The sale of an investment property is reported on Form 8949 and Schedule D of your Form 1040, with Form 4797 handling any depreciation recapture and Form 8960 picking up the 3.8% Net Investment Income Tax if you owe it. Each form feeds into the next, and the sequence matters: you calculate the gain or loss on 8949, categorize it on Schedule D, split off the recapture portion on 4797, and layer the surtax on 8960. Depending on how the deal is structured, you may also need Form 6252 (installment sales), Form 8824 (like-kind exchange), or Form 8997 (Qualified Opportunity Fund).
The Core Forms and What Each One Does
Form 8949 is where the arithmetic happens. You enter a description of the property, the acquisition date, the sale date, the gross proceeds from your Form 1099-S, and your adjusted cost basis. The difference is your gain or loss. Because a 1099-S doesn’t report basis to the IRS the way a brokerage 1099-B does, you’ll typically check Box F for long-term transactions or Box C for short-term ones.1Internal Revenue Service. Instructions for Form 8949 (2025) Most investment property sales land in Part II (long-term), because the property was held more than a year.
The totals from Form 8949 transfer to Schedule D, which combines every capital gain and loss for the year into one net figure. Short-term and long-term results stay in separate columns because they’re taxed at different rates.2Internal Revenue Service. About Schedule D (Form 1040), Capital Gains and Losses Property held one year or less is taxed at ordinary income rates. Property held longer than a year qualifies for the 0%, 15%, or 20% long-term capital gains rates.3Internal Revenue Service. Topic No. 409, Capital Gains and Losses
If the sale produced a net loss, Schedule D lets you deduct up to $3,000 against ordinary income ($1,500 if married filing separately), with anything unused carried forward indefinitely.4Office of the Law Revision Counsel. 26 U.S. Code 1211 – Limitation on Capital Losses3Internal Revenue Service. Topic No. 409, Capital Gains and Losses Track the carryforward using the worksheet in the Schedule D instructions.
Form 4797 comes into play if you took depreciation on the property. That piece is covered further down.
Form 8960 applies the 3.8% Net Investment Income Tax, also covered below, for taxpayers above the income thresholds.
Building the Cost Basis You’ll Enter on Form 8949
You can’t fill in Form 8949 accurately until you know your adjusted cost basis. Basis starts with the original purchase price and moves from there.
Settlement costs from when you bought the property add to basis: recording fees, title insurance, transfer taxes, and legal fees at closing.5Internal Revenue Service. Topic No. 703, Basis of Assets Capital improvements made during ownership — a new roof, an addition, a replaced HVAC system — also raise basis. Routine repairs and maintenance do not.
Depreciation runs the other direction. Every year of depreciation you claimed on a rental or investment property reduced your basis by that amount. Here’s what catches people: the IRS reduces your basis by the depreciation you were entitled to take, even if you never actually claimed it.6Internal Revenue Service. Depreciation and Recapture 3 The statute calls this the “allowed or allowable” rule.7Office of the Law Revision Counsel. 26 U.S. Code 1250 – Gain From Dispositions of Certain Depreciable Realty Skipping depreciation deductions doesn’t shield you from recapture; it just costs you the tax benefit while leaving the tax on sale intact.
Gather the purchase settlement statement, receipts for improvements, and every prior-year return that includes depreciation schedules. Your Form 1099-S from the closing agent reports gross proceeds in Box 2 but says nothing about your basis.8Internal Revenue Service. Instructions for Form 1099-S (04/2025) Supporting the basis figure is on you.
Depreciation Recapture on Form 4797
If you depreciated the property (or could have under the allowed-or-allowable rule), part of your gain is taxed at a different rate than the rest, and that piece is reported on Form 4797, Part III.9Internal Revenue Service. Instructions for Form 4797 (2025) – Disposition of Depreciable Property Not Used in Trade or Business
The idea: depreciation lowered your taxable income during ownership, so the IRS wants some of that back on the sale. The portion of gain equal to prior depreciation is taxed at a maximum rate of 25%, separate from the rest of the capital gain.3Internal Revenue Service. Topic No. 409, Capital Gains and Losses Only the gain above the recapture amount gets long-term capital gains treatment.
For investment real estate not used in a trade or business, the overall gain is still a capital gain reported on Form 8949 and Schedule D. Form 4797, Part III is where you calculate how much of that gain gets pulled into the recapture bucket.10Internal Revenue Service. Instructions for Form 4797 When the property includes both a depreciable building and non-depreciable land, allocate the sale price between them by fair market value. The building goes through Part III; the land goes through Part I.
Form 8960 for the 3.8% Net Investment Income Tax
Higher earners owe an additional 3.8% surtax on investment income, including gains from selling investment property. The Net Investment Income Tax kicks in when your modified adjusted gross income exceeds $200,000 for single filers, $250,000 for married couples filing jointly, or $125,000 for married filing separately.11Internal Revenue Service. Topic No. 559, Net Investment Income Tax These thresholds aren’t adjusted for inflation.12Internal Revenue Service. Questions and Answers on the Net Investment Income Tax
You report the sale gain on Form 8960, Lines 5a through 5d. The form compares your total net investment income against the amount by which your income exceeds the threshold, and applies the 3.8% to the smaller number.13Internal Revenue Service. 2025 Instructions for Form 8960 A married couple with $300,000 in modified adjusted gross income and $80,000 in net investment income from a property sale owes 3.8% on $50,000, the smaller of $80,000 or the $50,000 they sit above the $250,000 threshold.
Releasing Suspended Passive Losses
If the property was a rental, you may have accumulated passive activity losses that were disallowed in prior years because your income was too high to deduct them. Those suspended losses don’t vanish. They wait for either enough passive income to absorb them, or a complete disposition of the property.
Selling your entire interest in a passive activity to an unrelated buyer in a fully taxable transaction releases all previously suspended losses and makes them fully deductible.14Internal Revenue Service. Instructions for Form 8582 If current-year income, current-year losses, and the prior-year suspended losses together produce an overall loss, you don’t need Form 8582 for that activity; you report the income and losses directly on the normal forms, and the overall loss is treated as nonpassive.
Before you file, pull your prior-year Form 8582s and identify any carryforward tied to the property you sold. A partial sale doesn’t trigger the release.
Installment Sales: Form 6252
If you finance the sale yourself and take payments over time, you report the gain on Form 6252 rather than recognizing all of it in the year of sale.15Internal Revenue Service. Publication 537 (2025), Installment Sales Each payment breaks into three parts: interest income, return of basis, and gain on the sale.
The key figure is the gross profit percentage: total expected gain divided by the contract price. Multiply each year’s payment (excluding interest) by that percentage to get the gain to report that year.16Internal Revenue Service. Form 6252, Installment Sale Income Interest gets reported separately as ordinary income.
One wrinkle worth flagging: depreciation recapture cannot be spread across the installment period. You owe the tax on the full recapture amount in the year of sale, no matter how little cash actually changed hands that year.15Internal Revenue Service. Publication 537 (2025), Installment Sales Only the gain above recapture qualifies for installment treatment.
File Form 6252 every year payments are due under the agreement, even in a year no payment arrives. The installment method cannot be used to report a loss.
Deferring the Gain: Form 8824 or Form 8997
Reinvesting the proceeds into another investment property through a like-kind exchange lets you defer part or all of the capital gains tax. Report the exchange on Form 8824 in the year of the transfer. If the exchange involved a related party, file Form 8824 for two additional years as well.17Internal Revenue Service. 2025 Instructions for Form 8824 – Like-Kind Exchanges The replacement property must be identified within 45 days and acquired within 180 days, and both properties must be held for investment or business use. If you receive cash or the replacement property costs less, the leftover amount (“boot”) is taxable in the year of the exchange.
A separate deferral works through Qualified Opportunity Funds. Reinvesting an eligible capital gain into a QOF within 180 days temporarily defers the tax, but the deferral window closes on December 31, 2026, and any deferred gain must be recognized by that date.18Internal Revenue Service. Invest in a Qualified Opportunity Fund Holding the QOF investment at least five years raises your basis in it by 10% of the deferred gain, and holding ten years or more can permanently exclude gain on the QOF investment itself. The election is made directly on Form 8949, with Form 8997 filed alongside the return.
Estimated Tax After the Sale
A sizable property sale can create a tax bill that wage withholding won’t cover, and the IRS charges penalties for underpayment. You generally need to make estimated tax payments if you expect to owe at least $1,000 after withholding and refundable credits, and your withholding won’t cover at least the lesser of 90% of your current-year tax or 100% of the prior-year tax (110% if prior-year adjusted gross income exceeded $150,000).19Internal Revenue Service. Estimated Tax
Estimated payments follow quarterly deadlines:
- Income received January 1 through March 31: payment due April 15
- Income received April 1 through May 31: payment due June 15
- Income received June 1 through August 31: payment due September 15
- Income received September 1 through December 31: payment due January 15 of the following year
If you close mid-year, you can annualize your income and bump up the estimated payment for that quarter rather than paying four equal installments, which avoids the penalty for earlier quarters when you had no gain to anticipate.19Internal Revenue Service. Estimated Tax Use Form 2210, Schedule AI to show the annualized method if the IRS questions your payment pattern.