Missouri Estate Planning Law Updates 2026

This update is a current-framework snapshot, not a list of new bills. The one piece of an estate plan that genuinely moves is the federal estate-tax exemption, which is set by federal law, adjusted for inflation, and subject to scheduled change — so this page deliberately does not print a dollar figure, and you should verify the current number before relying on it. The general rule of thumb is simple: confirm any specific figure, and confirm any specific deadline, against the current statute or a qualified Missouri attorney before you act. Below is what stays stable, what moves, and how to check.

Missouri's core estate-planning tools (wills, trusts, POAs)

The building blocks of a Missouri estate plan are well-settled. A will under Chapter 474 RSMo directs who receives your property, names a personal representative, and can name a guardian for minor children; Missouri generally requires the will to be in writing, signed, and witnessed by at least two competent witnesses. A revocable living trust under Chapter 456 RSMo, the Missouri Uniform Trust Code, can avoid probate for assets actually titled in its name and can manage assets if you become incapacitated. A durable power of attorney under Chapter 404 RSMo lets you name an agent to handle finances if you cannot, and health-care directives let someone make medical decisions for you.

As of 2026, none of these core tools has been replaced or fundamentally restructured. The execution formalities, fiduciary duties of trustees, and the basic distinction between revocable and irrevocable trusts continue to operate as they have for years. If you already have a properly executed will, trust, and powers of attorney, the underlying law has not pulled the rug out from under them. What changes is your life and your assets — and those are the usual reasons to revisit a plan, not legislative upheaval.

No Missouri estate or inheritance tax

A point worth restating every year because it causes so much needless worry: Missouri has no state estate tax and no state inheritance tax. Missouri repealed its separate estate tax, so a Missouri resident's estate is not subject to a state-level death tax, and heirs do not pay a Missouri inheritance tax on what they receive. This has been the case for years and remains true as of 2026.

That means the death tax most Missouri families never have to think about is the state one — there isn't a Missouri version to plan around. The only estate tax that can ever apply to a Missouri resident is the federal estate tax, discussed next, and it reaches only very large estates. For the vast majority of Missouri households, the practical estate-planning goals are avoiding probate, coordinating beneficiary designations, and planning for incapacity — not minimizing a tax bill that will never come due.

The federal estate tax (a moving, inflation-adjusted figure)

The federal estate tax is the one genuinely moving part of this picture. It is imposed by federal law, not Missouri law, and it applies only to estates above a high exemption threshold. That exemption amount is set by Congress, indexed for inflation, and scheduled to change under current federal law — which is exactly why this page does not state a specific dollar figure. Any number printed here would risk being out of date, and an out-of-date number is worse than none.

What you should take away as of 2026 is the shape of the rule, not a figure: the federal exemption is large, it covers the great majority of estates completely, and it is a moving target. If your estate might be sizable enough to approach the federal threshold, do not rely on a remembered number or an older article. Confirm the current federal exemption — and whether any scheduled adjustment or sunset is about to take effect — with a qualified professional before making tax-driven decisions. For most Missouri families, the federal estate tax simply does not apply, and confirming that is usually quick.

What stays stable vs. what to recheck

It helps to separate the durable from the moving. The following tend to stay stable in Missouri: the existence and basic requirements of wills under Chapter 474 RSMo; the trust framework under Chapter 456 RSMo; durable powers of attorney under Chapter 404 RSMo; nonprobate transfers such as beneficiary deeds, payable-on-death and transfer-on-death registrations, and survivorship titles; and the probate process under Chapter 473 RSMo, including small-estate procedures. These are the bones of a plan, and they rarely shift from one year to the next.

What you should recheck is anything tied to a specific number or deadline. The federal estate-tax exemption is the clearest example — it is inflation-adjusted and scheduled to change. Dollar thresholds within Missouri's probate statutes, such as the small-estate ceiling, and procedural deadlines such as creditor-claim windows can also be adjusted by the legislature over time. As of 2026, the prudent habit is to treat the framework as stable but to verify any exact figure or filing deadline against the current statute before you rely on it.

How to confirm current law and figures

Confirming current Missouri law is straightforward if you go to durable sources. The Missouri Revised Statutes themselves — Chapters 404, 456, 473, and 474 RSMo — are the authoritative text, and Missouri publishes the current statutes through the General Assembly. Because Missouri's trust and probate statutes change through the legislature, watching for amendments to those chapters is the way to track changes; a single legislative session can adjust a threshold or a procedure.

For the federal estate-tax exemption, the source is federal law and the federal taxing authority, which publishes the inflation-adjusted figure that applies for a given period. The exemption changes on a federal schedule independent of anything Missouri does, so confirm it separately. When in doubt about either the Missouri framework or a federal figure, a qualified Missouri estate planning attorney can confirm what currently applies to your situation and flag any scheduled change that should affect your timing.

When to talk to a lawyer

Consider getting advice when you have minor children and need to name a guardian, when you own real estate or a business or assets in more than one state, when you have a blended family or want to provide for someone with special needs, when you are choosing between a will-based plan and a revocable living trust, or when your estate may approach the federal estate-tax threshold and you need the current figure confirmed. A qualified Missouri attorney can verify your documents meet Missouri's formalities, coordinate your will, trust, and nonprobate transfers, and tell you which numbers and deadlines currently apply before you act.