Life Insurance in an Irrevocable Trust (ILIT vs Spousal Lifetime Access Trust): 2026 Comparison

The Estate-Tax Problem with Life Insurance

IRC §2042 includes life insurance proceeds in the insured's gross estate if (a) the proceeds are payable to or for the benefit of the insured's estate, or (b) the insured held any "incidents of ownership" in the policy at death. Incidents of ownership include the right to change the beneficiary, surrender the policy, borrow against the cash value, or pledge the policy. Most individually-owned life insurance falls under §2042 because the insured typically holds these rights as the policy owner.

For an estate above the federal exemption ($15M for 2026 under OBBBA), the inclusion of life insurance proceeds in the gross estate triggers 40% federal estate tax on the proceeds. A $5,000,000 policy on the life of a person with a $20,000,000 estate adds $5M to the gross estate; the 40% federal tax on this portion is $2,000,000, paid out of the death benefit itself, leaving only $3,000,000 for the family.

Life insurance trust planning removes the policy from the insured's gross estate by transferring ownership to an irrevocable trust where the insured has no incidents of ownership. The two principal structures are the ILIT (no grantor or spouse beneficiary) and the SLAT (spouse beneficiary), each with distinct features and trade-offs.

The ILIT Structure

An ILIT is an irrevocable trust specifically designed to own life insurance. The grantor (the insured) is not a beneficiary; the trust beneficiaries are typically the grantor's children, grandchildren, or other descendants. The trustee (often a family member, attorney, or trust company) holds all incidents of ownership in the policy.

For the ILIT to work, the insured must hold no incidents of ownership in the policy. The trustee applies for the policy directly (the trust is the original owner and beneficiary), the trustee pays the premiums (typically funded by Crummey-letter gifts from the grantor), and the trustee receives the death benefit at the insured's death.

See our ILIT page for the full ILIT framework including Crummey letter mechanics, the 3-year look-back under IRC §2035, survivorship policy planning, and GST exemption allocation.

The SLAT Structure

A Spousal Lifetime Access Trust (SLAT) is an irrevocable trust funded by one spouse (the grantor) for the benefit of the other spouse (and typically descendants as remainder beneficiaries). The grantor uses lifetime gift exemption to fund the trust ($15M for 2026 under OBBBA). The trust is irrevocable; the grantor has no direct beneficial interest.

The key SLAT feature is that the non-grantor spouse is a permissible beneficiary during life. The trustee can make distributions to the spouse for health, education, maintenance, and support (HEMS standard) or for broader discretionary purposes. The spouse's access provides indirect access for the grantor as long as the marriage is intact: trust distributions to the spouse can be used to maintain the marital household, fund family expenses, etc.

A SLAT can hold any asset, including life insurance on the grantor's life. If structured properly, the life insurance proceeds at the grantor's death are excluded from the grantor's gross estate under §2042 (the SLAT trustee holds incidents of ownership, not the grantor). The proceeds pass to the spouse (or to remainder beneficiaries after the spouse's death) outside the gross estate.

SLAT Divorce Risk

The principal risk in SLAT planning is divorce. After divorce, the former spouse retains beneficial interest in the SLAT (unless the trust specifically terminates the interest). The former spouse's beneficial interest continues, including the right to receive distributions, defeating the indirect-access feature the grantor relied on.

Modern SLATs typically address this risk with a "floating spouse" provision defining the beneficiary spouse as "the person to whom the grantor is married from time to time." Under this provision, divorce automatically terminates the former spouse's beneficial interest. The grantor can then remarry and the new spouse becomes the SLAT beneficiary (assuming the trust terms permit).

The floating spouse provision is not bulletproof. Aggressive divorce counsel may argue that the floating provision violates the grantor's marital obligations or public policy. Most modern SLATs include the floating spouse provision but also include backup provisions (e.g., the former spouse's interest converts to a non-beneficiary interest, or the trust becomes a discretionary trust for descendants only, depending on the trust terms).

The Reciprocal Trust Doctrine

If both spouses fund SLATs for each other with similar terms, the IRS may apply the reciprocal trust doctrine from US v. Estate of Grace, 395 U.S. 316 (1969). The reciprocal trust doctrine treats interrelated trusts as if each grantor had funded a trust for their own benefit, pulling the trust assets back into each grantor's gross estate.

The doctrine applies if (a) the trusts are interrelated (each spouse's trust funded for the other), and (b) the trusts place the grantors in approximately the same economic position they would have been in had each created a trust for themselves directly. The IRS has applied the doctrine aggressively to SLAT reciprocity.

Avoiding the reciprocal trust doctrine requires meaningful differences between the trusts: different funding timing (years apart), different funding amounts, different beneficiaries (e.g., one trust for descendants, another for descendants plus a charity), different distribution standards, different trust terms (one revocable upon a specific event, one not), different trustees. The more differences, the lower the reciprocal risk. The analysis is fact-specific and uncertain.

Most practitioners recommend avoiding reciprocal SLATs entirely. If both spouses want trusts for each other, the structure is typically (a) one SLAT funded by one spouse, with the other spouse's planning addressed through a different structure (a credit-shelter trust funded at death, an ILIT, a GRAT, etc.).

The Choice: ILIT vs SLAT for Life Insurance

Choose ILIT when: the grantor has substantial outside assets and does not need indirect access through the spouse; the planning is purely for estate-tax exclusion of life insurance death benefits; simplicity and minimal divorce risk are priorities; the family is established and the spouse's beneficial interest is not needed.

Choose SLAT when: the grantor wants indirect access through the spouse during life (younger grantors, smaller estates relative to net worth, less certainty about future financial needs); the family may need to access trust funds before the grantor's death; the spouse is in a stable marriage and the divorce risk is acceptable; the grantor wants to combine life insurance planning with use of lifetime gift exemption for marketable securities or business interests.

For very large estates (well above the federal exemption), many families use both: a SLAT funded with substantial assets to use lifetime exemption and provide spousal access, plus a separate ILIT holding life insurance specifically for the estate-tax-exclusion purpose. The combined structure provides both access and estate-tax efficiency.

Frequently Asked Questions

Related Topics