How the Rich Stay Rich: Buy, Borrow, Die — and the Tax Code Behind It

Between 2014 and 2018, the 25 wealthiest Americans grew their fortunes by about $401 billion. Over the same five years they paid $13.6 billion in federal income tax. ProPublica, which obtained the underlying IRS data, called that a “true tax rate” of 3.4% — tax paid measured against how much richer they got. The average American household pays an effective federal income-tax rate of about 14.1%, per Tax Foundation analysis of IRS data.

Almost none of what the wealthy did was illegal. That is the uncomfortable part, and the reason this is a mechanism and not a scandal. The rules are public. The strategy even has a name — Buy, Borrow, Die — and it is studied by tax economists, including The Budget Lab at Yale. Let us take it apart in order: cause, mechanism, consequence. And then the honest part — why it is smaller than the headlines suggest, and why you can’t copy it.

One clarification before we start: ProPublica’s 3.4% (tax ÷ wealth growth) and the 14% average (tax ÷ taxable income) use different denominators on purpose. The comparison is not a sleight of hand — it is the whole point. The system taxes income, and the wealthy arrange to have very little of it.

Cause: the tax code taxes income, not wealth

Everything starts with one rule. US income tax is levied on realized income — money you actually receive — not on unrealized gains, the paper value of assets you still hold. The IRS states it plainly in Topic 409: a capital gain or loss is recognized only when a capital asset is sold or disposed of.

So if you buy a stock for $1 million and it grows to $50 million, the $49 million gain is invisible to the IRS for as long as you never sell. On paper you are vastly richer. On your tax return, nothing happened.

Now contrast that with a salary. As covered in how money actually works, wages are taxed at the source: your employer withholds federal income tax and payroll tax from every paycheck before you ever touch the money. A wage-earner cannot defer, cannot wait, cannot choose the timing. An asset-holder can do all three. That asymmetry — taxed-immediately income versus taxed-only-if-sold wealth — is the cause of the entire strategy.

Mechanism: Buy, Borrow, Die in three moves

Step 1 — Buy (and never sell)

Acquire appreciating assets — stock, founder’s equity, real estate, a private company — and hold them. Because the gains are unrealized, they are never taxed. The wealth compounds untaxed, year after year. The Federal Reserve’s Distributional Financial Accounts confirm the structural setup: the very top of the wealth distribution holds disproportionately in corporate equity and business assets, not in salary. The richest people, by design, have almost no taxable income relative to their net worth. This is the engine behind why wealth compounds for the 1%.

Step 2 — Borrow against the assets

You still need cash to live. Selling would trigger the capital-gains tax you have been avoiding — so instead, you borrow. Banks offer securities-backed lines of credit (SBLOCs), described by FINRA as loans collateralized by a securities portfolio. It works like a home-equity loan, but your stock is the collateral and you never have to sell it.

Here is the keystone, straight from IRS Publication 525: loan proceeds are not income. Borrowed money is not taxed, because it carries an obligation to repay. So you receive spendable cash, tax-free, while the underlying assets keep compounding untouched. This is the core of how billionaires use debt.

The arithmetic only works because borrowing can be cheaper than the tax that selling would trigger. Yale’s Budget Lab estimates the current-law tax rate on borrowing is roughly 12 percentage points below the rate on selling. A very large, low-margin credit line can carry a low interest rate; selling instead would mean paying up to 20% in long-term capital-gains tax plus a 3.8% surtax for top earners. When the loan costs less than the tax, borrowing wins.

Step 3 — Die (the step-up in basis)

The loan still has to be repaid eventually. The strategy’s final move handles that through death. Under Internal Revenue Code §1014, when assets pass to heirs, their cost basis is “stepped up” to the fair market value on the date of death. A lifetime of unrealized gains is erased for income-tax purposes. Heirs can sell immediately and owe little or no capital-gains tax; the estate repays the loans from the now-untaxed assets.

Buy so nothing is taxed. Borrow so you never have to sell. Die so the gains vanish. Three legal steps, each ordinary on its own, lethal in combination.

Step	The move	The rule it uses	Tax consequence
Buy	Hold appreciating assets, never sell	Realization principle (IRS Topic 409)	Gains unrealized = untaxed
Borrow	Take a securities-backed loan for cash	Loan proceeds not income (IRS Pub. 525)	Cash received, tax-free
Die	Pass assets to heirs at death	Step-up in basis (IRC §1014)	Lifetime gains erased for income tax

Sources: IRS Topic 409; IRS Publication 525; IRC §1014. See also The Budget Lab at Yale (2025).

The honest part: it is real, but smaller than the headlines

The moat of this brand is the receipts, and the receipts force two qualifiers the viral version always skips.

First, “Die” does not always mean tax-free. The income tax is erased, but the estate tax is a separate levy. The IRS estate tax rules impose up to a 40% rate on estates above a roughly $15 million per-person exemption in 2026 (about $30 million per couple). For the genuinely ultra-wealthy, the estate tax is the real backstop — though planning structures like trusts exist to soften it, the subject of how trusts protect wealth.

Second, the scale is modest relative to the outrage. Yale’s Budget Lab finds borrowing amounts to only about 1% of the income of the top 0.1% by net worth, and that the main reform options would raise roughly $100–150 billion over ten years — real money, but not the budget-fixing windfall the headlines imply. The mechanism is genuine; its magnitude is bounded.

Consequence: why you can’t copy it

People watch this explained and ask the natural question — how do I do it? The honest answer is that you almost certainly can’t, for three structural reasons:

1. You need large, appreciating assets as collateral. A salary cannot be borrowed against this way. The strategy is built for people whose wealth is already in stock and property, not in wages.
2. Your income is taxed at the source. Wages are withheld every payday, before you hold them. You never get the deferral that makes Step 1 work.
3. The step-up only helps your heirs. Its benefit lands after you die. It does nothing for your own cash flow during your life.

So the deeper consequence is not a life hack — it is a description of how the system distributes its advantages. Income is taxed promptly and fully; wealth is taxed lightly and only on the owner’s terms. That single asymmetry, compounding across decades, is one of the cleanest explanations for how the rich stay rich and why wealth concentrates even without anyone breaking a rule. If you want to feel why timing and tax-drag matter so much over a lifetime, run two scenarios through the compound interest calculator — one taxed annually, one taxed never — and watch the gap widen.

The machine in one paragraph

Cause: the US taxes realized income, not unrealized wealth, while taxing wages at the source. Mechanism: Buy appreciating assets and never sell (no realization, no tax); borrow against them for tax-free cash (loans aren’t income); die and let the step-up in basis erase a lifetime of gains. Consequence: the wealthy convert untaxed asset growth into spendable cash and pass it on largely free of income tax — legally — which is why their effective rate on getting richer can be a fraction of a wage-earner’s, and why a salary can’t replicate it. The receipts also keep it honest: the estate tax and the modest scale mean the loophole is real but bounded.

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This article explains how the tax system works. It is educational and is not financial, tax, or legal advice. Figures are dated and, where noted, rounded, directional, or illustrative. Consult a qualified professional for your own situation.