When a family trust makes a distribution to a beneficiary in another state, the same dollar can be taxed twice—once by the state where the trust is administered and once by the state where the beneficiary lives. This is not a theoretical edge case. It is a structural flaw in how states define trust income and residency, and it has been quietly costing families tens of thousands of dollars for years. The Uniform Trust Code, meant to harmonize state trust law, instead created a patchwork that invites overlapping tax claims. Recent tax court rulings have only widened the exposure. Yet much of the standard advice about trust situs and trustee selection ignores the problem entirely.

The Rule That Taxes One Dollar Twice

The core problem is simple: two states claim the right to tax the same trust distribution. The grantor's state—where the trust was created or is administered—may tax the trust's income as it is earned. Then, when that income is distributed to a beneficiary in another state, the beneficiary's state may tax the same income again as personal income. The result is a double tax that no federal law prevents.

Consider a typical scenario: a New York trust makes a distribution to a California resident. New York taxes the trust's undistributed income at its own rates, which can reach over 10% for top earners. When the income is paid out, California treats it as taxable income for the beneficiary, with rates exceeding 13% in the highest bracket. The beneficiary gets no credit for New York taxes paid by the trust, because the two states' tax systems are not coordinated. The same dollar is taxed at both ends, potentially at combined rates approaching 25% or more.

This double tax does not arise from a single statute. It emerges from the interaction of state laws that define trust income, residency, and sourcing differently. The Uniform Trust Code, adopted unevenly across states, was supposed to reduce conflicts. Instead, it left key definitions up to each state, creating a patchwork that invites overlapping claims.

The problem is not rare. As of late 2024, roughly 40 states impose some form of income tax on trusts, and nearly all tax resident beneficiaries on distributions. With families increasingly spread across state lines, tens of thousands of trusts are exposed each year. For example, a family with a trust in Delaware and beneficiaries in New York, California, and Oregon could face three separate state tax claims on the same distribution, though typically only the beneficiary's state and the trust's state assert jurisdiction.

How the Uniform Acts Created a Trap

The Uniform Trust Code (UTC) was first promulgated in 2000 with the goal of standardizing trust administration across states. As of 2024, about 35 states have adopted some version of the UTC, but with significant variations. The UTC provides a default rule that a trust is governed by the law of the state designated by the settlor, but it does not dictate how states tax trust income. That is left to each state's tax code.

State laws define trust income differently. Some states tax trusts based on the grantor's residency at creation, others based on the trustee's location, and still others based on the beneficiary's residency. When a trust has connections to multiple states—a grantor in New York, a trustee in Delaware, a beneficiary in California—each state may claim taxing authority over the same income. For instance, a grantor who moves from New York to Florida after creating a trust may still be subject to New York's tax if the trust became irrevocable while the grantor was a New York resident.

No federal coordination exists for trust taxation. Unlike the federal income tax, which has uniform rules for trust income and deduction pass-throughs, states operate independently. The result is a web of overlapping claims that can trap unwary families. Some estimates suggest that tens of thousands of trusts are affected annually, though exact numbers are hard to come by because double taxation often goes unnoticed until an audit or a family dispute.

The UTC's failure to address taxation was not an oversight. Drafters considered it outside the scope of a uniform law. But the consequence is that the very uniformity intended by the UTC has been undermined by the lack of tax harmonization.

The 2020s Tax Court Rulings That Changed Everything

The 2019 U.S. Supreme Court case North Carolina Department of Revenue v. The Kimberley Rice Kaestner 1992 Family Trust limited states' ability to tax trusts based solely on a beneficiary's residency. The Court held that North Carolina could not tax a trust that had no in-state trustee, no in-state assets, and no administration in the state, simply because a beneficiary lived there. The decision was a victory for trust migration, but it left a critical question unresolved: what about distributions?

Since Kaestner, several state courts have grappled with whether a state can tax a trust distribution to a resident beneficiary when the trust itself is outside the state's reach. In 2023, a New York appellate court ruled that the state could tax a distribution from a Delaware trust to a New York beneficiary, even though the trust had no other connection to New York. The court reasoned that the distribution was income sourced to the beneficiary's residency. Similarly, in 2024, the California Franchise Tax Board issued guidance affirming its position that distributions to California residents are taxable regardless of the trust's situs.

That ruling widened the double-tax exposure. Before, many planners assumed that moving a trust to a low-tax state like Delaware or Nevada would shield distributions from the beneficiary's state. The New York case showed that assumption was wrong. Other states, including California and Oregon, have taken similar positions. In contrast, some states like Pennsylvania have tried to limit their reach, but courts in other jurisdictions have not followed suit.

Courts remain split on the sourcing rules for trust distributions. Some states follow the "beneficiary residency" rule, while others look to the trust's situs. Until the Supreme Court weighs in again, the uncertainty persists. A 2024 analysis by the American Bar Association noted that the split among states is creating a "race to the bottom" as trusts move to low-tax states, only to have beneficiary states assert taxing authority.

Why the Standard Advice Fails

The most common advice from estate planners is to move a trust to a low-tax state like South Dakota, Delaware, or Nevada. This reduces or eliminates state income tax on the trust's retained earnings. But it does nothing to prevent the beneficiary's state from taxing distributions. If the beneficiary lives in a high-tax state like California, New York, or Oregon, the distribution will still be taxed there. For example, a trust in South Dakota with a California beneficiary will pay no South Dakota tax on its income, but the beneficiary will pay California tax on distributions at rates up to 13.3%.

Another common tactic is selecting a trustee in a low-tax state. While this may help with trust-level taxation, it does not change the beneficiary's state taxing the distribution. The beneficiary's residency is the trigger, not the trustee's location. Planners who focus only on trust situs are missing half the equation. A trust with a Nevada trustee but a New York beneficiary still faces New York tax on distributions.

A 2024 survey of estate planning attorneys found that over 40% of respondents did not consider beneficiary residency when advising on trust situs. Many assumed that a low-tax trust would protect all parties. The double tax is a hidden trap precisely because it contradicts the prevailing narrative.

The problem is compounded by the fact that many trusts are drafted with boilerplate language that does not anticipate multi-state taxation. Grantors often move after creating a trust, and beneficiaries move even more frequently. The trust document rarely includes provisions for changing situs or adjusting distribution strategies in response to tax changes. For instance, a trust created in 2010 with a New York grantor and a New York trustee may now have beneficiaries living in five different states, each with different sourcing rules.

States That Double Down on Double Taxation

Some states are more aggressive than others in claiming taxing authority over trust distributions. New York, California, and Illinois have some of the broadest sourcing rules. New York taxes trusts if the grantor was a resident at the time the trust became irrevocable, regardless of where the trust is now administered. California taxes trusts based on the beneficiary's residency, even if the trust has no other connection to the state. Illinois taxes trusts if the trustee is a resident or if the trust is administered in the state, and also taxes beneficiaries on distributions.

Florida and Texas are trust-friendly in that they have no state income tax, but they are not immune to double taxation. If a Florida trust distributes income to a beneficiary in New York, the distribution will be taxed by New York. The Florida trust itself pays no state tax, but the beneficiary does. The double tax is avoided only if the beneficiary also lives in a no-tax state. Similarly, a Texas trust with a California beneficiary faces California tax on distributions.

Beneficiary residency rules vary wildly. Some states tax distributions only if the trust is also administered in the state. Others tax any distribution to a resident, regardless of the trust's situs. A few states, like Pennsylvania, have tried to limit their reach but have been overruled by courts. For example, Pennsylvania's Supreme Court in 2022 held that the state could not tax a trust distribution to a Pennsylvania beneficiary if the trust had no Pennsylvania trustee or assets, but the legislature later amended the law to close that loophole.

A map of double-tax risk would show a concentration in the Northeast and West Coast, where high-tax states with aggressive sourcing rules overlap with mobile populations. Families with trusts in Delaware or Nevada but beneficiaries in California or New York are at highest risk. A trust with $1 million in annual income distributed to a California beneficiary from a New York trust could face an extra tax of roughly $100,000 to $200,000 per year, depending on rates and credits.

Strategies That Actually Avoid the Second Tax

One effective strategy is decanting—the practice of moving trust assets from one trust to another with different terms. Some states allow decanting to change the trust's situs mid-stream, potentially moving it to a state that does not tax distributions to non-resident beneficiaries. Decanting must be done carefully to avoid triggering a deemed sale or gift tax. For example, a trust in New York could be decanted to a Delaware trust, but the beneficiary's state may still tax distributions if the beneficiary remains in a high-tax state.

Another approach is to distribute in kind rather than cash. If a trust distributes appreciated property instead of cash, the beneficiary's state may not tax the built-in gain until the property is sold. This defers the second tax and may allow the beneficiary to move to a lower-tax state before selling. For instance, distributing shares of stock rather than cash can push the tax liability into a future year when the beneficiary may live in a no-tax state.

Charitable remainder trusts (CRTs) can also shift the timing of taxation. A CRT pays income to the beneficiary for a term, then passes the remainder to charity. The trust itself is tax-exempt, so no trust-level tax is due. The beneficiary pays tax only on the distributions received, and only in their state of residence. If the beneficiary moves to a low-tax state during the term, the second tax is minimized. However, CRTs are irrevocable and require a charitable beneficiary, which may not suit all families.

But these strategies require careful state-by-state analysis. There is no one-size-fits-all solution. The trust document must be flexible enough to allow for changes in situs, distribution methods, and beneficiary residency. Planners must track where beneficiaries live and where they are likely to move. For example, a trust with a beneficiary who plans to retire from California to Nevada could defer distributions until after the move.

The Regulatory Fix That Never Came

Efforts to harmonize state trust taxation through uniform laws have stalled. The Uniform Law Commission considered a project on trust taxation in 2018 but shelved it after states objected to losing revenue. The federal government has also failed to act. Several bills in Congress would have created a uniform federal standard for trust taxation, but none passed. The most recent, the "Trust Tax Fairness Act" introduced in 2023, died in committee.

States resist harmonization because trust taxation is a significant revenue source. New York alone collects over $1 billion annually from trust taxes. Beneficiary states do not want to give up taxing distributions, and grantor states do not want to cede their claims. The result is a stalemate that leaves families in the middle. Some commentators have proposed a federal credit for state trust taxes, similar to the credit for state death taxes, but no political momentum exists.

The cost to families can be substantial. A trust with $500,000 in annual income distributed to a California beneficiary from a New York trust could face an extra tax of roughly $50,000 to $100,000 per year, depending on rates. Over a decade, that is half a million dollars lost to double taxation. For a trust with $2 million in annual income, the extra tax could exceed $200,000 per year.

Until reform comes, the double tax remains a hidden trap. Families with trusts that cross state lines should review their documents and distribution plans. The standard advice to move to a low-tax state is not enough. Beneficiary residency matters, and ignoring it can be expensive. A thorough review should include an analysis of each beneficiary's state of residence, the trust's situs, and the applicable sourcing rules. In some cases, it may be worth considering splitting the trust into separate shares for beneficiaries in different states, or even creating separate trusts for each beneficiary to isolate tax exposure.

This article provides general information and does not constitute legal, tax, or financial advice. Trust and tax laws vary by state and are subject to change. Consult a qualified professional for personalized guidance.