Missouri Wills vs. Trusts: The Show-Me State’s Unique Estate Laws

January 22, 2024
Written by: Insurance&Estates | Last Updated on: April 10, 2025
Fact Checked by Jason Herring and Barry Brooksby (licensed insurance experts)

Insurance and Estates, a strategic life insurance provider composed of life insurance professionals, is committed to integrity in our editorial standards and transparency in how we receive compensation from our insurance partners.

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Missouri Wills vs. Trusts

Navigating Missouri estate planning doesn’t have to be a headache. Whether you’re looking at a will vs a trust, understanding the key differences can save your family significant time, money, and stress. This comprehensive guide breaks down Missouri’s unique laws to help you make the right choice for your legacy.


US Map For The Different Will and Trust Requirements by State

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Statutory Authority

Wills

Missouri Probate Code, Chapter 474. R.S. Mo. §474.310, et. seq.

Trusts

Missouri Uniform Trust Code, R.S. Mo., §§456.1-101 to 456.11-1106.

Missouri Will Requirements

A Missouri Last Will and Testament should include:

  • Age and Capacity: Testator must be “of sound mind” and at least 18 years old (an individual under 18 can only make a valid will if married, in the armed services, or legally emancipated by court order)
  • Sound Mind Definition: Must understand and remember the estate and general affairs, familial relationships, and the overall implications of executing the document
  • Format: Must be in writing
  • Signature: Must be signed by the testator (or by another person for the testator at the testator’s request)
  • Witnesses: Must be signed by at least two witnesses (anyone generally capable of acting as a witness in Missouri can witness a will)

Interested Witnesses

A Missouri will witnessed by someone who stands to gain under the will is not invalid based solely upon the interested witness. However:

  • A devise to an interested witness is deemed void to the extent, in the aggregate, total devises to the interested witness exceed the share of the estate he or she would have received had the testator died intestate
  • A witness’s status as an executor or creditor of an estate does not make the witness an interested party under Missouri law

Self-Proved Wills

Missouri wills need not be notarized, but a will can become self-proved through execution of a notarized affidavit by the will’s testator and witnesses. Self-proving affidavits:

  • Can be executed at the same time as the will itself or subsequent to execution
  • Include the testator’s attestation that the document was voluntarily created as a will while the testator had capacity and was under no undue influence
  • Include witnesses’ attestation that the testator signed the document willingly with the intent that it be a will, had legal capacity, and was under no undue influence
  • Serve in place of witness testimony before the probate court
  • Must attest to the facts necessary to authenticate the will in probate

The Missouri legislature provides a sample form for a self-proved affidavit, at R.S. Mo. §474.307.

Personal Property Memorandum

Missouri law permits testators to incorporate by reference written lists setting forth dispositions of specific items of tangible personal property not otherwise addressed in a will. The list or memorandum must:

  • Be written in the testator’s handwriting or signed by the testator
  • Be dated
  • Identify the devised items and intended recipients with reasonable certainty

A list of personal property can be created before or after a will is executed and can be altered by the testator. A personal property list cannot be used to distribute:

  • Cash
  • Promissory notes
  • Title instruments
  • Securities
  • Items used in trade or business

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Amendment, Revision, and Revocation of Missouri Wills

Revoking a Missouri Will

Under Missouri law, revocation of a written will must be accomplished through either:

  • Execution of a subsequent written will
  • Physical destruction of the will by the testator (or by someone in the testator’s presence acting at the testator’s direction)

Amending a Missouri Will

An existing will may be amended or supplemented by execution of a codicil satisfying all requirements for a written will.

If a subsequently executed will does not expressly revoke a prior will, the later will is deemed to supplement the earlier will, except to the extent of any inconsistencies (in which case the later will controls).

Automatic Revocation by Divorce

If a testator is divorced after executing a will, any provisions in favor of the former spouse are deemed to have been revoked. Property bequeathed to the former spouse is treated as if the former spouse predeceased the testator.

Marriage After Will Execution

If a testator marries after execution of a will and the will does not contemplate the marriage:

  • The surviving spouse inherits the same share of the estate he or she would have inherited had the testator died intestate
  • This doesn’t apply if the decedent made other arrangements to provide for the spouse outside the will or the omission otherwise appears intentional
  • A surviving spouse may alternatively opt to receive the elective share if it has not been waived

Children Born After Will Execution

If a child is born to or adopted by a testator after execution of a Missouri will—and if the testator’s will does not provide for or appear to intentionally omit the child—the child inherits a share of the estate equal to what the child would have inherited had the testator died intestate.

However, an afterborn child is not entitled to the intestate share if:

  • The testator had at least one other child when creating the will and left substantially all of the estate to a surviving spouse
  • The decedent made other arrangements to provide for the child outside the will

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Holographic and Oral Wills

Holographic Wills

Missouri law does not recognize holographic wills (i.e., a will in the decedent’s handwriting). A will written out by hand and signed by the testator can be valid, but only if it is also witnessed by two witnesses and otherwise satisfies the formalities for an attested will.

Oral (Nuncupative) Wills

Missouri recognizes oral (or “nuncupative”) wills under specific, limited circumstances:

  • The testator must make the statements while in imminent peril of death (including by sickness) from which the testator does not survive
  • The statements must be heard by two disinterested witnesses
  • The testator must declare that the oral statements are intended as the testator’s last will
  • One of the two witnesses must reduce the oral will’s terms to writing within 30 days of the statements
  • The oral will must be submitted for probate within six months of the testator’s death
  • Only effective for dispositions of personal property valued up to $500
  • Can be revoked through another nuncupative will

Missouri Trust Requirements

Missouri trusts are primarily governed by the Missouri Uniform Trust Code, enacted by the legislature at R.S. Mo., §456.1.101, et. seq.

Requirements for a Valid Missouri Trust

For a trust to be valid under Missouri law:

  • The purpose of the trust must be lawful, not in conflict with state public policy, and capable of being achieved
  • In general, the purposes of a trust and the trust itself must be to benefit the interests of the trust’s beneficiaries
  • The settlor must have adequate capacity to create the trust and express an intent to create a trust (for revocable trusts, the standard for capacity is the same as for wills)
  • A Missouri trust is invalid to the extent its creation was induced through fraud, duress, or undue influence

Trust Creation Methods

Missouri trusts can be created through:

  • Transfer of property by a grantor to a trustee (either during life or through a will or other testamentary instrument)
  • A grantor’s declaration that property is owned as trustee
  • Exercising a power of appointment in favor of a trustee
  • A court order establishing the trust

Required Trust Elements

Missouri trusts must have:

  • A definite beneficiary (subject to exceptions such as for charitable trusts, trusts for the care of animals, and certain trusts created for noncharitable purposes)
  • A trustee with actual duties to perform (and a trust’s sole trustee cannot also be the trust’s sole beneficiary)

Trustee Responsibilities

Trustees who manage assets are governed by the “prudent investor rule” and must exercise reasonable care, skill, and caution in carrying out their duties.

Oral Trusts

Though most trusts are evidenced by a written instrument setting forth the trust’s terms, Missouri law recognizes oral trusts. However:

  • The creation and terms of an oral trust must be established by clear and convincing evidence
  • If a trust holds land or is effectively testamentary, its creation must be evidenced by a writing signed by the grantor or through the grantor’s will

Trust Termination

Missouri trusts terminate upon:

  • Revocation or expiration under the trust’s own terms
  • When there is no purpose of the trust remaining to be achieved
  • When the trust’s purposes become unlawful, contrary to public policy, or impossible to achieve

A trust may also be modified or terminated by a court upon the petition of the settlor, trustee, and/or beneficiaries. When a trust terminates, the trust’s remaining assets are distributed by the trustee as directed by the trust’s terms or otherwise consistently with the trust’s purposes.

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Special Considerations

Estate Taxes

Missouri does not impose either estate or inheritance taxes. Large Missouri estates may still be liable for federal estate taxes.

Simplified Probate

Missouri law provides a streamlined probate process for “small estates” (defined as less than $40,000 in net value).

If an estate qualifies for simplified probate:

  • A personal representative or heir can submit an affidavit requesting simplified probate after 30 days
  • The affidavit must state whether the decedent left a will, itemize estate assets, and identify heirs and individuals or entities in possession of estate assets
  • The petition must also include a statement that claims against estate property have been or will be paid
  • If approved, the individual submitting the affidavit is authorized to collect estate property, pay creditor claims, and distribute estate assets to beneficiaries
  • He or she must obtain a bond and see that certain estate claims are paid

Non-Probate Transfers

Along with living trusts, Missouri law offers multiple other options for transfer of assets outside of probate:

Beneficiary Designations

  • POD (payable-on-death) and TOD (transfer-on-death) designations, which provide for automatic transfer of an asset to a beneficiary upon an owner’s death, can be used in Missouri for a variety of assets
  • POD designations can be added to financial accounts and CDs
  • TOD designations can be used with assets like registered securities and brokerage accounts
  • Similarly, some assets—like retirement accounts and life insurance—allow owners to name a beneficiary who automatically takes ownership of the asset upon the original owner’s death

Joint Ownership

  • Assets co-owned as joint tenants with a right of survivorship automatically transfer to a surviving owner upon the other owner’s death
  • Missouri also recognizes tenancy by the entireties, another joint ownership form with a right of survivorship
  • Tenancy by the entireties can only be used for co-ownership of assets by two spouses

Beneficiary Deeds and Vehicle Titles

Missouri is one of the few states that recognize TOD designations on both real estate deeds (commonly called “beneficiary deeds”) and vehicle titles.

  • The TOD designation is added to the deed or title during life, and ownership automatically transfers to the named beneficiary upon the owner’s death
  • The beneficiary does not acquire present rights over the asset until death actually occurs
  • Upon the original owner’s death, the beneficiary provides the death certificate to the land records office or DMV to have title to the real estate or vehicle officially transferred

Spousal Shares

Elective Share

Missouri law protects surviving spouses from disinheritance by guarantying a surviving spouse an elective share in a decedent spouse’s estate.

  • The amount of the elective share is generally fifty percent if the decedent leaves no children or grandchildren or one-third if the decedent has surviving issue
  • The spousal elective share includes all of the decedent’s probate assets (excluding funeral and administrative expenses, exempt assets and family allowances, and valid creditor claims), plus any assets transferred to another person or to a trust before the decedent’s death (but only if the transfer was made to avoid the spouse’s inheritance rights)
  • A surviving spouse can forego the elective share and opt instead to inherit under the provisions of a decedent spouse’s will
  • The elective share can also be waived through execution of a valid prenuptial or postnuptial agreement
  • The share is forfeit if the surviving spouse was living with another person in an adulterous relationship or had effectively abandoned the decedent spouse

Additional Spousal Rights

Along with the elective share, Missouri law also gives spouses the right to receive exempt property from the estate and a one-year support allowance awarded by a probate court.

Intestate Succession

If a spouse dies without a will, the surviving spouse of a Missouri resident receives:

  • The entire estate of a decedent spouse who leaves no surviving issue (i.e., no children or grandchildren)
  • $20,000 plus one-half the remainder if all of the decedent’s surviving issue are also the issue of the surviving spouse
  • One-half of the estate if the decedent leaves at least one child or grandchild who is not the issue of the surviving spouse

Spendthrift Trusts

Although the general rule is that creditors of a trust’s beneficiaries may attach a beneficiary’s interest in a trust, Missouri law recognizes “spendthrift provisions,” which prevent beneficiary creditors from attaching trust assets until actually distributed to the relevant beneficiary.

Spendthrift provisions do not protect against attachment to satisfy:

  • Domestic support obligations
  • Governmental claims
  • Claims of professionals who have assisted beneficiaries in protecting their interest in the trust

Creditors of a revocable trust’s settlor can attach trust assets as long as the settlor remains living. In the case of irrevocable trusts, settlors’ creditors can attach up to the maximum amount of trust assets that could be distributed for the settlor’s benefit.

Or, if the irrevocable trust includes a spendthrift provision, a settlor’s creditor can attach trust assets only if, at the time the trust became irrevocable:

  • The settlor was the sole beneficiary of principal or income
  • The settlor retained the power to amend the trust
  • The settlor was among a class of beneficiaries with the right to receive distributions determined exclusively by the written terms of the trust instrument

Qualified Spousal Trust

Missouri law allows married couples to jointly create a “qualified spousal trust” to hold assets of the two spouses. Qualified spousal trusts are:

  • Revocable
  • Both spouses are settlors and beneficiaries of the trust
  • For purposes of creditors’ claims, property held within a qualified spousal trust is treated as if it were held by the spouses as tenants by the entireties

Need help creating the right estate plan for your Missouri family?

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Wills vs. Trusts: Comparison

Feature Wills Trusts
When It Takes Effect After death Can be immediate (living trust) or after death (testamentary trust)
Probate Process Requires probate Assets in trust avoid probate
Privacy Public record Generally private
Challenges Can be challenged in probate court More difficult to challenge
Cost to Create Generally less expensive Usually more expensive
Ongoing Administration None until death May require ongoing management
Protection During Incapacity None (requires separate power of attorney) Can provide management if grantor becomes incapacitated
Alternatives in Missouri Beneficiary deeds for real estate and vehicles Qualified Spousal Trust for married couples

When It Takes Effect

Wills: After death

Trusts: Can be immediate (living trust) or after death (testamentary trust)

Probate Process

Wills: Requires probate

Trusts: Assets in trust avoid probate

Privacy

Wills: Public record

Trusts: Generally private

Challenges

Wills: Can be challenged in probate court

Trusts: More difficult to challenge

Cost to Create

Wills: Generally less expensive

Trusts: Usually more expensive

Ongoing Administration

Wills: None until death

Trusts: May require ongoing management

Protection During Incapacity

Wills: None (requires separate power of attorney)

Trusts: Can provide management if grantor becomes incapacitated

Alternatives in Missouri

Wills: Beneficiary deeds for real estate and vehicles

Trusts: Qualified Spousal Trust for married couples

Conclusion

Creating a will or trust does not have to be difficult or intimidating. However, certain circumstances—like second marriages, stepchildren, aging parents, special needs beneficiaries, guardianships, and business interests (to name a few)—can add a layer of complexity and result in unforeseen long-term consequences. Whenever any out-of-the-ordinary issues are present, it’s a good idea to consult with an experienced attorney familiar with and licensed under the laws of Missouri.

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  • ✓ Avoid costly probate and family disputes
  • ✓ Maintain privacy of your financial matters
  • ✓ Protect assets during incapacity
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