IRS eases partnership reporting deadline, KPMG clients gain more time

Partnership tax teams that spent years racing to assemble Section 751 data by Jan. 31 finally got a cleaner timetable. The IRS issued final regulations, Treasury Decision 10048, on May 20, 2026, removing the old early furnishing deadline for the most technical part of partnership-interest sale reporting and tying the remaining due date to the partnership’s Schedule K-1 cycle.

The rule change matters inside firms like KPMG because it cuts out a recurring February fire drill. Under the final rules, partnerships no longer have to furnish Part IV of Form 8308 by Jan. 31. KPMG said only Parts I, II and III now need to be furnished by the section 6050K due date, while Part IV is filed as an attachment to Form 1065. The regulations are effective May 20, 2026, and apply to tax years beginning on or after that date.

For practitioners, the shift does not erase the underlying complexity. Section 751(a) still governs partnership interests tied to unrealized receivables or inventory items, and partnerships still must file a return under section 6050K when there is a Section 751(a) exchange. But the timing change gives deal teams, tax teams and accounting teams more breathing room to gather data before finalizing seller communications. That is a meaningful operational fix in private equity work and other high-volume pass-through engagements, where legal documents, closing statements and year-end allocation data rarely arrive in a neat sequence.

The new framework also reflects how the IRS has been unwinding the strain created by the October 2023 rewrite of Form 8308, which added Part IV reporting for Section 751 gain and loss, collectibles gain and unrecaptured Section 1250 gain. Temporary penalty relief came first in IRS Notice 2024-19 for certain 2023 exchanges, then was extended in Notice 2025-02 for certain 2024 exchanges. The Treasury Department and IRS proposed making that relief permanent on Aug. 18, 2025, and the final regulations adopted the proposal without change.

For KPMG staff, the immediate action is to redesign the process, not just celebrate the extra time. Engagement letters, client calendars and workplans will need to be updated so the later deadline is used to improve accuracy, not to defer work. Transaction review checklists should also flag when a deal may involve Section 751 property, because the regulations still allow a partnership in doubt to file Form 8308 to reduce penalty risk under section 6721.

The result is a more workable reporting cadence for a busy tax practice. The IRS has turned what had been a temporary safe harbor into a permanent reporting structure that fits the normal partnership compliance calendar, and that should mean fewer rushed calculations, cleaner filings and less friction when the next sale closes.