Stepped-up basis.
The largest tax lever for long-term holders.
When appreciated assets pass at death, the heirs inherit them at current market value as the new cost basiscost basisWhat you originally paid for an asset. Used to calculate how much profit (or loss) you made when you sell.Full definition. The embedded capital gainscapital gainsThe profit from selling an asset for more than you paid for it. Taxed differently depending on how long you held the asset. disappear. For anyone holding Bitcoin they bought cheap and held for decades, this one rule is the difference between keeping 80% of the appreciation and keeping 100% of it.
This page covers US-specific accounts and tax law. Outside the US? The priority order is the same, the account names differ (ISAIndividual Savings Account (ISA)A UK tax-advantaged account where contributions are post-tax but all growth and withdrawals are tax-free.Full definition in the UK, TFSATax-Free Savings Account (TFSA)A Canadian tax-advantaged account where contributions are post-tax but all growth and withdrawals are tax-free.Full definition/RRSPRegistered Retirement Savings Plan (RRSP)A Canadian tax-deferred retirement account; contributions reduce taxable income and growth is tax-deferred until withdrawal.Full definition in Canada, Super in Australia, etc.).
Viewpoint. Besides explaining the topic, this page makes the site’s case on money and Bitcoin. The facts are sourced; that case is the site’s view. How pages are labeled.
Check before acting. Rules described here reflect the law as of the update date above. Check for later changes before you act.
Buy 1 BTCBitcoin (BTC)The ticker symbol for Bitcoin, used on exchanges and in price quotes.Full definition at $10K. Hold. It is worth $1M when you die. Your heirs inherit it at a cost basis of $1M. They can sell the next day and owe zero federal capital gains tax. If you had sold at $1M yourself, you would have owed roughly $190K in federal tax on that gain. Stepped-up basis erases that entire liability. This is the single largest tax lever in the system for long-term holders, and the reason the borrow-until-you-die strategy exists. It is current law as of 2026. Proposals to eliminate it have been floated but have not passed.
On this page
What it is
Capital gains tax applies to the difference between what you paid for an asset (your cost basis) and what you sell it for. Sell a stock you bought for $10 at $100, you have a $90 gain.
When someone dies owning an appreciated asset, the IRS resets the cost basis to the fair market value on the date of death. The heir then owns the asset with that new, higher basis. If they sell shortly after, the gain is measured from date-of-death value, not from what the deceased originally paid.
Under current federal law, the embedded capital gain in an inherited asset is erased at death. The heir's tax basis "steps up" to the date-of-death market value, and the decades of appreciation become permanently tax-free for income tax purposes.
This is one of the oldest and most widely used provisions in the US tax code. It applies to Bitcoin the same way it applies to Apple stock or a family home.
Why Bitcoin holders specifically care
Bitcoin has a higher multiple of potential appreciation than almost any other asset a normal person owns. A holder who bought early and held to old age can easily see 100x or 1,000x gains. That is the regime where stepped-up basis goes from "nice to have" to "the most consequential rule in your plan."
Combine the high potential multiple with Bitcoin's tendency to appreciate through long cycles, and the math favors holding through retirement rather than selling in your 70s and 80s. The tax saved by holding to death can be larger than the income those sales would have produced.
The math, side by side
Assume a single filer with no other income and 1 BTC purchased at $10,000 cost basis. Worth $1,000,000 when you are 90. You die at 92 still holding.
0/15/20% LTCGLong-Term Capital Gains (LTCG)Profit from selling an asset held over one year, taxed at lower preferential rates than ordinary income.Full definition + 3.8% NIITNet Investment Income Tax (NIIT)A 3.8% extra federal tax on investment income for higher earners (above $200k single, $250k married).Full definition on $990K gain
Basis steps up to $1M, no gain
- Sale price: $1,000,000
- Cost basis: $10,000
- Taxable gain: $990,000
- Federal LTCG (0/15/20%) + NIIT (3.8%): ~$190K
- Heirs inherit: $810K cash
- Date-of-death value: $1,000,000
- Heirs' new basis: $1,000,000
- Heirs sell next day for $1,000,000
- Federal tax owed: $0
- Heirs inherit: $1,000,000 cash
The gap between the two outcomes is $190K. That is the value of doing nothing for two extra years. State income tax can widen the gap further depending on residency.
The strategy implication
The logical play for a long-term holder is to not sell in the final decades of life, and instead borrow against Bitcoin for cash needs. Collateralized Bitcoin-backed loans (Unchained, Ledn, and others) are not taxable events. You pledge BTC, receive dollars, spend them.
At death, the estate holds BTC and owes the loan. Heirs inherit BTC at stepped-up basis. They sell enough BTC to retire the loan (zero or negligible gain because basis was just reset). They keep the rest, tax-free on the appreciation.
This is the "buy, borrow, die" pattern Wall Street families have used for generations with appreciated stock. Bitcoin is a natural fit because collateralized lending markets exist, holding is friction-free, and the potential appreciation is large enough that the tax saved at the end dwarfs the interest paid along the way.
It is not free. Loan interest costs real money. Liquidation risk in a Bitcoin drawdown is real. The pattern only works if you size the loan conservatively and maintain a cushion. But for someone at 75 with an 8-figure stack and a desire to leave wealth to the next generation, the math is usually overwhelming.
Works for other appreciated assets too
Stepped-up basis is not a Bitcoin-specific provision. It applies to real estate, stocks, collectibles, private business interests, and almost everything else with an embedded capital gain.
- Family home bought in the 1980s. Bought for $50K, worth $800K, heirs inherit at $800K basis and sell tax-free.
- Long-held index funds. Decades of appreciation erased at death. Often larger in aggregate than people realize.
- Family business equity. Founder's basis can be near zero; stepped-up basis at death can save heirs enormous capital gains on sale.
Bitcoin is the most extreme case because the appreciation multiples can be the largest. The underlying rule is general.
Pending changes
Multiple administrations have proposed eliminating or capping stepped-up basis. The Biden administration floated a version in 2021 that would have treated death as a realization event above a threshold. The proposal did not pass. Subsequent proposals have been discussed in various forms.
As of 2026, stepped-up basis remains law in its traditional form. Any strategy built around it should be re-checked against current law before acting. Track proposed legislation; talk to your CPA annually if this is load-bearing for your plan.
Building a multi-decade plan around a single tax provision is risky if you cannot adapt. A flexible plan keeps the stepped-up basis advantage if it survives and has fallback options (Roth conversions, gifting, installment sales) if it is repealed or restricted.
Estate tax is a separate issue
Do not confuse stepped-up basis (income tax) with estate tax (wealth transfer tax). They are separate systems.
The federal estate tax exemption is $15 million per person in 2026 ($30 million married), made permanent and indexed for inflationinflationA general increase in prices over time, meaning each dollar buys less than it did before.Full definition by OBBBA. Estates below the exemption pay no federal estate tax. Estates above it pay up to 40% on the excess.
Several states also impose their own estate or inheritance taxes with lower thresholds. A stack that is immune from federal estate tax can still generate state tax liability.
Stepped-up basis operates regardless of estate tax. An heir who inherits an asset subject to estate tax still gets the basis step-up on income-tax capital gains. The two systems run in parallel.
Where to go from here
Sources
Figures, rates and rules change: check each source’s date before acting on it.
- IRC Section 1014 - basis of property acquired from a decedent - law.cornell.edu
- IRS Publication 551 - Basis of Assets - irs.gov
- IRS - Estate Tax and applicable exclusion amounts - irs.gov
- Tax Foundation - state estate and inheritance tax maps - taxfoundation.org
- Congressional Research Service - stepped-up basis proposals and scoring - crsreports.congress.gov
Last updated . Not legal advice. For anything material, consult an estate attorney. Disclosures · How pages are reviewed