Yes, a trust earns interest whenever its assets are invested in something that pays it — bank deposits, certificates of deposit, Treasury bills, and bonds all generate interest inside a trust the same way they would in any other account. Interest is only one slice of what a trust can earn: stocks pay dividends, real estate produces rent, and sales of appreciated assets throw off capital gains. What matters most for anyone asking the question is what happens to that income once it’s earned, because the answer depends on the type of trust and can shift the tax bill dramatically.
What Income a Trust Can Earn
The assets placed into a trust form its principal, sometimes called the corpus. That principal is meant to be invested, and the mix of income it produces depends entirely on how the trustee invests it. A trust holding mostly bonds and CDs will earn interest. One concentrated in equities will earn dividends and capital gains. A trust that owns rental property earns rent. Most well-managed trusts hold a diversified portfolio that produces some combination of all these income types.
Interest earned inside a trust does not disappear into a separate universe. It is real income, reportable to the IRS, and someone has to pay tax on it. The question is who.
Who Pays Tax on Trust Interest
The first fork in the road is whether the trust is a grantor trust or a non-grantor trust. The distinction changes the answer completely.
Grantor Trusts
The most common trust in estate planning is the revocable living trust, and it is a grantor trust. When the person who created the trust retains certain powers over it, including the power to revoke it, federal tax law treats all trust income as the grantor’s personal income.1Office of the Law Revision Counsel. 26 USC 671 – Trust Income, Deductions, and Credits Attributable to Grantors and Others as Substantial Owners Interest, dividends, and capital gains earned inside the trust all get reported on the grantor’s Form 1040. There is no separate trust return during the grantor’s lifetime, and the IRS even allows the trustee to use the grantor’s Social Security number for the trust’s investment accounts.2Internal Revenue Service. Instructions for Form 1041 and Schedules A, B, G, J, and K-1 (2025)
A revocable trust stays a grantor trust until the grantor dies, gives up the power to revoke, or amends the trust to remove the triggering powers. At death, the trust typically becomes irrevocable and converts to a non-grantor trust. That is when the mechanics below take over.
Non-Grantor Trusts
Once a trust is no longer a grantor trust, it becomes its own taxpayer. It files IRS Form 1041 each year and reports the interest and other income it earned.3Internal Revenue Service. About Form 1041, U.S. Income Tax Return for Estates and Trusts From there, the tax burden gets split based on what happens to the income: distributed income is generally taxed to the beneficiaries who receive it, and retained income is taxed to the trust.
How Distributed Interest Reaches the Beneficiary’s Return
Non-grantor trusts operate on a pass-through concept designed to avoid taxing the same dollar twice. The trust calculates a figure called Distributable Net Income, or DNI. DNI is essentially the trust’s taxable income with certain adjustments, including the exclusion of capital gains that are allocated to principal and not distributed.4Office of the Law Revision Counsel. 26 USC 643 – Definitions Applicable to Subparts A, B, C, and D
DNI acts as a ceiling. The trust can deduct distributions to beneficiaries, but only up to the DNI amount. That deduction shifts the tax burden from the trust to the beneficiaries. Each beneficiary who receives a distribution gets a Schedule K-1 from the trust showing their share of income, deductions, and credits, and they use it to complete their Form 1040.5Internal Revenue Service. Instructions for Schedule K-1 (Form 1041) for a Beneficiary Filing Form 1040 or 1040-SR Interest that flows out to a beneficiary keeps its character as interest on the K-1 and gets taxed at that beneficiary’s individual rate.
Why Trustees Push Income Out Rather Than Hold It
Income the trust retains and does not distribute gets taxed at the trust’s own rates, and this is where the arithmetic turns painful. For 2026, the federal income tax brackets for estates and trusts are:6Internal Revenue Service. Rev. Proc. 2025-32
- 10% on taxable income up to $3,300
- 24% on $3,301 to $11,700
- 35% on $11,701 to $16,000
- 37% on income over $16,000
Individual taxpayers filing single do not reach the 37% bracket until taxable income exceeds roughly $626,000. A trust hits the same top rate at $16,000. This compression is the single most important tax fact about trust income, and it is why competent trustees actively distribute income to beneficiaries in lower brackets rather than letting it pile up inside the trust.
On top of the regular income tax, trusts that hold onto investment income face the 3.8% Net Investment Income Tax. For trusts, the NIIT kicks in once adjusted gross income exceeds the dollar amount where the highest regular tax bracket begins, which for 2026 is $16,000.7Office of the Law Revision Counsel. 26 USC 1411 – Imposition of Tax The tax applies to the lesser of the trust’s undistributed net investment income or the excess of AGI over that threshold.8Internal Revenue Service. Questions and Answers on the Net Investment Income Tax Combined with the 37% top bracket, retained trust income can face an effective federal rate of 40.8%, before any state tax.
Simple Trusts vs. Complex Trusts
Whether the trustee even has a choice about distributing income depends on which category the trust falls into.
A simple trust must meet three conditions every tax year: the trust document requires all accounting income to be distributed to beneficiaries currently, no distributions of principal are made during the year, and no charitable contributions are made.9Office of the Law Revision Counsel. 26 USC 651 – Deduction for Trusts Distributing Current Income Only If any one of those conditions is broken in a given year, the trust is treated as complex for that year. Because a simple trust must distribute all income, that income is generally taxed to the beneficiaries at their personal rates, and the trust gets a deduction for the amount distributed.
A complex trust is any non-grantor trust that does not qualify as simple. The trustee can accumulate income rather than pushing it all out, can distribute principal, and can make charitable contributions.10Office of the Law Revision Counsel. 26 USC 661 – Deduction for Estates and Trusts Accumulating Income or Distributing Corpus Any income the trust holds back gets taxed at the compressed rates above.
Interest, Principal, and Who Gets What
Trust accounting draws a hard line between income and principal. Interest and dividends are income. The underlying asset base is principal. This matters because most trust documents give current beneficiaries the right to income while reserving the principal for remainder beneficiaries who inherit later. So when a bond inside the trust pays interest, that cash generally belongs to the income beneficiary under the terms of a typical trust document.
Capital gains are the odd category. Under the default rules of the uniform state laws governing trust accounting, proceeds from selling an asset are generally allocated to principal, not income. The current income beneficiary usually does not receive capital gains from asset sales unless the trust document says otherwise. The trust instrument can override these defaults and direct capital gains to income, but most do not.
Filing and Payment Deadlines the Trustee Has to Meet
Non-grantor trusts that earn income must file Form 1041. For calendar-year trusts, the return is due April 15 of the following year. The trustee can request an automatic 5½-month extension by filing Form 7004, which pushes the filing deadline to September 30, though the extension does not extend the time to pay any tax owed.2Internal Revenue Service. Instructions for Form 1041 and Schedules A, B, G, J, and K-1 (2025)
A trust that expects to owe at least $1,000 in tax for the year after subtracting withholding and credits must make quarterly estimated tax payments. The 2026 quarterly deadlines are April 15, June 15, September 15, and January 15, 2027.11Internal Revenue Service. Form 1041-ES, Estimated Income Tax for Estates and Trusts Missing them triggers an underpayment penalty calculated on the amount underpaid, the length of the underpayment, and the IRS’s published quarterly interest rate.12Internal Revenue Service. Underpayment of Estimated Tax by Individuals Penalty The trust can avoid the penalty by paying at least 90% of its current-year tax liability, or 100% of the prior year’s tax (110% if the trust’s adjusted gross income exceeded $150,000 in the prior year).
One Boundary: SSI Beneficiaries
Distributing trust interest is not always tax-neutral for the beneficiary’s other benefits. If the beneficiary receives Supplemental Security Income, cash paid from the trust directly to the beneficiary reduces the SSI benefit dollar for dollar. Money paid to a third party for shelter on the beneficiary’s behalf also reduces benefits, capped at $342.33 per month as of 2025. Payments to third parties for other expenses such as medical care, phone bills, or education do not reduce SSI at all, and as of late 2024 the SSA no longer counts food provided by a third party as in-kind support and maintenance.13Social Security Administration. SSI Spotlight on Trusts Families with an SSI recipient in the picture often use a special needs trust designed to hold and distribute assets without jeopardizing benefits, and the structure of those trusts should be handled by an attorney who specializes in them.