Spousal Lifetime Access Trust (SLAT) — §2523

What is a SLAT?

A Spousal Lifetime Access Trust (SLAT) is an irrevocable trust created by one spouse (the donor spouse) for the benefit of the other spouse (the beneficiary spouse). The donor spouse makes a gift to the SLAT using their lifetime gift and estate tax exemption ($13.99 million in 2026). The assets in the SLAT are removed from the donor spouse's taxable estate, and any future appreciation on those assets also escapes estate tax.

The key advantage of the SLAT is that the beneficiary spouse retains access to the trust assets during their lifetime, providing the couple with indirect access to the gifted assets while still removing them from the taxable estate. The beneficiary spouse can receive distributions from the SLAT for health, education, maintenance, and support (HEMS) or other purposes specified in the trust document.

Gift Tax and Lifetime Exemption Planning

The SLAT is funded with a gift from the donor spouse to the trust. The gift uses the donor spouse's lifetime gift and estate tax exemption ($13.99 million in 2026, indexed for inflation). The gift is not subject to gift tax as long as it does not exceed the available exemption. The donor spouse must file a gift tax return (Form 709) to report the gift and elect to use the lifetime exemption.

The current high exemption amounts are scheduled to sunset after 2025 under the Tax Cuts and Jobs Act (TCJA), reverting to approximately $7 million per person (indexed for inflation). Practitioners should advise high-net-worth clients to fund SLATs before the exemption sunset to lock in the higher exemption amount. The IRS has confirmed in final regulations that gifts made before the sunset will not be subject to clawback.

Reciprocal Trust Doctrine: The Key Risk

The reciprocal trust doctrine is the most significant risk associated with SLATs. If both spouses create SLATs for each other (mirror SLATs), the IRS may apply the reciprocal trust doctrine to uncross the trusts, treating each spouse as the grantor of the trust they are the beneficiary of. This would cause both trusts to be included in the respective grantor's taxable estate, defeating the purpose of the SLAT.

To avoid the reciprocal trust doctrine, practitioners should differentiate the two SLATs in meaningful ways: different funding amounts, different funding dates (at least several months apart), different trustees, different distribution standards, different trust terms, or different beneficiaries. The more differences between the two SLATs, the lower the risk of the reciprocal trust doctrine being applied.

Grantor Trust Status and Income Tax Planning

SLATs are typically structured as grantor trusts for income tax purposes. This means that the donor spouse (the grantor) is treated as the owner of the trust for income tax purposes and must report all trust income on their personal income tax return. This is actually a planning advantage: the donor spouse pays the income tax on the trust's income, which effectively makes additional tax-free gifts to the trust (because the trust assets grow without being reduced by income tax payments).

If the donor spouse dies before the beneficiary spouse, the SLAT becomes a non-grantor trust and the trust will be subject to the compressed trust income tax rates (37% rate kicks in at $15,200 of trust income in 2026). Practitioners should plan for this contingency in the trust document.

Divorce and Death of the Beneficiary Spouse

Two significant risks of the SLAT are divorce and the death of the beneficiary spouse. If the couple divorces, the donor spouse loses indirect access to the SLAT assets (because the beneficiary spouse is no longer their spouse). If the beneficiary spouse dies, the donor spouse loses indirect access to the SLAT assets entirely (unless the trust document provides for distributions to the donor spouse after the beneficiary spouse's death, which would cause estate inclusion).

Practitioners should advise clients to consider these risks carefully before funding a SLAT. Some practitioners recommend a smaller initial SLAT funding (e.g., $3–5 million) rather than the full exemption amount, to preserve flexibility in the event of divorce or the beneficiary spouse's death.

Frequently Asked Questions