South Dakota Special Spousal Trust: Formation and Basis Rules

A South Dakota special spousal trust is the statutory arrangement created by SDCL chapter 55-17. It should not be confused with a spousal lifetime access trust, commonly called a SLAT. A typical SLAT is an irrevocable gift trust established by one spouse for the other; the chapter 55-17 structure is executed by both spouses and can classify scheduled property under South Dakota’s community-property framework.

That difference changes execution, ownership, control, creditor analysis, and the possible federal basis objective. The statutory label alone guarantees no federal tax result.

Satisfy the chapter 55-17 entry requirements

Section 55-17-1 requires both spouses to execute the instrument and requires at least one trustee who is a qualified person under § 55-3-41. The arrangement may be revocable or irrevocable. State that choice directly because it affects retained authority, amendment, creditor access, gifts, estate inclusion, and operation.

Section 55-17-2 calls for a conspicuous warning in capital letters. Use the current codified wording. A generic joint or marital trust that lacks both signatures, the statutory warning, or the qualified trustee should not be marketed as a South Dakota special spousal trust.

The document should identify the spouses, trustee succession, governing law, amendment and revocation mechanics, withdrawal rights, scheduled property, ownership shares, incapacity process, distributions, records, divorce, death, and termination. Coordinate the design with wills, powers of attorney, beneficiary forms, marital agreements, and property-transfer documents.

Schedule property with ownership evidence

Under § 55-17-3, spouses may classify property transferred to the trust as community property. Unless the instrument provides another allocation, the statute treats them as holding equal undivided interests. A schedule saying only “all property” does not establish a useful record.

For each asset, capture its title, acquisition source, prior character, current value, tax basis, debt, contribution date, transfer method, and agreed percentage. Analyze inherited, gifted, separate, jointly titled, marital, entity, and real property under the domicile law that applied before the transfer.

The South Dakota classification can intersect with another state’s divorce, elective-share, support, homestead, and creditor rules. Each spouse should receive a clear explanation of the property rights created, surrendered, or retained. Unequal contributions or adverse interests can warrant separate counsel or documented independent advice.

Keep the federal basis conclusion separate

SDCL § 55-17-5 declares qualifying property to be community property for purposes of 26 U.S.C. § 1014(b)(6). South Dakota amended that provision through 2026 Session Laws chapter 198, effective July 1, 2026. The declaration matters to the state-law design, but federal law determines federal basis.

Section 1014(b)(6) concerns community property held by a decedent and surviving spouse when at least half is included in the deceased spouse’s gross estate. The ultimate federal treatment can turn on ownership validity, domicile, inclusion, property type, trust compliance, and the facts at death.

Do not promise a “double step-up.” Obtain current federal tax advice and keep acquisition dates, original basis, improvements, depreciation, entity basis, debt, and ownership records. At the first death, secure appropriate values and memorialize the federal return position. Basis affects later gain; it is not a cash benefit and does not eliminate depreciation recapture or other asset-specific tax rules.

Make revocability an intentional design decision

A revocable chapter 55-17 trust can support ownership coordination, incapacity management, funded probate planning, and statutory property classification while the spouses retain stated powers. Those retained powers generally mean the arrangement is not lifetime creditor protection against their own valid obligations.

Irrevocability changes the analysis. Specify which spouse can receive income or principal, exercise a power of appointment, remove a trustee, terminate, amend, or withdraw property. Review possible gifts, access constraints, creditor effects, and federal retained-interest and power provisions, including 26 U.S.C. §§ 2036, 2038, 2041, and 2514.

The word “irrevocable” is not an asset-protection plan. Before a permanent transfer, the spouses need adequate retained resources, documented objectives, and a review of existing debts and claims.

Do not merge the chapter 55-17 and 55-16 tests

Section 55-17-6 allows a special spousal trust also to qualify under chapter 55-16 if the qualified-disposition requirements are independently satisfied. Chapter 55-17 formation does not automatically create chapter 55-16 protection.

A qualified-disposition review should test South Dakota governing law, irrevocability, spendthrift language, qualified-person participation, permitted retained powers, completed transfers, creditor limitation periods, family-law exclusions, solvency, and federal bankruptcy exposure. Identify which spouse transferred each asset and preserve the disposition date and evidence.

Section 55-17-11 addresses creditor rights and good-faith transfers in the special-spousal context. It must be read with chapter 55-16, voidable-transfer law, liens, support rights, federal law, the law where property sits, and another state’s public policy. No provision should be summarized as protection from every claimant.

Write the marital-property governance rules

Section 55-17-9 permits agreement on ownership rights, management, control, disposition, and governing law for trust property. Translate that authority into operating provisions: who can sell, pledge, vote, invest, withdraw, lease, or distribute each asset, which decisions require joint consent, and what happens if a spouse lacks capacity.

Chapter 55-17 cannot be used to impair child-support rights under § 55-17-10. Other divorce, support, and property-division questions require family-law analysis. An existing judgment or obligation is not erased by a trust clause.

Define separation, divorce, reconciliation, remarriage, and death consequences. State what “spouse” means and how the trust divides, continues, or ends. Compare those provisions with premarital and postmarital agreements before execution.

Build the property-tracing system at funding

Section 55-17-8 requires records sufficient to identify property and character. Maintain a ledger with contributing spouse, contribution date, ownership fraction, title document, value, basis, liabilities, income, capital additions, sale, replacement property, and distributions.

Keep trust and personal accounts separate. For land, retain deeds, certificates, title reports, lender approvals, insurance, transfer-fee analysis, and appraisals. For companies, preserve assignments, consents, ownership ledgers, tax elections, capital accounts, and valuations.

When property is exchanged or sold, determine and record whether proceeds and replacements carry the intended classification. A successor trustee or return preparer should be able to trace the chain without relying on a spouse’s recollection.

Assign every fiduciary function

The authority model should fit the holdings. A chapter 55-1B directed structure may allocate investment, distribution, family, and tax decisions while an administrative trustee maintains records and executes authorized instructions.

Identify responsibility for valuations, tax elections, distributions between spouses, entity votes, real-estate management, basis files, and the post-death division. If a spouse is simultaneously trustee, adviser, beneficiary, or removal-power holder, establish conflict and substitute-decision procedures.

Use written directions. Initial joint consent does not establish who can act alone after incapacity, separation, or death.

Prepare now for the first death

The first-death protocol should determine gross-estate inclusion, the survivor’s ownership, trust division, ongoing shares, debt and tax payment, liquidity, and any change to the survivor’s amendment or withdrawal powers. Coordinate homestead, elective share, beneficiary contracts, business succession, and other estate property.

Obtain date-of-death valuations and evaluate whether a federal estate-tax return, election, or basis record is appropriate even when no immediate tax is expected. Begin irrevocable-trust notices and administration under the instrument and §§ 55-2-13 and 55-2-14 as applicable.

Update deeds, accounts, entity books, tax identification, insurance, beneficiary forms, and basis schedules. Store the federal § 1014 analysis with the permanent record.

Before funding, confirm both signatures, the current warning, a qualified trustee, explicit revocability, an asset-by-asset schedule, ownership fractions, domicile and family-law analysis, separate federal basis support, an independent chapter 55-16 review if claimed, traceable records, completed external transfers, and workable incapacity, divorce, death, and succession terms.

Chapter 55-17 supplies a distinctive South Dakota state-law framework. Whether it fits depends on the spouses’ domicile, property history, contribution proportions, estate inclusion, and federal objective—not the appeal of the label.