Generation Skipping Transfer Tax: What It Is and When It Applies
Passing wealth to grandkids? The Generation-Skipping Transfer Tax can add a 40% hit. Learn when it applies and how to plan smart before it's too late.
Written by: Chris Sternau
Date of publication: 26.01.2026
Table of Contents
You’ve likely planned for standard estate and gift taxes. But if your vision extends past your children to your grandchildren or even great-grandchildren, there’s a critical, often overlooked layer of the tax code you must understand. If you’re still building (or refreshing) your foundation, start with when to begin estate planning.
The GSTT sits quietly alongside the federal estate and gift tax system, surfacing only when wealth moves past the next generation. For those it applies to, the cost of ignoring it can be steep. This article explores generation skipping transfer tax planning in detail. Keep reading to stay updated. For the broader framework GSTT fits into, see wealth transfer planning: how to do it right.
Key Takeaways
- GSTT is a “second layer” tax that applies when wealth transfers skip a generation (e.g., to grandchildren or great-grandchildren), alongside estate and gift taxes.
- A “skip person” is typically 2+ generations below the donor (often measured by a 37½-year age gap), with key exceptions like the deceased parent rule.
- GSTT can arise in three main ways: direct skips, taxable distributions from a trust to a skip person, and taxable terminations when a non-skip beneficiary’s interest ends.
- The tax rate is flat and high — equal to the top federal estate tax rate (40% in 2025–2026) - and depends on the taxable value after applying available exemption and trust inclusion ratios.
- Planning success hinges on exemption allocation + proper filing (Form 709/706 and GST schedules). Trust mistakes and poor records can create unexpected tax bills years or decades later.
Generation Skipping Transfer Tax (GSTT): Overview
What Is Generation Skipping Transfer Tax?
GSTT is a federal tax on the transfer of assets to a “skip person.” This is someone who is at least two generations below the donor. Think of it as a secondary layer of protection for the IRS. While the standard gift and estate taxes cover transfers from you to your children, the GSTT ensures that you cannot simply “skip” your children to avoid the estate tax that would have naturally occurred when the assets passed from your children to your grandchildren.
Why the GSTT Exists
Before 1976, wealthy families utilized a significant loophole. By placing assets in perpetual trusts or gifting directly to grandchildren, they could effectively move wealth through centuries while only paying estate tax once at the very beginning. Since trusts are where the complexity lives, here’s a practical primer on how trust taxation works.
Congress viewed this as an unfair loophole. Families with access to sophisticated planning were avoiding transfer taxes, while others were paying estate tax at each generation. The generation skipping transfer tax was created to close that gap.
Today’s skip a generation tax reflects that same policy goal. If wealth bypasses an entire generation, the IRS ensures that a transfer tax is still collected.
Understanding Key Terms
Skip Person Defined
Under federal rules, an individual who is more than 37½ years younger than the person making the transfer may be treated as a skip person, unless an exception applies. There is also an important exception known as the deceased parent rule. If a child of the transferor has already passed away, that child’s children are treated as belonging to the child’s generation, not the skip generation.
Taxable Transfers vs Non-Taxable Transfers
Not every transfer to a skip person triggers tax. The IRS categorizes generation skipping tax transfers into specific buckets:
- A direct skip is a transfer made outright, or in trust, directly to a skip person.
- A taxable distribution occurs when a trust makes a distribution to a skip person while a non-skip beneficiary is still alive.
- A taxable termination occurs when a non-skip beneficiary’s interest in a trust ends, often due to death, and the remaining assets pass to skip persons.
Understanding these categories matters because who pays the tax and when it is due depends on the type of transfer involved. On the admin side, trustees often need tight documentation — this trust tax preparation checklist.
When Does the Generation Skipping Transfer Tax Apply?
Direct Skips
A direct skip is the cleanest generation skipping transfer tax example. A grandparent writes a check to a grandchild or transfers securities directly into the grandchild’s name. If the amount exceeds the annual exclusion and available exemptions, the GSTT applies immediately. The transferor, or the transferor’s estate, is responsible for the tax.
Trust-Based Transfers
Most real-world GSTT planning happens inside trusts. Trusts introduce flexibility, but they also introduce complexity. If assets are placed into a trust that benefits both children and grandchildren, the GSTT may not apply right away. It often arises later, when distributions are made to grandchildren or when the children’s interests end.
Trust-based planning is where mistakes are most common. Failing to properly allocate an exemption at the time of funding can result in unexpected tax years or even decades later.
Interaction With Estate and Gift Tax Events
The generational skipping tax does not operate in isolation. It is tied closely to estate and gift tax events. A lifetime gift to a skip person can trigger gift tax and GSTT. A bequest at death can trigger estate tax and GSTT. In both cases, exemptions and credits must be coordinated carefully to avoid unnecessary overlap. If you want the bigger estate-vs-wealth-transfer context (and where tax strategy fits), read estate planning and wealth transfer strategies.
Planning Wealth Transfer Beyond Your Children?
How the Generation Skipping Transfer Tax Is Calculated
GSTT Tax Rate
The generation skipping tax rate is simple, at least on paper. It is equal to the highest federal estate tax rate, which is 40 percent for 2025 and 2026. There are no brackets. Once a transfer is taxable, it is taxed at a flat rate. Families who may actually face that rate usually look at broader structuring — here’s an overview of tax structures for high net worth families.
Tax Base and Inclusion Amount
The GSTT is calculated on the taxable value of the transfer after applying any available exemption. This amount is known as the inclusion amount. For trusts, the inclusion ratio determines how much of a trust is exposed to GSTT. A trust with a zero inclusion ratio is fully exempt. A trust with an inclusion ratio of one is fully taxable.
Practical Examples
Scenario A:
A grandmother gives her grandson $100,000 in 2025. She uses her $19,000 annual exclusion. The remaining $81,000 is applied against her lifetime GSTT exemption. No tax is paid today.
Scenario B:
A wealthy individual who has already exhausted their lifetime exemption gives $1 million to a great-nephew. They would owe $400,000 in GSTT on top of any applicable gift taxes.
GSTT Exemptions and How They Work
GSTT Tax Exemption Basics
The generation skipping transfer tax exemption is unified with the federal estate and gift tax exemption. For 2025, it is $13.99 million per individual and $27.98 million for married couples. For 2026, it is indexed for inflation and expected to increase modestly.
This exemption shelters assets from GSTT, not just at the time of transfer, but also future appreciation if allocated properly.
Allocating Exemption
Allocation matters. Some allocations happen automatically. Others must be made intentionally on a timely filed return. This is where many people stumble. Automatic allocation rules do not always produce the desired result, especially with complex trusts. Once an exemption is wasted or misapplied, it cannot be recovered.
For families asking how to avoid generation-skipping tax, proper exemption allocation is usually the starting point.
Compliance, Filing, and Documentation
Reporting GSTT
Most generation-skipping transfers are reported on IRS Form 709 for lifetime gifts or Form 706 for transfers at death. Separate schedules track GSTT exemption allocation. Even when no tax is due, reporting is often essential to preserve the exemption and establish a clear record.
Recordkeeping Best Practices
GSTT planning is long-term planning. Records must outlive the transferor. Trust documents, allocation elections, and valuation support should be maintained indefinitely. Clean records are not just about compliance. They prevent confusion and disputes years down the line.
Conclusion: Why GSTT Matters in Wealth Transfer Planning
Understanding the generation skipping transfer tax is not an academic exercise; it’s a fundamental component of sophisticated estate planning. This tax exists to ensure wealth is taxed at each generational transfer, closing historical loopholes.
For most American families, the current $13.99 million exemption means the GSTT tax is a non-issue. However, for those with significant assets, the 40% flat rate is a powerful incentive to plan early.
The rules are precise, the stakes are high, and the margin for error is slim. With this in mind, consulting with an experienced tax advisor is a prudent move if you’re going to navigate the rules efficiently, make timely elections, and structure your legacy to benefit your grandchildren and beyond.
FAQ
- Q1: What’s the simplest way to explain GSTT?
A: GSTT is an extra federal tax that can apply when you transfer wealth to someone two generations below you, like a grandchild, so you can’t “skip” estate tax at your child’s level.
- Q2: Who counts as a “skip person”?
A: Usually a grandchild, great-grandchild, or anyone at least two generations below you. Age can matter too - someone more than 37½ years younger may be treated as a skip person unless an exception applies.
- Q3: Does giving money to a grandchild automatically trigger GSTT?
A: Not always. Small gifts may fall under the annual exclusion, and larger gifts may be covered by your lifetime exemption if properly allocated. GSTT typically shows up when exclusions/exemptions aren’t available.
- Q4: How does GSTT work with trusts?
A: Trusts can delay GSTT. It may arise later when the trust pays a grandchild (taxable distribution) or when a child’s interest ends and assets pass to skip persons (taxable termination).
- Q5: What’s the difference between gift/estate tax and GSTT?
A: Gift and estate tax cover transfers to the next generation. GSTT applies when transfers leap past that generation. A single transfer can trigger both, so coordination of exemptions is critical.
- Q6: What is the “inclusion ratio,” and why should I care?
A: It measures how much of a trust is exposed to GSTT. Allocate enough exemption and the ratio can be zero (fully exempt). Get it wrong and part - or all - of future trust value may be taxed.
- Q7: What forms do you need to file for GSTT planning?
A: Lifetime transfers are reported on IRS Form 709; transfers at death are reported on Form 706. Even if no tax is due, filing can lock in exemption allocations and protect your plan.
- Q8: What’s the biggest GSTT mistake families make?
A: Failing to allocate GST exemption when funding a trust. That error can create a surprise tax bill years later, after the assets have grown - when it’s much harder to fix.
