Buy, Borrow, Die: How the Ultrawealthy Turn Asset Growth Into Tax-Free Wealth
Key Points
- Unrealized gains generally are not taxed until a realization event (often a sale), which lets wealth compound for years.[3]
- Borrowing can generate cash without selling because loan proceeds typically are not income (but cancellation of debt can be taxable).[8]
- At death, many assets receive a basis “step-up” to fair market value, which can wipe out decades of built-in gain for income tax purposes.[1]
On this page
- What “Buy, Borrow, Die” actually means
- The core concept: unrealized gain isn’t taxed until you sell
- Step one: Buy
- Step two: Borrow
- Step three: Die (step-up in basis)
- Caveat: estate tax still exists
- Why borrow can beat sell (even with interest)
- Trust planning and the step-up tradeoff
- Common questions and misconceptions
- A smaller example for business owners
- Next steps
What “Buy, Borrow, Die” actually means
“Buy, Borrow, Die” is shorthand for a strategy that leverages one of the most important structural features of the U.S. tax system: in many situations, you do not pay income tax simply because an asset goes up in value. Instead, gain is generally taxed when it becomes realized, often when you sell or otherwise dispose of the asset.[3]
In the real world, “Buy, Borrow, Die” planning is an oversimplification. When it’s done at a high level, it can involve years of coordinated tax, finance, and estate planning, and the details matter a lot.
Plain-English summary: Wealth grows inside appreciating assets. Instead of selling (and triggering tax), the owner borrows against those assets to fund lifestyle costs. If the owner dies holding the assets, heirs may inherit them with a new basis at fair market value, shrinking or eliminating the income tax on the built-in gain.[1]
The core concept: unrealized gain isn’t taxed until you sell
If you buy an asset for $1 million and later it’s worth $5 million, you have a $4 million gain. But that gain is typically unrealized until you sell or otherwise have a realization event. In general, gain from a disposition is computed by comparing the amount realized to your adjusted basis.[3]
This is why some wealthy taxpayers can see their net worth rise dramatically while reporting relatively modest taxable income: appreciation is a timing story, and timing drives compounding.
Step one: Buy
Imagine an entrepreneur named Fred. Fred buys an asset (a large stock position, real estate, or private business equity) for $50 million. That $50 million is his basis: generally, his investment in the property used to compute gain or loss on disposition.[2]
Assume the asset grows at 8% annually and is worth about $108 million after ten years. Fred has a built-in gain of $58 million. If Fred sells, he triggers a taxable event and may owe long-term capital gains tax. High earners may also owe the 3.8% Net Investment Income Tax (NIIT) on certain investment income.[4]
Why this matters: Selling converts appreciation into taxable gain, which reduces the capital left to reinvest. Less reinvestable capital can mean less compounding over time.
Step two: Borrow
Instead of selling, Fred borrows against the asset. Private banks and wealth lenders may extend credit against strong collateral (often with conservative loan-to-value terms). The key tax point: loan proceeds generally are not treated as taxable income, because borrowing comes with an obligation to repay. In contrast, if debt is later canceled or forgiven, that can create taxable income in many cases.[8]
So Fred pledges the appreciated asset and obtains (for example) a $90 million line of credit. Fred now has spendable cash, but he still hasn’t sold, meaning he generally hasn’t realized gain merely by borrowing.
In practical terms: Borrowing can function like a private ATM. The investor spends loan proceeds while the underlying assets continue to compound, without a sale-driven capital gains event.
Step three: Die (the step-up in basis can erase income tax on the gain)
At death, many assets included in a decedent’s estate receive a new basis equal to fair market value as of the date of death (or an alternate valuation date in some cases). This is the “step-up in basis” rule under IRC § 1014.[1]
If Fred bought the asset at $50 million and it’s worth $740 million when he dies, his heirs’ basis may become $740 million. If the heirs sell immediately for $740 million, the taxable gain can be close to zero because sale proceeds roughly equal basis.[1]
Important exception concept: Not everything gets a step-up. For example, certain items treated as income in respect of a decedent (IRD) generally do not receive basis step-up in the same way.[6]
Caveat: estate tax still exists
“Buy, Borrow, Die” doesn’t necessarily mean “no tax.” Even if income tax on appreciation is minimized through a basis step-up, estate tax may still apply depending on exemptions, deductions, charitable planning, and lifetime transfers. The federal estate tax rate can reach 40% on amounts above the applicable exclusion (subject to annual changes in the exemption amount).[5]
This is why the highest-net-worth version of the strategy is often integrated with trust planning, valuation planning, liquidity planning, and other estate techniques.
Why “Borrow” can be better than “Sell” even if you pay interest
A natural question is: why pay interest at all? Because selling appreciated assets creates an immediate tax cost that permanently reduces reinvestable capital. Interest is often a carrying cost that can be refinanced, managed, or deferred, while the underlying portfolio continues to compound.
Said differently: for taxpayers with massively appreciated assets, the tax cost of selling can be larger than the interest cost of borrowing, especially if the investor expects a basis step-up at death to reduce income tax on appreciation.
Reality check: Favorable borrowing terms usually require strong collateral, careful underwriting, and access to the right lenders. Market volatility and interest-rate risk can materially change outcomes.
How trust planning can reduce estate tax and still preserve the step-up
Sophisticated planning tries to solve two problems at once: income tax (capital gain) and estate tax. But there’s a tradeoff: removing assets from the taxable estate through lifetime gifts can reduce estate tax exposure, yet may also eliminate the step-up that applies to assets included in the estate at death under IRC § 1014.[1]
Advanced strategies often seek balance: keep enough estate inclusion to obtain basis step-up, while using leverage, deductions, charitable techniques, and trust structuring to reduce estate tax exposure. This can involve complex, fact-specific planning and must be implemented carefully.
Also important: Modern reporting rules can require basis consistency for certain inherited property, tying the beneficiary’s basis to the value reported for estate tax purposes in many situations.[7]
Common questions and misconceptions
Is this legal?
The phrase sounds like a hack, but the core building blocks are grounded in longstanding rules: unrealized gains generally aren’t taxed until disposition, loan proceeds are generally not income, and inherited basis is generally fair market value at death for many assets.[1][8] That said, implementation matters enormously. Aggressive or abusive reporting, improper valuation, or disguised transactions can create serious legal exposure.
Does everyone get a step-up in basis?
Many inherited assets receive a step-up under IRC § 1014, but not everything does. For example, IRD items generally have special rules and may not receive the same basis treatment.[6] In addition, basis consistency rules can apply for certain inherited property where an estate tax return is required.[7]
What about the loans? Do they just disappear?
No. Someone must repay the loans. A common model is that after death, the estate or heirs sell assets (often with a stepped-up basis) and use proceeds to repay debt. If assets are illiquid, estates may need liquidity planning (insurance, refinancing, staged sales, or other strategies) to manage repayment timelines.
Why do people criticize “Buy, Borrow, Die”?
Critics often focus on the step-up in basis, arguing that it can allow large amounts of unrealized appreciation to permanently avoid income tax. That debate is ultimately a policy question: whether the benefits of the rule outweigh distributional and revenue concerns.
A smaller example: how it shows up for business owners
Even if you’re not ultra-wealthy, the mechanics can matter. If you own a business worth $5 million with a very low basis and you sell, you may owe significant capital gains tax. If instead you borrow against the business (or refinance commercial real estate held in the business), you can potentially extract cash without selling.
At death, heirs may receive a step-up in basis depending on ownership and structure. The effect can be meaningful even at smaller levels, though the highly optimized “ultra-wealth” version typically involves more complex estate planning.
Next steps
If you’re a business owner, investor, or high-income professional building long-term wealth, understanding when to sell, when to borrow, and how basis works at death can materially change outcomes. The right strategy depends on your facts, risk tolerance, liquidity needs, and estate plan.
Learn more about how we support business owners with tax and planning issues through our website: Iqbal Business Law.
References
- IRC § 1014 (Basis of property acquired from a decedent). https://www.law.cornell.edu/uscode/text/26/1014 ↩
- IRS Publication 551, Basis of Assets (general basis concepts). https://www.irs.gov/pub/irs-pdf/p551.pdf ↩
- IRS Publication 544, Sales and Other Dispositions of Assets (gain computed as amount realized minus adjusted basis). https://www.irs.gov/pub/irs-prior/p544–2016.pdf ↩
- IRS, Net Investment Income Tax (NIIT) under IRC § 1411 (3.8% tax on certain net investment income, subject to thresholds). https://www.irs.gov/newsroom/questions-and-answers-on-the-net-investment-income-tax ↩
- IRS, Estate Tax overview (rate and general framework). https://www.irs.gov/businesses/small-businesses-self-employed/estate-tax ↩
- IRC § 691 (Income in respect of a decedent). https://www.law.cornell.edu/uscode/text/26/691 ↩
- IRC § 1014(f) and IRC § 6035 (basis consistency and reporting rules for certain inherited property). https://www.law.cornell.edu/uscode/text/26/1014 and https://www.law.cornell.edu/uscode/text/26/6035 ↩
- IRS, Canceled debts and why forgiveness can be taxable (illustrates the general principle that borrowed funds are typically not income, but cancellation can create income). https://www.irs.gov/taxtopics/tc431 ↩
