Buy, Borrow, Die: How the Ultra-Wealthy Avoid Capital Gains Tax

The wealthiest Americans have long used a three-step strategy — Buy, Borrow, Die — to access the value of their appreciated assets without ever paying capital gains tax. The strategy works because U.S. tax law only taxes realized gains, meaning a gain only becomes taxable when an asset is sold. By borrowing against appreciated assets instead of selling them, the wealthy access cash tax-free. When they die, their heirs inherit those assets with a “stepped-up basis” that erases the built-up gain entirely. The result: a lifetime — and sometimes a generational — tax-free ride on investment gains that ordinary investors never get.

Step One: Buy

The strategy begins with purchasing assets that are expected to appreciate over time — publicly traded stock, real estate, a stake in a private business, or fine art. The key is holding, not selling. Every year an asset sits unsold, its appreciation goes untaxed. Under the realization principle embedded in the tax code, you owe no capital gains tax until you dispose of the asset. Jeff Bezos can watch Amazon stock climb from $18 to $180 per share and owe the IRS nothing — until the moment he sells.

For ordinary taxpayers, this creates a dilemma. You need cash to live, so eventually you sell. That triggers the gain, and you pay tax — up to 23.8% on long-term capital gains when you include the Net Investment Income Tax (NIIT). The wealthy have found a way around this problem.

Step Two: Borrow

Instead of selling appreciated stock to generate cash, the wealthy pledge their holdings as collateral and take out loans from banks or brokerage firms. These are commonly called securities-backed loans or portfolio loans.

Loan proceeds are not income under the tax code. The IRS treats a loan as a liability, not a receipt of income, because you are obligated to pay it back. This means borrowing $50 million against a stock portfolio triggers no taxable event — not ordinary income, not capital gains, nothing.

The strategy is surprisingly accessible at the top of the wealth scale. Large banks actively court ultra-high-net-worth clients with these products. Interest rates are often low (frequently tied to SOFR or a similar benchmark), and the interest itself may be deductible against investment income under IRC Section 163(d), adding another tax benefit.

The borrowed cash funds whatever lifestyle or investment expenses are needed — a yacht, a new venture, real estate — without a single dollar of tax consequence.

Step Three: Die

Here is where the strategy completes its full arc. Under IRC Section 1014, when a taxpayer dies, heirs inherit assets at their fair market value on the date of death, not at the original purchase price. This is called the stepped-up basis.

Consider the math. An investor buys stock for $1 million. By the time of death, it is worth $50 million. The unrealized gain is $49 million. Under ordinary rules, selling that stock would trigger nearly $11 million in federal capital gains tax. But if the investor never sells — instead borrowing against the stock throughout life — and then dies holding it, the heir inherits the stock with a $50 million basis. When the heir eventually sells, they pay capital gains tax only on appreciation above $50 million. The $49 million lifetime gain is permanently erased from the tax base.

The outstanding loans are repaid from the estate (often by selling a small portion of the inherited assets, now at their stepped-up basis), and the family retains the bulk of the wealth — having paid no capital gains tax at any point.

Why This Is Legal

The strategy is entirely legal, and it has been for decades. It exploits the intersection of three long-standing tax rules:

1. The realization requirement — gains are not taxed until a sale or exchange occurs
2. The non-taxability of loan proceeds — borrowed money is not income
3. The stepped-up basis at death (IRC §1014) — heirs receive a fresh cost basis equal to fair market value

None of these rules were designed with “Buy, Borrow, Die” in mind. The stepped-up basis was originally intended to simplify estate administration by avoiding the need to trace an asset’s original purchase price across potentially decades of ownership. As a practical matter, it became one of the most powerful tax benefits available to wealthy estates.

How Widespread Is This?

The strategy is not limited to Silicon Valley billionaires. Any investor with a sufficiently large, appreciated portfolio — think a family that built a regional business over 40 years — can use some version of it. The mechanics are the same; the scale differs.

A 2021 report from ProPublica, based on leaked IRS data, revealed that some of the wealthiest Americans paid effective federal income tax rates in the low single digits relative to the growth of their wealth — precisely because unrealized gains aren’t taxable and borrowing against them isn’t either.

The Policy Debate

“Buy, Borrow, Die” sits at the center of ongoing debates about wealth taxation and tax reform.

Proponents of the current system argue that taxing unrealized gains would create serious liquidity problems — forcing families to sell operating businesses or farms to pay tax bills on paper gains. They also note that assets do eventually enter the tax base if sold by heirs.

Critics argue that the stepped-up basis is a loophole that predominantly benefits dynastic wealth, allows trillions in gains to permanently escape taxation, and reduces the incentive to ever sell and redeploy capital. The Congressional Budget Office has estimated that repealing the stepped-up basis could raise hundreds of billions in revenue over a decade.

Proposals to address the strategy have included:

• Eliminating or capping the stepped-up basis, so heirs inherit the decedent’s original cost basis
• Mark-to-market taxation for very high earners, taxing unrealized gains annually
• Carryover basis, which was briefly enacted in 1976 before being repealed

As of now, none of these changes have been enacted into law, and “Buy, Borrow, Die” remains a fully available strategy.

What This Means for You

Unless your portfolio runs into the tens of millions, a true “Buy, Borrow, Die” strategy is likely out of reach — most banks require substantial, concentrated holdings as collateral. But the underlying principles hold lessons for any investor:

• Holding beats selling, at least from a tax perspective. Every year you defer a sale is another year of tax-free compounding.
• Stepped-up basis makes inherited assets particularly valuable. If you are doing estate planning, think carefully about which assets you hold until death versus which you gift now.
• Margin loans and securities-backed borrowing are available at most brokerages, though they carry significant risk — if asset values decline, you may face a margin call requiring you to sell at the worst possible time.

The ultra-wealthy use “Buy, Borrow, Die” because they can absorb that risk. For most investors, the more practical takeaway is simply this: the tax code rewards patience. Selling less and holding longer is one of the few legal tax strategies available at every wealth level.