South Dakota Spousal Trust Planning Guide

A conventional SLAT and chapter 55-17 trust have different signers, objectives, property rules, and formation requirements.

A conventional SLAT commonly begins with one spouse’s completed transfer to an irrevocable trust in which the other spouse is eligible for discretionary benefits. The design may remove appreciation from the donor’s estate while maintaining indirect household access. No South Dakota statute makes that result follow automatically from the acronym.

Under chapter 55-17, both spouses sign, at least one trustee meets §§ 55-3-39 and 55-3-41, and the instrument begins with the prescribed warning. The trust can be revocable or irrevocable and can classify transferred property as community property, with equal ownership as the default unless the instrument provides otherwise.

Execution and disclosure also affect enforceability. Under § 55-17-14, a spouse may challenge the trust based on unconscionability when signed, involuntary execution, or inadequate financial disclosure when the statute’s waiver-and-knowledge conditions are also absent. Each spouse should understand the property and obligations involved before signing.

See SDCL §§ 55-17-1 through 55-17-4. “SLAT” is conventional planning terminology, not the statutory name of chapter 55-17.

Potential distributions to one spouse are not retained ownership by the donor and should not be treated as guaranteed cash flow.

Access depends on the continued marriage, beneficiary status, distribution language, trustee discretion, withdrawal rights, and actual resources. A private understanding that the beneficiary will return trust money to the donor can contradict an irrevocable gift and create fiduciary, tax, and creditor problems.

Prepare a retained-resource budget covering housing, insurance, taxes, education, emergencies, and long periods without distributions. Model divorce, both forms of incapacity, either spouse’s death, remarriage, and a trustee’s refusal. Reduce the contribution or change the design if an ordinary scenario makes the household insolvent.

Complete the household liquidity and retained-resource analysis before signing transfer documents.

Completed gifts, estate inclusion, appointment powers, grantor ownership, and GST allocation are distinct questions.

Retained control or enjoyment can trigger 26 U.S.C. §§ 2036 or 2038. A general appointment power may implicate §§ 2041 and 2514, while §§ 671 through 679 determine grantor-trust reporting. South Dakota governing law does not resolve any of those federal tests.

If later generations can benefit, analyze exemption allocation and inclusion ratio under federal chapter 13. Preserve the transferor, appraisal, value, gift-tax return treatment, exemption allocation, powers, and date for each contribution. Durable documents should not hard-code a temporary exemption amount.

Federal review may include 26 U.S.C. §§ 671–679, 2036, 2038, 2041, 2514, and chapter 13.

Two spouse-created trusts should reflect independent objectives rather than an exchange that recreates each settlor’s original position.

The reciprocal-trust doctrine comes from federal case law and has no South Dakota numerical safe harbor. If both spouses settle trusts, compare beneficiaries, trustees, standards, timing, funding, reserved powers, and economic outcomes, and memorialize the distinct reasons for each plan.

The differences must exist in administration as well as drafting. A nominal variation ignored by the family is weak evidence. Separate counsel or tax advice can be appropriate where contribution values or spouse interests materially diverge.

A current federal case-law review is required for paired trusts; elapsed days alone do not solve reciprocal-trust risk.

South Dakota’s community-property declaration matters, but federal basis treatment and creditor qualification remain separate.

Section 55-17-5 states that a South Dakota special spousal trust is established under the state’s community-property laws for the purpose identified in 26 U.S.C. § 1014(b)(6), and defines special spousal property as community property. South Dakota updated the section’s wording and federal reference date in 2026. Federal law still controls basis, so ownership, domicile, inclusion, property type, and compliance require a federal analysis rather than a promised “double step-up.”

Chapter 55-17 also governs records, agreements between spouses, child-support limits, and creditor issues. Section 55-17-6 allows simultaneous chapter 55-16 qualification only where all separate qualified-disposition requirements are met. Compliance with one chapter never substitutes for the other.

Review SDCL §§ 55-17-5 through 55-17-11 together with 26 U.S.C. § 1014(b)(6).

Define the result when the marriage, domicile, fiduciary lineup, or expected path to indirect access changes.

Define spouse, separation, divorce, remarriage, death, incapacity, removal, and fiduciary succession. Coordinate the trust with wills, marital agreements, powers of attorney, beneficiary contracts, entity governance, and insurance. Section 55-17-7 generally treats property passing to the trust at death by beneficiary designation or another nonprobate transfer as the survivor’s property rather than special spousal property. Obtain family-law review of property classification and enforceability.

Administration should retain transfer documents, consents, valuations, returns, payment decisions, and separate or community property schedules. Revisit the design after a move, marital event, substantial distribution, new contribution, tax-law change, or loss of a fiduciary.

• Donor-spouse death or incapacity
• Beneficiary-spouse death or incapacity
• Separation, divorce, or remarriage
• Change to or from a community-property domicile