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Dynasty trusts and the generation-skipping tax

How families keep wealth compounding across generations without an estate tax at each death — and the special 40% GST tax built to stop them.

Ordinarily, wealth gets taxed at each generational death: you pay estate tax passing to your kids, they pay again passing to the grandkids, and so on — a 40% haircut each time it crosses a generation above the exemption. A dynasty trust aims to skip those repeated tolls by holding assets in trust for many generations, so the money compounds without an estate tax at each death. To police this, Congress created a separate tax: the generation-skipping transfer (GST) tax.

What the GST tax is

The GST tax is a flat 40% levy — on top of gift or estate tax — on transfers that 'skip' a generation, such as gifts directly to grandchildren or to a trust that benefits them. Its purpose is to stop families from dodging a layer of estate tax by leaping over their children. Crucially, though, every person has a GST exemption (equal to the estate-tax exemption) that can shelter transfers from it.

The dynasty trick: allocate GST exemption once, shelter forever

When you fund a dynasty trust, you allocate your GST exemption to it. From then on, the ENTIRE trust — including decades of future growth — is exempt from GST tax and from estate tax at each beneficiary's death. Allocating exemption to $10 million today can shelter a trust that grows to $50 million or more across generations.

Why 'dynasty' — and for how long?

Historically, the common-law 'rule against perpetuities' forced trusts to end within roughly a lifetime plus 21 years. Many states have repealed or extended that rule, allowing trusts to last for centuries or in perpetuity. Families often situate dynasty trusts in those states (South Dakota, Nevada, Delaware, and others are commonly cited) specifically for their favorable trust-duration and tax rules.

Three ways a transfer can 'skip'

Type	What it looks like
Direct skip	Gift or bequest straight to a grandchild
Taxable distribution	A trust distributes to a skip-person beneficiary
Taxable termination	A trust interest for a non-skip person ends, passing to skip persons

Generation-skipping transfer types

GST exemption is not automatic — allocate it deliberately

One of the costliest mistakes in this area is failing to properly allocate GST exemption to a trust, or mis-timing it so growth escapes the shelter. There are automatic-allocation rules, but they do not always land where you want. This is precisely the kind of detail that requires a specialized estate attorney and CPA — the numbers are large and the elections are technical.

Benefits beyond taxes

Creditor and divorce protection for beneficiaries across generations.
Control: you can dictate how and when distributions happen decades after your death (incentives for education, work, or milestones).
Consolidated family wealth that keeps compounding rather than being split and taxed at each death.

The bottom line

A dynasty trust lets wealth compound across generations without an estate tax at each death, and the GST tax is the 40% backstop Congress built to limit that — neutralized by properly allocating your GST exemption when you fund the trust. The strategy pairs long-duration trust states with careful exemption allocation, and it delivers creditor protection and multigenerational control as a bonus. It is among the most powerful and most technical tools in estate planning; it belongs with specialists, and nothing here is individualized advice.

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