Changing an Irrevocable Trust: Decanting, Reformation, and Beneficiary Consent

An irrevocable trust drafted thirty years ago is running on assumptions nobody would make today — about tax rates, about a beneficiary who now receives disability benefits, about a trustee that has been acquired twice, about a state whose law the family left behind.

Trust modification is state law. There is no federal statute that lets anyone rewrite a trust, and no two states approach the question identically. What most states now provide is a set of parallel routes, some requiring a court and some not, each with its own prerequisites. The federal tax code sits on top as an overlay: it does not tell you whether a change is permitted, only what it costs.

The six routes, and which one fits

Decanting: what it is and where the authority comes from

Decanting takes the trustee's existing power to distribute property to or for a beneficiary and treats it as a power to distribute that property to a second trust for that beneficiary instead. The metaphor is pouring wine from one bottle into another and leaving the sediment behind.

Authority comes from one of three places: a state decanting statute, the common law of a handful of states that recognized the power judicially, or the trust instrument itself where the drafter granted it. Most states now have a statute, and a number have adopted the Uniform Trust Decanting Act promulgated by the Uniform Law Commission. Adoption is not uniform in substance either — states amend the model text, so the enacted statute is what governs, not the model.

The uniform act's central idea is that what a trustee can change depends on how much discretion the trustee already has. A trustee with expanded distributive discretion — discretion not limited by an ascertainable standard — can make broader changes, including extending the trust's duration for a beneficiary. A trustee whose discretion is limited to health, education, maintenance, and support can make far fewer, essentially preserving the beneficial interests while improving administration. Separate provisions protect a beneficiary with a disability, allow removal of a trustee's own conflicts, and forbid using the power to reduce a fiduciary's accountability.

• Confirm the governing law and that the state's statute applies to this trust.
• Read the instrument for an express prohibition on decanting or on distributions in further trust.
• Classify the trustee's discretion as expanded or limited under the statute's definitions.
• Identify every person entitled to notice, including remainder and contingent beneficiaries and, in some states, the attorney general for charitable interests.
• Draft the second trust so that no new beneficiary is added and no vested interest is stripped.
• Give written notice for the statutory period — commonly sixty days — before the exercise takes effect.
• Execute a written instrument of exercise, and record it where real property is involved.
• Retitle assets and update the taxpayer identification number, payors, and custodians.

Decanting is a fiduciary act, not a clerical one. The trustee's duty of loyalty and duty of impartiality apply to the decision, and a trustee who decants to remove its own exposure or to favor one branch of a family has a problem no statute cures. Where the change is significant, trustees commonly seek beneficiary consents or court approval even when the statute does not require them, precisely to close off later claims and to obtain any available indemnification.

The federal tax overlay

State law says whether a change is permitted. Federal tax law says what it costs, and here the guidance is thinner than practitioners would like.

The IRS requested public comment on the tax consequences of decanting in 2011 and has generally declined to issue rulings on the question since, leaving it on the agency's no-rule ground while a guidance project sat on Treasury priority lists. As of mid-2026 no comprehensive regulations have been issued. That does not make decanting unsafe; it means the analysis runs through existing doctrine rather than a dedicated rule.

Four exposures recur. A trust that predates the generation-skipping transfer tax and is grandfathered can lose that status if a modification shifts a beneficial interest to a lower generation or extends the vesting period, so regulatory safe harbors have to be checked before anything is signed. A beneficiary who consents to give up an interest may be making a gift. A distribution to a second trust can carry income out under the distributable net income rules, which matters when the two trusts are taxed differently — the mechanics are covered in our brief on fiduciary income tax returns. And a change that alters who is treated as the owner for income tax purposes can switch grantor trust status on or off, with the consequences described in grantor trusts and income tax.

Verify before relying: confirm the enacted text of the state statute and its effective date, not a summary of the uniform act, and confirm whether the trust's governing law can be changed at all before assuming a friendlier state's rules are available.

Documenting the change so it holds

Modification files are read years later by a successor trustee, a beneficiary's lawyer, or an examining agent. Three things belong in the file in every case: a written statement of the problem being solved and why the chosen route was appropriate, evidence of who received notice and when, and the pre-change and post-change terms shown side by side. Where consents were obtained, keep proof of what was disclosed before signature — a consent given without full information is worth very little. Where the change affects distributions, the next fiduciary accounting should show the transition clearly rather than presenting the new trust as if it had always existed.

Questions the desk gets

Can decanting be used to cut out a beneficiary the family has fallen out with?

Generally no. Decanting statutes and the uniform act forbid adding beneficiaries, and they protect interests that are already vested. A trustee with expanded discretion may be able to change the form or timing of what a beneficiary receives — converting an outright distribution at a stated age into a continuing trust, for example — but eliminating a beneficiary entirely is the classic misuse. It also invites a breach claim that no exculpation clause reliably covers.

Is moving a trust to another state enough to get that state's decanting law?

Sometimes, and only if done correctly. Changing situs typically requires authority in the instrument or under the current governing law, a trustee with a real connection to the new state, and an actual move of administration. Courts and taxing authorities look at where the trustee acts, where records are kept, and where decisions are made. A paper change of address does not shift governing law, and the original state may continue to assert income tax nexus.

What if the trust simply has a drafting error?

That is reformation territory, not decanting. Most states allow a court to reform terms to conform to the settlor's intent where clear and convincing evidence shows both the intent and that the terms were affected by a mistake of fact or law, and many allow modification to achieve a settlor's tax objectives in a manner not contrary to that intent. Reformation can be retroactive, which is often the point; decanting is prospective.

Do beneficiaries have to be told?

Under decanting statutes, almost always — notice to qualified beneficiaries is the standard prerequisite, with a waiting period before exercise. Under nonjudicial settlement agreements, the interested persons are parties by definition. Even where notice is not strictly required, silence is the wrong instinct: disclosure is what starts limitation periods running against a later challenge, as explained in fiduciary duties of executors and trustees.

Sequencing the work

Start with the instrument, because a built-in amendment or protector power is faster and cheaper than anything the statute offers. If the document is silent, identify the governing state and read its actual statute. Then choose the least intrusive route that solves the problem — administrative fixes rarely need a court, and beneficial changes rarely avoid one. Run the tax check before execution, not after, with particular attention to grandfathered generation-skipping status. Finally, give real notice and build a file that explains the reasoning.

Related material sits in our briefs on irrevocable life insurance trusts and on the Estate, Tax & Succession desk. This brief describes state trust law that varies substantially between jurisdictions and a federal tax overlay that remains partly unresolved; it is general information, not legal or tax advice, and no trust should be modified without counsel admitted where the trust is administered.