When someone dies, the assets they leave behind generally get a new tax basis equal to fair market value on the date of death, and that reset can either wipe out decades of built-up capital gain or lock in a loss that can never be claimed. This is what tax law calls a step-up or step-down in basis, and it’s the reason inheriting an appreciated asset and receiving the same asset as a lifetime gift produce very different tax bills when the recipient eventually sells. Gifts don’t get the reset. They carry the donor’s original basis forward, along with all the gain (or loss) that came with it.
What Basis Is and Why It Controls Your Tax Bill
Your basis in an asset is the number you subtract from the sale price to figure out your capital gain or loss. It starts with what was paid for the property, including acquisition costs like closing fees and transfer taxes.1Office of the Law Revision Counsel. 26 USC 1012 – Basis of Property-Cost Permanent improvements push basis up. Depreciation deductions on rental or business property push it down, and the reduction happens whether or not the deduction was actually claimed on a return.
The higher your basis at the time of sale, the smaller your taxable gain. That is the entire mechanism behind why the step-up rule matters so much to heirs.
How the Step-Up Works at Death
Property acquired from someone who has died takes a basis equal to its fair market value on the date of death.2Office of the Law Revision Counsel. 26 USC 1014 – Basis of Property Acquired From a Decedent Every dollar of appreciation that accumulated during the original owner’s lifetime disappears for income tax purposes. If your parent bought a stock for $5,000 decades ago and it’s worth $80,000 when they die, your basis is $80,000. Sell it the next day at that price and you owe no capital gains tax.
The step-up doesn’t depend on the size of the estate. A modestly appreciated family home gets the same treatment as a large stock portfolio. It also erases accumulated depreciation on rental property: an heir starts fresh at current market value, without the recapture obligation that would have followed the original owner.
When the Reset Works Against You: Step-Down
The same rule cuts the other way when an asset has lost value. If fair market value at death is below the deceased’s original cost, the heir’s basis drops to that lower figure. The paper loss that existed during the owner’s lifetime is gone. Nobody ever deducts it.
Say a relative paid $300,000 for a vacation property and it’s worth $200,000 when they die. Your basis is $200,000. Sell for $210,000 and you have a $10,000 taxable gain, even though the property is down $90,000 from what was originally paid for it. For families holding assets that have declined substantially, the tax planning tension is real: selling before death preserves a deductible loss, while holding through death eliminates it.
Inherited Assets That Don’t Get a Basis Adjustment
Not every inheritance qualifies. The main exception is “income in respect of a decedent” — amounts the deceased had earned or become entitled to but hadn’t yet paid tax on.3Office of the Law Revision Counsel. 26 US Code 691 – Recipients of Income in Respect of Decedents These items keep the tax character they would have had in the decedent’s hands.
Traditional IRAs and 401(k)s are the biggest category. They were funded with pre-tax dollars, and the built-in income tax obligation follows the account to the beneficiary. Distributions are taxed as ordinary income at the heir’s rate. The same treatment applies to inherited annuities, unpaid wages owed to the deceased, and installment sale obligations. If estate tax was paid on any of these items, the beneficiary can claim a deduction for the portion of estate tax attributable to that income, which softens but doesn’t eliminate the double hit.
Joint Ownership Changes How Much Gets Stepped Up
How the property is titled, and where the owners live, determines how much of a jointly held asset gets the adjustment.
Joint Tenancy and Tenancy by the Entirety
For property held as joint tenants with right of survivorship, only the deceased owner’s share resets. The surviving co-owner keeps their original basis on their half. Two siblings owning a rental 50/50: when one dies, the survivor’s half stays at cost and the deceased sibling’s half moves to fair market value.
Married couples in most states holding property as tenants by the entirety follow the same split. A home bought for $100,000 that’s worth $400,000 when one spouse dies gives the survivor a blended basis of $250,000: the original $50,000 on their half, plus a stepped-up $200,000 on the deceased spouse’s half.2Office of the Law Revision Counsel. 26 USC 1014 – Basis of Property Acquired From a Decedent
Community Property States
Nine states use community property rules, and the difference for surviving spouses is significant. Both halves of community property receive a basis adjustment when one spouse dies, not just the deceased spouse’s half.4Office of the Law Revision Counsel. 26 USC 1014 – Basis of Property Acquired From a Decedent – Section 1014(b)(6) Using the same home example, a surviving spouse in a community property state gets a full $400,000 basis rather than $250,000. That extra $150,000 in basis can eliminate a substantial capital gains bill on sale. The full double step-up applies as long as at least half the community property interest was includible in the deceased spouse’s gross estate, which is normally automatic.
Lifetime Gifts Follow a Completely Different Rule
Property received as a gift during the donor’s lifetime doesn’t get a reset. It takes the donor’s basis, unchanged.5Office of the Law Revision Counsel. 26 USC 1015 – Basis of Property Acquired by Gifts and Transfers in Trust If a grandparent bought stock for $10,000 and gifts it to you when it’s worth $50,000, your basis is $10,000. Sell at $50,000 and you have a $40,000 taxable gain. The donor’s holding period comes along with the basis, so you’re treated as having held the asset for as long as they did.6Office of the Law Revision Counsel. 26 USC 1223 – Holding Period of Property
This is why the choice between gifting an appreciated asset and leaving it through an estate is a real tax decision, not a formality. The same asset produces a very different bill for the recipient depending on which path it takes.
The Dual Basis Rule for Gifts of Depreciated Property
A quirky rule kicks in when someone gifts you property that has lost value. If the donor’s basis is higher than the fair market value at the time of the gift, you end up with two basis figures: one for calculating a gain, one for calculating a loss.5Office of the Law Revision Counsel. 26 USC 1015 – Basis of Property Acquired by Gifts and Transfers in Trust
Your gain basis is the donor’s original basis. Your loss basis is the fair market value at the date of the gift. If you sell at a price between the two, you recognize neither gain nor loss. A parent who paid $50,000 for stock and gifts it to you when it’s worth $30,000 leaves you with a $50,000 gain basis and a $30,000 loss basis. A sale at $35,000 produces nothing taxable at all.
Transfers Between Spouses
Property transferred between spouses, or between former spouses as part of a divorce, is governed by a separate statute. No gain or loss is recognized on the transfer, and the receiving spouse takes the transferor’s adjusted basis, whether the property has appreciated or depreciated.7Office of the Law Revision Counsel. 26 USC 1041 – Transfers of Property Between Spouses or Incident to Divorce The dual basis rule doesn’t apply to these transfers. A rental property with a $200,000 adjusted basis transferred in a divorce carries that same $200,000 basis, along with any built-in gain, to the receiving spouse.
The Alternate Valuation Date
An executor can elect to value the estate as of six months after the date of death instead of the date itself.8Office of the Law Revision Counsel. 26 USC 2032 – Alternate Valuation Assets sold or distributed before the six-month point are valued on the date of that disposition.
Two conditions have to be met: the election must reduce the total gross estate value, and it must reduce the estate tax owed. An estate that doesn’t owe any estate tax can’t make the election at all. When the executor does elect it, every heir’s basis shifts to the alternate value. It’s all-or-nothing across the estate, and once made, the choice can’t be reversed.9Internal Revenue Service. Instructions for Form 706
Reporting Basis to the IRS and to Heirs
Most estates never file a federal estate tax return. For 2026, the filing threshold is $15,000,000 in gross estate value.10Internal Revenue Service. Estate Tax Beneficiaries of estates below that number still get the stepped-up basis; there’s simply no formal reporting to worry about.
For estates that do file, the executor submits Form 8971 to the IRS and provides a Schedule A to each beneficiary showing the reported value of the assets they received.11Office of the Law Revision Counsel. 26 USC 6035 – Basis Information to Persons Acquiring Property From Decedent These are due within 30 days of filing the estate tax return or its due date (including extensions), whichever is earlier.
A consistent basis rule then binds the beneficiary. You cannot claim a basis higher than the value reported on the estate return.12Office of the Law Revision Counsel. 26 USC 1014 – Basis of Property Acquired From a Decedent – Section 1014(f) Reporting a mismatched figure exposes you to a 20% accuracy-related penalty on any resulting underpayment.13Office of the Law Revision Counsel. 26 USC 6662 – Imposition of Accuracy-Related Penalty on Underpayments If you inherit from a large estate, ask the executor for the Schedule A before you sell anything. That document is what your gain or loss calculation has to match.