Estate tax and capital gains tax are two different bills that can both touch the same piece of real estate, and owners frequently mix them up. Estate tax is assessed on the value of everything a person owns at death, above a federal exemption that is large enough to keep most estates out of it entirely. Capital gains tax is assessed separately when property is later sold, and the two interact through the stepped-up basis rule in a way that changes the planning conversation considerably.
How Real Estate Gets Valued in an Estate
Real property included in a taxable estate is generally valued at its fair market value on the date of death, established through a qualified appraisal, not the price the deceased originally paid. An estate can, in some cases, elect an alternate valuation date six months later if the estate's overall value declined during that window, though this election applies to the entire estate, not property by property.
For rental and commercial real estate, that appraisal has to account for income, comparable sales, and any encumbrances like existing debt, which is why estates with significant real estate holdings almost always bring in a professional appraiser rather than relying on a tax assessment or a rough market estimate.
The Federal Exemption and Why Most Estates Never Owe the Tax
The federal estate tax exemption is set high enough that the large majority of estates, including many that hold substantial real estate, fall entirely below the threshold and owe no federal estate tax at all. That exemption amount is set by current legislation and is scheduled to change over time, so an estate that comfortably clears the threshold today is not guaranteed to clear a lower threshold years from now if the law shifts.
A smaller number of states layer their own estate or inheritance tax on top of the federal rules, with separate and often much lower exemption thresholds, which matters for owners with real estate concentrated in one of those states.
Where Stepped-Up Basis Changes the Real Planning Question
- An heir who inherits real estate generally receives a basis equal to its fair market value at death, erasing decades of built-in gain the original owner would have paid tax on
- This step-up applies regardless of whether the estate owes any estate tax, so even an estate well under the exemption still benefits from it
- Property gifted during life, rather than left at death, does not get this step-up and instead carries the giver's original basis forward to the recipient
- This difference is why holding appreciated real estate until death, instead of gifting it earlier, is one of the most commonly discussed strategies in estate planning
Lifetime Tools That Work Alongside Estate Planning
An owner who wants to keep real estate working and growing during their lifetime, rather than selling and paying capital gains tax outright, can use a 1031 exchange to defer the gain into a new property, then let that deferred gain wash out through the stepped-up basis if the property is still held at death. Combined with a well-structured estate plan, that sequence can mean decades of deferred capital gains tax are never actually paid by anyone, since the heirs inherit at the new fair market value rather than the original low basis.
This only works cleanly if the property is still owned at death rather than sold beforehand, so it is a long-horizon strategy tied to how an owner wants to pass real estate to the next generation, not a quick tax move.
Where This Gets More Complicated
Real estate held in certain trust structures, jointly owned across multiple family members, or encumbered by debt at death can each change how valuation, exemption, and basis rules apply. An estate with real estate spread across several states may also owe state-level estate or inheritance tax in more than one place. None of this is a substitute for coordinated advice from an estate attorney and tax advisor familiar with the specific property and family situation.
Common Questions
Is estate tax the same as inheritance tax?
No. Estate tax is assessed on the estate itself before assets are distributed, based on the total value of what the deceased owned. Inheritance tax, where it exists at the state level, is assessed on what a specific heir receives and can depend on their relationship to the deceased.
Do heirs owe estate tax on real estate they inherit?
Generally no, since estate tax is paid by the estate itself, if it is owed at all, before assets are distributed. Heirs may separately owe capital gains tax later if they sell the property for more than their stepped-up basis.
Does a 1031 exchange avoid estate tax?
No. A 1031 exchange defers capital gains tax on a sale, and has no direct effect on whether the property's value is included in a taxable estate at death. The two taxes are calculated separately.
What happens if real estate in an estate has an outstanding mortgage?
The property is generally included in the estate at its full fair market value, and the outstanding debt is deducted as a liability of the estate, which reduces the net taxable value rather than the gross value used for basis purposes.
Should an owner gift real estate now or leave it to heirs at death?
Gifted property carries the giver's original basis forward, losing the step-up available at death, while inherited property generally resets to fair market value. For appreciated real estate, leaving it to heirs at death is usually far more favorable from a capital gains standpoint, though every family's estate tax exposure and goals differ.
