Spousal Lifetime Access Trust (SLAT): Locking in Estate Tax Exemption Before 2026 Sunset

The Estate Tax Exemption Cliff

IRC §2010 sets the unified estate and gift tax exemption.

Current and projected:

– 2024: $13.61M per person

– 2025: $13.99M per person

– 2026 (without extension): ~$7M per person (TCJA sunset)

– 2026 (with extension via legislation): could remain at $14M+ level

Sunset mechanics: TCJA doubled the exemption starting 2018. The doubling sunsets after 2025. Without congressional extension, exemption reverts to pre-TCJA level (~$5.5M) plus inflation adjustments since 2017 — approximately $7M.

Married couple combined: 2 × $13.99M = $27.98M in 2025. Drops to ~$14M in 2026.

For wealthy couples with $14M+ of assets: 2025 represents a final opportunity to use the higher exemption before it potentially halves.

Anti-clawback regulations: IRS Final Regulations (Treas. Reg. §20.2010-1(c)) confirmed that gifts using current exemption are NOT clawed back if exemption later decreases. Once you’ve used the $13.99M exemption, it’s used — not subject to retroactive reduction.

Use-it-or-lose-it window: for many couples, the choice is to use the higher exemption now or risk losing access to it after sunset.

Strategic vehicles for using exemption: SLAT, irrevocable trusts, GRATs, charitable trusts, gifts to family. SLAT is particularly popular because it provides ongoing access through spouse beneficiary.

SLAT Mechanics

A SLAT is an irrevocable trust where:

– Grantor (donor spouse) transfers assets into the trust

– Trust is for benefit of beneficiary spouse and descendants

– Grantor uses gift tax exemption to fund the trust

– Beneficiary spouse can receive distributions as needed

– Trust is excluded from grantor’s gross estate (gift is complete)

– Trust is also excluded from beneficiary spouse’s estate (assuming proper structure)

– Distributions to beneficiary spouse may be used for family benefit

Key features:

1. Irrevocable: once funded, grantor can’t change terms or recapture assets.

2. Grantor trust for income tax: typically structured as grantor trust so grantor pays income tax on trust earnings (rather than trust paying at compressed brackets). This ‘tax burn’ further reduces grantor’s estate.

3. Distribution provisions: trustee can distribute income and principal to spouse and descendants. Discretion may be at trustee’s sole discretion, or subject to a standard (health, education, maintenance, support).

4. Termination at spouse’s death: typically the trust continues for descendants or terminates and distributes to remainder beneficiaries.

Indirect access: while the grantor doesn’t directly own trust assets, the beneficiary spouse can receive distributions. Practically, married couple’s standard of living may be maintained through the spouse beneficiary.

Example structure:

Husband (grantor) establishes SLAT in 2025. Funds with $13.99M of stocks and real estate. Uses husband’s full exemption.

Trust beneficiaries: wife (during her lifetime) and children (during her lifetime and after).

Trustee: independent trustee (e.g., institutional trustee or non-related individual). Or family member.

Distribution standard: ‘health, education, maintenance, and support’ (HEMS standard) for wife. Discretionary for children.

Wife can receive distributions for medical care, education for children, household maintenance, etc. The trust funds these from its assets.

After husband’s death: assets in SLAT are NOT in his gross estate (because the gift was complete). Wife continues to receive distributions. After wife’s death: assets pass to children per trust terms.

Net effect: $13.99M of assets removed from husband’s estate (and not added to wife’s estate either). Estate tax savings at potential 2026 rate (40% on amount over reduced exemption): up to $5.6M.

Tax Treatment

Gift tax: grantor reports the SLAT funding on Form 709 (Gift Tax Return) for the year of funding.

Gift amount: fair market value of assets transferred.

Use of exemption: applied against the grantor’s lifetime exemption. For 2025 funding using full $13.99M: entire current exemption used.

If gift exceeds exemption: 40% gift tax due on excess. Avoid by limiting to exemption amount.

Annual exclusion: SLAT funding generally doesn’t qualify for annual exclusion (which requires present interest). The funding is a future-interest gift; uses lifetime exemption, not annual exclusion.

Income tax during trust operation:

Grantor trust status (common): under §675, §677, or §679 — the grantor is treated as owner of trust for income tax purposes. Trust income flows to grantor’s personal return.

Tax burn effect: grantor pays income tax on trust earnings from outside the trust. This further reduces grantor’s estate (without using exemption) and lets the trust assets grow tax-free for beneficiaries.

Non-grantor trust alternative: if grantor trust status not desired, the trust pays tax at compressed trust brackets (37% bracket starts at ~$15,200 in 2026). Beneficiaries report tax on distributions received.

Most SLATs are structured as grantor trusts because the tax burn is beneficial.

Estate tax at grantor’s death: SLAT assets are not in gross estate. The gift was complete and irrevocable.

Estate tax at beneficiary spouse’s death: SLAT assets are not in her gross estate either (if she had limited power; not a general power of appointment).

Generation-skipping transfer (GST) tax: SLAT can be allocated GST exemption for ongoing benefit to grandchildren. This is a major planning point for multigenerational wealth transfer.

Basis: gifts use carryover basis under §1015. SLAT beneficiaries receive grantor’s basis. No step-up at grantor’s death (since not in estate).

Strategic basis: if gifted assets have low basis with significant appreciation, family loses step-up. For high-basis or rapidly-appreciating assets, gift may still be optimal for estate tax savings. For deeply appreciated assets the family will use, retaining for step-up may be preferable.

The Reciprocal Trust Doctrine Trap

If both spouses create SLATs for each other, the IRS may apply the ‘reciprocal trust doctrine’ — treating each spouse as if they created their own trust for themselves, defeating the estate tax purposes.

Result: both trusts would be included in the respective grantor’s estate.

Reciprocal trust analysis (Estate of Grace v. United States, 395 U.S. 316 (1969)):

Two trusts are reciprocal if:

(1) Interrelated — created at same or near same time, with substantially similar terms;

(2) Leave the grantors in approximately the same economic position they would have been in had they created trusts for themselves directly.

If both elements present: the IRS ‘uncrosses’ the trusts. Each grantor is treated as creating his/her own trust.

How to avoid reciprocal trust doctrine:

1. Differ the trusts substantially: – Different trustees – Different distribution standards – Different beneficiaries (or different shares of beneficiaries) – Different funding amounts – Different trust terms (some discretionary, some HEMS) – Different timing (create at different times) – Different asset types funded 2. Different economic positions: – One trust larger than other – Different income distributions – Different rights of withdrawal – Different termination provisions 3. Documentation: – Show genuine differences in planning – Different professional advisors – Separate decision-making process

Conservative approach for couples wanting both spouses to use SLATs:

Time the funding differently: spouse A funds SLAT in 2024; spouse B funds different SLAT in 2026.

Different terms substantially: one SLAT for descendants only; one for spouse + descendants.

Different trustees: independent trustee for one; family member for the other.

Different sizes: $10M in one; $13M in the other.

Different assets: equity investments in one; real estate in the other.

Different distribution standards: HEMS for one; discretionary for the other.

The reciprocal trust analysis is fact-specific. Courts and IRS use facts-and-circumstances; no bright-line rule.

Cases finding NOT reciprocal: trusts with different beneficiaries, different terms, different timing.

Cases finding reciprocal: trusts created same day with mirror-image terms.

For couples both wanting to use SLATs: get experienced estate counsel. The structural differences matter and small errors can result in significant tax exposure.

Asset Protection Benefits

SLAT provides asset protection that direct ownership doesn’t:

1. Creditor protection: SLAT assets are generally protected from creditors of the grantor (after gift completion). Some state law variations apply.

2. Divorce protection: if grantor and beneficiary spouse later divorce, the trust assets are typically protected from divorce settlement (with caveats — see below).

3. Lawsuit protection: protect against potential future lawsuits (medical malpractice, professional liability, etc.) by removing assets from grantor’s reach.

4. Future creditor of trustees/beneficiaries: trust structure provides protection from beneficiary’s individual creditors.

Divorce considerations:

If grantor’s spouse is the trust beneficiary and divorce occurs:

– Trust assets are technically the trust’s, not the spouse beneficiary’s – Beneficiary spouse may still have rights to distributions

But: divorce courts may consider the trust’s value in property settlement. Some jurisdictions allow ‘tracing’ to assets that were transferred to trust before divorce was contemplated.

For SLATs to provide divorce protection:

– Established well before any marital issues – Genuine estate planning purpose – Not used as substitute for marital agreement Reality: SLAT divorce protection is imperfect. Divorce courts have considerable discretion. Best to combine with proper marital planning.

Creditor reach-back: in some states, creditors can challenge transfers made within a ‘reachback period’ (often 4 years) if you knew of pending claims. Be cautious about timing.

Sole proprietor / business owner protection: if you operate a business with personal liability exposure (medical practice, legal practice, etc.), removing personal assets via SLAT shields them from business liability claims.

Estate planning attorneys help structure SLATs for maximum asset protection while preserving family access.

Funding the SLAT

What to fund into a SLAT:

Best candidates:

– Assets with expected appreciation (let growth occur outside estate)

– Real estate (especially appreciated commercial or rental)

– Closely-held business interests (with valuation discounts)

– Highly-appreciated stocks (though loses step-up)

– Life insurance (or ‘second-to-die’ insurance for couples)

Less ideal candidates:

– Cash or money market (limited future appreciation)

– Assets needed for current living expenses – Deeply appreciated assets where step-up at death matters

Valuation discounts: assets transferred into trust with minority interest, lack of marketability, or other restrictions can be valued at discount to FMV.

Examples:

– LLC membership interest with restrictions: 25-35% discount – Closely-held stock: 20-40% discount – Family limited partnership interest: 30-40% discount

Practical effect: $13.99M of exemption can support $18M-$23M of underlying asset transfer using discounts.

Care with discount: the IRS scrutinizes discounts. Conservative valuations more defensible. Aggressive discounts attract audit.

Funding mechanics:

1. Formal valuation: appraisals for complex assets (real estate, business interests) 2. Transfer documents: deeds, stock transfers, assignments 3. Trust documentation: receipt and acknowledgment 4. Gift tax return (Form 709) for year of funding 5. Records of valuation methodology and supporting documentation

Subsequent fundings: SLAT can be funded over multiple years. Each year’s funding uses available exemption (up to remaining lifetime amount).

Once exemption is used, additional funding becomes taxable gifts (40% gift tax).

Beneficiary Spouse's Rights and Access

The ‘spousal access’ in SLAT is the key feature distinguishing it from other irrevocable trusts.

Beneficiary spouse rights:

1. Distribution rights: subject to trustee discretion and any standards in trust.

Typical: HEMS (Health, Education, Maintenance, and Support) standard. Trustee distributes for these purposes at discretion.

Even broader: ‘discretionary’ for any purpose — gives trustee maximum flexibility, but means no enforceable right to distribution.

More restrictive: specific dollar amount per year, or specific purposes only.

2. Income vs. principal: trust may allow income distributions but require corpus to grow. Or distribute both.

3. Trustee selection: independent trustees (institutional or non-family) less likely to face IRS challenges. Family trustees may work but with caveats.

4. Termination provisions: at beneficiary spouse’s death, trust continues for descendants, terminates, or has other provisions.

Limitations to preserve estate tax benefit:

1. Beneficiary spouse should NOT have general power of appointment. Otherwise trust is included in her estate at her death.

2. Beneficiary spouse should NOT be trustee with broad discretionary powers over herself. Otherwise §2041 may include trust in her estate.

3. Distributions to spouse beneficiary should be for HEMS or specific identifiable purposes — not unlimited.

4. Specific powers (5×5 power, withdrawal rights) carefully structured to avoid estate inclusion.

Practical access:

Spouse can receive distributions for legitimate purposes — medical expenses, household maintenance, children’s education, charitable giving (if specified), travel, etc. — at trustee discretion.

The level of access depends on trustee. Independent trustee: distributions only as needed. Family trustee: more accommodating but potentially audit-vulnerable.

Most couples want flexibility for spouse + structure that withstands IRS scrutiny. Independent trustee with HEMS standard balances both.

Timing Considerations for 2025-2026

The 2025 deadline is critical for using current exemption:

Sunset: TCJA exemption increase expires December 31, 2025. Without extension, 2026 exemption drops to ~$7M.

Decision framework for couples:

Couple A: $15M combined assets. Don’t need SLAT urgency — current 2025 exemption per spouse is $13.99M. Even after sunset to $7M per spouse, $14M combined exemption likely covers their estate. Wait and see if extension passes.

Couple B: $25M combined assets. Strong SLAT candidate. After 2026 sunset, $14M exemption × 2 = $14M combined. $11M of assets would face 40% estate tax = $4.4M. Funding SLATs now with current $13.99M exemption removes assets and locks in the higher exemption.

Couple C: $50M combined assets. Major estate planning opportunity. SLATs plus other vehicles (GRATs, charitable trusts, etc.) for comprehensive plan.

Timing of funding:

Best to fund well before December 31, 2025. Year-end rush creates execution risk:

– Valuations not finalized in time – Trust documents not signed – Transfers not properly recorded – Tax return not filed

Recommended: complete SLAT funding by November 2025 at latest, ideally earlier in year.

If extension passes: SLATs may still be valuable, especially if extension is for limited period. Or if it doesn’t pass.

Combination strategies: fund some assets now (locking in current exemption) and hold others (preserving flexibility, potential for step-up).

Don’t wait until December 31:

– Funding takes weeks to months – Appraisals needed for complex assets – Trustee selection and document drafting – Tax counsel review – Year-end backlogs at attorneys, appraisers, trustees

Engage estate planning attorney by mid-2025 to allow proper planning before year-end.

Common SLAT Mistakes

Issues we see in SLAT planning:

1. Reciprocal trust doctrine. Both spouses creating mirror-image SLATs without differentiation. IRS uncrosses; estate inclusion results.

2. Beneficiary spouse as trustee. Beneficiary holding discretionary power over distributions to herself can result in §2041 estate inclusion.

3. Inadequate substantial difference. Trying to do reciprocal SLATs with minor differences. The differentiation must be substantive.

4. Aggressive valuation discounts. Claiming 50%+ discounts on simple LLC interests. IRS challenges; potentially loses the exemption use.

5. Funding cash equivalents. Putting cash into SLAT removes the cash from estate but provides minimal appreciation. Better to fund assets expected to grow.

6. No grantor trust status. Forgetting to make grantor trust election or include grantor trust triggers. Trust pays compressed tax rates; tax burn benefit lost.

7. Failure to file Form 709. Gift tax return required for year of funding. Failure to file: 5% per month penalty (up to 25%) plus interest.

8. Spouse divorces or dies before grantor. SLAT relies on spouse beneficiary’s existence. Plan for contingencies: who’s beneficiary if spouse dies, divorces, remarries?

9. Inadequate funding. Funding SLAT with small amount loses the value of using exemption. If only $1M funded, you’ve used only $1M of $13.99M exemption.

10. State estate tax considerations. NY, NJ, MA, etc. have their own estate tax exemptions (lower than federal). Plan for state estate tax separately.

Professional team:

– Estate planning attorney (essential — never DIY a SLAT) – CPA experienced with gift and estate tax – Investment manager for trust assets – Trustee (institutional, family, or both) – Insurance professional for life insurance funding Cost: SLAT establishment typically $10K-$50K for legal, plus ongoing trustee fees. Worth investment for substantial estates.

Alternative and Complementary Strategies

SLATs are part of a broader estate planning toolkit:

1. Direct gifts: simpler than trust; uses annual exclusion ($17-18K per donee in 2024-2025) without affecting lifetime exemption. Good for smaller transfers.

2. GRAT (Grantor Retained Annuity Trust): grantor receives annuity payments back over a term; remainder to family. See our GRAT guide. Different vehicle for different purposes.

3. ILIT (Irrevocable Life Insurance Trust): owns life insurance outside estate. See our ILIT guide.

4. Dynasty trust: longer-term irrevocable trust skipping multiple generations. See our dynasty trust guide.

5. Charitable trusts: combine estate planning with charitable giving. Charitable Remainder Trust, Charitable Lead Trust.

6. Family Limited Partnership (FLP): for ongoing business operations with discounts.

7. Intentionally Defective Grantor Trust (IDGT): grantor trust status but assets excluded from estate.

Combined strategies: high-net-worth couples often combine multiple vehicles. SLAT + GRAT + ILIT + dynasty trust + charitable giving = comprehensive plan.

Sequencing: each vehicle has specific timing requirements. SLAT funding before 2026 sunset is timing-sensitive. GRAT funding less timing-sensitive but requires specific term durations.

Don’t put all assets in one vehicle. Diversify across structures. Maintain some assets in individual ownership for liquidity and step-up basis benefit.

Step-up vs. estate tax tradeoff:

Holding to step-up: heirs receive stepped-up basis at death. Capital gains tax on appreciation is eliminated. Estate tax may apply on full value.

Gifting before death: avoids estate tax on the gifted asset. But heirs receive carryover basis (no step-up). Future sale realizes the original-to-gift appreciation as capital gain.

Crossover: when estate tax rate exceeds expected capital gains rate, gifting is favorable. When capital gains rate exceeds estate tax exposure, holding is favorable.

For 2025 NYC couple with $30M estate: gift-tax savings (lock in 40% estate tax on $10M+ at risk) far exceeds capital gains tax exposure on carryover basis. SLAT funding makes sense.

For couple with $14M-$15M estate: marginal benefit; analysis required.

Plan with estate counsel and CPA together. The decisions are technical and individual.