Spousal Lifetime Access Trusts: How Married Couples Shelter Wealth Without Fully Giving It Up

Picture a married couple in their 60s. They have a paid-off house, a brokerage account that keeps compounding, and a nagging sense that their estate could someday exceed the federal estate tax exemption. They’d like to use that exemption now. They aren’t ready to hand millions to their adult kids outright.

A spousal lifetime access trust, or SLAT, fits that situation. One spouse makes a permanent gift into a trust for the other spouse (and often the children), so the assets and their future growth sit outside both spouses’ taxable estates. The beneficiary spouse can still receive distributions. That lets the couple keep indirect access to the money. Most of the risk comes from that same access.

Some scale: estates of people who die in 2026 have a basic exclusion amount of $15,000,000, and the 2026 annual gift exclusion holds at $19,000 per recipient. Of the 7,195 estate tax returns filed in 2024, only 2,663 owed net estate tax, and those estates paid $23,313,220,000 in total.

How a SLAT Pulls Assets Out of Both Spouses’ Estates

A SLAT is an irrevocable trust, meaning that once it’s signed and funded, the donor can’t undo it or take the assets back, and the donor spouse funds it with separate property, meaning assets owned by that spouse alone rather than together.

That gift uses up part of the donor’s lifetime exemption, the total a person can give away during life or at death before federal gift or estate tax applies. Gifts between spouses are normally protected by the unlimited marital deduction. A SLAT is usually drafted so it doesn’t qualify for that deduction, because the whole point is to use up exemption and lock the growth outside the estate.

For income tax, the trust is typically set up as a grantor trust. The tax code treats the grantor as the owner of any trust whose income may be “distributed to the grantor or the grantor’s spouse” under 26 U.S.C. § 677(a)(1). As IRS Publication 525 puts it, “Income earned by a grantor trust is taxable to the grantor, not the beneficiary.” So the donor spouse pays the trust’s tax bill out of other money. Each payment reduces the taxable estate a little more while the trust compounds untouched.

Your Access Runs Through Your Spouse, Never Directly to You

The donor can’t be a beneficiary. Under 26 U.S.C. § 2036(a), the gross estate includes transferred property if the decedent kept “the possession or enjoyment of, or the right to the income from, the property.”

Distributions go to the beneficiary spouse, usually at a trustee’s discretion or limited to health, education, maintenance and support. When that money pays household bills, the donor benefits indirectly. If the donor treats the trust like a personal checking account, the IRS has grounds to argue the gift never really happened.

Five Ways a SLAT Can Backfire on a Married Couple

• Divorce. The trust can’t be undone, so an ex-spouse may stay a beneficiary. Depending on the drafting, the donor could keep paying tax on income that now benefits a former spouse.
• Death of the beneficiary spouse. The donor’s side door closes, and the assets pass to the remainder beneficiaries, usually the kids.
• Reciprocal trust doctrine. If each spouse creates a mirror-image SLAT for the other, courts can “uncross” the trusts and treat each spouse as having funded a trust for themselves. That pulls both back into the estates. Different terms, timing, assets and trustees help defend against it.
• Community property. In community property states, each spouse generally owns half of what’s acquired during marriage. Funding a SLAT with community assets can mean the beneficiary spouse funded part of their own trust, which causes estate inclusion. Couples often convert assets to separate property first.
• Lost step-up in basis. Inherited assets get a cost basis reset to “the fair market value of the property at the date of the decedent’s death” under § 1014(a)(1). Gifted assets keep the donor’s original basis under § 1015(b), so heirs may owe capital gains tax that inheriting would have eliminated. Some SLATs let the donor swap low-basis assets back out for cash to ease this.

Who Actually Uses SLATs and Why Growth Assets Matter

SLATs mainly serve couples whose estates could exceed the exemption. That wealth is concentrated: the top 1% held 32.5% of U.S. household net worth in the second quarter of 2026, per Federal Reserve distribution data. Those households owned 50.9% of all corporate equities and mutual fund shares and 53% of private businesses.

That mix matters, because a SLAT works best with assets expected to grow. Business owners and concentrated investors move shares in early, and the gift counts against the exemption at its value on that day. Later appreciation builds outside the estate. On the estate tax returns that owed tax in 2024, publicly traded stock was the largest asset category, at $42,836,016,000.

Some states levy their own estate taxes, so a couple well under the federal line can still face a state bill.

A SLAT can protected decades of growth while keeping a spouse within reach of the money, but it’s permanent, and small drafting choices decide whether it holds up. Work with an experienced estate attorney. They can plan for divorce, a spouse’s early death, state property rules and the basis tradeoff before you fund anything (we put the broader estate checklist, beneficiary forms and titling included, in a free report here). A CPA should run the income tax side alongside them.

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