A dynasty trust is a rare estate planning tool built to last for generations, shielding assets from estate taxes, creditors, and divorce settlements at each generational transfer.
While a typical trust usually terminates once the beneficiaries reach a certain age or the assets are distributed, a dynasty trust can hold and grow wealth indefinitely. An experienced estate planning attorney can evaluate your assets for suitability.
Why Most States Can’t Do This
Historically there was a common law rule against perpetuities which prevented trusts like this. The rule required property interests to “vest” within a life in being plus 21 years, capping most trusts at roughly 90 years, or two to three generations.
Illinois has done away with this limitation for trusts. Under the Illinois Trust Code, the rule against perpetuities does not apply to a “qualified perpetual trust,” allowing a properly drafted trust to continue indefinitely instead of terminating after a set number of years.
The Tax Advantage: Generation Skipping Transfer Tax
A dynasty trust’s main financial benefit comes from the federal generation skipping transfer tax (GST). The GST tax applies a flat 40 percent rate, on top of any regular estate or gift tax, to large transfers made to “skip persons,” typically grandchildren, closing the loophole of skipping a generation to avoid a full round of estate tax.
Every person, however, has a lifetime GST exemption that runs alongside the federal estate and gift tax exemption. Following 2025 federal tax changes, that exemption is now a permanent $15 million per person ($30 million per married couple) with no scheduled expiration. By allocating GST exemption to a properly structured dynasty trust a grantor can fund the trust once, pay any tax due at that single transfer, and then let the assets pass to children, grandchildren, and later descendants without triggering estate or GST tax again at each generational transfer—as long as the assets stay inside the trust.
Illinois-Specific Considerations
Illinois residents funding a dynasty trust still need to account for the state’s own estate tax, which is separate from the federal system. The state imposes its own estate tax on estates that exceed $4 million, with no portability between spouses and no equivalent GST exemption at the state level. That means a large transfer into a dynasty trust can still trigger Illinois estate tax at the time of funding, even where federal GST exemption fully covers the transfer. Coordinating contribution size and timing with an Illinois estate planning attorney, not just the federal exemption numbers, is essential to avoid an unnecessary tax bill.
Illinois’ trust decanting and directed trust statutes also let trustees modify outdated terms or delegate investment decisions to specialized advisors, a practical advantage for a trust that may outlive its drafters by a century or more.
Asset Protection Benefits
Beyond tax savings, dynasty trusts can keep assets out of reach of a beneficiary’s creditors, business liabilities, or a divorcing spouse, under the right conditions. Because trust assets are typically owned by the trust rather than any individual beneficiary, they generally fall outside of the marital estate in a divorce and outside the reach of a beneficiary’s personal creditors, provided the trust is properly drafted with these protections in mind.
Is a Dynasty Trust Right for Your Family?
Dynasty trusts are typically most useful for families with assets well above the $4 million Illinois threshold, or those anticipating significant future growth in a family business, real estate, or investment portfolio. Because these trusts are irrevocable and meant to last indefinitely, drafting one requires careful decisions about trustees, distribution standards, and successor generations. The estate planning attorneys at Legacy & Life Law can help you decide whether a dynasty trust, traditional trust, or a combination of tools best fits your family’s long-term goals. Call for a consultation today.