SLAT: Spousal Lifetime Access Trust

A SLAT spousal lifetime access trust is an irrevocable trust one spouse creates and funds for the benefit of the other spouse, and often the children, so the family removes assets from the taxable estate while the beneficiary spouse can still receive distributions. The point of a SLAT spousal lifetime access trust is to use the federal gift and estate tax exemption now, lock the gifted assets and all their future growth out of both spouses estates, and keep indirect access to the money through the beneficiary spouse. One spouse, the donor, makes a completed gift to the trust. The other spouse, the beneficiary, can receive distributions from the trustee, which is how the donor couple keeps a practical line to the funds without the donor holding any direct right to them.

Here is the mechanic. The donor spouse gifts assets into the SLAT spousal lifetime access trust and files a Form 709 gift tax return to report the gift and apply the lifetime exemption. For 2026 the federal basic exclusion amount is 15 million dollars per person, made permanent by the law signed in July 2025, with inflation adjustments starting in 2027. Because the gift is complete and irrevocable, those assets and their appreciation sit outside the donor gross estate at death. Most planners structure the SLAT as a grantor trust, meaning the donor pays the income tax on the trust earnings personally, which lets the trust assets grow without the drag of trust level tax. The IRS overview of the exemption changes is at What is new estate and gift tax, and the gift return rules are at About Form 709.

Take a worked example. A married couple in their fifties holds 20 million dollars, much of it in appreciating real estate and a private business. One spouse funds a SLAT spousal lifetime access trust with 10 million dollars of that, files Form 709 using 10 million of the 15 million exemption, and names the other spouse and the children as beneficiaries. Over the next 20 years that 10 million grows to 25 million. At the donor death, that full 25 million is outside the estate. At a 40 percent estate tax rate, keeping 25 million out of the estate saves the family roughly 10 million dollars in estate tax, while the beneficiary spouse had access to distributions the whole time.

It helps to be clear about who plays which role, because the structure only works when those roles stay separate. The donor spouse is the person making the gift and giving up ownership, and the donor cannot be a beneficiary of the trust without pulling the assets back into the estate. The beneficiary spouse is the one the trust can distribute to during life, which is how the family keeps indirect access to the money. The trustee, ideally someone other than the donor, controls distributions according to the trust terms. As long as the donor holds no beneficial interest and no improper control, the gift to the SLAT spousal lifetime access trust stays complete and the assets stay out of the donor estate. Blur those roles and the whole estate tax benefit can collapse.

The common mistake we see every year is couples treating a SLAT spousal lifetime access trust like a revocable living trust they can unwind. It is irrevocable. The donor gives up legal ownership for good, and the access runs only through the beneficiary spouse. The edge case to plan for is divorce or the death of the beneficiary spouse, which can cut off the donor indirect access, so the trust terms need to address those events. For the federal gift filing mechanics, see Frequently asked questions on gift taxes. If you are weighing a SLAT spousal lifetime access trust, our tax strategy consulting team models the numbers against your estate before you commit.

In 2026 you can gift up to your full federal basic exclusion amount of 15 million dollars to a SLAT spousal lifetime access trust without paying gift tax, and a married couple using two separate trusts can move up to 30 million dollars combined. The 15 million figure is the lifetime exemption that applies to gifts and estates together, and it was set permanently at that level for 2026 by the law enacted in July 2025, with inflation increases beginning in 2027. Every dollar you gift to a SLAT spousal lifetime access trust during life uses part of that 15 million, and whatever you do not use during life remains available to shelter your estate at death.

The mechanics involve two separate numbers people confuse. The first is the annual gift tax exclusion, which is 19,000 dollars per recipient for 2026. Gifts under that amount do not use any lifetime exemption and usually do not even require a return. The second is the lifetime exemption of 15 million dollars, which is what a large SLAT funding draws on. When you fund a SLAT spousal lifetime access trust with, say, 8 million dollars, you file Form 709 and apply 8 million of your lifetime exemption. You owe no gift tax until you exceed the full 15 million across your lifetime. The IRS lays out the annual and lifetime figures at Frequently asked questions on gift taxes and the return itself at About Form 709.

Here is a worked example for a couple. Spouses each have 15 million of exemption, so 30 million combined. They want to shelter a 24 million dollar estate. Spouse A funds a SLAT spousal lifetime access trust with 12 million for the benefit of Spouse B, and Spouse B funds a separate SLAT with 12 million for the benefit of Spouse A. Each files a Form 709 reporting a 12 million gift against a 15 million exemption. The full 24 million, plus all future growth, leaves both estates. They have used 12 million of each 15 million exemption and kept indirect access through each other.

There is a planning reason couples are funding SLATs now rather than waiting. Although the 15 million dollar exemption was made permanent for 2026, exemption levels are a political variable, and a future Congress could lower them. A completed gift made today locks in the exemption used at today level, and the IRS has confirmed there is no clawback if the exemption later drops, meaning gifts made while the exemption is high are not retroactively taxed if the exemption falls. That is why a SLAT spousal lifetime access trust funded at the current 15 million level captures a benefit that a couple who waits might lose. The decision is less about this year math and more about using a large exemption while it is available. A SLAT spousal lifetime access trust is the common vehicle for putting that benefit to work because it lets the donor make the large gift without fully giving up family access.

The common mistake we see every year is couples assuming they should always gift the maximum. You should not gift more than you can comfortably part with, because a SLAT spousal lifetime access trust is irrevocable and the only access is indirect through the beneficiary spouse. Gift what the family can live without if circumstances change. The edge case is the reciprocal trust doctrine, covered in another answer, which can unravel two SLATs that are too similar. For the exemption changes, see the IRS page at What is new estate and gift tax. To size your SLAT spousal lifetime access trust gift against your actual balance sheet, our tax strategy consulting service runs the projection with you.

The main tax advantage of a SLAT spousal lifetime access trust is that it removes the gifted assets and all of their future appreciation from both spouses estates, which can save 40 percent estate tax on everything that grows inside the trust. On top of that, when the SLAT is structured as a grantor trust, the donor pays the income tax on the trust earnings out of personal funds, which lets the trust compound faster and effectively shifts more wealth to the next generation free of additional gift tax. Those two features, estate freeze and tax burn, are why a SLAT spousal lifetime access trust is a popular tool for families above the exemption.

The mechanics of the estate freeze are simple to state. Whatever you gift to a SLAT spousal lifetime access trust is valued for gift tax purposes on the day you gift it. All growth after that day happens outside your estate. So if you move a 5 million dollar interest that later becomes 15 million, you reported a 5 million gift and the 10 million of growth never touches the estate tax. The grantor trust feature adds a second benefit. Because the donor pays the trust income tax, those tax payments are not treated as additional gifts, so the donor is effectively making extra tax free transfers each year equal to the tax paid. The IRS explains gift reporting at About Form 709 and the exemption framework at What is new estate and gift tax.

Here is a worked example. A founder gifts 6 million dollars of pre IPO stock to a SLAT spousal lifetime access trust and files Form 709 reporting a 6 million gift. The company goes public and the stake is worth 30 million five years later. The 24 million of growth is entirely outside the estate. Meanwhile the trust earned 400,000 dollars of dividends and interest one year. Because it is a grantor trust, the founder pays the roughly 150,000 dollar tax personally, letting the full 400,000 stay and compound in the trust. That 150,000 is, in effect, another tax free transfer to the family.

The grantor trust feature deserves a second look because it does more than shift income tax. When the donor pays the trust income tax personally, the donor estate shrinks by the amount of tax paid each year, which is itself an estate tax benefit on top of letting the trust grow untaxed. Over a long horizon those annual tax payments can move a large amount of value out of the estate without using any additional gift exemption. Some SLATs are drafted so the grantor can turn the grantor trust status off later if paying the tax becomes a burden, which gives the family flexibility as circumstances change. That toggle is a drafting choice your attorney builds in at the start, so it is worth raising before the SLAT spousal lifetime access trust is signed.

The common mistake we see every year is families funding a SLAT spousal lifetime access trust with cash or slow growing assets when the bigger win comes from gifting assets poised to appreciate. Put the high growth assets in the trust so the appreciation escapes the estate. The edge case is loss of basis step up. Assets in a SLAT do not get a step up in basis at death the way assets in your estate would, so for low basis assets you weigh estate tax savings against the capital gains the heirs may face. For the gift tax FAQs, see Frequently asked questions on gift taxes. Our tax strategy consulting team weighs the estate tax savings against the basis tradeoff for your specific assets.

The biggest risks with a SLAT spousal lifetime access trust are losing indirect access if the beneficiary spouse dies or the couple divorces, and triggering the reciprocal trust doctrine if both spouses create SLATs that look too much alike. The reciprocal trust doctrine is the IRS tool for unwinding two trusts that are so similar the IRS treats each spouse as having really created a trust for their own benefit, which pulls the assets right back into each estate and defeats the entire plan. A SLAT spousal lifetime access trust only works if the gift is complete and the donor keeps no retained interest, so anything that looks like the donor benefiting from their own gift is dangerous.

The mechanics of the reciprocal trust doctrine come up when a married couple wants to double up by each funding a SLAT for the other. If Spouse A creates a trust for Spouse B and Spouse B creates a near identical trust for Spouse A at the same time, the IRS can argue the two trusts are interrelated and that, in substance, each spouse created a trust for their own benefit. If that argument succeeds, the trust assets are pulled back into each donor gross estate and the estate tax savings vanish. To avoid it, the two SLATs must be meaningfully different. Different funding dates, different asset types, different trustees, different beneficiary classes, different distribution standards, and different powers of appointment all help break the symmetry. The IRS exemption rules that make this planning attractive are at What is new estate and gift tax.

Here is a worked example. A couple wanted two SLATs to shelter 20 million dollars. Their first draft had both trusts funded the same week, with the same 10 million in marketable securities, the same trustee, and identical terms. We flagged the reciprocal trust risk. The revised plan had Spouse A fund a SLAT in the spring with real estate, naming a corporate trustee and giving Spouse B a limited power of appointment, while Spouse B funded a different SLAT six months later with business interests, naming an individual trustee and using a different distribution standard. The differences gave the structure a defensible position that the two trusts were not mirror images.

Beyond the reciprocal trust doctrine, the other structural risk worth planning around is dependence on the marriage and on the beneficiary spouse staying alive. The donor indirect access runs entirely through the beneficiary spouse, so if that spouse dies first or the couple divorces, the donor practical line to the money can disappear while the assets remain locked in the irrevocable trust. Some couples address this with a floating spouse provision that defines the beneficiary spouse as whoever the donor is currently married to, or with life insurance to replace the lost access. These are drafting decisions made up front, and they are part of why a SLAT spousal lifetime access trust should never be funded with assets the family might actually need to live on.

The common mistake we see every year is couples or their attorneys creating two SLATs that are functionally twins, which hands the IRS the reciprocal trust argument on a plate. Build in real differences from the start. The other risk is over funding, since a SLAT spousal lifetime access trust is irrevocable and access ends if the beneficiary spouse dies or you divorce, so never gift money the family may actually need. The edge case is state law, which can affect creditor protection and whether a trust qualifies for certain self settled protections. For the gift return mechanics behind all of this, see About Form 709 and the gift tax FAQs at Frequently asked questions on gift taxes. Our entity formation and structuring team coordinates with your estate attorney to keep two SLATs from collapsing under the reciprocal trust doctrine.

You set up a SLAT spousal lifetime access trust by having an estate attorney draft the irrevocable trust, funding it with a completed gift, and reporting that gift on a Form 709 gift tax return filed by April 15 of the year after the gift. The setup is part legal drafting and part tax reporting, and both have to be right for the SLAT spousal lifetime access trust to remove the assets from your estate. The trust document defines the trustee, the beneficiary spouse and other beneficiaries, the distribution standards, and the powers of appointment, while the Form 709 is what tells the IRS you used part of your lifetime exemption.

The mechanics run in order. First, the attorney drafts the trust as irrevocable, names a trustee who is not the donor, and sets the terms so the gift is complete and the donor retains no interest. Second, you transfer assets into the trust, which is the actual gift, retitling real estate, moving securities, or assigning business interests. Third, you obtain a valuation, especially for hard to value assets like a closely held business or real estate, because the gift amount drives the exemption used. Fourth, you file Form 709 reporting the gift and applying your lifetime exemption. Form 709 is generally due by April 15 of the year after the gift, the same as your income tax return, and can be extended with your 1040 extension. The IRS describes the return at About Form 709 and the gift rules at Frequently asked questions on gift taxes.

Here is a worked example. A couple decides in March to fund a SLAT spousal lifetime access trust with a 7 million dollar interest in a family business. Their attorney drafts the trust in April, they assign the interest in May, and they hire an appraiser who values the gifted interest at 7 million after applicable discounts. The following April 15, they file a Form 709 reporting the 7 million gift and applying 7 million of the donor 15 million exemption. The valuation report is attached to support the discount. From that point the business interest and its growth are outside the estate.

Coordination between your CPA and your estate attorney is what makes the reporting hold up. The attorney drafts the trust and handles the legal transfer, but the gift only counts for tax purposes when it is reported correctly on Form 709, and the value reported has to match a defensible appraisal. We have seen trusts drafted beautifully but funded with a vague description of the gifted asset and no valuation, which leaves the gift amount open to challenge years later. The fix is simple. Pin down exactly what was transferred, get it appraised, and report it on a timely Form 709 with the appraisal attached so the adequate disclosure clock starts running. A SLAT spousal lifetime access trust is only as strong as the documentation behind the gift.

The common mistake we see every year is skipping or botching the Form 709, or funding the trust without a proper appraisal of a hard to value asset. A missing or weak valuation invites the IRS to challenge the gift amount years later when memories and records have faded. File the return on time with a defensible appraisal. The edge case is the three year adequate disclosure rule. If you report the gift properly on Form 709 with adequate disclosure, the IRS generally has three years to challenge the value, after which it is closed, so good reporting actually shortens your exposure. For the exemption backdrop, see What is new estate and gift tax. Our tax compliance team prepares the Form 709 and coordinates the valuation, and you can begin by reaching us through our new client inquiry page.