How Does a Mega Backdoor Roth Help You Save More for Retirement Tax-Free?
For families looking beyond the next generation, a Dynasty Trust can create something unusual in estate planning: a structure designed to preserve and manage wealth for children, grandchildren and descendants who may not be born for decades. The tax advantage can be substantial because assets that remain properly structured inside the trust may avoid repeated federal estate and generation-skipping transfer taxes as wealth passes from one generation to the next. That long time horizon also makes administration important, from investment oversight and tax compliance to Trusts Accounting and distribution decisions.
A Dynasty Trust is generally an irrevocable trust designed to hold assets for multiple generations rather than distributing them outright to each succeeding beneficiary. Its potential lifespan depends heavily on the law of the state governing the trust. Some states have eliminated or substantially relaxed the traditional rule against perpetuities, allowing properly drafted trusts to continue indefinitely or for centuries. Others impose a defined limit. For example, Nevada generally permits covered trust interests to vest or terminate within 365 years, Wyoming permits qualifying trusts to continue for up to 1,000 years, and Washington generally applies a 150-year rule against perpetuities period, subject to applicable state rules and requirements.
The key is that beneficiaries generally receive economic benefits from the trust without owning the trust assets outright. When a child dies, assets that remain in a properly structured trust generally do not become part of that child’s taxable estate. The same structure can continue for grandchildren and later descendants. That prevents the same pool of assets from potentially facing estate tax every time a generation dies. With the top federal estate and gift tax rate reaching 40%, avoiding repeated transfer-tax events can significantly affect long-term compounding. This is the basic objective behind an irrevocable trust estate tax strategy designed for multiple generations.
The federal generation skipping transfer tax generally applies when wealth is transferred to grandchildren or more remote generations. In 2026, each individual has a $15 million GST tax exemption, which matches the federal estate and gift tax exclusion. A taxpayer can allocate GST exemption to assets placed in a properly structured Dynasty Trust. If enough exemption is allocated, the trust can have a zero inclusion ratio, which can help keep future distributions from being subject to GST tax, subject to applicable rules. Unlike the estate tax exclusion, unused GST exemption cannot be transferred to a surviving spouse.
State law can determine whether a dynasty strategy lasts several generations or potentially indefinitely. South Dakota has abolished the common-law rule against perpetuities for qualifying trusts, while Delaware generally permits personal property to remain in trust without a perpetuities limit, although real property held directly in trust is generally subject to a 110-year rule. Pennsylvania largely eliminated its perpetuities restriction for interests created after December 31, 2006. Other states allow extremely long, but not unlimited, periods: Wyoming permits up to 1,000 years, Nevada 365 years, Texas 300 years and Washington 150 years. Situs therefore can materially affect multigenerational planning.
Assets with significant appreciation potential are often especially effective because future growth may occur outside descendants’ taxable estates. Examples can include diversified investment portfolios, closely held businesses, private equity interests, real estate interests and other assets expected to appreciate substantially over decades. Closely held business interests may also create planning opportunities when supported by appropriate valuation work, including analysis of Discounts for Lack of Control and Marketability.
Asset selection should also consider liquidity, income-tax consequences, administration and the family’s long-term objectives. The goal is not simply to move valuable assets into a trust. It is to position assets whose future growth can make the multigenerational tax structure worthwhile.
For more than four decades, Bennett Thrasher has provided businesses and individuals with strategic business guidance and solutions through professional tax, audit, advisory, and business process outsourcing services. Contact Bennett Thrasher’s Trusts & Estates Planning, or call us at 770.396.2200.
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