If you bought Apple stock in 1995 and sold it tomorrow, you’d owe capital gains tax on roughly all of it. If you die holding it tomorrow and your kids sell it the next day, the gain disappears. That single line in the tax code — the step-up in basis — moves more untaxed wealth between generations than the estate tax ever has.
Economists across the political spectrum quietly agree it’s indefensible. And yet it has survived every reform push since the 1970s, including a brief 2010 experiment that lawmakers reversed within a year.
How a single rule erases trillions
When an asset passes at death, its cost basis “steps up” to the fair market value on the date of death. Decades of accumulated gains — in stocks, real estate, private businesses, art — vanish from the tax base. The Joint Committee on Taxation has estimated the cost at over $40 billion a year, and Treasury analyses suggest the lifetime figure is far higher because it compounds with every generation that holds appreciating assets.
The result is a system in which the wealthiest households can convert lifetimes of unrealized gains into permanently untaxed inheritance. A middle-class worker pays tax on every dollar of wage income; a billionaire’s heir pays nothing on a century of compounding.
Why every reform attempt has died
Biden proposed treating death as a realization event in 2021. It lasted weeks before farm-state Democrats killed it. Obama floated a similar idea in 2015. Carter’s team studied it. The 2010 experiment with carryover basis was so administratively chaotic — heirs couldn’t reconstruct decades-old purchase records — that Congress retroactively repealed it.
The political problem is that the loophole is invisible to most voters but existential to a narrow coalition: family farms, closely held businesses, and the donor class. Each group commissions sympathetic case studies — the dairy farm forced into a fire sale, the third-generation hardware store — and lawmakers in both parties retreat. The estate tax exemption keeps rising, which makes step-up matter more, not less.
The administrative excuse is real but oversold
Defenders argue that calculating original basis on assets held for 50 years is impossible. That’s partially true — but other countries manage. Canada treats death as a deemed disposition. Australia uses carryover basis with documented exceptions. The IRS already requires basis reporting for brokerage accounts opened after 2011, which covers a growing share of household wealth.
The real obstacle isn’t recordkeeping. It’s that any serious reform would force the wealthiest 1% to recognize gains they’ve structured their entire estate plans around deferring forever. The lobbying response would be ferocious, and the political payoff diffuse.
The takeaway
The step-up in basis is the rare tax provision that nearly every economist agrees is bad policy and nearly every politician agrees is untouchable. It will likely outlive most readers of this article. The honest conclusion isn’t that reform is impossible — it’s that the coalition defending it is small, organized, and effective, while the coalition that would benefit from repeal is large, distracted, and unaware the rule even exists.
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