Generation-Skipping Transfer Tax

The generation-skipping transfer tax (GSTT) is a federal tax levied on gifts or bequests that pass wealth directly from a grandparent (or older ancestor) to a grandchild (or younger descendant), bypassing the intermediate generation. Layered on top of gift tax and estate tax, it closes a loophole where wealthy families could transfer assets to skip-persons without triggering tax at each generation, letting dynasties accumulate wealth indefinitely without federal transfer-tax friction.

The problem the GSTT solves

Before the generation-skipping transfer tax was enacted in 1976 (and significantly revised in 1986), wealthy families could exploit a clever loophole in the federal transfer-tax system. The gift tax and estate tax are triggered when wealth moves from one person to another, but they are assessed at each transfer level. If a grandparent left assets directly to a grandchild in a will, gift tax would apply on that transfer. But if the grandparent left assets to an intermediate generation (the parent) in a trust, and the parent later left those assets to the grandchild, tax would apply at two levels: once at the parent’s death and again at the grandchild’s eventual transfer.

Clever trust structures could circumvent this double-tax result. A grandparent could establish a trust, fund it with assets, and structure the trust so that the parent received only income (not principal) during their lifetime. At the parent’s death, the trust corpus passed to the grandchild untouched, and no estate tax was owed on the parent’s estate (since the parent never owned the principal). The assets skipped a generation, and the family avoided an intervening estate tax. By nesting multiple such trusts or using other devices, dynastic wealth could persist indefinitely, compounding tax-free.

The GSTT was enacted to prevent this “dynasty trust” arbitrage. Under current law, the federal government imposes a separate transfer tax whenever wealth skips a generation, ensuring that each generational transfer—whether direct or indirect—bears its tax burden.

How the GSTT works

The GSTT applies to three types of transfers: direct skips (a gift directly to a skip-person), taxable terminations (when an interest in a trust held by a non-skip-person ends, and the trust corpus passes to a skip-person), and taxable distributions (when a trustee distributes income or principal from a trust to a skip-person while a non-skip-person still holds an interest).

A “skip-person” is anyone who is two or more generations below the transferor. If a grandmother gives $50,000 directly to her grandchild, that is a direct skip. If a grandmother funds a trust for her daughter’s lifetime, and upon the daughter’s death the trust passes to the grandchild, that is a taxable termination. If a trust pays principal to the grandchild during the daughter’s lifetime, that is a taxable distribution.

The tax rate on generation-skipping transfers is imposed at the top marginal estate tax rate—currently 40 percent (as of 2024). So a grandmother’s transfer of $1 million to a grandchild triggers not only gift tax (if the transfer exceeds the annual exclusion and lifetime exemption), but also GSTT at 40 percent on the same $1 million. The economic effect is punitive: $1 million transferred shrinks to roughly $600,000 after both taxes are applied.

The exemption and the annual exclusion

Like the gift tax and estate tax, the GSTT allows a lifetime exemption. Each individual has a “generation-skipping transfer tax exemption” that grows with inflation each year. In 2024, the exemption stands at approximately $13.6 million per person, or $27.2 million for a married couple (if they elect to “split” their exemptions). This exemption is separate from the estate tax exemption, though they operate in similar ways.

Additionally, the GSTT allows an annual exclusion for gifts to skip-persons. Gifts up to roughly $18,000 per recipient per year (in 2024) are excluded from GSTT. A grandmother can give her grandchild $18,000 annually tax-free (both from gift tax and GSTT perspective). Beyond that threshold, the GSTT applies to any remaining transfer.

The interplay between exemptions, annual exclusions, and the gift tax system creates a complex planning landscape. Wealthy families often hire estate-planning lawyers to coordinate GSTT exemption allocation across multiple transfers, trusts, and generations to minimize the total family transfer-tax burden.

Dynasty trusts and the GSTT

The GSTT made so-called “perpetual” or “dynasty” trusts less attractive but did not eliminate them. A dynasty trust is a trust designed to persist across multiple generations, with principal accumulating and distributing to descendants indefinitely. By careful drafting—particularly, by “sheltering” the trust corpus with the transferor’s GSTT exemption—a dynasty trust can pass wealth to grandchildren and subsequent generations while avoiding (or deferring) additional GSTT.

Here is how it works: Grandmother funds a dynasty trust with $13.6 million (her GSTT exemption) and instructs the trustee to hold and invest the assets for multiple generations, paying income to her children during their lifetimes and then to grandchildren, and so on. By allocating her exemption to the trust at funding, she ensures that all subsequent distributions—even centuries later—are exempt from GSTT, even though the trust has grown to $100 million or more through compounding. The GSTT exemption effectively allows one generation to shelter a vast amount of wealth from transfer tax for all subsequent generations.

This is why the GSTT exemption cap is economically significant. A family with $50 million in wealth cannot shelter it all in a single dynasty trust (unless multiple family members each contribute their exemptions). That $50 million dynasty trust, once the exemption is exhausted, will owe 40 percent GSTT on subsequent distributions to skip-persons. The tax applies to the distribution, not the growth, so the trustee can manage the tax liability by controlling the pace of distributions.

Complexity and compliance

The GSTT is notoriously complex. The IRS regulations span hundreds of pages; the statute itself contains provisions on deemed allocations, trusts with split treatment, and technical ordering rules. Estate-planning professionals must track GSTT exemption allocation across multiple trusts and family members, often using specialized software.

One common planning mistake is failing to allocate GSTT exemption to trusts at the right time. If a grandparent funds a dynasty trust without making a timely election to allocate GSTT exemption, the exemption may be “wasted,” and the trustee will later owe GSTT on distributions. Fixing this requires amendment or new trusts, adding cost and delay.

Another area of complexity is the definition of “generation.” The GSTT uses a kinship-based approach: a person is one generation below the transferor per each 25-year period. But families are diverse and non-traditional. Second marriages, adoptions, and blended families can complicate generation assignment. The IRS allows adjustments in some cases, but not all, creating planning uncertainty.

The sunset and policy debate

The current GSTT exemption of $13.6 million per person is set to sunset on December 31, 2025. Under the “sunset” rule, unless Congress acts, the exemption will revert to roughly $2 million per person (indexed for inflation) in 2026. This prospect has spurred wealthy families and their advisors to front-load large gifts to dynasty trusts and other vehicles before the exemption shrinks, shifting trillions of dollars into multi-generational trusts during 2024 and early 2025.

Policy economists and tax scholars disagree sharply on the GSTT’s merits. Critics argue that it is overly complex, that it encourages wasteful tax-planning expenses (law firms and planners charge hundreds of thousands of dollars to structure dynasty trusts), and that it conflicts with a democratic ideal that inheritance should not be a privilege of dynastic wealth. Defenders argue that the GSTT, despite its flaws, has successfully prevented the worst excesses of tax avoidance and that a true dynasty-trust tax would be simpler to administer (and more politically unpalatable for the wealthy).

Planning strategies

Families use several strategies to manage GSTT liability. One is the “credit shelter trust” (or “bypass trust”), where a deceased spouse’s exemption is sheltered in a trust that provides for the surviving spouse but does not include the surviving spouse’s assets in their estate—thus preserving the exemption for children and grandchildren. Another is the “intentionally defective grantor trust” (IDGT), which is exempt from GSTT if properly structured, allowing intergenerational wealth transfer with minimal tax.

Another approach is the “charitable remainder trust” combined with GSTT planning, allowing families to transfer wealth to charity in a way that reduces transfer-tax liability while providing income to family members. Sophisticated families also use life insurance, where the insurance proceeds fund trusts that benefit multiple generations, and the GSTT is calculated on the proceeds rather than the family’s liquid assets.

See also