A GRAT transfers only the appreciation above the IRS hurdle rate and disappears at the end of its term. A dynasty trust, by contrast, compounds the entire principal and growth across generations, making it the far more powerful structure for families with a long time horizon and assets likely to appreciate steadily rather than in a single spike.
Dynasty Trust
A dynasty trust, domiciled in a perpetual-trust state like South Dakota, Nevada, or Delaware, holds assets outside your taxable estate indefinitely while distributing income or principal to beneficiaries across multiple generations. You fund it once, allocate your GST exemption (currently $13.61 million per person in 2024), and the trust compounds free of estate tax at every generation skip. Setup costs typically run $5,000 to $15,000 in legal fees, with ongoing trustee fees of roughly 0.5% to 1% of trust assets annually. For a deeper look at how the dynasty trust interacts with generation-skipping tax planning, see Dynasty Trust vs GST: How These Two Structures Actually Work Together. This structure fits families with $5 million or more who want a permanent, creditor-protected vehicle that outlasts any single lifetime.
Grantor Retained Annuity Trust (GRAT)
A GRAT lets you transfer the appreciation on an asset above the IRS Section 7520 hurdle rate to heirs completely gift-tax-free, with zero gift tax exposure if structured as a zeroed-out GRAT. You contribute assets, receive annuity payments back over the term (typically 2 to 10 years), and anything the assets earn above the 7520 rate passes to remainder beneficiaries free of gift tax. The main risk is mortality: if you die during the GRAT term, the assets snap back into your estate. Legal setup runs roughly $3,000 to $8,000, and there are no ongoing trustee fees beyond any investment management costs. GRATs work best for high-growth assets like pre-IPO stock or a business interest expected to appreciate sharply in a short window, and they are most effective when the 7520 rate is low.
Things people ask first.
Can you combine a dynasty trust and a GRAT?
Yes, and sophisticated planners do this regularly. The GRAT strips appreciation out of your estate quickly, and the remainder passes directly to a dynasty trust rather than outright to heirs, locking those gains into a perpetual, creditor-protected structure.
What happens to a GRAT if the grantor dies during the term?
If the grantor dies before the GRAT term ends, the IRS pulls the assets back into the taxable estate, erasing the transfer. This is the central risk of a GRAT, which is why short two-year rolling GRATs are a common strategy for older or less healthy grantors.
Which structure uses the GST exemption?
The dynasty trust is the primary vehicle for deploying your generation-skipping transfer (GST) exemption because it is designed to skip multiple generations. A standard GRAT does not skip generations on its own; the remainder typically passes to children, not grandchildren, unless structured specifically to skip.
What asset types work best in each structure?
GRATs excel with assets that are temporarily undervalued or expected to spike, such as pre-IPO shares, a business before a sale, or concentrated stock positions. Dynasty trusts work better with diversified portfolios, real estate, or operating businesses intended to stay in the family indefinitely.
Is a GRAT or dynasty trust better for asset protection?
The dynasty trust wins on asset protection, especially when domiciled in South Dakota or Nevada, which have strong spendthrift statutes that block creditors of beneficiaries. A GRAT offers no meaningful creditor protection because the grantor receives annuity payments back and the structure is temporary.
How much do I need to make either structure worth the cost?
A GRAT makes sense with a minimum of around $1 million in assets that are expected to significantly outperform the 7520 rate, otherwise the legal cost and complexity outweigh the benefit. A dynasty trust becomes genuinely impactful at $5 million or more, where the compounded multigenerational tax savings dwarf the setup and trustee fees.
Ready to stack a GRAT into a dynasty trust and lock in the gains permanently?
The Offshore Playbook covers exactly how to sequence a GRAT remainder into a South Dakota dynasty trust, which trustees to use, how to allocate your GST exemption efficiently, and what asset types belong in each structure. If you want the full execution map, this is where you get it.
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