Spousal Lifetime Access Trusts (SLATs): Advantages, Pitfalls, and a 2026 Planning Guide

            When it comes to federal transfer tax planning, one of the most underutilized tools has been the Spousal Lifetime Access Trust, or SLAT. For high-net-worth married couples, SLATs can offer a rare combination of tax efficiency and flexibility, crucial for long-term tax planning.

What Is a Spousal Lifetime Access Trust?

            A Spousal Lifetime Access Trust is an irrevocable trust, created by one spouse, the “grantor”, for the benefit of the other spouse, and their children and other descendants. The beauty of the SLAT lies in its ability to see the transfer of assets to the trust as a finalized gift, removing those assets and all future appreciation out of the grantor’s taxable estate.

             At the same time, because the beneficiary spouse may receive distributions under the trust’s terms, the couple can retain indirect access to the trust assets during their joint lifetimes if needed. For many couples, this balance between tax savings and flexibility in accessing trust funds if necessary is what makes a SLAT far more appealing than an outright lifetime gifting.

Why SLATs Matter Now: Planning Ahead

            Under the One Big Beautiful Bill Act, the federal estate and gift tax exemption has increased to $15 million per individual for gifts and deaths occurring in 2026, up from $13.99 million in 2025. For married couples, this effectively allows up to $30 million to pass free of federal estate or gift tax. Notably, the Act makes this higher exemption amount “permanent” and indexed for inflation, with no built-in sunset provision. That is a meaningful change from prior legislation, which often included automatic reductions after a set period.

            Even so, history has shown that estate tax exemptions are not immune from future legislative revision. Exemption levels can change, and sometimes quickly. For that reason, many families continue to explore planning strategies that move assets, and their future appreciation, out of their taxable estates while current exemption levels remain favorable. SLATs remain one of the most flexible ways to do this.

Key Advantages of SLATs for High-Net-Worth Couples

1. Estate Tax Reduction Without Giving Up Financial Security. One of the most compelling features of a SLAT is the ability to reduce estate tax exposure without fully relinquishing access to wealth. Because the beneficiary spouse can receive discretionary distributions, trust assets may still be available to support the family if needed. This feature often makes SLATs more attractive than outright gifts, particularly for clients who are asset-rich but have concerns about their future needs and long-term liquidity.
2. Grantor Trust Income Tax Benefits. A SLAT is taxed as a grantor trust, which means that the trust is a pass-through entity when it comes to income taxes. As a result, the grantor spouse continues to pay the income tax on trust earnings allowing the trust assets to grow without being reduced by income taxes and the grantor’s tax payments are not treated as additional taxable gifts.  Over time, this “tax burn” can significantly enhance the overall effectiveness of the wealth transfer to future generations.
3. Asset Protection Considerations. While California does not offer the same asset-protection trust laws as some other states, a properly structured SLAT can still provide meaningful protection from future creditors and claims. Many California clients further strengthen these protections by selecting an out-of-state trust situs, such as Nevada, where appropriate and permitted.

Selecting Assets to Fund a SLAT

Choosing the right assets to fund a SLAT is just as important as the trust structure itself. Because the primary objective is usually to shift future appreciation out of the taxable estate, not all assets are equally effective.

1. Highly Appreciating Assets. Assets with significant growth potential are ideal SLAT funding candidates. Transferring these assets earlier effectively “freezes” their value for estate tax purposes and allows the assets to appreciate tax free for the benefit of the beneficiaries. Common examples include:    Founder or early-stage equity
   Pre-IPO stock
   Closely held business interests
   Growth-oriented real estate
   In an environment where future exemption levels remain uncertain, these assets often provide the greatest planning leverage.
2. Life Insurance. Life insurance is another asset well suited for SLATs. When a SLAT owns life insurance on the grantor’s life, the death benefit is generally excluded from the taxable estate.  Trust-owned policies can also provide liquidity to pay estate taxes or equalize inheritances, while protecting proceeds from creditors or divorce claims involving beneficiaries.
3. Marketable Securities and Investment Portfolios. Growth-oriented investment portfolios may also be appropriate SLAT funding assets, particularly when the intent is long-term appreciation rather than immediate liquidity. That said, capital gains planning and basis considerations must be evaluated carefully, especially in California, where income tax rates are high and capital gains do not receive preferential treatment.
4. Assets that May be Less Suitable. Not every asset belongs in a SLAT. Assets that should not be used to fund a SLAT are assets relied on for living expenses, low-growth or depreciating assets, and assets where a step-up in basis at death is a primary planning objective. Irrevocable planning should never compromise financial stability.

Specific Issues and Common Pitfalls

            Despite their advantages, SLATs are not one size fits all solutions and can be disregarded by the IRS if poorly drafted and/or planned out. To ensure the SLAT is respected by the taxing authorities requires careful drafting and coordination with broader estate, tax, and marital property planning.

            Additionally, SLATs are often marketed as a straightforward way for married couples to remove assets from their taxable estate while preserving indirect access through a beneficiary spouse. While conceptually elegant, the strategy becomes significantly more nuanced for long-term married couples living in community property states like California. At its core, a SLAT requires one spouse (the “donor spouse”) to make a completed gift of their separate property to an irrevocable trust for the benefit of the other spouse (and typically descendants). The tax effectiveness of the strategy depends on that transfer being treated as a bona fide completed gift, meaning the donor spouse must relinquish dominion and control over the transferred assets.

            Here is where community property law creates friction. In long-term marriages, most wealth has been commingled or acquired during marriage, and is therefore presumed to be community property. A transfer of community property into a SLAT, without more, raises a threshold issue: what exactly is being gifted? Because each spouse already owns an undivided one-half interest in community property, funding a SLAT with community assets can undermine the characterization of the transfer as a completed gift by one spouse. To address this, practitioners typically require a pre-funding transmutation agreement, converting community property into the separate property of the donor spouse prior to the transfer. However, this introduces its own risks and considerations:

            Validity and Documentation: Transmutations must strictly comply with applicable statutory requirements, including express written declarations. Sloppy or informal documentation can unravel the entire planning strategy.
Step-Up in Basis Concerns: Community property enjoys a full step-up in basis at the first spouse’s death under IRC § 1014(b)(6). Converting assets to separate property and transferring them to a SLAT may forfeit this benefit, creating a potential income tax tradeoff.
Reciprocal Trust Doctrine: If both spouses create SLATs for each other using similar assets or timing, the IRS may collapse the arrangement, effectively pulling assets back into both estates.
Creditor and Divorce Risk: Once assets are transmuted and transferred, they are no longer community property. This may have unintended consequences in the event of divorce or creditor exposure of the beneficiary spouse.
For long-term married couples, the takeaway is simple: a SLAT is not a plug-and-play strategy in a community property context. Proper structuring requires careful sequencing—often including transmutation, clear tracing of assets, and thoughtful consideration of both estate and income tax consequences.

Is a SLAT Right for You?

            SLATs can be an excellent strategy for married couples with significant assets who want to reduce estate taxes, protect family wealth, and preserve flexibility. They are particularly well suited for families with significantly appreciating assets or those looking to make strategic use of current high exemption levels. When properly designed and funded with the right assets, a SLAT can preserve today’s planning opportunities while maintaining flexibility for the future.

Erica Shepard is a trusts and estates attorney licensed in Nevada and California. She has been certified as a specialist in the areas of estate planning, trust and probate law by the California State Bar’s Board of Specialization, and she holds an advanced tax law degree (L.L.M.). She can be reached at shepard@portersimon.com.