11 Things to Know About a Step-Up in Cost Basis
If you purchase an asset (e.g., a stock) and sell it for a profit later on, you probably already know capital gains taxes apply. What if you didn’t initially purchase the asset, though, and instead inherited it? How do capital gains taxes work in that case? Fortunately, a tax provision commonly known as the “step-up in cost basis” can limit your tax liability by a significant degree. This article covers 11 important things to understand about this provision.
Key Takeaways
- What it does: Under IRC Section 1014, inherited assets generally receive a cost basis reset to fair market value at the date of death—often wiping out years of unrealized appreciation from an heir's future capital gains bill.
- It can go either way: If an asset is worth less at death than its original basis, the adjustment steps down (more like a basis adjustment rather than strictly a step-up).
- Not every asset qualifies: Traditional IRAs, 401(k)s, pensions, annuities, and CDs don't receive a step-up, meaning two inheritances of equal dollar value can have very different after-tax outcomes.
- Gifts vs. inheritance: Lifetime gifts use carryover basis (the donor's original cost), while bequests at death receive the step-up (a key reason to weigh timing before transferring appreciated property).
- Ownership matters: Community property states step up the full asset at the first spouse's death, while common-law states adjust only the deceased spouse's share (with trusts sometimes complicating eligibility).
1. Understand cost basis and capital gains.
First, let’s clarify what “cost basis” means. While an asset's cost basis is generally based on the amount paid to acquire it, various expenses or reductions over time can impact this figure. Cost basis matters. Why? Because it’s used to calculate the gain or loss when an asset is eventually sold. For example, if you buy an investment for $50,000 and eventually sell it for $150,000 (assuming no other adjustments to your basis), you’d realize a $100,000 capital gain and owe capital gains taxes on that amount. The concept can apply to many different assets including stocks, mutual funds, real estate, business interests, and collectibles.
2. Inherited assets generally receive a new cost basis.
Per Internal Revenue Code Section 1014, the cost basis of property acquired from a decedent is typically adjusted to its fair market value at the date of death. Consider the previous example of a $50,000 asset appreciating to $150,000; with the investment worth $150,000 at the time of the owner’s passing, the beneficiary receives a “step up” in its cost basis (the $100,000 in appreciation during the original owner's lifetime typically excluded from the beneficiary's future capital gains calculation). While there is typically no capital gain if the beneficiary sells the asset soon after inheriting it, holding onto the shares and later selling them for $175,000 would generally subject only the $25,000 of appreciation above the new $150,000 basis to capital gains tax: a significant estate and tax planning advantage for beneficiaries.
3. A step-up can actually be a step-down.
Although the term “step-up in basis” is often used, the basis adjustment doesn't always move upward. More specifically, the beneficiary's basis may adjust downward if an asset is worth less at the owner's death than its existing basis. If someone purchased property for $300,000 but its fair market value drops to $250,000 at the time of the owner’s death, for example, the beneficiary's new basis would generally be $250,000 (not $300,000) should the property qualify for an adjustment. It’s thus often more accurate to think of the rule as a basis adjustment at death rather than simply a step-up, a distinction sometimes especially important when an estate has volatile investments, depreciated real estate, or other assets that have lost value.
4. Not all inherited assets receive a step-up.
- Stocks, mutual funds & ETFs in taxable accounts
- Real estate
- Many business interests
- Collectibles and other property
- Traditional IRAs
- 401(k)s and other tax-deferred plans
- Pensions
- Annuities
- CDs
While step-up rules typically apply to inherited capital assets such as stocks and other investments held in taxable accounts, real estate, some business interests, and other property, not every inherited asset qualifies for a step-up in basis. This includes tax-deferred retirement accounts—such as traditional IRAs or 401(k)s—as well as CDs, pensions, and annuities. Knowing which assets qualify is important since two inheritances with identical dollar values can have very different tax implications attached to them.
5. Inheriting an asset differs from receiving it as a gift.
Remember, a step-up in basis applies only when an asset is inherited after death with lifetime gifts generally subject to carryover basis rules (and the recipient taking on the donor's existing basis instead of receiving one adjusted to the asset’s current market value). If a living parent bought a stock for $20,000 now valued at $150,000 and gifts the shares to an adult child, for example, the child generally assumes the parent’s $20,000 basis—selling the shares for $150,000 triggering a sizable capital gain. If the parent retains ownership until death and the child inherits the stock at its $150,000 value, however, the basis steps up to $150,000 with perhaps little to no capital gains tax due if the shares are then sold at or near that same value. Still, holding appreciated assets until death isn’t always the best strategy since gifting can help achieve various estate-planning, charitable, or family goals. The potential loss of a future basis step-up is an important factor to weigh, though, before transferring highly appreciated property.
6. The value of an asset at the date of death typically establishes its new tax basis.
Since the basis of inherited property is generally tied to its fair market value at the time of death, accurately determining and documenting that same value is often a critical part of effective estate administration. While establishing this is relatively straightforward for publicly traded stocks, valuing real estate, privately held businesses, collectibles, and other assets in the absence of readily available market prices is often much more complex—an appraisal often necessary to determine the property's fair market value. Maintaining thorough documentation is also particularly important since the basis may not become relevant until years after the inheritance occurs. If you inherit a house and sell it 15 years later, for example, you’ll need to know both the sale price and property's value at the time of inheritance to accurately calculate any capital gain.
7. How a step-up in basis works in community property states.
In community property states (Arizona, California, Idaho, Louisiana, New Mexico, Nevada, Texas, Washington, and Wisconsin), property acquired by a married couple is typically considered community property with each spouse generally owning an equal one-half interest. Upon the death of one spouse, federal tax law generally allows a step-up in basis for the entire community property asset rather than just the deceased spouse’s half—with the basis of the entire asset adjusted to its fair market value as of the date of death. Consider a married couple who buy a community property for $400,000. If, at the time of one spouse’s death, the property has appreciated to $1 million and qualifies for this rule, the basis for the entire asset is stepped up to $1 million. Should the surviving spouse then sell the property for $1 million, there likely would be little or no capital gain from the appreciation that occurred before their spouse's death.
8. How a step-up in basis works in common law states.
In a common-law state, jointly owned property typically doesn’t receive a full step-up in basis when one spouse dies—with only the deceased spouse's share of the property receiving a basis adjustment to its fair market value, the surviving spouse's existing interest generally retaining its original basis. The outcome ultimately depends on how the property is titled and applicable federal and state laws. If spouses in a common-law state each own half of an asset that originally cost $200,000 and is worth $1 million when one spouse dies, for example, the deceased spouse’s $100,000 share is stepped up to $500,000 while the widow(er)’s $100,000 share keeps its original basis. The widow(er)’s combined basis in the asset thus becomes $600,000, much less than the $1 million basis possible with a full step-up in community property states.
9. Trusts can complicate step-up rules.
Many people assume that placing an asset in a trust will automatically guarantee or prevent a step-up in basis. In reality, this all depends on the specific type of trust and its structure. One key consideration? Whether the property is treated as part of a deceased person's gross estate for federal estate-tax purposes. Property held in some revocable trusts may still qualify for a basis adjustment at the grantor's death, for example, since it’s still included in the grantor's estate. Irrevocable trust arrangements are often more complicated, with assets removed from a person’s taxable estate perhaps no longer eligible for a basis adjustment when that person passes away.
This dynamic creates an important estate-planning tradeoff. Strategies designed to remove assets from an estate for estate-tax purposes can result in different income-tax outcomes compared to strategies keeping highly appreciated property in the estate, potentially allowing for a basis adjustment. It’s for this reason that it’s likely wise to review estate plans created years ago since changes in asset values, tax laws, and a family's financial situation can all shift the balance between estate-tax planning and income-tax planning.
10. Inherited capital assets often qualify for long-term capital gains treatment.
One key rule relates to the holding period of inherited capital assets. While a capital gain is typically considered short-term or long-term based on how long the investor held the asset before selling, inherited capital assets are generally granted long-term capital gains treatment no matter how briefly the beneficiary holds them. If you inherit stock in June and sell it in August, for example, your gain or loss is considered long-term even though you held the shares for only two months.
11. A step-up in basis is often an important part of estate planning.
The step-up in basis is not just something heirs should consider after an inheritance is received as it can significantly influence financial decisions made years before assets are transferred. Imagine a retiree with $200,000 in cash, a $750,000 traditional IRA, $500,000 of highly appreciated stock in a taxable brokerage account, and a rental property purchased decades ago for far less than its current value. While each of these assets adds to the retiree’s net worth, tax implications of spending, gifting, or bequeathing each one can vary dramatically. Just as gifting highly appreciated stock during life may pass the donor’s low cost basis to the recipient, selling the stock during retirement can trigger significant capital gains taxes. Holding the shares until death, meanwhile, could allow heirs to receive a step-up in basis and thus possibly reduce their tax burden. Leaving a traditional IRA to heirs involves a different set of tax considerations altogether, as retirement accounts typically don’t receive a step-up in basis.
A universally “best” order for spending or transferring assets quite frankly doesn’t exist, with factors such as income needs, charitable intentions, estate and gift taxes, state tax laws, investment risk, and family circumstances all playing a role in determining the most effective approach. Knowing this, it’s best to view basis as one part of a broader estate planning discussion. Individuals with significant unrealized gains should evaluate which assets to spend during retirement, which to gift, and which to leave to beneficiaries—thoughtful coordination of investment, tax, and estate planning helping to maximize the estate’s after-tax value for heirs.
The bottom line
While it’s easy to focus primarily on the asset’s value when considering an inheritance, its tax basis can also have a major impact on how much of that value ultimately reaches the beneficiary. A step-up in cost basis can eliminate years—or even decades—of unrealized appreciation from an heir’s future capital gains calculation, but the rules can differ based on the type of asset, how it’s owned, whether it was gifted or inherited, and if trusts or joint ownership are involved. For those with highly appreciated investments, real estate, or business interests, a cost basis becomes more than just a recordkeeping detail as a key factor when choosing which assets to spend, gift, sell, or leave to heirs. Since basis rules intersect with income taxes, estate taxes, gifting strategies, trusts, and state property laws, it’s generally best to evaluate significant transfers within a broader estate planning context.
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Reviewed for accuracy
Paul Muller, AEP®, CFP®
Founder and Relationship Manager at Vision Retirement, with 30+ years in the financial industry.
Read full bio →FAQs
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When you inherit a home, its cost basis is typically adjusted to match its fair market value on the date of the previous owner's death (per tax regulations): known as a step-up in basis. If your mother bought a home for $100,000 many years ago and it’s valued at $400,000 at her death, for example, your new basis would be $400,000. Should you sell the home for $405,000 soon after inheriting it, your taxable gain would only be $5,000 instead of a much larger gain calculated from the original $100,000 basis. Determining the step-up in basis is often more complex, however, if the home is jointly owned, significant improvements have been made, the property is held in a trust, or an alternate valuation date is used.
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Traditional IRAs don’t receive a step-up in basis at death, meaning income tax on tax-deferred funds inside the account isn’t eliminated for beneficiaries—who must instead follow inherited retirement account rules. Distribution timing and taxation depend on a number of factors such as the type of account, beneficiary’s relationship to the original owner, and other circumstances. Distributions are often required within a specific period of time, any taxable withdrawals typically included in the beneficiary’s ordinary income. This distinction shows why asset location is important in estate planning; a $500,000 taxable brokerage account holding highly appreciated investments and a $500,000 traditional IRA may appear equal in value, for example, but in fact have very different after-tax consequences for heirs.
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The required documentation to do this depends on the type of property. Brokerage records are typically sufficient to establish value for publicly traded investments, but real estate, businesses, collectibles, and other unique assets often require a professional valuation or appraisal to determine their worth. Beneficiaries should retain estate records, appraisals, account statements, and any basis information provided by the executor even if they don’t plan to sell an inherited asset immediately; they may need it years later to accurately calculate the gain or loss upon eventually selling. Reconstructing a property's value decades after someone passes away is much more challenging than documenting its value during the estate-administration process.
Disclosures:
This document is a summary only and is not intended to provide specific advice or recommendations for any individual or business.
