SLATs

What Is a SLAT?

A Spousal Lifetime Access Trust — universally called a SLAT — is a type of irrevocable trust that one spouse (called the grantor) funds for the benefit of the other spouse (and, typically, descendants). Because the gift into the trust is irrevocable and completed, it can use the grantor's lifetime exemption from estate and gift taxes, removing those assets — and all future appreciation — from the couple's combined taxable estate.

The trust is irrevocable, meaning the grantor cannot simply take the assets back. But because the other spouse is a named beneficiary, distributions from the trust to that spouse give the couple some continued, indirect access to the wealth. This is the central appeal: use the exemption now, yet retain a degree of household economic access through the beneficiary spouse.

To understand how SLATs fit into the broader landscape of trust-based planning, the article What Is a Trust? provides useful grounding on how trusts function generally.

How the Structure Works

The grantor spouse transfers assets — cash, marketable securities, interests in a family business, real estate, or other property — into the trust. The transfer is treated as a taxable gift, but it is sheltered by the grantor's available lifetime exemption, so no gift tax is actually owed if sufficient exemption remains. Once inside the trust, the assets are managed by a trustee, who may be an independent professional, a family member, or a corporate institution.

The trust document defines the distribution standard — the rules governing when and how the trustee may distribute funds to the beneficiary spouse. Common standards include distributions for health, education, maintenance, and support (often called the HEMS standard), or a broader discretionary standard. A more restrictive standard reduces the appearance that assets remain functionally available to the grantor, which has legal significance.

A SLAT is typically structured so that the grantor retains certain powers that cause it to be treated as a grantor trust for income-tax purposes. This means the grantor pays the income tax on trust earnings out of personal funds — a feature that is itself an additional tax-free gift to the trust, allowing the trust assets to compound without being eroded by income taxes. A qualified attorney must evaluate whether this treatment is appropriate for a specific family's circumstances.

The Reciprocal Trust Doctrine: The Classic Trap

Because SLATs are so useful, many couples are tempted to have each spouse create one for the other simultaneously. Spouse A funds a SLAT for the benefit of Spouse B; Spouse B funds a SLAT for the benefit of Spouse A. The intuitive appeal is obvious: both spouses use their exemptions, and both retain indirect access.

The reciprocal trust doctrine is the legal rule that can unravel this plan. Courts and the IRS have long held that if two trusts are interrelated — created at about the same time, in substantially similar amounts, with substantially similar terms — they will be "uncrossed." The result is that each grantor is treated as if they had created the trust for their own benefit, which means the assets are pulled back into each grantor's taxable estate, defeating the entire purpose.

Avoiding the reciprocal trust doctrine requires genuine, substantive differences between the two trusts. Differences in timing, asset types, trust terms, beneficiary classes, distribution standards, and trustee structures are all factors that attorneys consider. This is not a do-it-yourself checklist — it requires careful drafting and legal judgment. A qualified estate planning attorney must evaluate whether any particular pair of trusts is sufficiently differentiated.

Divorce and the Death of the Beneficiary Spouse

The indirect access that makes a SLAT attractive also creates meaningful personal risk. If the couple divorces, the beneficiary spouse remains a trust beneficiary — and the grantor spouse has permanently parted with the assets with no ongoing household benefit. The trust cannot simply be unwound. Depending on how the trust is drafted, the grantor may have no recourse at all.

The death of the beneficiary spouse presents a similar problem. Once the beneficiary spouse dies, the grantor's household has lost all access to the trust assets. The trust typically continues for the benefit of descendants, which may be consistent with the family's long-term goals — but the grantor spouse's personal financial plan must be stress-tested against this scenario before committing to the structure.

Some families address these contingencies through careful drafting: for example, permitting the trustee to add or remove beneficiaries using a power of appointment, or including provisions that shift beneficial interests on certain life events. Others ensure that sufficient assets remain outside the SLAT to support the grantor's lifestyle independently of any trust distributions. These decisions require coordination among estate attorneys, financial advisers, and the family itself.

Exemption Timing and Why SLATs Attract Attention

The lifetime exemption — the amount each person may transfer free of gift and estate tax during life and at death — is set by law, and it has changed significantly over time and may change again in the future. Readers should verify the current figure with a qualified CPA or estate planning attorney, as it is subject to legislative adjustment.

When the exemption is at a historically high level and legislation appears likely to reduce it, SLATs become a focal point of planning conversations. A gift made under a higher exemption is generally protected even if the exemption later drops — a principle sometimes called "use it or lose it." The fear of losing access to a large exemption creates urgency, and SLATs are one of the tools families sometimes evaluate because they allow a large gift while preserving some household access through the spouse.

This urgency can also create risk. Rushed planning — particularly when both spouses create trusts simultaneously to "use both exemptions" — is precisely when the reciprocal trust doctrine is most likely to apply. Speed and caution must be balanced carefully, which is another reason qualified legal counsel is essential before any trust is funded.

Potential Advantages and Disadvantages

These potential advantages and disadvantages are illustrative of general planning considerations, not a comprehensive evaluation of any specific family's situation. A qualified estate planning attorney and CPA must be involved in any analysis.

Questions to Explore with Advisers

Families considering a SLAT — or reviewing one already in place — may find it useful to raise the following questions with their legal and tax team:

• What assets are most appropriate to transfer into the trust, considering both tax efficiency and the grantor's liquidity needs outside the trust?
• How will the family maintain adequate financial resources for the grantor spouse if the beneficiary spouse predeceases?
• If both spouses wish to create SLATs, what specific structural differences will be built in to address the reciprocal trust doctrine?
• What distribution standard will govern the trustee, and how does that standard interact with estate inclusion risk?
• How does grantor-trust income-tax treatment affect the family's overall tax position, and is there a mechanism to toggle it off if circumstances change?
• How does this trust interact with other elements of the estate plan, such as GRATs, IDGTs, or dynasty trusts?
• What happens to the trust assets if the couple divorces, and has the attorney addressed this explicitly in the document?