Getting a Form 1099-S after selling inherited property doesn’t mean you owe tax on the full amount printed on it. The form reports gross sale proceeds to the IRS, but your actual tax bill is based on the gain, which is the sale price minus your stepped-up cost basis and selling costs. For many heirs who sell shortly after inheriting, taxes on a 1099-S inherited property sale come out to little or nothing, because the sale price and the stepped-up basis are close.
The catch is that the IRS doesn’t know your basis unless you tell them. If you ignore the 1099-S on your return, expect a notice treating the entire sale price as taxable income.
Why the Number on Your 1099-S Looks So Large
Form 1099-S is filed by the closing agent (usually a title company or attorney) and sent to both you and the IRS after a real estate sale.1Internal Revenue Service. Instructions for Form 1099-S Box 2 shows the gross proceeds, which is essentially the contract sales price. It does not subtract commissions, closing costs, attorney fees, or any mortgage paid off at settlement.2Internal Revenue Service. Form 1099-S, Proceeds From Real Estate Transactions And it says nothing about your basis.
So if you inherited a home worth $400,000 and sold it for $410,000, the 1099-S shows $410,000. The IRS sees $410,000. It’s on you to demonstrate on your return that most of that isn’t taxable.
The Stepped-Up Basis Does Most of the Work
The stepped-up basis is the reason inherited property sales are usually taxed lightly. Under federal law, the cost basis of property acquired from a decedent is generally its fair market value on the date of death, not what the decedent originally paid.3Office of the Law Revision Counsel. 26 U.S.C. 1014 – Basis of Property Acquired From a Decedent If your parent bought a house in 1985 for $90,000 and it was worth $400,000 when they died, your basis is $400,000. The $310,000 of appreciation during their lifetime is never taxed.
The IRS applies the same rule: to determine whether the sale of inherited property is taxable, you start with the fair market value at the date of death.4Internal Revenue Service. Gifts and Inheritances
Establishing that fair market value is the practical step that matters most. The standard approach is a licensed appraiser valuing the property as of the date of death, looking at comparable sales, condition, and local market data. Keep the appraisal report with your tax records permanently. In an audit, a professional appraisal dated near the death is the strongest evidence you can produce for your basis. If the estate filed a Form 706, that return should already include real property appraisals.5Internal Revenue Service. Instructions for Form 706
A Bigger Step-Up for Surviving Spouses in Community Property States
Normally, when one co-owner dies, only the decedent’s half of the property gets a stepped-up basis. Community property is different: both halves receive the step-up to fair market value at the date of death, as long as at least half the value of the community property interest is includible in the decedent’s gross estate.6Internal Revenue Service. Publication 555 Community Property This full step-up applies in Arizona, California, Idaho, Louisiana, Nevada, New Mexico, Texas, Washington, and Wisconsin.
Calculating the Taxable Gain
Once you know your stepped-up basis, the math is direct: sale price, minus selling expenses, minus adjusted basis, equals taxable gain.
Selling expenses include real estate commissions, title insurance, closing costs, transfer taxes, and attorney fees related to the sale. Your adjusted basis starts with the fair market value at the date of death and goes up for capital improvements you made after inheriting (a new roof, HVAC replacement, major renovation). It goes down for any depreciation you claimed if you rented the property out.
A worked example: you inherit a home appraised at $400,000 on the date of death, spend $15,000 on a new roof, and sell for $450,000 with $30,000 in commissions and closing costs. Adjusted basis is $415,000. Net proceeds are $420,000. Taxable gain is $5,000.
What Rate Applies to the Gain
Inherited property gets a useful shortcut: any gain on the sale automatically qualifies for long-term capital gains treatment, no matter how briefly you held it. Federal law treats property acquired from a decedent as held for more than one year even if the heir sells within days.7Office of the Law Revision Counsel. 26 U.S.C. 1223 – Holding Period of Property The higher short-term rates never apply.
Long-term capital gains are taxed at 0%, 15%, or 20%, depending on your total taxable income.8Internal Revenue Service. Topic No. 409, Capital Gains and Losses For 2026, the 0% rate covers single filers with taxable income up to $49,450 and married couples filing jointly up to $98,900. The 15% rate covers income above those thresholds up to $545,500 (single) and $613,700 (joint). Above that, it’s 20%. Most heirs land in the 0% or 15% bracket, since the step-up wipes out decades of appreciation and the remaining gain tends to be modest.
Net Investment Income Tax
Higher-income sellers face an additional 3.8% net investment income tax on capital gains when modified adjusted gross income exceeds $200,000 (single), $250,000 (married filing jointly), or $125,000 (married filing separately).9Internal Revenue Service. Topic No. 559, Net Investment Income Tax The NIIT applies to the lesser of your net investment income or the amount your income exceeds the threshold. For someone already in the 20% bracket, the combined federal rate on the gain can reach 23.8%.
Depreciation Recapture If You Rented It Out
If you converted the inherited property to a rental before selling and claimed depreciation, that depreciation must be recaptured and is taxed at a rate of up to 25%. The step-up wipes out any depreciation the decedent claimed, but depreciation you claimed as the heir reduces your basis and creates recapture exposure. This surprises heirs who rent an inherited home for a few years and then sell.
If You Sold at a Loss
A sale below your stepped-up basis creates a capital loss, but whether it’s deductible depends on how the property was used. If you rented it out or held it purely as an investment, the loss is deductible. If you or family members used it as a personal residence, the loss is not deductible, because the IRS treats it as a personal-use property loss.10Internal Revenue Service. Capital Gains, Losses, and Sale of Home
When the loss is deductible, it offsets other capital gains dollar for dollar. Excess losses can offset up to $3,000 of ordinary income per year ($1,500 if married filing separately), and anything beyond that carries forward.8Internal Revenue Service. Topic No. 409, Capital Gains and Losses
If You Moved Into the Property
Heirs who actually live in the inherited home may qualify for the Section 121 exclusion, which shields up to $250,000 of gain ($500,000 for married couples filing jointly) on the sale of a principal residence.11Office of the Law Revision Counsel. 26 U.S.C. 121 – Exclusion of Gain From Sale of Principal Residence You generally need to have owned and used the property as your main home for at least two of the five years before the sale.
Surviving spouses get a specific break: if the deceased spouse owned and used the property as a principal residence, that period counts as the survivor’s for meeting the two-year test.11Office of the Law Revision Counsel. 26 U.S.C. 121 – Exclusion of Gain From Sale of Principal Residence A surviving spouse who sells within two years of the death can often combine the stepped-up basis with the Section 121 exclusion and owe nothing.
For other heirs, this exclusion is rarely available right after inheriting, since the two-year use requirement means you’d need to actually live there for a substantial stretch before selling.
How to Report the Sale so the IRS Sees Your Basis
You have to report the sale even if the stepped-up basis means no tax is owed. The IRS already has the 1099-S. Leaving it off your return will almost certainly generate an automated notice assessing tax on the full sale price.
Two forms do the reconciliation. Form 8949 is where you enter the transaction. Report it in Part II (long-term), enter “INHERITED” in column (b) for the date acquired, put the gross proceeds from the 1099-S in column (d), and put your stepped-up basis plus any improvements (minus any depreciation) in column (e). The gain or loss flows to column (h).12Internal Revenue Service. Instructions for Form 8949
The Form 8949 totals carry to Schedule D, which nets all your capital gains and losses and produces the number that lands on your Form 1040.13Internal Revenue Service. About Form 8949, Sales and Other Dispositions of Capital Assets That’s the mechanism that shows the IRS your basis and keeps them from treating the entire 1099-S amount as taxable income.
If your modified adjusted gross income exceeds the NIIT thresholds, add Form 8960 to calculate the 3.8% net investment income tax on the applicable portion of the gain.
Federal Estate Tax Is a Separate Issue
Capital gains tax on the sale and federal estate tax on the inheritance are two different obligations. The federal estate tax applies only when the decedent’s total estate exceeds the basic exclusion amount, which is $15,000,000 for 2026.14Internal Revenue Service. What’s New – Estate and Gift Tax Most estates fall well below that and owe no federal estate tax.
Some states impose their own estate or inheritance taxes with lower exemption thresholds, sometimes starting near $1 million to $2 million. Those are separate from any capital gains tax you owe on the sale. If the decedent lived in a state with an estate or inheritance tax, check with a local tax professional about those obligations before assuming they don’t apply.