Completed Gift vs. Incomplete Gift Trusts: Tax & Basis Planning

Estate planning contains a few phrases that sound more intuitive than they are. “Completed gift” is one of them.

Suppose you transfer $3 million of investments into an irrevocable trust for your children. Have you made a gift? Are the investments still part of your estate? Who pays the income tax? Will the investments receive a new tax basis when you die?

Surprisingly, the answers to those questions do not necessarily move together.

A trust can involve a completed gift while still being treated as owned by you for income-tax purposes. A trust can be a completed gift yet contain a retained right that causes estate-tax inclusion. An incomplete gift can sometimes be structured as a separate taxpayer. And the same provision that helps you avoid estate tax may cost your heirs substantially more in capital-gains tax.

The key is therefore not simply deciding whether you want a “completed” or “incomplete” gift. The real task is deciding which combination of gift-tax, estate-tax, income-tax, basis, control and flexibility consequences best fits your circumstances.

This article explains how those pieces fit together.

What Makes a Gift "Complete"?

For federal gift-tax purposes, the basic question is how much control you gave up.

A gift is generally complete when the donor has parted with enough dominion and control that the donor no longer has the power to change the disposition of the property. If the donor retains a power to take the property back, change who ultimately receives it, or alter beneficiaries’ interests in certain ways, the gift may remain wholly or partially incomplete.

That distinction has little to do with whether the trust document says “irrevocable” at the top.

An irrevocable trust can still contain retained powers sufficient to make a gift incomplete. Conversely, a donor can surrender enough control to complete the gift while retaining certain carefully limited powers that do not undo the desired tax treatment.

Consider a parent who transfers property into trust for three children but retains the right to decide later how much each child will receive. The parent has not completely relinquished the ability to determine where the property goes. Compare that with a trust irrevocably fixing each child’s beneficial interest while leaving investment decisions to a trustee. The second arrangement looks much more like a completed transfer.

There is another important wrinkle: an incomplete gift does not necessarily stay incomplete forever. If the donor later relinquishes the power that prevented completion, that event can complete the gift at that later date.

That can be useful. It can also be expensive.

If $2 million of property is transferred to an incomplete-gift trust and appreciates to $5 million before the donor relinquishes the relevant power, the later completed gift may be measured using the property’s value when the gift actually becomes complete. Delaying the decision therefore preserves flexibility, but appreciation during the waiting period can consume substantially more gift-tax exemption.

The Estate-Tax Case for a Completed Gift

The most familiar reason for making a completed gift is estate-tax reduction.

For 2026, the federal basic exclusion amount is $15 million per individual. The annual gift-tax exclusion is $19,000 per recipient, although that annual exclusion generally applies only to gifts of present interests; not every transfer to a trust qualifies. The top federal estate and gift tax rate is 40 percent.

A completed lifetime gift exceeding the annual exclusion generally uses some of the same unified gift-and-estate-tax exemption that would otherwise be available at death. In other words, giving away $5 million does not ordinarily create a new $5 million exemption. It uses $5 million of the exclusion you already had. So why make the gift early? Appreciation.

Suppose you own a business interest worth $3 million today. You expect it to be worth $8 million twenty years from now. If you make a properly structured $3 million completed gift today and the property thereafter remains outside your taxable estate, you use approximately $3 million of exemption. The subsequent $5 million of appreciation occurs outside your estate as well.

If instead you retain the property until death, the entire $8 million may be part of the estate-tax calculation.

For someone whose estate is likely to exceed the exemption substantially, moving rapidly appreciating property out of the estate can therefore produce enormous tax savings.

There is an important qualification hiding in the phrase “properly structured.” Gift-tax completion and estate-tax exclusion are related but separate questions. Sections 2036 and 2038, among other provisions, can bring transferred property back into a decedent’s gross estate where the decedent retained certain rights to enjoyment or certain powers to alter, amend, revoke or terminate the arrangement.

Calling something a completed gift is therefore not the end of the analysis.

The Estate-Tax Case for an Incomplete Gift

An incomplete gift does almost the opposite.

Because the transfer has not yet become a completed gift, merely funding the trust generally does not consume the donor’s gift-tax exemption. The donor also retains more 

flexibility over the ultimate disposition of the property.

The tradeoff is that the same retained rights that make the gift incomplete will frequently cause the property to remain in the donor’s taxable estate.

That sounds undesirable until you ask an important question:

Is estate-tax exclusion actually worth anything in my particular situation?

For someone with a projected $6 million estate and no realistic expectation of approaching the federal estate-tax exemption, removing $2 million from the estate may save exactly zero dollars of federal estate tax.

Yet giving that $2 million away may have another tax consequence that is very real.

It may sacrifice a basis adjustment at death.

Do Not Ignore Capital-Gains Basis

This is one of the most important considerations in deciding between completed- and incomplete-gift planning, because estate inclusion can determine whether appreciated property qualifies for a basis adjustment at death—often called a "step-up in basis."

Property acquired by gift generally carries over the donor’s basis, subject to special rules. Property included in a decedent’s estate and treated as acquired from the decedent generally receives a basis equal to its fair market value at death.

Consider an investor who bought stock for $200,000 that is now worth $2 million.

If the investor makes a completed gift of the stock to a trust designed to stay outside the investor’s estate, the trust generally carries the old basis. If the stock eventually grows to $5 million, there may be roughly $4.8 million of embedded appreciation.

If instead the stock remains includible in the investor’s estate and is worth $5 million at death, the property may receive a basis of approximately $5 million. Most or all of that built-in capital gain can disappear for income-tax purposes.

The IRS made this distinction especially clear in Revenue Ruling 2023-2. Merely treating an irrevocable trust as a grantor trust for income-tax purposes does not give its assets a basis adjustment at the grantor’s death if those assets are not included in the grantor’s gross estate.

That means “get everything out of the estate” can be poor tax planning for someone who is unlikely to owe estate tax.

Sometimes estate inclusion is a feature.

The ideal planning strategy may instead be to move high-growth, relatively high-basis assets outside the estate while retaining low-basis assets that would benefit substantially from a basis adjustment.

Tax planning should ordinarily be done asset by asset, not merely trust by trust.

Income Tax is a Separate Question

Another common source of confusion is the assumption that a completed-gift trust must pay its own income tax.

Not necessarily.

Federal tax law asks a different set of questions to determine whether a trust is a “grantor trust” for income-tax purposes. If the grantor retains one of various powers or interests specified in the Internal Revenue Code, the grantor may remain responsible for reporting the trust’s income even though the transfer was a completed gift for gift-tax purposes.

This separation creates a particularly powerful planning tool: the completed-gift grantor trust.

Imagine transferring appreciating assets into a trust outside your taxable estate while continuing to pay the income tax generated by those assets personally. The trust can grow without being reduced by its own income-tax bill, while your payment of that tax further reduces the property remaining in your estate. This is a benefit because the IRS has ruled that the grantor’s payment of income tax attributable to a grantor trust is generally not an additional gift to the trust beneficiaries.

There is a point where this advantage can become a burden. A highly profitable trust may generate a tax bill that eventually becomes uncomfortable for the grantor. Trust documents sometimes address this through tax-reimbursement provisions, but these require care. The IRS has ruled that a mandatory right to reimbursement can cause estate-tax inclusion, while trustee discretion to reimburse, standing alone and absent additional problematic facts, does not necessarily cause that result.

This is a good example of why seemingly small drafting choices matter.

A Non-Grantor Trust Changes the Calculus Again

A trust can instead be structured as a non-grantor trust, meaning the trust is treated as a separate federal income-taxpayer.

That can provide advantages in the right circumstances, but trusts face unusually compressed federal income-tax brackets. In 2026, an estate or trust reaches the 37-percent federal income-tax bracket once taxable income exceeds only $16,000.

Distributions to beneficiaries can shift some income-tax consequences away from the trust under the distributable-net-income rules, so the trust’s nominal tax bracket does not tell the whole story. Still, retaining substantial taxable income inside a non-grantor trust can be expensive.

There is yet another variation: the incomplete-gift non-grantor trust, commonly called an ING trust. When established under Wyoming law, this type of arrangement is sometimes called a WING—a Wyoming incomplete-gift non-grantor trust. (Wyoming also permits other sophisticated irrevocable trust structures, including the Wyoming Qualified Spendthrift Trust, whose gift- and income-tax treatment depends on how the trust is designed.)

An ING attempts to make the trust a separate income-taxpayer while preserving the transfer as an incomplete gift. These arrangements have sometimes been used for state income-tax planning, particularly where a trust can legitimately establish tax situs in a state imposing little or no income tax.

The IRS has issued favorable private letter rulings involving particular ING structures, but those rulings are nonprecedential, and the IRS currently identifies key questions concerning the interaction between incomplete-gift and nongrantor-trust status as areas on which it will not issue private letter rulings. State law matters enormously as well. States have increasingly adopted rules aimed specifically at ING arrangements.

Moving a trust to a tax-friendly state does not, by itself, erase the taxing jurisdiction of every other state connected to the grantor, beneficiaries, trustees, assets or income.

The Bottom Line

The question is not whether completed gifts are better than incomplete gifts.

A completed gift generally trades control and basis opportunities for the ability to use current gift-tax exemption and move future appreciation outside the taxable estate. An incomplete gift generally preserves more control, postpones use of gift-tax exemption and often preserves estate inclusion—and with it the possibility of a basis adjustment at death.

Income-tax treatment forms a separate axis entirely.

Before deciding how an irrevocable trust should be structured, estimate the client’s likely estate-tax exposure, examine the basis and appreciation potential of the assets involved, determine who should bear the trust’s income tax, identify the powers the settlor truly needs to retain, and consider what happens if today's assumptions turn out 

to be wrong.

Only then does “completed or incomplete?” become a useful question.

References

• Internal Revenue Code §§ 2001, 2010, 2502 and 2505. 

• Internal Revenue Code §§ 2503, 2511 and 2512. 

• Treas. Reg. § 25.2511-2. 

• Treas. Reg. §§ 25.2503-3 and 25.2512-1. 

• Internal Revenue Code §§ 2036 and 2038; Treas. Reg. §§ 20.2036-1 and 20.2038-1. 

• Internal Revenue Code § 1014; Treas. Reg. § 1.1014-1. 

• Internal Revenue Code §§ 641 and 661–662. Internal Revenue Code §§ 671–678; Treas. Reg. § 1.671-2. 

• Rev. Rul. 85-13, 1985-1 C.B. 184. 

• Rev. Rul. 2004-64, 2004-2 C.B. 7. 

• Rev. Rul. 2023-2, 2023-16 I.R.B. 658.

• Rev. Proc. 2025-32, 2025-45 I.R.B. 695. .

• Priv. Ltr. Rul. 201310002 (2013); Internal Revenue Code § 6110(k)(3). 

• Rev. Proc. 2026-3, 2026-1 I.R.B. 143. 

• North Carolina Department of Revenue v. Kimberley Rice Kaestner 1992 Family Trust, 588 U.S. 262 (2019). 

• John R. McGown, Jr., “State Taxation of Trusts and Their Beneficiaries When There Are Multiple State Contacts,” 39 ACTEC Law Journal 387 (2013).