Spousal Lifetime Access Trusts (SLATs): Structure, Strategy, and Considerations

By Andrew Bellm

A Spousal Lifetime Access Trust (SLAT) is a sophisticated estate planning tool that allows an individual (the “donor spouse”) to transfer assets out of their taxable estate for the benefit of their spouse (the “beneficiary spouse”), while maintaining indirect access to the assets through that spouse. SLATs have gained popularity, particularly when planners were planning for reduced federal estate and gift tax exemption amounts, as they allow high-net-worth individuals to utilize current exemption levels.

What Is a SLAT?

A SLAT is an irrevocable trust created by one spouse for the benefit of the other spouse (and potentially other beneficiaries, such as children or grandchildren). Once funded, the assets are removed from the donor spouse’s taxable estate, and future appreciation on those assets is likewise excluded.

Although the donor spouse relinquishes direct control over the trust assets, the beneficiary spouse can receive distributions, which in turn can be used to benefit the couple indirectly — hence, “lifetime access.”

How SLATs Work

  1. Creation and Funding: The donor spouse establishes an irrevocable trust for the benefit of the beneficiary spouse. The trust may also include children or other descendants as secondary beneficiaries. The trust is funded using assets such as cash, securities, or business interests. The gift utilizes the donor’s lifetime gift tax exemption (currently $15.00 million per person in 2026, indexed for inflation).
  2. Trust Terms: The trustee (which should not be the donor spouse) has discretion to make distributions to the beneficiary spouse. Additionally, careful consideration should be taken if the donor wishes to appoint the beneficiary spouse as trustee. The trust typically includes a spendthrift clause and generation-skipping transfer (GST) tax planning provisions.
  3. Tax Treatment: The donor spouse typically pays income taxes on trust income because the SLAT is usually a “grantor trust” for income tax purposes. This allows further tax-free depletion of the donor’s estate.
  4. Termination: The trust can be structured to last for the lifetime of the beneficiary spouse or terminate at a specified time or event.

Benefits of SLATs

  1. Estate Tax Reduction: Assets transferred to the SLAT are removed from the donor’s taxable estate, which can reduce estate taxes at death.
  2. Asset Protection: Assets in the SLAT are typically shielded from creditors of both the donor and the beneficiary spouse.
  3. Indirect Access to Funds: If needed, the beneficiary spouse can receive distributions from the trust, offering indirect financial security to the donor spouse.
  4. Flexibility in Planning for Future Generations: SLATs can incorporate GST planning, enabling tax-advantaged transfers to grandchildren and future generations.

Downsides and Risks of SLATs

  1. Loss of Control: The donor spouse cannot directly access or control trust assets once transferred. The donor must rely on the beneficiary spouse for access to funds.
  2. Divorce or Death of Beneficiary Spouse: Before establishing a SLAT, a donor should consider the strength of the donor’s marriage. If the couple divorces or the beneficiary spouse dies, the donor loses indirect access to trust assets. Additionally, in a divorce, the donor may in certain circumstances be stuck paying the income tax on trust income due to the grantor trust rules.
  3. Reciprocal Trust Doctrine Risk: If both spouses create SLATs for each other with substantially similar terms, the IRS may “uncross” the trusts under the reciprocal trust doctrine, rendering both trusts includible in the respective donor’s estate. This risk can be mitigated by creating the trusts at different times, using different terms, trustees, and beneficiaries.
  4. Irrevocability: Once a SLAT is established and funded, it generally cannot be altered. Mistakes in drafting or changes in circumstances may not be easily corrected.
  5. Administrative Complexity: SLATs require careful drafting, compliance with tax rules, and ongoing administration. Trust formalities must be observed to avoid estate inclusion or gift tax consequences.

Conclusion

SLATs can be powerful estate planning vehicles for married couples seeking to reduce estate taxes and protect assets. However, SLATs are not one-size-fits-all solutions. The potential benefits must be weighed carefully against the irrevocability of the trust, the risk of loss of access, and the possibility of unintended tax consequences. Thoughtful structuring — including attention to timing, trust provisions, and trustee selection — is critical. Advisors should evaluate each client’s family dynamics, financial needs, and long-term goals before recommending a SLAT as part of an overall estate plan. With proper implementation, SLATs can preserve wealth across generations while offering flexibility and security to the donor’s family.