Step-Up in Basis: The Tax Case for Holding Appreciated Assets Until Death
June 30, 2026 • By Travis McShane, CFA, CFP®
The Hidden Tax Advantage Many Investors Overlook
When investors think about taxes, they often focus on deductions, retirement accounts, or strategies to reduce ordinary income. Yet one of the most valuable tax benefits available under current U.S. tax law is frequently overlooked: the step-up in basis.
For individuals who have accumulated significant wealth through investments, real estate, or business ownership, this provision can dramatically reduce the taxes their heirs may ultimately pay. In some cases, it can eliminate decades of unrealized capital gains taxes altogether.
This doesn't mean investors should never sell appreciated assets during their lifetime. However, understanding how the step-up in basis works can help families make more informed decisions about investing, gifting, estate planning, and wealth transfer.
Let's take a closer look at why holding appreciated assets until death often creates the greatest after-tax benefit for future generations.
Understanding Cost Basis and Capital Gains
Before discussing the step-up in basis, it's important to understand two key concepts: cost basis and capital gains.
Your cost basis is generally what you paid for an asset, including certain adjustments such as transaction costs or capital improvements.
For example:
You purchase shares of stock for $50,000.
Ten years later, the stock is worth $250,000.
Your cost basis remains $50,000, and your unrealized gain is $200,000.
If you sell the investment, you will typically owe capital gains tax on the gain:
Sale Value: $250,000
Cost Basis: $50,000
Taxable Gain: $200,000
Depending on your income level and state of residence, the combined federal and state tax burden can be substantial.
For affluent investors, federal long-term capital gains rates may reach 20%, plus the 3.8% net investment income tax (NIIT). State taxes could further increase the overall tax burden.
As a result, selling appreciated assets can trigger significant tax liabilities.
What Is a Step-Up in Basis?
A step-up in basis occurs when an asset passes to heirs at death.
Under current U.S. tax law, most inherited assets receive a new cost basis equal to their fair market value as of the owner's date of death (or an alternate valuation date if elected by the estate).
In practical terms, this means the unrealized gain that accumulated during the original owner's lifetime may disappear for income tax purposes.
Consider this example:
Original purchase price: $100,000
Value at death: $600,000
The heir's new basis generally becomes $600,000.
If the heir immediately sells the asset for $600,000, there may be little or no taxable capital gain because the sale price and the stepped-up basis are essentially the same.
The $500,000 gain that accumulated during the decedent's lifetime effectively escapes capital gains taxation.
This feature makes the step-up in basis one of the most powerful wealth-transfer benefits available to investors.
A Simple Example: Sell Now vs. Hold Until Death
To understand why this matters, let's compare two scenarios.
Scenario 1: Sell During Life
Mary purchased a stock portfolio for $200,000 many years ago.
The portfolio is now worth $1,000,000.
If Mary sells today:
| Item | Amount |
|---|---|
| Current Value | $1,000,000 |
| Original Basis | $200,000 |
| Taxable Gain | $800,000 |
At a combined federal and state tax rate of 30%, the tax bill could be approximately:
$800,000 × 30% = $240,000
After taxes, Mary would retain approximately $760,000.
Scenario 2: Hold Until Death
Instead, Mary continues holding the portfolio until her death.
At that time:
| Item | Amount |
|---|---|
| Value at Death | $1,000,000 |
| New Stepped-Up Basis | $1,000,000 |
If her children inherit the portfolio and sell shortly thereafter for $1,000,000, their taxable gain may be minimal.
In this case, the family potentially avoids taxes on the entire $800,000 appreciation.
The difference between the two outcomes can amount to hundreds of thousands of dollars.
Why Holding Appreciated Assets Often Creates More After-Tax Wealth
For many families, the goal isn't simply maximizing investment returns. It's maximizing after-tax wealth.
The step-up in basis can be especially valuable because it addresses a tax liability that may have accumulated over decades.
Long-Term Investors Benefit Most
The longer an asset has appreciated, the larger the potential tax savings.
Examples often include:
Concentrated stock positions
Rental properties held for decades
Family businesses
Low-basis mutual funds
Appreciated ETF portfolios
Many investors are surprised to discover that some of their largest embedded tax liabilities are hidden within assets they purchased years—or even decades—earlier.
Tax Deferral Has Value
Even before considering a step-up in basis, investors benefit from deferring taxes.
When taxes remain unpaid, more capital stays invested on your own balance sheet and continues compounding.
By not selling appreciated assets, investors may benefit from both:
Ongoing tax-deferred growth, and
Potential basis adjustment at death.
This combination can significantly increase family wealth over time.
Real Estate Example
Real estate owners often experience some of the most dramatic benefits from the step-up in basis and have additional tools such as 1031 exchanges that can continue deferring taxes over long stretches of time.
Consider Don, who purchased a rental property in 1995 for $300,000.
Today, the property is worth $2 million.
If Don Sells During Life
| Item | Amount |
|---|---|
| Sale Price | $2,000,000 |
| Basis | $300,000 |
| Gain | $1,700,000 |
In addition to capital gains taxes, Don may also face depreciation recapture taxes.
The combined tax burden could be substantial.
If Don Holds Until Death
Assume the property is worth $2 million when inherited by his children.
Under current law:
New basis = $2 million
Prior appreciation generally disappears for capital gains tax purposes
If the children sell shortly thereafter for approximately $2 million, they may owe little or no capital gains tax.
For families with significant real estate holdings, this can represent one of the largest tax-saving opportunities available.
Business Interests Can Also Benefit
Privately held business interests may also receive a step-up in basis when transferred through an estate.
Many business owners spend decades building enterprise value.
A company that began as a modest startup may ultimately be worth millions of dollars.
Holding such interests until death can allow heirs to inherit assets with a significantly higher tax basis than the founder originally had.
The resulting tax savings can be considerable, particularly when future sales or liquidity events occur after inheritance.
When Selling During Life May Still Be the Right Move
Although the step-up in basis is powerful, it should not automatically dictate investment decisions.
There are many situations where selling appreciated assets still makes sense.
Portfolio Rebalancing
Tax considerations should not override sound investment management.
An investor whose portfolio has become heavily concentrated in a single stock may face significant risk.
Selling part of the position—even if taxes are owed—may improve diversification and reduce exposure to a single company or sector.
Charitable Giving Strategies
Highly appreciated assets can be especially attractive charitable gifts.
Donating appreciated securities directly to qualified charities may allow the donor to:
Avoid capital gains tax
Potentially receive a charitable deduction
Support philanthropic objectives
In these cases, gifting may be more advantageous than either selling or holding until death.
Liquidity Needs
Sometimes investors simply need access to cash.
Funding retirement spending, purchasing real estate, assisting family members, or financing healthcare costs may justify realizing gains.
The investment strategy should support the investor's lifestyle and objectives—not the other way around.
Potential Tax Law Changes
Tax laws can change over time.
Future legislation could alter capital gains rates, estate tax rules, or basis treatment.
While current law provides for a step-up in basis at death, prudent planning should remain flexible enough to adapt to future changes.
Common Mistakes and Misconceptions
"I Should Never Sell Appreciated Investments"
Not necessarily.
Taxes are important, but they are only one part of a comprehensive financial plan.
An overconcentrated portfolio, a changing risk tolerance, cash-flow needs, or investment opportunities may outweigh the tax benefits of continuing to hold an asset.
The right answer depends on the investor's broader goals.
"My Heirs Will Owe Estate Tax and Capital Gains Tax on the Entire Value"
This is a common misunderstanding.
Estate tax and capital gains tax are separate concepts.
Many inherited assets receive a stepped-up basis, reducing or eliminating capital gains tax on prior appreciation. Whether an estate owes estate tax depends on separate federal and state estate tax rules and the value of the estate.
Under today’s laws, the federal estate tax exemptions are quite high at $15M per individual, so most households do not need to worry about this additional layer of taxes.
"Step-Up in Basis Eliminates All Taxes"
Not entirely.
The step-up in basis generally addresses unrealized capital gains accumulated during the decedent's lifetime.
However:
Estate taxes may still apply in certain circumstances (i.e., very large estates).
Future appreciation after inheritance remains taxable.
Some assets may have unique rules and exceptions.
The step-up is powerful, but it is not a universal tax exemption.
Key Takeaways
The step-up in basis remains one of the most valuable tax benefits available under current U.S. tax law.
For investors who own highly appreciated stocks, ETFs, mutual funds, real estate, or business interests, holding assets until death can significantly reduce—or even eliminate—the capital gains taxes that would otherwise be owed on decades of appreciation.
That said, tax efficiency should not operate in isolation. Investment risk, diversification, liquidity needs, charitable objectives, estate planning considerations, and family goals all play important roles in determining the most appropriate course of action.
The most effective strategies are typically developed within the context of a comprehensive financial plan that considers both current needs and long-term legacy objectives.
Interested in learning how a financial advisor can help you make the most of strategies like the step-up in basis? Click here to schedule an introductory call with one of our advisors.