The step-up in basis is one of the most valuable and least understood tax benefits in American estate planning. It can save heirs tens of thousands — or even hundreds of thousands — of dollars in capital gains taxes when they inherit property that has appreciated in value. Yet many families are unaware of it and inadvertently give it up through poor planning choices.
This guide explains what a step-up in basis is how it works why it matters and how to plan around it effectively.
What Is Basis?
Before understanding what a step-up in basis is you need to understand what basis means in the context of taxes.
Basis — also called cost basis or tax basis — is the value assigned to an asset for tax purposes. When you sell an asset the capital gain or loss you recognize for tax purposes is the difference between the sale price and your basis in the asset.
For example if you purchase 100 shares of stock for $10 per share your basis is $1,000. If you later sell those shares for $15 per share — a total of $1,500 — your capital gain is $500 — the difference between the $1,500 sale price and your $1,000 basis. You owe capital gains tax on that $500 gain.
The longer you hold an appreciated asset and the more it appreciates the larger the potential capital gains tax bill when it is eventually sold.
What Is a Step-Up in Basis?
When you inherit an asset the tax law gives you a very valuable gift — your basis in the inherited asset is stepped up to the fair market value of the asset on the date of the original owner’s death rather than the original owner’s original purchase price.
This stepped-up basis effectively wipes out all the capital gains that accumulated during the original owner’s lifetime. When you sell the inherited asset you only owe capital gains tax on appreciation that occurred after you inherited it — not on the appreciation that occurred during the original owner’s lifetime.
Using the stock example above — if you inherited those 100 shares when they were worth $15 per share your stepped-up basis would be $1,500. If you immediately sell them for $1,500 you owe zero capital gains tax. The $500 in gain that accumulated during the original owner’s lifetime simply disappears for tax purposes.
A Real World Example
Consider a more realistic example involving real estate — where the step-up in basis is particularly valuable.
Your parents purchased their home in 1985 for $120,000. When your mother dies in 2026 the home is worth $750,000. Your parents’ original basis was $120,000 — meaning if they had sold the home before death they would have owed capital gains tax on $630,000 in gain — minus any home sale exclusion they qualified for.
When you inherit the home your basis is stepped up to $750,000 — the fair market value on the date of your mother’s death. If you sell the home shortly after inheriting it for $750,000 you owe zero capital gains tax on the sale. The $630,000 in gain that accumulated over 41 years of ownership simply disappears.
At the long-term capital gains rate of 15 percent that would have been a tax bill of approximately $94,500 if the home had been sold before death. The step-up in basis eliminates that entire tax bill.
What Assets Get a Step-Up in Basis?
Most assets that pass through a decedent’s estate receive a step-up in basis including real estate — stocks and other securities — business interests — artwork and collectibles — and other appreciated property.
Assets that do NOT get a step-up in basis
Not all assets receive a step-up in basis. The following assets generally do not receive a stepped-up basis — IRAs and 401(k)s and other tax-deferred retirement accounts — annuities — assets held in irrevocable trusts in certain circumstances — and assets that were gifted during the owner’s lifetime rather than passing at death.
This last point is critically important for estate planning. Assets that are gifted during life carry the donor’s original basis — called a carryover basis — to the recipient. Assets that pass at death receive the stepped-up basis. This asymmetry creates a strong incentive to hold appreciated assets until death rather than gifting them during life in many circumstances.
The Step-Up in Basis and Gifting — A Critical Planning Consideration
One of the most common and costly estate planning mistakes is giving away highly appreciated assets during life rather than holding them until death.
When you gift an appreciated asset to someone during your lifetime the recipient receives your original basis — not the current fair market value. This is called a carryover basis. When the recipient later sells the asset they owe capital gains tax on all the appreciation from your original purchase price forward.
In contrast if you hold the same asset until death and leave it to the same person at your death they receive a stepped-up basis equal to the fair market value at your death — and the lifetime appreciation is never taxed.
For highly appreciated assets — particularly real estate stocks held for decades and family business interests — the difference between gifting during life and leaving at death can represent an enormous tax cost to the recipient.
When gifting makes sense despite the carryover basis
Despite the basis disadvantage there are situations where gifting appreciated assets during life makes sense — when estate tax savings from removing the asset from your taxable estate outweigh the capital gains tax cost — when the recipient is in a lower tax bracket than you and can sell the asset at a lower capital gains rate — when the asset is expected to continue appreciating significantly and removing future appreciation from your estate is the primary goal — and when Medicaid planning requires transferring assets more than five years before applying for Medicaid.
Stepped-Up Basis for Married Couples — Community Property States
Married couples in community property states receive an especially valuable version of the step-up in basis called a double step-up or full step-up.
In community property states — Arizona California Idaho Louisiana Nevada New Mexico Texas Washington and Wisconsin — assets acquired during marriage are generally considered owned equally by both spouses. When one spouse dies both halves of the community property receive a step-up in basis — not just the deceased spouse’s half.
This means that in a community property state if a married couple purchased stock for $100,000 that is now worth $500,000 and one spouse dies — the entire $500,000 receives a stepped-up basis. The surviving spouse can sell the stock for $500,000 and owe zero capital gains tax.
In a non-community property state — called a common law state — only the deceased spouse’s half of jointly held property receives a step-up. The surviving spouse’s half retains its original basis. In the same example the surviving spouse in a common law state would have a basis of $300,000 — a step-up on the deceased spouse’s $50,000 half to $250,000 plus the surviving spouse’s original $50,000 basis — and would owe capital gains tax on $200,000 in gain if the stock were sold for $500,000.
Step-Up in Basis and Irrevocable Trusts
Irrevocable trusts are a common Medicaid planning and estate planning tool — but they can affect step-up in basis treatment in important ways.
Medicaid Asset Protection Trusts
Assets transferred to a Medicaid Asset Protection Trust — MAPT — during the owner’s lifetime generally do receive a step-up in basis at death if the trust is structured correctly — specifically if the grantor retains certain interests such as the right to live in a home transferred to the trust or the right to receive income from trust assets. This is one of the valuable tax features of a properly structured MAPT.
Other irrevocable trusts
The step-up in basis treatment for other types of irrevocable trusts depends on the specific trust structure and how it is treated for tax purposes. Some irrevocable trusts cause assets to be included in the grantor’s estate for estate tax purposes — which also means those assets receive a step-up in basis. Other trusts remove assets from the estate entirely which means no step-up in basis at death. The tax treatment of trust assets should be carefully considered when drafting any irrevocable trust.
Step-Up in Basis and Retirement Accounts
IRAs 401(k)s and other tax-deferred retirement accounts do not receive a step-up in basis at death. When you inherit a traditional IRA or 401(k) you owe ordinary income tax on all withdrawals — the same as the original owner would have owed. There is no step-up in basis and the lifetime tax deferral does not convert to tax-free treatment at death.
This means that for income tax purposes retirement accounts are often the worst assets to inherit — and non-retirement appreciated assets are often the best assets to inherit because of the step-up in basis.
This asymmetry creates an important estate planning strategy — consider leaving retirement accounts to charities which pay no income tax and can withdraw the funds tax-free — and leaving appreciated non-retirement assets to individual heirs who benefit from the step-up in basis. This approach maximizes the after-tax value of the estate for both the charity and the individual heirs.
Planning Strategies That Maximize the Step-Up in Basis
Understanding the step-up in basis allows you to make smarter decisions about which assets to hold until death and which to give away during life.
Hold appreciated assets until death
For assets with large unrealized capital gains — particularly real estate and stocks held for many years — holding until death allows heirs to receive the stepped-up basis and sell without capital gains tax.
Gift low-basis assets to charity
Donating appreciated assets to charity during life eliminates capital gains tax on the appreciation and generates a charitable deduction for the full fair market value. This is generally more tax-efficient than selling the asset and donating the after-tax proceeds.
Give away high-basis assets
If you want to make gifts during life consider giving assets with a basis close to their current fair market value — so the carryover basis to the recipient is similar to the current value. The capital gains tax cost of the carryover basis is minimized when the basis is already high.
Consider Roth conversions for retirement accounts
Since retirement accounts do not receive a step-up in basis converting traditional IRA funds to a Roth IRA during life — paying income tax now — means heirs can inherit the Roth IRA and withdraw funds tax-free rather than owing ordinary income tax on inherited traditional IRA withdrawals.
Key Resources
- IRS Publication 551 — Basis of Assets — irs.gov — official IRS guidance on basis rules
- National Academy of Elder Law Attorneys — NAELA — naela.org — find a qualified elder law or estate planning attorney
- Your financial advisor or CPA — can help you identify highly appreciated assets in your estate and plan around the step-up in basis rules
The information in this article is for general informational purposes only and does not constitute legal or financial advice. Tax laws including step-up in basis rules can change. Always consult a qualified estate planning attorney and tax advisor before making decisions based on step-up in basis planning.
Last updated: July 2026