South Dakota Estate Planning Basics

South Dakota estate planning comes down to four documents. A will says who inherits and who raises your children. A durable power of attorney covers your money while you are alive but unable to act. A health care power of attorney, often paired with a living will declaration, covers your medical care in the same situation. A trust is optional and sits on top of the other three.

South Dakota breaks from the pattern most national articles describe in three places that change how you sign. A financial power of attorney is not durable unless it says so, and it must be notarized. A trust is irrevocable unless it says otherwise. And the state offers a transfer on death deed for land plus, since July 1, 2025, a transfer on death title for vehicles and boats.

This guide is the map. Each section states the South Dakota signing rule, cites the section of the South Dakota Codified Laws (SDCL) that sets it, and points at the deeper guide.

The Four Documents At A Glance

Document	What it controls	When it works	South Dakota signing rule
Will	Who inherits probate property, who serves as personal representative, who you nominate as guardian for minor children	After death	Writing, your signature, and two or more witnesses who sign in your conscious presence (29A-2-502(b)), or a handwritten will (29A-2-502(a))
Durable power of attorney	Money, accounts, real estate, bills	While you are alive	Must contain durability words (59-12-3) and a notarized signature (59-12-4)
Health care power of attorney and living will	Medical decisions, life-sustaining treatment, artificial nutrition and hydration	While you are alive	Two adult witnesses or a notary (59-7-2.1, 34-12D-2)
Revocable living trust	Only the assets you retitle into it	While alive and after death	Irrevocable unless the terms expressly reserve the power to revoke or modify (55-3-6)

1. A South Dakota Will

Who can sign one. SDCL 29A-2-501 lets an individual 18 or older who is of sound mind make a will.

How you sign it. SDCL 29A-2-502(b) asks for three things. The will is in writing. You sign it, or someone else signs your name in your conscious presence and by your direction. Then two or more individuals sign in your conscious presence, each having witnessed, in your conscious presence, either your signing or your acknowledgment of the signature. The section names no notary. SDCL 29A-2-505 lets anyone generally competent to be a witness serve, and a signature by an interested witness does not invalidate the will or any gift in it.

Handwritten wills count. Under SDCL 29A-2-502(a), a will is valid as a holographic will, whether or not witnessed, if the signature and material portions are in your handwriting.

A court can save a flawed signing. SDCL 29A-2-503 treats a document as properly signed if the person offering it proves by clear and convincing evidence that you intended it as your will. Do not plan around that rule. It invites a court fight your family pays for.

Make it self-proved. SDCL 29A-2-504 lets you and your witnesses sign sworn statements before an officer authorized to administer oaths, at signing or later. That spares your family from tracking the witnesses down after your death.

Store it with the court if you like. SDCL 29A-2-515 lets you or your agent deposit a will with any court for safekeeping. The court keeps it sealed and confidential, releases it during your lifetime only to you or someone you authorize in a signed writing, and after your death delivers it to the person you designated.

Divorce rewrites it for you. Under SDCL 29A-2-804, a divorce or annulment revokes revocable gifts to the former spouse and the former spouse's relatives, and any nomination of them as personal representative, trustee, conservator, agent, or guardian, unless the document, a court order, or a property settlement says otherwise.

The full picture, including witness mechanics and how a South Dakota court proves a will, is in what makes a South Dakota will valid.

2. A Durable Power Of Attorney

This document names an agent to handle money and property while you are alive. South Dakota adopted the Uniform Power of Attorney Act in 2020 at SDCL chapter 59-12, and two of its rules change how you sign.

It must say it is durable. Under SDCL 59-12-3, the agent's authority survives your later disability only if the document contains words such as "This power of attorney shall not be affected by disability of the principal," or "This power of attorney shall become effective upon the disability of the principal," or similar words showing that intent. Without them, SDCL 59-12-9(1)(b) ends the power when you become incapacitated.

The notary is mandatory. SDCL 59-12-4 says your signature, or the signature of someone you direct to sign in your conscious presence, "shall be acknowledged before a notary public or other individual authorized by law to take acknowledgments."

A conservator ends it. Under SDCL 59-12-7(2), if a court later appoints a conservator or other fiduciary over your property, the power of attorney terminates and the agent turns the property over, unless the court orders otherwise. Subsection (1) lets you nominate a conservator or guardian in the document, and the court appoints your most recent nominee except for good cause or disqualification.

It ends at death. SDCL 59-12-9(1)(a) ends a power of attorney when the principal dies. From then on, a personal representative appointed in the probate case handles the estate. Subsection (2)(c) also ends a spouse agent's authority when an action is filed for divorce, annulment, legal separation, or a protection order, unless the document says otherwise.

SDCL 59-12-41 prints a statutory form with initial boxes for each subject and a Special Instructions box that carries the durability wording. The form states that it "does not authorize the agent to make health-care decisions for you." See a durable power of attorney for the powers that need an express grant.

3. A Health Care Power Of Attorney And A Living Will

Medical decisions sit outside chapter 59-12. SDCL 59-12-2(2) excludes "a power to make health care decisions" from the chapter, so the durability wording and the mandatory notary above do not govern the health care documents. South Dakota uses two instruments, and many people sign both.

The health care power of attorney. SDCL 59-7-2.1 lets you name any other person as your agent for health care decisions, with authority to make any health care decision while you lack capacity. You sign it, or someone signs in your conscious presence at your direction, and the signature is "witnessed by two other adult individuals or by a notary public." If a court later appoints a guardian of your person, SDCL 59-7-11 ends the power of attorney, and the guardian must follow the wishes it states for medical and end-of-life care.

The living will declaration. Under SDCL 34-12D-2, a competent adult may sign a declaration governing the withholding or withdrawal of life-sustaining treatment. It must be witnessed by two adults or by a notary public. It must also state your preference on artificial nutrition and hydration. Leave that choice out and the declaration does not decide it: the laws that apply without a declaration do.

A MOST form is a medical order, not a substitute. SDCL 34-12H-2 lets a patient with decision-making capacity, or the patient's authorized representative, execute a MOST (medical orders for scope of treatment). It is written with a clinician, usually near the end of life.

If you sign nothing. SDCL 34-12C-3 sets who decides when you have no health care agent and no guardian: your spouse if not legally separated, then an adult child, a parent, an adult sibling, a grandparent or adult grandchild, an adult aunt, uncle, cousin, niece or nephew, and last a close friend. You can disqualify a family member in a signed document or by a notation in your medical record made at your direction. The list picks a person by category. It does not know what you would have wanted.

The health care power of attorney and living will guide covers the forms and where to keep them.

4. A Trust, When It Earns Its Place

A trust is an add-on, not a replacement. South Dakota has not adopted the Uniform Trust Code. Its trust law sits in SDCL Title 55, and one default there runs the opposite way from what most living-trust articles assume.

Write in the power to revoke. SDCL 55-3-6 says: "Unless the terms of a trust expressly reserve a power to the settlor to revoke or modify a trust, a trust shall be irrevocable." A trust form written for another state that stays silent on revocation locks you out of your own assets here. State plainly that you may revoke or amend it, and how.

The pour-over will. SDCL 29A-2-511 lets your will add property to a trust, even one you can amend or revoke. Under subsection (c), revoking the trust before death causes that gift to lapse unless the will provides otherwise.

A trust does not hide assets from creditors. Under SDCL 55-4-58(a), the property of a trust that was revocable at your death answers for your creditors' claims, estate administration costs, funeral expenses, and statutory allowances to a surviving spouse and children, to the extent the probate estate cannot cover them.

A trust also controls only what you retitle into it. Read whether you need a South Dakota trust for the funding steps. For a pet, SDCL 55-1-21 makes a trust for the care of a designated animal valid; see providing for a pet.

Naming A Guardian For Minor Children

SDCL 29A-5-202 lets a parent of an unmarried minor nominate a guardian or conservator for the child "by will or other signed writing." If both parents are dead, the court may appoint the parental nominee who is eligible and would serve the child's best interests. If both parents named someone, the court picks the nominee it finds best qualified.

Two limits matter. A child 14 or older may make a nomination of their own, and a parent's nominee is appointed only absent an effective nomination by the child. And no nomination overrides an appointment the court has already made. Name an alternate. Read naming a guardian for the court process.

The House And The Truck Can Skip Probate

A transfer on death deed. South Dakota adopted the Real Property Transfer on Death Act in 2014. SDCL 29A-6-403 lets you transfer real property to one or more beneficiaries by a deed that takes effect at your death. Under SDCL 29A-6-408, the deed must carry the elements of a recordable deed, state that the transfer occurs at your death, and be recorded before your death with the register of deeds in the county where the land sits. An unrecorded deed does nothing. SDCL 29A-6-405 keeps the deed revocable even if it says otherwise. See the South Dakota transfer on death deed.

A transfer on death title. Since July 1, 2025, SDCL 32-3-80 lets the owner of a motor vehicle, off-road vehicle, snowmobile, or boat name a beneficiary on the certificate of title, and a trust may be that beneficiary. All owners must approve in writing. SDCL 32-3-83 bars the designation if the property carries any lien or other encumbrance, so pay off the loan first. See South Dakota vehicle transfers.

Joint accounts, retirement plans, and life insurance pass by their own paperwork. Keeping assets out of probate compares the routes.

What South Dakota Decides If You Sign Nothing

Skipping the documents just means South Dakota's defaults apply.

Your property. SDCL 29A-2-102 gives your spouse the whole intestate estate if all your surviving descendants are also your spouse's, or if you leave no descendants. If you have a child from another relationship, your spouse takes the first $100,000 plus half of the balance. See South Dakota intestate succession.
Your medical care. The 34-12C-3 list picks a decision maker by relationship.
Your money during incapacity. With no durable power of attorney, someone asks the court to appoint a conservator, with a petition, a hearing, and ongoing reports.
Your children. With no nomination, the court chooses under 29A-5-202, weighing location, relationship, and the child's wishes.
Your estate's manager. The court appoints a personal representative under the priority rules. South Dakota executor duties covers that job, and the South Dakota probate guide walks the case.

South Dakota Charges No Estate Or Inheritance Tax

The Legislature repealed both in 2014. SL 2014, chapter 59, "An Act to repeal certain provisions imposing the inheritance tax and the estate tax," repealed SDCL chapter 10-40 (inheritance tax), chapter 10-40A (estate tax), and chapter 10-41 (administration and collection). The federal estate tax still exists and reaches only very large estates. South Dakota federal estate tax has the current threshold.

A Small Estate Is Still Worth Planning

People use South Dakota's affidavit routes as a reason to sign nothing. Look at what they do. SDCL 29A-3-1201 lets a successor collect personal property by affidavit 30 days after death when the entire estate, wherever located, less liens and encumbrances, does not exceed $100,000. SDCL 29A-3-1203 is a separate affidavit for South Dakota real property worth no more than $50,000, filed 60 days after death. Both close if the decedent owed the Department of Social Services for nursing home or other medical institutional care. See the South Dakota small estate affidavit for the full test.

Where To Start

List what you own and how it is titled. Joint accounts, retirement plans, life insurance, and anything with a beneficiary designation pass outside your will.
Decide the four people. Who inherits, who serves as personal representative, who handles your money during incapacity, and who makes your medical calls.
Check your beneficiary designations. Retirement accounts and insurance policies follow the form on file, not your will.
Sign the documents to South Dakota's rules. Two witnesses for the will, durability words and a notary for the financial power of attorney, and two adult witnesses or a notary for the health care documents.
Decide about the land and the vehicles. Record a transfer on death deed, fund a trust, or accept probate. Add a beneficiary to any unencumbered vehicle or boat title.
If you sign a trust, read the revocation clause. Under 55-3-6, silence makes it irrevocable.
Store the originals somewhere findable. A court deposit under 29A-2-515 is one option for the will.
Review after any change. Marriage, divorce, a birth, a death, a new loan on a titled vehicle, or a move into or out of South Dakota.

When To Bring In A South Dakota Attorney

Handle a straightforward plan yourself if you like. Bring in a licensed South Dakota attorney when you have a blended family, a child with special needs, a business or a farm, land in more than one state, an estate near the federal exemption, a trust you want to keep irrevocable on purpose, or any reason to expect a fight. An attorney is also the right call if a family member is already losing capacity, because a document signed without capacity invites a challenge.

Frequently Asked Questions

What documents does a South Dakota estate plan need?

Three for most adults, plus a fourth when your situation calls for it. A will under SDCL chapter 29A-2 decides who inherits your probate property, who serves as personal representative, and who you nominate to raise your minor children. A durable power of attorney under SDCL chapter 59-12 covers your money if you cannot act. A durable power of attorney for health care under SDCL 59-7-2.1, often paired with a living will declaration under SDCL 34-12D-2, covers your medical care. A revocable trust sits on top of those when you want assets to pass without a probate case.

How many witnesses does a South Dakota will need?

Two or more. SDCL 29A-2-502(b) requires a writing signed by you, or by someone else in your conscious presence and at your direction, and signed in your conscious presence by two or more individuals who witnessed your signing or your acknowledgment of the signature. A will is also valid as a holographic will under 29A-2-502(a) if the signature and material portions are in your handwriting.

Is a South Dakota power of attorney durable automatically?

No. Under SDCL 59-12-3, a power of attorney keeps working through your disability only if it contains words such as "This power of attorney shall not be affected by disability of the principal" or similar words showing that intent. Leave those words out and SDCL 59-12-9(1)(b) ends the power when you become incapacitated, which is the moment your family needs it.

Does a South Dakota power of attorney have to be notarized?

Yes, for a financial power of attorney. SDCL 59-12-4 says the principal's signature shall be acknowledged before a notary public or other individual authorized by law to take acknowledgments. A durable power of attorney for health care follows a different rule: SDCL 59-7-2.1 accepts two adult witnesses or a notary public.

Is a South Dakota trust revocable unless it says otherwise?

No. SDCL 55-3-6 says that unless the terms of a trust expressly reserve a power to the settlor to revoke or modify it, the trust shall be irrevocable. That is the opposite of the rule in many other states, so a living trust must state the power to revoke and amend in plain words.

Does South Dakota have an estate tax or an inheritance tax?

No. SL 2014, chapter 59 repealed the inheritance tax (SDCL chapter 10-40), the estate tax (chapter 10-40A), and their administration chapter (10-41). The federal estate tax still exists and reaches only very large estates.

Who makes my medical decisions in South Dakota if I sign nothing?

SDCL 34-12C-3 sets the order when you have no health care power of attorney and no guardian of the person: your spouse if not legally separated, then an adult child, a parent, an adult sibling, a grandparent or adult grandchild, an adult aunt, uncle, cousin, niece or nephew, and then a close friend. You can disqualify a family member ahead of time in a signed document or by a notation in your medical record made at your direction.

This guide is general information about South Dakota estate planning documents, read against the South Dakota Codified Laws in force on September 27, 2026. Confirm anything that affects your own situation with a licensed South Dakota attorney before you sign, because these documents decide who controls your money, your medical care, and your property.

Sources:

Title: SDCL 29A-2-501, Who may make a will. Publisher: South Dakota Legislature. Publication Date: Not listed (accessed 2026-09-27). URL: https://sdlegislature.gov/Statutes/29A-2-501
Title: SDCL 29A-2-502, Holographic will, Validity of non-holographic will, Establishing intent. Publisher: South Dakota Legislature. Publication Date: Not listed (accessed 2026-09-27). URL: https://sdlegislature.gov/Statutes/29A-2-502
Title: SDCL 29A-2-503, Writings intended as wills, etc. Publisher: South Dakota Legislature. Publication Date: Not listed (accessed 2026-09-27). URL: https://sdlegislature.gov/Statutes/29A-2-503
Title: SDCL 29A-2-504, Self-proved will. Publisher: South Dakota Legislature. Publication Date: Not listed (accessed 2026-09-27). URL: https://sdlegislature.gov/Statutes/29A-2-504
Title: SDCL 29A-2-505, Who may witness. Publisher: South Dakota Legislature. Publication Date: Not listed (accessed 2026-09-27). URL: https://sdlegislature.gov/Statutes/29A-2-505
Title: SDCL 29A-2-511, Testamentary additions to trusts. Publisher: South Dakota Legislature. Publication Date: Not listed (accessed 2026-09-27). URL: https://sdlegislature.gov/Statutes/29A-2-511
Title: SDCL 29A-2-515, Deposit of will with court in testator's lifetime. Publisher: South Dakota Legislature. Publication Date: Not listed (accessed 2026-09-27). URL: https://sdlegislature.gov/Statutes/29A-2-515
Title: SDCL 29A-2-804, Revocation of probate and nonprobate transfers by divorce, No revocation by other changes of circumstances. Publisher: South Dakota Legislature. Publication Date: Not listed (accessed 2026-09-27). URL: https://sdlegislature.gov/Statutes/29A-2-804
Title: SDCL 29A-2-102, Share of the spouse. Publisher: South Dakota Legislature. Publication Date: Not listed (accessed 2026-09-27). URL: https://sdlegislature.gov/Statutes/29A-2-102
Title: SDCL 59-12-2, Applicability. Publisher: South Dakota Legislature. Publication Date: Not listed (accessed 2026-09-27). URL: https://sdlegislature.gov/Statutes/59-12-2
Title: SDCL 59-12-3, Durable power of attorney. Publisher: South Dakota Legislature. Publication Date: Not listed (accessed 2026-09-27). URL: https://sdlegislature.gov/Statutes/59-12-3
Title: SDCL 59-12-4, Execution of power of attorney. Publisher: South Dakota Legislature. Publication Date: Not listed (accessed 2026-09-27). URL: https://sdlegislature.gov/Statutes/59-12-4
Title: SDCL 59-12-7, Nomination of conservator or guardian, Relation of agent to court-appointed fiduciary. Publisher: South Dakota Legislature. Publication Date: Not listed (accessed 2026-09-27). URL: https://sdlegislature.gov/Statutes/59-12-7
Title: SDCL 59-12-9, Termination of power of attorney or agent's authority. Publisher: South Dakota Legislature. Publication Date: Not listed (accessed 2026-09-27). URL: https://sdlegislature.gov/Statutes/59-12-9
Title: SDCL 59-12-41, Statutory form, Power of attorney. Publisher: South Dakota Legislature. Publication Date: Not listed (accessed 2026-09-27). URL: https://sdlegislature.gov/Statutes/59-12-41
Title: SDCL 59-7-2.1, Principal, Designation, Healthcare. Publisher: South Dakota Legislature. Publication Date: Not listed (accessed 2026-09-27). URL: https://sdlegislature.gov/Statutes/59-7-2.1
Title: SDCL 59-7-11, Appointment of guardian terminates power of attorney. Publisher: South Dakota Legislature. Publication Date: Not listed (accessed 2026-09-27). URL: https://sdlegislature.gov/Statutes/59-7-11
Title: SDCL 34-12D-2, Declaration, Requirements to execute, Artificial nutrition and hydration. Publisher: South Dakota Legislature. Publication Date: Not listed (last amended by SL 2023, ch 115; accessed 2026-09-27). URL: https://sdlegislature.gov/Statutes/34-12D-2
Title: SDCL 34-12H-2, Patient or representative may execute MOST. Publisher: South Dakota Legislature. Publication Date: Not listed (accessed 2026-09-27). URL: https://sdlegislature.gov/Statutes/34-12H-2
Title: SDCL 34-12C-3, Absence of power of attorney or appointed guardian, Consent by others, Disqualification, Delegation of authority, Wishes of incapacitated person, Recommendation of physician. Publisher: South Dakota Legislature. Publication Date: Not listed (accessed 2026-09-27). URL: https://sdlegislature.gov/Statutes/34-12C-3
Title: SDCL 55-3-6, Trust irrevocable in absence of express contrary provisions. Publisher: South Dakota Legislature. Publication Date: Not listed (last amended by SL 2019, ch 209; accessed 2026-09-27). URL: https://sdlegislature.gov/Statutes/55-3-6
Title: SDCL 55-4-58, Presentation of claims against property of trust revocable at settlor's death. Publisher: South Dakota Legislature. Publication Date: Not listed (accessed 2026-09-27). URL: https://sdlegislature.gov/Statutes/55-4-58
Title: SDCL 55-1-21, Trust for care of animal, care of other property, or other lawful noncharitable purpose. Publisher: South Dakota Legislature. Publication Date: Not listed (accessed 2026-09-27). URL: https://sdlegislature.gov/Statutes/55-1-21
Title: SDCL 29A-5-202, Nomination of guardian or conservator by minor or parent. Publisher: South Dakota Legislature. Publication Date: Not listed (accessed 2026-09-27). URL: https://sdlegislature.gov/Statutes/29A-5-202
Title: SDCL 29A-6-403, Transfer on death deed authorized. Publisher: South Dakota Legislature. Publication Date: Not listed (accessed 2026-09-27). URL: https://sdlegislature.gov/Statutes/29A-6-403
Title: SDCL 29A-6-405, Transfer on death deed revocable. Publisher: South Dakota Legislature. Publication Date: Not listed (accessed 2026-09-27). URL: https://sdlegislature.gov/Statutes/29A-6-405
Title: SDCL 29A-6-408, Requirements. Publisher: South Dakota Legislature. Publication Date: Not listed (accessed 2026-09-27). URL: https://sdlegislature.gov/Statutes/29A-6-408
Title: SDCL 32-3-80, Transfer on death, Designation of beneficiary. Publisher: South Dakota Legislature. Publication Date: Not listed (enacted by SL 2025, ch 116, effective 2025-07-01; accessed 2026-09-27). URL: https://sdlegislature.gov/Statutes/32-3-80
Title: SDCL 32-3-83, Transfer on death, Ineligible if encumbered, Certificate not issued. Publisher: South Dakota Legislature. Publication Date: Not listed (enacted by SL 2025, ch 116, effective 2025-07-01; accessed 2026-09-27). URL: https://sdlegislature.gov/Statutes/32-3-83
Title: SDCL 29A-3-1201, Collection of personal property by affidavit. Publisher: South Dakota Legislature. Publication Date: Not listed (last amended by SL 2022, ch 88; accessed 2026-09-27). URL: https://sdlegislature.gov/Statutes/29A-3-1201
Title: SDCL 29A-3-1203, Succession to real property by affidavit. Publisher: South Dakota Legislature. Publication Date: Not listed (enacted by SL 2022, ch 89; accessed 2026-09-27). URL: https://sdlegislature.gov/Statutes/29A-3-1203
Title: SL 2014, ch 59 (HB 1057), An Act to repeal certain provisions imposing the inheritance tax and the estate tax. Publisher: South Dakota Legislature. Publication Date: 2014-02-12 (signed). URL: https://mylrc.sdlegislature.gov/api/Documents/SessionLaw/32211.html

It is not legal advice.