How does generation-skipping transfer tax planning work?
Depends on allocation and trust design
The generation-skipping transfer (GST) tax under IRC §2601 applies at a flat 40% to transfers to grandchildren and other skip persons, in addition to gift or estate tax. For 2026, each person's GST exemption equals the $15,000,000 basic exclusion amount (§2631(c)). Allocating it gives a trust a zero inclusion ratio. Automatic allocation rules (§2632) may apply, but should be confirmed on Form 709.
Reviewed by Ebot Mbi, CPA, EA · Last reviewed · Law and figures current as of September 17, 2026
Key takeaways
- 2026 GST exemption: $15,000,000 per person; it is not portable to a spouse.
- The rate is the maximum estate tax rate, 40%, times the inclusion ratio.
- §2632(b) and (c) allocate exemption automatically to direct skips and certain GST trusts unless you elect out.
- Late allocations and §2642(g) relief can repair missed allocations, often at a higher value.
- Texas trusts created on or after September 1, 2021 can last up to 300 years (Property Code §112.036).
What it is
The GST tax is designed to tax wealth that skips a generation. A skip person is generally an individual two or more generations below you, such as a grandchild, or a trust whose interests are all held by skip persons. The tax applies to direct skips, taxable distributions, and taxable terminations.
A dynasty trust is a long-term trust for several generations. If GST exemption is allocated to cover the full value, distributions to grandchildren and later generations are not subject to GST tax, no matter how much the trust grows, as long as nothing is added without more exemption.
The tax applies on top of gift or estate tax. Without planning, a large transfer to grandchildren could face both a 40% gift or estate tax and a 40% GST tax. The GST exemption exists so that transfers up to the exemption amount avoid the second tax.
What the law says
IRC §2601 imposes a tax on every generation-skipping transfer. Under §2641, the rate is the maximum federal estate tax rate (40%) times the inclusion ratio. Section 2631(a) gives each individual a GST exemption that can be allocated to property he or she transfers, and §2631(c) sets the exemption equal to the basic exclusion amount under §2010(c), which is $15,000,000 for 2026.
Section 2632(b)(1) automatically allocates unused exemption to lifetime direct skips, and §2632(c)(1) automatically allocates it to indirect skips to GST trusts, in each case to the extent needed to make the inclusion ratio zero. You can elect out. If an allocation is not made on a timely gift tax return and is not automatic, §2642(b)(3) values a late allocation as of the date it is made. Section 2642(g)(1) provides relief for late elections.
Section 2651(e) generally moves a grandchild up a generation if the grandchild's parent (the transferor's child) has died before the transfer.
Requirements and tests
- Identify each transfer as a direct skip, a transfer to a GST trust, or a transfer to a non-skip trust.
- Confirm how exemption was allocated: automatically, by affirmative election, or by electing out, on Form 709 or Form 706.
- Keep the inclusion ratio at zero by not adding property to an exempt trust without allocating more exemption, and by keeping exempt and non-exempt property in separate trusts.
- Draft the trust within state perpetuities limits; in Texas, §112.036 allows interests to vest up to 300 years after the effective date for trusts that became irrevocable on or after September 1, 2021.
How it works
You transfer assets to a dynasty trust and allocate GST exemption equal to the value transferred. The trust has an inclusion ratio of zero, so later distributions to grandchildren and taxable terminations are not subject to GST tax. The gift itself uses your basic exclusion amount for gift tax.
If a trust has an inclusion ratio above zero, GST tax applies when a taxable distribution or taxable termination occurs, based on the value at that time. Growth in a non-exempt trust therefore increases the eventual GST tax.
Direct skips during life, such as a gift outright to a grandchild above the annual exclusion, are tax-exclusive: the donor pays the GST tax on top of the gift, and that payment is itself treated as an additional gift. Taxable terminations and taxable distributions are tax-inclusive: the tax is computed on the whole amount, and the trust or recipient pays it.
Estates can also allocate GST exemption on Form 706 to property passing at death, including to trusts created under the will or a revocable trust. Any exemption not allocated by the executor is allocated automatically under §2632(e).
Assumptions: Gift of $15,000,000 in 2026 to a trust for children and grandchildren; the donor's GST exemption and basic exclusion amount are each $15,000,000.; Exempt case: $15,000,000 of GST exemption allocated, so the inclusion ratio is 0.; Non-exempt case: the donor elected out of automatic allocation, so the inclusion ratio is 1.; When the last child dies, the trust is worth $30,000,000 (assumed) and passes to grandchildren: a taxable termination, with the tax paid from the trust.
| Gift tax on the transfer (within the exemption) | $0 |
|---|---|
| Exempt trust: GST tax at the termination | $0 |
| Non-exempt trust: GST tax (40% × 1 × $30,000,000) | $12,000,000 |
| Non-exempt trust: amount passing to grandchildren | $18,000,000 |
At these assumptions, the allocation decision is worth $12,000,000 at the termination, which is why the Form 709 allocation must be checked.
Illustration only; not a projection of your results.
Risks and IRS scrutiny
Risks include unintended automatic allocation to trusts that are unlikely to benefit skip persons, electing out by mistake, mixed inclusion ratios, additions to exempt trusts, grandfathered trusts that lose protection when modified, and valuation disputes. Late allocations use current values, which can require more exemption.
Who it is not for
This is not for families giving only to children outright, for estates well under the exemption with no multigenerational goals, or for families unwilling to maintain a long-term trust and its records.
Families using annual-exclusion gifts to grandchildren outright generally do not need to allocate exemption to those gifts, because §2642(c) gives them a zero inclusion ratio.
How ebotCPA helps
We review your Forms 709 and 706 to trace every allocation, identify trusts with inclusion ratios above zero, and prepare allocations, elections out, or §2642(g) relief requests. We coordinate with your attorney, who drafts the legal documents.
Book a $497 Case Analysis to have Ebot Mbi, CPA, EA review your facts before you act.
We coordinate with your attorney, who drafts the legal documents.
Frequently asked questions
What is the GST exemption for 2026?
$15,000,000 per person, equal to the basic exclusion amount under §2631(c).
Is GST exemption allocated automatically?
Often. §2632(b) allocates it to lifetime direct skips and §2632(c) to indirect skips to GST trusts unless you elect out. Confirm the result on Form 709.
What if I forgot to allocate GST exemption?
You may be able to make a late allocation, valued when made (§2642(b)(3)), or request relief under §2642(g). Automatic allocation may already have applied.
Is GST exemption portable to my spouse?
No. Only the gift and estate tax exclusion is portable.
Have facts like these?
Book a $497 Case Analysis to have Ebot Mbi, CPA, EA review your facts before you act.
