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

IRS Grants 120-Day Extension for Portability Election After Untimely Filing

The IRS granted a 120-day extension under § 301.9100-3 to an estate that missed the deadline to elect portability of a deceased spouse’s unused exclusion (DSUE) under § 2010(c)(5)(A). The estate, which was not required to file Form 706 under § 6018(a), sought to preserve the DSUE amount for the surviving spouse. While the ruling is non-precedential, it underscores the IRS’s discretion to grant relief when taxpayers act reasonably and in good faith, provided no prejudice to the government occurs.

The Question: Can a Non-Required Estate File for Portability After the Deadline?

The taxpayer’s request arose from a decedent who died on an unspecified date, survived by their spouse. The estate’s representatives asserted that the decedent’s gross estate fell below the filing threshold under Section 6018(a), which requires an estate tax return (Form 706) only if the gross estate exceeds the applicable exclusion amount (currently $13.61 million in 2024, adjusted for inflation). Because the estate’s value—including any taxable gifts—did not meet this threshold, the estate was not legally obligated to file Form 706 under Section 6018(a).

However, the estate later discovered that a portability election was necessary to preserve the deceased spouse’s unused exclusion (DSUE) amount for the surviving spouse. Portability, established by the Tax Relief, Unemployment Insurance Reauthorization, and Job Creation Act of 2010, allows a surviving spouse to inherit and utilize the deceased spouse’s unused estate tax exemption. Under Section 2010(c)(5)(A), this election is made by filing a Form 706 that computes the DSUE and includes a specific election statement. The election must be filed within nine months of the decedent’s death (or within the extended period if an extension was obtained), as prescribed by Section 20.2010-2(a)(1) of the Estate Tax Regulations.

The estate had failed to file Form 706 within the statutory deadline, thereby missing the opportunity to elect portability. Upon realizing the oversight, the estate sought relief under Section 301.9100-3, which permits the IRS Commissioner to grant a reasonable extension of time to make a regulatory election if the taxpayer acted reasonably and in good faith and the government’s interests would not be prejudiced. The estate’s request hinged on whether the IRS would exercise its discretion to permit a late filing under these conditions.

The IRS's Rationale: Reasonable Action and No Prejudice to Government

The IRS evaluated the estate’s request under Section 301.9100-3, which grants the Commissioner discretion to extend regulatory election deadlines when three conditions are met: (1) the taxpayer acted reasonably and in good faith, (2) granting relief would not prejudice the government’s interests, and (3) the election’s due date is prescribed by regulation rather than statute. The IRS emphasized that this authority is discretionary, not automatic, and that relief is granted on a case-by-case basis without establishing precedent.

In this case, the estate submitted affidavits and representations explaining the failure to timely file Form 706 for the portability election under Section 2010(c)(5)(A). The IRS concluded that the estate’s actions satisfied the reasonable action and good faith standard. The estate demonstrated it had taken steps to comply with filing requirements but overlooked the portability election due to administrative oversight. The IRS further determined that granting a 120-day extension would not prejudice the government, as no tax revenue would be lost and the statute of limitations remained unaffected.

Based on these findings, the IRS granted a 120-day extension from the date of the ruling letter, permitting the estate to file a timely portability election by submitting a complete Form 706 to the Kansas City Service Center. The ruling explicitly states that the extension is void if it is later determined that the estate was required to file Form 706 under Section 6018(a)—the statutory threshold for estate tax return filing. The IRS cautioned that the grant of relief is non-precedential and does not bind future determinations, as outlined in Section 6110(k)(3). The ruling also disclaimed any opinion on the substantive DSUE amount, deferring audit review to the Director’s office.

Implications: What This Means for Other Estates and Practitioners

The IRS’s grant of a 120-day extension in this PLR underscores the critical importance of timely filing for portability elections, even when an estate is not otherwise required to file Form 706 under Section 6018(a)—the statutory threshold that mandates estate tax returns for gross estates exceeding the basic exclusion amount. The ruling demonstrates the IRS’s willingness to grant relief under § 301.9100-3 for non-required estates, but only when the taxpayer can prove reasonable action and good faith. The IRS explicitly cautioned that the extension is void if it is later determined that the estate was required to file Form 706 under Section 6018(a), as the grant of relief is non-precedential and does not bind future determinations under Section 6110(k)(3).

For practitioners, this ruling highlights three key risks when advising clients on portability elections. First, relying on this PLR as precedent is perilous—the IRS explicitly states that such rulings "may not be used or cited as precedent." Second, audit risks remain significant, as the IRS reserves the right to challenge the substantive DSUE amount during examination, deferring such determinations to the Director’s office. Third, the ruling’s conditional nature—void if the estate was actually required to file—creates uncertainty for estates that later discover they crossed the Section 6018(a) threshold, potentially retroactively invalidating the extension.

Best practices for estates seeking to preserve DSUE amounts now emerge more clearly. Executors should file Form 706 proactively, even for small estates, to avoid the need for § 301.9100-3 relief. If a late filing is unavoidable, practitioners must document every step taken in good faith, including consultations with advisors, attempts to file, and any unforeseen delays. The IRS’s emphasis on no prejudice to the government means estates must demonstrate that the delay did not result in lost revenue or statute of limitations issues. For estates that have already missed deadlines, the ruling reinforces the need to act quickly, as the IRS’s discretionary relief is not guaranteed and remains subject to future audit scrutiny.