IRS Form 8308: Section 751 Hot Assets and Filing Penalties

IRS Form 8308 is the report a partnership files when a partner sells or exchanges an interest and the partnership holds “Section 751 property” — unrealized receivables or inventory items whose built-in gain must be taxed as ordinary income rather than as capital gain. The partnership prepares a separate Form 8308 for each qualifying transaction during the year and attaches it to that year’s Form 1065.¹

When Form 8308 Is Required

Two conditions have to line up. A partner transfers a partnership interest in exchange for money or property, and some portion of what the partner receives is attributable to the partnership’s unrealized receivables or inventory items.² The form exists so the IRS can see that the ordinary-income slice of the seller’s gain was taxed as ordinary income rather than rolled into a lower-rate capital gain.

A pure gift of a partnership interest does not trigger the filing. Neither does a bequest. Without consideration flowing back to the transferring partner, there is no Section 751(a) exchange to report.¹

The partnership also needs actual notice of the transaction before the obligation attaches. That notice usually comes from the selling partner, though the partnership is treated as having notice if it otherwise knows about the transfer while holding Section 751 property.

What Section 751 Hot Assets Are

Section 751 property splits into two categories: unrealized receivables and inventory items. Both definitions are broader than their everyday accounting meaning.

Unrealized Receivables

An unrealized receivable is, at its simplest, a right to payment for goods or services the partnership has not yet reported as income under its accounting method. For a cash-basis partnership, that covers outstanding accounts receivable. The statutory definition reaches further, sweeping in the built-in ordinary income that would surface if the partnership sold certain assets at fair market value, including depreciation recapture on equipment and real property, plus gain on mining property, oil and gas properties, farmland, franchises, and trademarks.³ Certain market discount bonds and short-term obligations are counted too, to the extent a sale would produce ordinary income.

Inventory Items

Inventory items include stock in trade, property held for sale to customers, and any other property that would produce ordinary income if the partnership sold it directly. A frequent misreading: some practitioners assume the inventory has to be “substantially appreciated” (worth more than 120% of adjusted basis) before Form 8308 comes into play. That test applies to certain partnership distributions. It does not apply to sales of a partnership interest. Any amount of inventory triggers the filing.³

What the Selling Partner Must Do First

The selling partner has to tell the partnership the sale happened. Federal regulations require written notice within 30 days of the exchange, or by January 15 of the following calendar year, whichever comes first.⁴ The notice must include the names and addresses of both buyer and seller, their taxpayer identification numbers (the buyer’s TIN if known), and the date of the exchange.

Skipping this step carries a $50 penalty per failure, capped at $100,000 per calendar year.⁵ The notification is waived if the transaction is already being reported on a broker’s return under Section 6045.

What Goes on the Form

Form 8308 collects identifying data for three parties: the partnership, the transferor, and the transferee. Each needs a name, address, and taxpayer identification number. The form also asks for the exact date of the sale or exchange and whether the partner transferred the entire interest or only part.

If the record holder of the interest is a nominee, agent, or custodian holding for someone else, report the beneficial owner rather than the record holder. When the beneficial owner is unknown, check the corresponding box and report the record holder instead.¹ If either party is a disregarded entity, list the first regarded owner as the beneficial owner.

Part IV is where the computation sits. The partnership reports the transferor’s share of gain or loss in three categories: ordinary gain or loss from Section 751 hot assets, collectibles gain under Section 1(h)(5), and unrecaptured Section 1250 gain under Section 1(h)(6).⁶ The partnership arrives at those numbers by running a hypothetical sale of all partnership property at fair market value immediately before the transfer and allocating the departing partner’s share. The same amounts flow onto the partner’s Schedule K-1.

When and How to File

Form 8308 rides along with the partnership’s annual Form 1065. For a calendar-year partnership, that means March 15, with a six-month extension available to September 15.⁷ For any other fiscal year, the deadline is the 15th day of the third month after the tax year ends.

Electronic filers submit Form 8308 as an electronic attachment. Paper filers prepare a separate physical Form 8308 for each Section 751(a) exchange and staple it to the 1065.

Discovering the exchange after the 1065 has already gone in complicates things. If the window for a superseding return is still open (that is, before the extended due date), the partnership can file one. Once that window closes, the correction path splits by partnership type.¹

A BBA partnership (one subject to the centralized audit regime) must file an administrative adjustment request with Form 8308 attached. An amended Form 1065 is not an option.
A non-BBA partnership files an amended Form 1065 with Form 8308 attached within 30 days of receiving notice of the exchange, and issues corrected Schedules K-1 to the affected partners.

Filing an amended 1065 when an AAR was required is a common misstep. The IRS may treat the correction as if it had never been made.

Copies to the Partners

The partnership also has to furnish a copy of the completed Form 8308, or a statement containing the same information, to both the selling partner and the buying partner. The deadline is the later of January 31 of the year following the exchange, or 30 days after the partnership received notice of the exchange.¹

Part IV has its own timing. The IRS recognized that computing the gain and loss figures often can’t be finished by January 31, and partnerships are no longer required to furnish Part IV information to partners by that date. Parts I through III go out by January 31, and the complete form, including Part IV, is due to the partners by the due date of Form 1065 (with extensions).¹ The selling partner uses the Part IV figures to split the sale between ordinary income and capital gain on their individual return.

Penalties

Non-compliance penalties come from more than one direction, and the amounts depend on who missed what and how quickly it got fixed.

Failing to File With the IRS

A partnership that fails to file a correct Form 8308 is subject to Section 6721 penalties. For returns due in 2026, the baseline is $340 per return, with an annual cap of $4,098,500. Partnerships averaging $5 million or less in gross receipts get a lower cap of $1,366,000.⁸ Early correction reduces the amount:

Corrected within 30 days: $60 per return, up to $683,000 ($239,000 for small partnerships).
Corrected after 30 days but by August 1: $130 per return, up to $2,049,000 ($683,000 for small partnerships).

Intentional disregard is much more expensive. For Form 8308 specifically, the penalty becomes the greater of $680 or 5% of the total amounts that should have been reported, with no annual cap.⁸

Failing to Furnish Statements to Partners

Section 6722 governs the partner-copy requirement. The structure mirrors Section 6721: $340 per statement for returns due in 2026, the same tiered reductions for early correction, and the same annual caps.⁹ Intentional disregard carries a $680 minimum per statement with no annual limit.

Selling Partner’s Failure to Notify

The $50-per-failure, $100,000-per-year cap on the transferor side is smaller in absolute terms, but the practical damage is larger. If the partnership never learns about the sale, no Form 8308 gets filed, no statements go out to the partners, and the selling partner is likely to misreport their own income. A single missed notice can pull penalties in on more than one party.

1
Internal Revenue Service. Instructions for Form 8308 – Report of a Sale or Exchange of Certain Partnership Interests
2
Internal Revenue Service. About Form 8308, Report of a Sale or Exchange of Certain Partnership Interests
3
Office of the Law Revision Counsel. 26 US Code 751 – Unrealized Receivables and Inventory Items
4
eCFR. 26 CFR 1.6050K-1 – Returns Relating to Sales or Exchanges of Certain Partnership Interests
5
Office of the Law Revision Counsel. 26 USC 6723 – Failure to Comply With Other Information Reporting Requirements
6
Internal Revenue Service. Instructions for Form 8308 (11/2025)
7
Internal Revenue Service. Publication 509 – Tax Calendars
8
Internal Revenue Service. Revenue Procedure 2024-40
9
Internal Revenue Service. 20.1.7 Information Return Penalties