On Form 1099-S, a settlement agent reports the closing date, gross proceeds, the property’s address or legal description, whether the seller received property or services as consideration, whether the seller is a foreign person, and the buyer’s share of any real estate tax paid in advance. Alongside those six boxes, the form carries the seller’s full legal name, mailing address, and taxpayer identification number, plus the filer’s own identifying information. Each field has its own rules, and the settlement agent, not the buyer or seller, is personally on the hook for getting them right.
Who Files the Form
Federal law fixes the order. The person responsible for closing the transaction files first; if no one holds that role, responsibility passes to the mortgage lender, then the seller’s broker, then the buyer’s broker, and finally anyone the IRS designates by regulation.1Office of the Law Revision Counsel. 26 USC 6045 – Returns of Brokers In almost every closing, that means the title company, closing attorney, or escrow officer. You can’t push the obligation onto the parties by agreement, and you can’t skip it because the deal was small or informal.
Box 1: Date of Closing
Enter the closing date shown on the Closing Disclosure. If no Closing Disclosure was used, the closing date is the earlier of the date title transfers or the date the economic benefits and burdens of ownership shift to the buyer.2Internal Revenue Service. Instructions for Form 1099-S (04/2025) That distinction matters when possession is delayed or the closing is phased.
Box 2: Gross Proceeds
Gross proceeds is the total cash and value received by or on behalf of the seller. Include the stated principal of any promissory note and the balance of any mortgage paid off at closing. If the buyer assumes the seller’s loan or takes the property subject to a liability, that liability counts as cash and gets added in.2Internal Revenue Service. Instructions for Form 1099-S (04/2025)
Do not subtract selling expenses. Commissions, attorney fees, inspection costs, title insurance, recording fees, and prorated property taxes paid by the seller at closing don’t reduce Box 2. Report the total contract price before any deductions. The seller adjusts for costs on their own return when they calculate gain or loss. An agent who nets out expenses creates a mismatch between what the IRS sees and what the seller reports.
For contingent payment transactions, report the maximum determinable proceeds. For a like-kind exchange with no reportable gross proceeds, enter zero in Box 2 and check Box 4.2Internal Revenue Service. Instructions for Form 1099-S (04/2025)
Box 3: Address or Legal Description
Enter the full street address with city, state, and ZIP code. If the address alone doesn’t identify the property, add a legal description such as section, lot, and block. Unimproved land without a street address is identified by its legal description. For timber royalty payments, enter “Timber royalties” instead of an address.2Internal Revenue Service. Instructions for Form 1099-S (04/2025)
Box 4: Property or Services as Consideration
Check Box 4 if the seller received or will receive property (other than cash or amounts treated as cash) or services as part of the deal. The typical case is a property swap or a like-kind exchange. If you’re reporting a like-kind exchange with zero reportable gross proceeds, enter $0 in Box 2 and check Box 4.2Internal Revenue Service. Instructions for Form 1099-S (04/2025)
Box 5: Foreign Person Indicator
Check Box 5 if the seller is a nonresident alien, foreign partnership, foreign estate, or foreign trust. That flag signals possible withholding obligations under FIRPTA. When a U.S. real property interest is acquired from a foreign person, the buyer usually has a separate obligation to withhold a percentage of the sale price and report it on Form 8288.2Internal Revenue Service. Instructions for Form 1099-S (04/2025)
Box 6: Buyer’s Share of Real Estate Tax
For residential transactions, enter the amount of real estate tax paid in advance that’s allocable to the buyer. You don’t report amounts for taxes paid in arrears. The Closing Disclosure usually breaks the figure out clearly, and you can rely on it.2Internal Revenue Service. Instructions for Form 1099-S (04/2025)
Seller Name, Address, and TIN
The form also requires the seller’s full legal name, current mailing address, and Taxpayer Identification Number, which is a Social Security Number for individuals or an EIN for entities. Collect this on Form W-9, which is designed for exactly this purpose.3Internal Revenue Service. About Form W-9, Request for Taxpayer Identification Number and Certification
Get the W-9 early. Chasing a seller for their TIN after closing is a common headache, and filing without a correct TIN triggers penalties. Backup withholding, which normally applies when a payee fails to furnish a TIN, does not apply to real estate transactions.4Internal Revenue Service. Publication 15 (2026), (Circular E), Employer’s Tax Guide So you can’t fix a missing TIN by withholding from proceeds; you can only fix it by getting the number.
When There Is More Than One Seller
File a separate 1099-S for each seller. Before or at closing, request an allocation of gross proceeds among them. If you receive a complete allocation adding to 100%, report each seller’s share on that seller’s form. You may rely on any single seller’s uncontested allocation.5Internal Revenue Service. Instructions for Form 1099-S (Rev. April 2025)
With no allocation, or with conflicting ones, report the total unallocated gross proceeds on each seller’s form. Each seller’s 1099-S then shows the full sale price. That looks alarming, but it’s the correct procedure. The sellers sort out their respective shares on their own returns.
Spouses are treated as one transferor if they were married at closing and held the property as joint tenants, tenants by the entirety, tenants in common, or community property. One Form 1099-S showing either spouse is enough, and no allocation is needed unless a non-spouse seller is also involved.5Internal Revenue Service. Instructions for Form 1099-S (Rev. April 2025)
When You Don’t File at All
The most common exception is the sale of a principal residence, but the exemption is narrower than many closers assume. You’re excused from filing only if the sale price is $250,000 or less ($500,000 if the seller certifies they’re married) and you receive a written certification from the seller meeting specific requirements.2Internal Revenue Service. Instructions for Form 1099-S (04/2025)
The certification, signed under penalties of perjury, must state that the property is the seller’s principal residence within the meaning of Section 121, that the full amount of gain is excludable under Section 121 (up to $250,000 for single filers, $500,000 for joint filers),6Office of the Law Revision Counsel. 26 USC 121 – Exclusion of Gain From Sale of Principal Residence and that there has been no period of nonqualified use after December 31, 2008.
You can collect the certification anytime on or before January 31 of the year after the sale, and you may rely on it unless you have actual knowledge that something in it is incorrect. Without a certification, you file the 1099-S regardless of price or eligibility. For joint sellers who aren’t spouses, each one has to certify separately. Any seller who doesn’t certify gets a 1099-S.2Internal Revenue Service. Instructions for Form 1099-S (04/2025)
Other transactions are outside the filing requirement altogether. Transfers between spouses under Section 1041 and other gifts and bequests, foreclosures and deeds in lieu, and sales where total consideration is determinably less than $600 are all excluded. Sales by corporations and governmental units are generally exempt, as are sales by exempt volume transferors.7eCFR. 26 CFR 1.6045-4 – Information Reporting on Real Estate Transactions The $600 de minimis rule catches people off guard: any transaction at or above that figure requires a 1099-S even if it feels minor, like selling a strip of land to a neighbor.
Filing Deadlines
For 2025 transactions filed in early 2026, the seller’s copy of the form must be furnished by February 15, 2026 (you can provide it any time after closing). Paper returns are due to the IRS by February 28, 2026, and electronic returns by March 31, 2026.8Internal Revenue Service. Publication 1099 (2026), General Instructions for Certain Information Returns
If you file 10 or more information returns of any type during the year, electronic filing is mandatory.9Internal Revenue Service. E-File Information Returns The threshold is cumulative across all information return types, so any active title company or closing attorney passes it easily. Form 8809, filed through the IRS FIRE system by the original due date, grants an automatic 30-day extension.10Internal Revenue Service. About Form 8809, Application for Extension of Time to File Information Returns
Penalties for Wrong or Late Reports
Penalties fall on the reporting person, not the seller, and they scale with delay. For returns due in 2026:11Internal Revenue Service. Information Return Penalties
- Up to 30 days late: $60 per return
- 31 days late through August 1: $130 per return
- After August 1 or not filed: $340 per return
- Intentional disregard: $680 per return
The same tiers apply to incorrect information, including a missing or wrong TIN. The IRS can waive or reduce a penalty for reasonable cause, but a bare explanation won’t clear that bar without documentation of the steps you took to comply.11Internal Revenue Service. Information Return Penalties
Keep copies of filed information returns, or the ability to reconstruct them, for at least three years from the due date. If you relied on a principal residence certification to skip filing, hold that certification for four years after the year of sale.2Internal Revenue Service. Instructions for Form 1099-S (04/2025)