IRS Grants Extension for Portability Election Under § 2010(c)(5)(A)

IRS Grants 120-Day Extension for Portability Election: What Estates Need to Know

The IRS granted a 120-day extension to an estate seeking to file a portability election under § 2010(c)(5)(A), allowing the surviving spouse to claim the decedent’s unused exclusion amount. The estate, which was not required to file Form 706 under § 6018(a), received approval to make the election by filing a complete Form 706 within 120 days of the IRS’s letter. The decision underscores that estates not obligated to file under § 6018(a) may still qualify for extensions under § 301.9100-3, provided they demonstrate reasonable cause and good faith.

The Taxpayer's Request: Why the Estate Needed an Extension

The estate sought an extension to file a portability election under § 2010(c)(5)(A), allowing the surviving spouse to claim the deceased spouse’s unused estate tax exemption (DSUE). The decedent died in 2026, leaving a surviving spouse. The estate’s representative confirmed it was not required to file Form 706 under § 6018(a), as the gross estate did not exceed the applicable exclusion amount ($13.61 million in 2024).

Despite this exemption, the estate later discovered that a portability election was necessary to transfer the DSUE amount to the surviving spouse. The DSUE represents the unused portion of the decedent’s exemption; without an election, it is permanently lost. The estate failed to timely file Form 706 to make the election, prompting a request for a 120-day extension under § 301.9100-3. The estate’s representative argued the delay was unintentional to preserve the surviving spouse’s ability to utilize the DSUE in future planning.

IRS Rationale: Why the Extension Was Granted

The IRS granted the estate’s request for a 120-day extension under § 301.9100-3, which allows discretionary relief for missed regulatory elections if the taxpayer demonstrates reasonable cause and good faith. The estate met the three core requirements: no willful neglect, diligent compliance efforts, and no prejudice to the government’s audit rights.

The IRS concluded the delay resulted from circumstances beyond the estate’s control and that granting relief would not harm the government’s interests. The estate must file a complete Form 706 within 120 days of the ruling letter, including a copy of the letter, to elect portability. However, if the estate is later found subject to § 6018(a) filing requirements, the extension is void.

Key Takeaways: Implications for Estates and Practitioners

The IRS’s grant of a 120-day extension under § 301.9100-3 highlights critical implications for estates and practitioners. Even estates not required to file Form 706 under § 6018(a) must file to elect portability or risk permanent loss of the DSUE amount. The IRS’s caveat that the extension is void if the estate later exceeds the § 6018(a) threshold reinforces the binary nature of filing obligations.

Relief under § 301.9100-3 requires demonstrating reasonable action and good faith. Practitioners should document client communications and filing attempts to support future requests. While PLRs like this one are non-precedential, they provide instructive guidance on IRS expectations for compliance.

For estates, the takeaway is clear: proactive filing is essential. Estates should file Form 706 within the 9-month deadline (or request a 6-month extension under § 6081) to elect portability. For estates missing the deadline, Rev. Proc. 2022-32 offers a streamlined pathway for estates not subject to § 6018(a), allowing a late election within 5 years without a PLR. Estates above the § 6018(a) threshold must pursue a PLR under § 301.9100-3 with detailed records of good faith efforts.

Non-Precedential but Instructive: What This PLR Means for Future Cases

This Private Letter Ruling (PLR) offers no binding precedent—its holding is explicitly confined to the taxpayer under § 6110(k)(3), which states that "this ruling is directed only to the taxpayer requesting it" and "may not be used or cited as precedent." The IRS’s disclaimer is categorical: the relief granted here does not extend beyond the specific facts presented, and future estates cannot rely on this ruling as legal authority. Yet while the IRS’s extension in this case is non-precedential, it serves as a critical instructive example of how the agency applies § 301.9100-3—the regulation governing extensions for regulatory elections—when estates demonstrate good faith and reasonable action despite missing the portability filing deadline.

The broader lesson for estates is clear: timely portability elections are not optional, even when not statutorily required. The DSUE is a time-sensitive asset, and its preservation hinges on filing Form 706 within the 9-month window (or securing a 6-month extension). The IRS’s willingness to grant relief in this PLR underscores that while extensions are rare, they are not impossible—but they demand meticulous documentation of efforts to comply. Executors who fail to file on time must show they acted prudently, sought professional guidance, and took concrete steps toward compliance, as the IRS reserves the right to deny relief if prejudice to the government is demonstrated.

For practitioners, this PLR reinforces the need for proactive estate administration, integrating portability checks at every stage—from initial asset valuation to final return preparation. The IRS’s extension in this case is a lifeline, but it is not a substitute for compliance. The safest strategy remains filing on time, every time. As the IRS continues to refine its approach to portability under evolving guidance like Rev. Proc. 2022-32, practitioners should stay vigilant, monitor future rulings, and counsel clients on the risks of delay—because while this PLR may not set precedent, its reasoning could shape the IRS’s future determinations.