"Intentionally defective" is a planning nickname, not a defect in the instrument. The trust is drafted so that the settlor is treated as the owner for U.S. income tax under the grantor-trust rules — Sections 671 through 679 — and so that the transfer is nonetheless complete for gift and estate tax. The income-tax "defect" is the point. Transactions between the grantor and the trust are generally disregarded. The grantor reports the trust's income. If the estate-tax design holds, the property itself is not in the estate, and the grantor's payment of the income tax is a further economic shift to the beneficiaries that is not, in the ordinary case, an additional gift.
Advisers then have a choice: give the asset to that trust, or sell it to the trust for a note. Both can move appreciation out of the estate. They consume very different amounts of exclusion, they leave different things behind, and they behave differently when the settlor is not a U.S. person. This article compares them. It is not tax advice. The rate, the basis, and the return are for the tax adviser; the instrument and the sale documents are the legal structure.
What a Completed Gift Does
A gift to the trust, if it is complete, uses the donor's basic exclusion amount to the extent the gift exceeds the annual exclusion — and the annual exclusion often does not apply, because a gift in trust is a future interest unless the instrument gives the beneficiary a present right that is real. For 2026, Rev. Proc. 2025-32 confirms a basic exclusion amount of $15 million for a U.S. citizen or domiciliary, under Section 2010(c)(3) as amended by Public Law 119-21, and an annual exclusion of $19,000 per donee for a present interest. The generation-skipping transfer exemption is also $15 million for 2026. Both the basic exclusion amount and the GST exemption are adjusted for inflation after 2026. A gift that can benefit grandchildren may need an allocation of GST exemption as well as gift-tax exclusion. That allocation is a tax-return decision, and missing it is expensive to repair.
The donee takes the donor's basis under Section 1015. There is no Section 1014 step-up at the donor's later death for property that was successfully removed from the estate. Appreciation after the gift accrues to the trust. If the trust is a grantor trust, the donor still reports the income, including gain on a later sale of the asset. Rev. Rul. 2004-64 is the usual reference for the tax payment itself: the grantor's payment of the trust's income tax is not an additional gift where the instrument does not give the trustee a mandatory right to reimburse the grantor. A mandatory reimbursement clause can create the opposite result, including estate inclusion. A discretionary reimbursement power in an independent trustee is a different draft, and it has to be read against that ruling rather than added because a form had the clause.
The gift is the cleaner estate-tax transfer. It is also the one that spends the most exclusion on day one. Families who are about to see a valuation step-up — a sale, a rollover, a fund realization — sometimes want that, because today's value is the value they would rather report. The timing and the partnership wrapper are covered in Rollover Equity: Transferring Interests Before the Valuation Step-Up and Gifting Ahead of a Liquidity Event.
What a Sale Does Instead
In a sale, the trust buys the asset. The grantor receives a promissory note. The gift, if the sale is for full value, is limited to whatever was transferred for less than value — commonly a seed gift made so the trust has equity of its own before it borrows from the grantor, and any difference between the sale price and fair market value. There is no statutory seed percentage. A convention in practice, and only a convention, is to fund the trust with a gift on the order of ten percent of the intended sale price so the note is not the trust's entire capital. Some structures add a guarantee. Neither the convention nor a guarantee is a safe harbor. A sale at a price the appraisal does not support is a part-gift, and a trust with no substance is a retained-interest fact pattern waiting for a name.
The note has to bear adequate interest. For a debt instrument issued in a sale, Section 1274 looks to the applicable federal rate, which the IRS publishes monthly and which depends on the term: short-term, mid-term, or long-term. A note that is below-market can also be analyzed under Section 7872, with foregone interest treated as a gift. Quoting a rate from memory is not useful. The rate that matters is the rate for the month of the sale and for the term of the note that is actually signed. The estate-tax idea, if the sale is respected, is arithmetic: the note, at that rate, stays in the grantor's estate; appreciation above the rate accrues to the trust. If the asset does not outperform the rate, the sale has moved less than a gift of the same asset would have moved, and the family has spent the cost of the structure to do it.
While grantor status continues, the sale is generally ignored for income tax. Rev. Rul. 85-13 is the standard citation: the grantor and the grantor trust are not separate taxpayers for this purpose, so the grantor does not recognize gain on a sale to the trust, and interest on the note is not separately taxed as if it were paid by a third party. The trust still has to be able to pay the note in cash when the note says so. "Ignored for income tax" is not "the note need not be paid." Forgiveness of the note is generally a gift. A failure to pay on the terms is a fact an examiner will read as evidence that the sale was not a sale.
Income Tax During the Term, and When Grantor Status Ends
During the term, the grantor reports the trust's income and gains. On a partial rollover, that can include gain on the cash slice, while the rolled units sit in the trust under Section 721 or, less often, Section 351. The tax payment reduces the grantor's estate without a further gift, within the lines of Rev. Rul. 2004-64. That is often why families choose a grantor trust over a non-grantor trust that would pay its own tax and thereby deplete the very property the gift was meant to grow.
Grantor status is not a permanent label. It ends when the power that caused it is released, when the instrument says it ends, or at death. If status ends while the note is still outstanding, the income-tax nonrecognition that depended on the grantor and the trust being the same taxpayer can end with it. Whether that produces recognized gain is fact-specific. It should be modeled before anyone relies on a long-dated note and an assumption that grantor status will be toggled off at a convenient time. Death of the grantor ends grantor status. The note is an asset of the estate. The property sold, if the sale was respected and no Section 2036 string remains, generally is not. Basis in the sold property stays a carryover basis in the trust; the family does not get a step-up in an asset that is outside the estate, and it does not get a step-up in the note beyond the note's own terms.
Which One Fits
A gift fits when the family is willing to use exclusion now, wants the appreciation out, and does not need a note paying the grantor back. It is usually the simpler document set. A sale fits when the asset's value would consume more exclusion than the family wants to spend, and when there is a credible case that appreciation will outrun the applicable federal rate. The sale leaves a receivable in the estate. The gift does not. Neither one preserves a Section 1014 step-up in the transferred asset. Families who want the step-up more than they want the asset out of the estate should not use either pattern for that asset.
A GRAT is the cousin, not the same tool. The donor retains a qualified annuity under Section 2702, the hurdle is the Section 7520 rate rather than a note, and death during the term generally brings the property back into the estate. A sale to an IDGT shifts the mortality risk into the note: the property is, if the sale holds, already out, and what comes back if the grantor dies is the unpaid note. Both techniques assume a U.S. grantor. The partnership that sometimes sits between the trust and the operating company has its own failure modes under Section 2036, which we cover in Family Limited Partnerships and Trust-Owned LPs.
Why International Families Often Cannot Use the Nickname
Grantor-trust status for a non-U.S. settlor is narrow. Section 672(f) generally prevents a foreign person from being treated as the owner of a trust except in limited cases, most importantly a real power to revoke and revest, or a trust whose only lifetime distributions are to the grantor or the grantor's spouse. Those are the foreign grantor trust patterns. They are often inconsistent with a completed gift. A sale to a trust that is not a grantor trust is an actual sale: gain is recognized, the note is a real debt between two taxpayers, and interest is real income. Calling the trust an IDGT on the cover page does not change that.
A non-resident alien's gift or sale of intangible property — stock, and generally a partnership interest — is often outside U.S. gift tax entirely, under Section 2501(a)(2). The reason U.S. families use a sale, which is to spend less exclusion, may not exist. The reasons that still exist are income tax, home-country tax, estate-tax situs of what is owned at death, and what the trust's classification does to U.S. beneficiaries. See U.S. Gift Tax for Non-Resident Aliens and FGT vs. FNGT for International Families.
A U.S. person in the family does not, by being a beneficiary, turn the trust into an IDGT. The grantor is the person who has to be the owner under Sections 671 through 679. The ordinary case is someone already in the family who becomes a U.S. person — residency, a green card, substantial presence — or a child born a U.S. citizen, or a family that already has a U.S. person. If that person is the one who settles or funds a foreign trust with a U.S. beneficiary, Section 679 can treat them as the owner, which is a grantor-trust result with a different reporting stack, not a technique to elect into. If they are only a beneficiary of someone else's foreign non-grantor trust, the issue is throwback and Form 3520, not a note at the applicable federal rate. See When a Family Member Becomes a U.S. Person. If the vehicle that ends up holding the asset is a foreign eligible entity, classification still has to be chosen on purpose. See The Form 8832 Election in Offshore Holding Structures and, where the purchaser is a Canada LP owned by the trust, the partnership analysis that goes with it.
For a U.S. grantor with a completed instrument, a real appraisal, a note at the current applicable federal rate, and a willingness to pay the income tax, the sale is a recognized structure. For a non-U.S. settlor, the first question is whether grantor status is even available without keeping the asset in the estate. On a private wealth referral, that question comes before anyone circulates a note.