considerations
While the step-up in basis eliminates income taxes on appreciation, estates above certain thresholds may face federal estate tax. However, the estate tax exemption has been historically high, exceeding $13 million per individual in recent years. Through sophisticated estate planning techniques, including trusts, gifting strategies, and charitable vehicles, many wealthy families can further reduce or eliminate estate tax exposure while still benefiting from the step-up in basis.
Additional Tax Advantages of Strategic Borrowing
Beyond avoiding capital gains taxes, debt provides billionaires with several additional tax benefits that enhance wealth accumulation and preservation.
Interest Deductibility
In certain circumstances, interest paid on investment loans may be tax-deductible, subject to limitations. When interest can be deducted against investment income, the after-tax cost of borrowing drops even further. While the Tax Cuts and Jobs Act of 2017 limited some interest deductions, strategic planning can still allow wealthy taxpayers to benefit from this provision.
Avoiding the 3.8% Net Investment Income Tax
High-income taxpayers face an additional 3.8% Medicare surtax on net investment income, including capital gains. By borrowing instead of selling, billionaires avoid generating the investment income that would trigger this additional tax, preserving more wealth over time.
State Tax Avoidance
Many states impose their own capital gains taxes, sometimes at substantial rates. Borrowing instead of selling allows wealthy individuals to avoid these state-level taxes entirely, representing additional savings that can exceed 10% in high-tax jurisdictions.
Real-World Examples and Reporting
Investigative reporting has revealed how America’s wealthiest individuals utilize these strategies in practice. According to reports analyzing tax records, some billionaires have reported relatively modest taxable income despite net worths in the tens of billions of dollars, often showing single-digit or even zero federal income tax liability in certain years.
This is achieved not through illegal tax evasion but through perfectly legal strategies centered on borrowing against appreciated assets. By living on borrowed funds rather than realized income, these individuals minimize their tax obligations while maintaining extravagant lifestyles funded by credit lines secured by their investment portfolios.
Policy Debates and Potential Reforms
The ability of billionaires to access vast wealth while paying minimal taxes has sparked ongoing policy debates about tax fairness and potential reforms. Several proposals have been advanced to address these strategies, though implementation faces political and practical challenges.
- Wealth taxes: Some proposals would tax net worth directly rather than just realized income, though constitutional questions remain about federal wealth taxation
- Mark-to-market taxation: This approach would tax unrealized gains annually for the wealthiest taxpayers, eliminating the advantage of holding appreciated assets
- Eliminating step-up in basis: Treating death as a realization event would close the loophole that allows gains to escape taxation entirely
- Deemed realization on borrowing: Some proposals would treat large loans secured by appreciated assets as taxable events, directly targeting the borrow-and-hold strategy
Each reform proposal carries complex implementation challenges and potential unintended consequences, ensuring this remains an active area of policy discussion.
Practical Implications for Non-Billionaires
While the scale differs dramatically, the underlying principles billionaires use can inform financial planning for individuals at various wealth levels. Anyone with appreciated assets can consider the tax implications of selling versus borrowing, particularly when facing large expenses.
Securities-backed lines of credit are available to investors with portfolios well below billionaire levels, often requiring account balances of $100,000 or more. For those with substantial appreciated assets in taxable accounts, borrowing against them rather than selling can preserve wealth and defer taxes, though the benefits must be weighed against the risks of leveraging investment portfolios.
Risks and Considerations
Despite its advantages, borrowing against assets carries inherent risks that even billionaires must manage. Market downturns can reduce portfolio values, potentially triggering margin calls that require additional collateral or forced liquidation. Rising interest rates increase borrowing costs, potentially eroding the financial advantage. And excessive leverage can amplify losses during market stress.
For billionaires with diversified holdings and substantial cushions, these risks are manageable. For individuals with smaller portfolios and less financial flexibility, the same strategies carry proportionally greater danger and require careful consideration with qualified financial and tax advisors.
References
- Internal Revenue Service – Capital Gains and Losses
- Internal Revenue Service – Estate Tax
- Internal Revenue Service – Net Investment Income Tax
- ProPublica – The Secret IRS Files
- U.S. Congress Joint Committee on Taxation – Tax Reform Reports