Trust tax rates are among the most compressed in the entire federal tax code, and that creates a real problem for families who rely on trusts as part of their estate plans. Individual taxpayers do not reach the top federal income tax bracket until their taxable income exceeds several hundred thousand dollars, yet trusts hit the highest marginal rate at a tiny fraction of that amount. If your estate plan includes one or more trusts, understanding how income tax on trusts works, and what you can do about it, is essential to preserving wealth for your beneficiaries.
The income threshold for trusts to trigger the top federal rates is remarkably low. For trusts and estates, the top ordinary income tax rate of 37%, the top long-term capital gains rate of 20%, and the 3.8% net investment income tax (NIIT) all apply once taxable income crosses a single low threshold that the IRS adjusts for inflation each year. Compare that to the individual threshold of more than $600,000 for the same top ordinary rate, and the tax-planning urgency becomes clear. This article answers one central question: how can a trustee or grantor legally reduce the income tax burden on a trust?
Why Trust Tax Rates Reach the Top Bracket So Quickly
The IRS applies a highly compressed rate schedule to trusts and estates. There are only four ordinary income tax brackets, and the gap between the lowest and the highest is narrow. A trust generating only modest taxable income can owe federal tax at the same marginal rate as an individual earning more than half a million dollars. The current bracket figures are published each year in the IRS inflation-adjustment guidance, such as Revenue Procedure 2025-32, and they shift slightly from one tax year to the next.
This compressed structure means that even modest investment returns inside a trust can produce a disproportionately large tax bill. A portfolio that throws off a few thousand dollars of interest, dividends, and realized gains can push a trust straight into the top bracket. That outcome rarely matches what the grantor intended when the trust was created.
The net investment income tax adds another layer. Trusts that retain investment income, including interest, dividends, capital gains, rents, and royalties, above the threshold owe an additional 3.8% surtax under Internal Revenue Code Section 1411. Unlike individual filers, trusts do not benefit from a higher NIIT threshold. The combination of the top ordinary rate and the NIIT means trusts can face an effective federal rate exceeding 40% on retained income, before any state tax is layered on.
How Trust Income Is Taxed Differently From Individual Income
Understanding why income tax on trusts is so punishing requires a closer look at how the IRS treats trusts as separate taxpaying entities. A nongrantor trust files its own return on Form 1041 and applies its own rate schedule, which is entirely separate from the individual brackets. The trust is a distinct taxpayer with its own identification number and filing obligations.
The compressed bracket structure exists because Congress views trusts as entities that can accumulate income indefinitely. The aggressive rates are designed to discourage long-term income accumulation inside trusts and to encourage distributions to beneficiaries who will pay tax at individual rates. The policy is deliberate, not an accident of drafting.
This rationale also explains why distributing income is such an effective strategy: the tax code is essentially built to reward it. A trustee who understands this dynamic can use it to the trust’s advantage while still honoring the trust’s terms and the grantor’s intentions. The starting point for any planning conversation is matching the trust’s tax structure to the family’s broader goals, which is where coordinated tax advisory services earn their keep.
Three Strategies to Soften the Income Tax Burden on Trusts
Trust tax planning offers several practical ways to reduce the overall tax hit. The three most common approaches involve the type of trust you use, the investments held inside it, and how income is distributed to beneficiaries. Each works in a different way, and the right mix depends on the trust’s purpose and the tax profiles of everyone involved.
Use an Intentionally Defective Grantor Trust
An intentionally defective grantor trust (IDGT) is a powerful tool for estate and trust tax planning. The trust is structured so that you, the grantor, are treated as the owner for income tax purposes, even though your contributions to the trust qualify as completed gifts for estate and gift tax purposes. The “defect” refers only to the income tax treatment under the grantor trust rules in Internal Revenue Code Sections 671 through 679.
This arrangement delivers several advantages. Because the trust’s income is taxed on your personal return, the trust itself pays no income tax. That allows the assets inside the trust to grow without being reduced by annual tax obligations, leaving more wealth for your beneficiaries. It also effectively reduces the size of your taxable estate, since the income taxes you pay on the trust’s behalf are not treated as additional gifts.
As the deemed owner, you can also sell assets to the IDGT or engage in other transactions without triggering capital gains or other income tax consequences. This flexibility makes the intentionally defective grantor trust one of the most versatile tools in modern estate planning.
There is a trade-off. If your personal income already exceeds the top bracket thresholds for your filing status, an IDGT will not avoid the top rates; it simply shifts the tax liability to your individual return. Even so, the estate-planning and tax-free growth benefits often make this strategy attractive for high-income grantors.
Shift to Tax-Efficient Investments Inside Nongrantor Trusts
Grantor trusts are not always the right fit. At some point, you may choose to convert a grantor trust to a nongrantor trust to relieve yourself of the obligation to pay the trust’s taxes out of pocket. Grantor trusts also automatically become nongrantor trusts after the grantor’s death.
For nongrantor trusts that retain income, the investment mix matters significantly. One proven trust tax planning strategy is for the trustee to shift the trust’s portfolio toward tax-exempt investments, such as municipal bonds, or toward tax-deferred investments that postpone recognition of taxable income. Index funds with low turnover can also help minimize the annual capital gains distributions recognized within the trust.
By reducing the amount of taxable income generated each year, trustees can keep the trust’s income below the compressed bracket thresholds and limit or avoid exposure to the 3.8% NIIT. This approach requires the trustee to balance tax efficiency against the trust’s overall investment objectives and the beneficiaries’ need for current income.
Distribute Income to Beneficiaries in Lower Brackets
Nongrantor trusts are generally taxed only on the income they accumulate and retain. When a trust distributes income to a beneficiary, the trust receives a deduction for that distribution, and the income is instead taxed on the beneficiary’s personal return at their marginal rate. This shift is reported to the beneficiary on a Schedule K-1.
This creates a straightforward opportunity. Distributing trust income to beneficiaries who are in lower tax brackets moves the tax burden from the trust’s compressed schedule to the beneficiary’s more favorable individual rates. The trustee can also consider distributing appreciated assets rather than cash, allowing the beneficiary to recognize the capital gain at their own, potentially lower, long-term rate.
This strategy requires careful balancing. Trusts are often created with specific purposes in mind, such as providing incentives for beneficiaries, preserving assets for future generations, or shielding wealth from creditors. Distributing income aggressively to lower the tax bill can undermine these objectives, so trustees should work with tax and legal advisors to find the right balance.
When to Review Your Trust’s Tax Exposure
Tax brackets for trusts and the associated thresholds change with inflation adjustments and periodic tax legislation. A trust that was tax-efficient when it was created may no longer be optimized for current rates. Reviewing the structure on a regular schedule keeps the plan aligned with both the law and the family’s circumstances.
Key moments to reassess include changes in tax law, the death of a grantor that converts a grantor trust to a nongrantor trust, significant changes in the trust’s investment income, and shifts in the beneficiaries’ own tax situations. Trusts that hold operating businesses or real estate deserve particular attention, since the underlying assets often generate the kind of income that drives a trust into the top bracket.
If your estate plan includes one or more trusts, a periodic review with a qualified CPA can uncover opportunities to reduce your family’s overall tax burden. Pairing trust planning with the firm’s broader accounting services helps ensure the trust, the grantor’s return, and the beneficiaries’ returns are all working together rather than at cross purposes.
Frequently Asked Questions
What Are the Current Trust Tax Rates?
Trusts and estates use a compressed four-bracket ordinary rate schedule that reaches the top federal rate of 37% at a threshold far below the individual threshold. The exact figure is adjusted annually for inflation and published by the IRS each year. In addition, trusts owe a 3.8% net investment income tax on retained investment income above the same applicable threshold.
How Can I Reduce Income Tax on a Trust?
Three primary strategies reduce income tax on trusts: using a grantor trust structure so income is taxed on the grantor’s personal return, shifting trust investments to tax-exempt or tax-deferred assets, and distributing income to beneficiaries in lower tax brackets. Each approach has trade-offs that depend on the trust’s purpose and the parties’ individual tax situations. A trust and estate professional can model the options against your specific facts.
What Is an Intentionally Defective Grantor Trust?
An intentionally defective grantor trust (IDGT) is a trust designed so the grantor is treated as the owner for income tax purposes but not for estate and gift tax purposes. The trust’s income flows to the grantor’s personal return, allowing trust assets to grow without being reduced by income taxes. The grantor can also transact with the trust without triggering taxable events.
Do Trusts Pay the Net Investment Income Tax?
Yes. Trusts and estates are subject to the 3.8% net investment income tax on the lesser of their undistributed net investment income or the excess of adjusted gross income over the applicable threshold. Because the trust threshold is so low, most trusts with meaningful investment income will owe this surtax unless they distribute enough income to beneficiaries.
Is It Better to Distribute Trust Income or Retain It?
From a pure tax perspective, distributing trust income to beneficiaries in lower brackets is almost always more tax-efficient because of the trust’s compressed rate schedule. The decision also depends on the trust’s purpose, the beneficiaries’ financial responsibility, creditor protection concerns, and the grantor’s original intent. Trustees should weigh tax savings against these non-tax objectives.
When Does a Grantor Trust Become a Nongrantor Trust?
A grantor trust typically converts to a nongrantor trust upon the grantor’s death. It can also convert during the grantor’s lifetime if the powers that created grantor trust status are released or modified. After conversion, the trust becomes its own taxpayer and is subject to the compressed tax schedule on any retained income.
