Generation-Skipping Trust: How to Pass Wealth to Grandchildren Tax-Efficiently

How the Generation-Skipping Transfer Tax Works

The GST tax is imposed on transfers to beneficiaries who are two or more generations below the transferor. The tax rate is equal to the maximum federal estate tax rate (40% in 2024). Each individual has a lifetime GST exemption of $13.61 million (indexed for inflation, $27.22M for married couples). Transfers that exceed the exemption are taxed at 40%. The GST tax applies to direct skips (you give assets directly to a grandchild), taxable terminations (a trust ends and assets pass to skip beneficiaries), and taxable distributions (a trust distributes income or principal to skip beneficiaries). Proper planning ensures your transfers stay within the exemption, avoiding the punitive GST tax. Review estate planning fundamentals →

Dynasty Trusts: Multi-Generational Wealth

A dynasty trust is a long-term generation-skipping trust designed to last for multiple generations — in some states, forever. The trust is structured to avoid estate taxes at each generation by keeping assets in the trust rather than distributing them to beneficiaries outright. Beneficiaries receive income and certain distributions from the trust, but the principal remains in the trust and is managed by professional trustees. States like Delaware, South Dakota, Alaska, Nevada, and Wyoming have abolished the rule against perpetuities, allowing trusts to exist indefinitely. A $5M dynasty trust growing at 6% for 100 years would be worth over $1.5 billion — all protected from estate taxes at each generation. The key requirements are: the trust must be irrevocable, the grantor must allocate GST exemption to the trust, and distributions must be limited to avoid including trust assets in beneficiaries' estates.

GST Trust Planning Strategies

The most common GST trust strategy is to allocate your GST exemption to irrevocable trusts that benefit your children and then pass to grandchildren. The trust can pay income to your children during their lifetimes, and upon their death, the principal passes to grandchildren tax-free. Another strategy is the direct skip: making gifts directly to grandchildren or trusts for their benefit, using your GST exemption. Married couples can elect GST splitting, allowing each spouse to use their exemption on separate trusts. Annual exclusion gifts (up to $18,000 per recipient in 2024) can also be structured as GST-exempt transfers. For very wealthy families, a dynasty trust combined with annual GST-exempt gifting can move significant wealth across generations without triggering transfer taxes. Medical and educational expenses paid directly to providers are exempt from both gift tax and GST tax, providing additional planning opportunities.

GST Trust vs Direct Inheritance: Tax Comparison

The tax savings from GST trusts are dramatic over multiple generations. Direct inheritance: Grandparent dies with $13.61M, passes to child tax-free (covered by estate exemption). Child invests, grows estate to $20M, dies, passes to grandchild. Estate tax at child's death: 40% of $6.39M (amount over $13.61M exemption) = $2.56M. Grandchild receives $17.44M. GST trust: Grandparent funds GST trust with $13.61M. Trust grows to $20M. Child receives income for life. At child's death, $20M passes to grandchild. Estate tax: $0. Grandchild receives full $20M. The difference grows exponentially with longer time horizons and higher growth rates. Over three generations, the tax savings can exceed $100M for a $13.61M initial transfer growing at 7-8%. Understand inherited IRA rules for non-trust beneficiaries →

What is the GST tax exemption for 2024?

The GST tax exemption for 2024 is $13.61 million per individual ($27.22 million for married couples). This amount is indexed for inflation and typically increases each year. Any transfers above this exemption are subject to the GST tax at 40%. It is crucial to allocate your GST exemption to trusts at the time of funding — if you miss the allocation deadline, the trust may be partially or fully subject to GST tax. Proper record-keeping and timely filing of Form 709 (Gift Tax Return) are essential to preserve the exemption.

Can a GST trust last forever?

In states that have abolished the rule against perpetuities, yes. States like Delaware, South Dakota, Alaska, Nevada, and Wyoming allow trusts to exist indefinitely — these are called dynasty trusts. In states that still have the rule against perpetuities, trusts typically last for 21 years after the death of all beneficiaries living when the trust was created (roughly 90-100 years). The trust's governing documents, the state where the trust is administered, and the trustee's location all affect trust duration. Choosing a trust-friendly state for trust administration can ensure your wealth is protected for as many generations as state law allows.

What is the difference between a GST trust and a regular trust?

A regular trust that leaves assets in trust for children and then to grandchildren may still subject the assets to estate taxes at the children's deaths. The trust assets would be included in the children's estates if they have certain powers (like the ability to withdraw assets). A GST trust is specifically designed with GST exemption allocated to it, so assets pass from grandparent to grandchildren (and beyond) without estate taxes at the intermediate generation. The difference is entirely in the tax treatment: a GST trust is structured to avoid the 40% estate tax at each generational level, while a regular trust only avoids probate but does not provide multi-generational tax savings.

When should I set up a generation-skipping trust?

A GST trust makes sense if you have significant assets (typically over $5M) and want to preserve wealth for future generations. It is especially valuable if you already have enough assets to provide for your children through other means and want to use your GST exemption to benefit grandchildren. The ideal time to set up a GST trust is when you can use your full GST exemption — either through lifetime gifts or at your death. Current law sunsets the $13.61M exemption in 2026, when it is scheduled to revert to approximately $6M to $7M (adjusted for inflation). This makes 2024 and 2025 critical years for high-net-worth families to act.

Related Resources