What Is a Reverse QTIP Trust? The Election and Form 706

A reverse QTIP trust is a qualified terminable interest property trust for which the executor of the first spouse to die makes a special election under Internal Revenue Code Section 2652(a)(3), causing the IRS to treat that deceased spouse as the transferor of the trust assets for generation-skipping transfer (GST) tax purposes.¹ The election preserves the first spouse’s GST exemption, which in 2026 shelters up to $15 million from an additional 40% tax on wealth passed to grandchildren and later generations.² Without it, that exemption can vanish at the first death, cutting a couple’s combined GST-sheltered amount in half.

Why the Election Exists

Since 2011, the federal estate tax exemption has been portable between spouses. If the first spouse dies without using their full exemption, the survivor can inherit the unused portion and add it to their own.³ The GST exemption does not work the same way. It is not portable.⁴ Each spouse’s $15 million GST exemption can only be used by that person or their executor.

Here is the trap. When the first spouse leaves assets in a standard QTIP trust, those assets qualify for the unlimited marital deduction and pay no estate tax at the first death. But for GST purposes, the surviving spouse is treated as the transferor. When the trust eventually terminates in favor of grandchildren, the transfer is measured against the survivor’s GST exemption. The first spouse’s exemption was never allocated to anything, and it disappears.

For a couple with $30 million hoping to move wealth to grandchildren tax-free, that lost exemption can mean an unnecessary $6 million GST tax bill. The reverse QTIP election is the fix.

What the Election Actually Does

The election flips the default rule for GST purposes only. When the executor of the first spouse’s estate makes it, the IRS treats the deceased spouse as the transferor of the QTIP trust assets for generation-skipping calculations, even though those assets qualified for the marital deduction and will be included in the surviving spouse’s estate for regular estate tax purposes.¹

That change lets the executor allocate the deceased spouse’s GST exemption to the trust. The word “reverse” is a little misleading. Nothing about the marital deduction, the estate tax deferral, or the surviving spouse’s income rights changes. The trust still pays income to the surviving spouse for life, the remainder beneficiaries stay locked in, and the assets still land in the survivor’s taxable estate at their death. Only the identity of the transferor for GST purposes moves.

Consider a husband who dies in 2026 and leaves $15 million in a QTIP trust for his wife, with their grandchildren as remainder beneficiaries. Without the election, his GST exemption goes unused, and his wife’s exemption would eventually have to stretch over both this trust and her own separate assets. With the election, his executor allocates his full $15 million exemption to the trust. When the wife dies and the trust passes to the grandchildren, it does so free of GST tax. Her own $15 million exemption is still intact for her separate assets. The couple has effectively doubled their GST-sheltered transfers.

Making the Election on Form 706

The election is made on the deceased spouse’s federal estate tax return, Form 706. The executor lists the qualifying QTIP property on Schedule R, Part I, line 9.⁵ There is no separate form and no special application. The deadline is the estate tax return deadline: nine months after the date of death, with a possible six-month extension.

Two rules trip up planners more than anything else.

All or nothing. The election must cover all property in the QTIP trust. An executor cannot apply it to just a slice of the trust. If the trust holds more than the decedent’s available GST exemption, the excess cannot be cleanly sheltered.⁵
Irrevocable. Once made, the election cannot be undone.

The trust also has to satisfy every requirement of a QTIP trust for the election to be valid: the surviving spouse must be the sole income beneficiary for life, income must be distributed at least annually, and no one may appoint trust assets to a third party while the surviving spouse is alive.⁶

Why Two Separate QTIP Trusts Are Common

The all-or-nothing rule is the reason careful drafters split the marital gift into two trusts from the outset. Suppose a deceased spouse has $15 million in GST exemption but wants to leave $25 million in trust for the survivor. A single QTIP trust would force the election to apply to the full $25 million, and only $15 million of exemption is available. The result is a nonzero inclusion ratio spread across the whole trust, so no part of it is fully GST-exempt.

The clean solution is two trusts. The first is funded with an amount equal to the decedent’s available GST exemption. The executor makes the reverse QTIP election on that trust and allocates the full exemption, giving it an inclusion ratio of zero. The second trust holds the remaining assets, receives no election, and is treated normally. The GST-exempt portion stays perfectly sheltered, and the taxable portion stays quarantined.

If the original documents used a single QTIP trust, the trustee can sometimes fix things after death through a qualified severance. Federal regulations allow a trust to be split into two on a fractional basis, provided local law permits the division and certain requirements are met.⁷ The split must be based on fractions or percentages of total trust value rather than fixed dollar amounts, the resulting trusts must preserve the same succession of beneficiary interests, and the funding must be completed within 90 days of the chosen valuation date. Done correctly, one resulting trust ends up with an inclusion ratio of zero and the other with an inclusion ratio of one. Workable, but more expensive than getting the structure right on the front end.

If the Election Was Missed

Missing the election on a timely-filed Form 706 does not automatically forfeit the exemption, but fixing it is not simple. The IRS has authority under Treasury Regulation 301.9100-3 to grant an extension of time for regulatory elections not made by the original deadline.⁸

To get relief, the taxpayer must show two things: that they acted reasonably and in good faith, and that granting the extension will not prejudice the government’s interests. A taxpayer is generally considered to have acted in good faith if they reasonably relied on a qualified tax professional who failed to make or recommend the election.⁸ Requests submitted before the IRS discovers the error on its own are stronger.

The mechanism is a private letter ruling request, which requires a detailed written submission with factual affidavits, legal argument, and a penalties-of-perjury statement. The IRS has granted relief in cases where attorneys or trustees missed the election, typically allowing 60 days from the ruling date to file a supplemental Form 706 with the reverse QTIP election on Schedule R.⁹ Relief is not available if the estate tax return is already under examination, and the user fee for a private letter ruling related to late elections runs over $12,000 before attorney fees. Small money against a lost $15 million exemption, but a strong reason to get the election right the first time.

1
Office of the Law Revision Counsel. 26 U.S. Code 2652 – Other Definitions
2
Internal Revenue Service. What’s New – Estate and Gift Tax
3
Office of the Law Revision Counsel. 26 U.S. Code 2010 – Unified Credit Against Estate Tax
4
Office of the Law Revision Counsel. 26 USC 2631 – GST Exemption
5
Internal Revenue Service. Instructions for Form 706 (09/2025)
6
Office of the Law Revision Counsel. 26 U.S. Code 2056 – Bequests, Etc., to Surviving Spouse
7
eCFR. 26 CFR 26.2642-6 – Qualified Severance
8
eCFR. 26 CFR 301.9100-3 – Other Extensions
9
Internal Revenue Service. Private Letter Ruling – Extension of Time to Sever QTIP Trust and Make Reverse QTIP Election