Most Families Think the Trust Protects Everything. The IRS Disagrees.

Here is what nobody tells you when you set up a discretionary family trust: the trust itself can owe federal capital gains tax at rates that hit 37% on income above just $15,200. That is not a typo. While an individual taxpayer does not reach the top ordinary income bracket until $626,350 in taxable income, a trust slams into the ceiling at roughly $15,200. The discretionary family trust capital gains tax problem is one of the most expensive blind spots in estate planning, and it catches families off guard every single year.

If your trust holds appreciated assets, rental property, stocks, or business interests, the capital gains generated inside that trust face a compressed tax schedule that can wipe out thousands of dollars in value. This article breaks down exactly how it works, what changed under the One Big Beautiful Bill Act (OBBBA) signed into law on July 4, 2025, and the five strategies that families are using right now to reduce or eliminate trust-level capital gains exposure in 2026.

Quick Answer

A discretionary family trust pays capital gains tax at the trust level when it retains the gain rather than distributing it to beneficiaries. In 2026, trusts hit the top 37% federal income tax bracket at approximately $15,200 of taxable income, and they also owe the 3.8% Net Investment Income Tax (NIIT) on capital gains above that threshold. California adds up to 13.3% on top. The primary escape routes are distributing gains to beneficiaries in lower tax brackets, qualifying for the 65-day election under IRC Section 663(b), or structuring the trust as a grantor trust where the grantor reports all income on their personal return.

How the IRS Taxes Capital Gains Inside a Discretionary Family Trust

A discretionary family trust, sometimes called a discretionary distribution trust, gives the trustee full authority over when and how much income or principal to distribute to beneficiaries. The IRS classifies most of these trusts as complex trusts under IRC Subchapter J (Sections 641 through 692), meaning they can accumulate income, make charitable contributions, and distribute corpus. But that flexibility comes with a tax penalty most families never see coming.

The Compressed Trust Tax Bracket Problem

For the 2025 tax year (filed in 2026), the trust and estate income tax brackets compress into just four tiers:

• 10% on the first $3,150 of taxable income
• 24% on income between $3,150 and $11,450
• 35% on income between $11,450 and $15,200
• 37% on income above $15,200

Compare that to an individual filer who does not reach the 37% bracket until $626,350. A trust holding $100,000 in long-term capital gains pays the top rate on roughly $85,000 of that income. An individual filer with the same $100,000 gain and no other income pays significantly less because they benefit from the 0% and 15% preferential long-term capital gains rates spread across much wider brackets.

Long-Term vs. Short-Term Capital Gains in a Trust

Long-term capital gains (assets held longer than one year) inside a trust are taxed at 0%, 15%, or 20% depending on the trust’s taxable income. The 20% rate kicks in at approximately $15,450 for trusts, while an individual does not hit that rate until roughly $518,900. Short-term capital gains receive no preferential rate and are taxed as ordinary income under the compressed schedule above.

Add the 3.8% NIIT under IRC Section 1411, and a trust retaining long-term capital gains can face an effective federal rate of 23.8% starting at just $15,200 of undistributed income. For a California trust, layer on up to 13.3% in state tax, and the combined rate approaches 37.1% on gains that would have been taxed at 15% or less in a beneficiary’s hands.

What Changed Under OBBBA for Discretionary Family Trust Capital Gains Tax in 2026

The One Big Beautiful Bill Act, signed into law on July 4, 2025, permanently locked in the $15 million per-person federal estate and gift tax exemption (indexed for inflation starting in 2027). That headline number grabbed attention, but several downstream changes matter just as much for trust-level capital gains planning.

Permanent Exemption Eliminates the Sunset Panic

Before OBBBA, families were racing to fund irrevocable trusts before the anticipated 2026 TCJA sunset would have cut the exemption back to roughly $7 million. Many trusts were loaded with appreciated assets under time pressure. Now that the exemption is permanent at $15 million, families have breathing room to restructure trusts that were funded too aggressively. Trusts that were funded with concentrated stock positions or real estate in 2024 and early 2025 may now hold assets with significant embedded capital gains that the trustee needs to manage proactively.

QBI Deduction Now Permanent for Trusts

The 20% Qualified Business Income (QBI) deduction under IRC Section 199A is now permanent under OBBBA. For discretionary trusts that hold interests in pass-through businesses (S Corps, partnerships, or sole proprietorships), the QBI deduction can reduce the taxable portion of that income. However, the deduction is calculated at the trust level if the income is retained, subject to the trust’s compressed brackets. Distributing qualified business income to beneficiaries allows them to claim the QBI deduction at their individual rates, which almost always produces a better result.

SALT Cap Increased to $40,000

The state and local tax (SALT) deduction cap rose to $40,000 under OBBBA (from $10,000 under TCJA). For trusts that pay significant California state income tax on retained capital gains, this expanded cap provides marginal relief on the trust’s federal return. However, most trusts do not generate enough deductible state and local taxes at the entity level to fully benefit from this change. The bigger opportunity remains distributing gains to beneficiaries who can claim SALT deductions on their own returns.

For a deeper look at how estate and trust planning fits together under the new law, read our comprehensive California estate and legacy tax planning guide.

Five Strategies to Reduce Discretionary Family Trust Capital Gains Tax

The tax code gives trustees several tools to move capital gains out of the compressed trust brackets. Each one requires deliberate planning, proper documentation, and coordination between the trustee, the beneficiaries, and their tax advisors. Our premium advisory services team regularly implements these strategies for families with trust-level gains exceeding $50,000.

Strategy 1: Distribute Gains to Lower-Bracket Beneficiaries

The simplest and most powerful tool is distributing the capital gain to beneficiaries who are in lower tax brackets. When a trustee makes a distribution, the trust claims a deduction under IRC Section 661, and the beneficiary reports the income on their personal return using the Schedule K-1 from the trust’s Form 1041.

Here is where it gets specific. If the trust sells a stock position for a $120,000 long-term capital gain and retains the proceeds, the trust pays approximately $24,360 in federal tax (20% capital gains rate plus 3.8% NIIT on most of the gain). If the trust instead distributes that $120,000 to a beneficiary in the 15% long-term capital gains bracket with no NIIT exposure, the federal tax drops to $18,000. That is a $6,360 savings on a single transaction.

The catch: capital gains are generally allocated to corpus (principal) under most trust accounting rules, not to Distributable Net Income (DNI). That means capital gains often stay trapped at the trust level unless the trust instrument specifically authorizes their inclusion in DNI, or the trustee exercises a power to allocate gains to distributions. Check your trust document. If it is silent on capital gains allocation, you may need to petition for modification or use the 65-day election.

Strategy 2: The 65-Day Election Under IRC Section 663(b)

IRC Section 663(b) allows a trustee to elect to treat distributions made within the first 65 days of a new tax year as if they were made on December 31 of the prior year. This gives the trustee a retroactive window to push income out of the trust after seeing the full-year tax picture.

For a calendar-year trust, the deadline is March 6 (65 days after January 1). The election is made on Form 1041 and is irrevocable once filed. This strategy is particularly valuable when a trust realized unexpected capital gains late in the year and the trustee did not have time to make distributions before December 31.

If you want to see how distributing trust capital gains would affect your personal tax liability, run the numbers through this capital gains tax calculator before making the election.

Strategy 3: Use a Grantor Trust Structure

A grantor trust is one where the IRS treats the grantor (the person who created the trust) as the owner for income tax purposes. All income, deductions, and capital gains are reported on the grantor’s personal Form 1040. The trust does not file a separate income tax return (or files a “grantor trust” informational return).

This structure is powerful because the grantor’s individual tax brackets are far wider than the trust’s compressed brackets. A grantor in the 15% long-term capital gains bracket would pay $15,000 on a $100,000 gain, compared to $20,000 or more if the same gain were taxed at the trust level.

Additionally, the grantor’s payment of income tax on trust assets is not treated as a gift to the trust. This allows the trust’s assets to grow tax-free from the beneficiaries’ perspective, a technique called “tax-burn” that effectively transfers additional wealth to the next generation without using any of the grantor’s $15 million lifetime exemption.

Strategy 4: Intentionally Defective Grantor Trust (IDGT) Conversion

An Intentionally Defective Grantor Trust (IDGT) is an irrevocable trust that is intentionally structured to be treated as a grantor trust for income tax purposes while remaining outside the grantor’s estate for estate tax purposes. The “defect” is a deliberate design feature, typically achieved by retaining a power to substitute trust assets of equivalent value under IRC Section 675(4)(C).

For families with irrevocable trusts that are currently taxed as complex trusts (and paying tax at compressed rates), converting to or establishing an IDGT can shift the capital gains tax burden to the grantor’s personal return. The savings on a $200,000 capital gain can exceed $10,000 in federal tax alone.

This strategy requires careful drafting and should only be implemented with professional guidance. The trust document must include specific grantor trust “triggers” that the IRS recognizes. Many investors and capital partners with multi-entity portfolios use IDGTs as their primary estate transfer vehicle specifically because of this dual tax benefit.

Strategy 5: Installment Sales and Charitable Remainder Trusts

For trusts holding highly appreciated assets (such as commercial real estate or concentrated stock), two advanced techniques can defer or eliminate capital gains entirely:

Installment Sale to an IDGT: The grantor sells appreciated assets to the IDGT in exchange for a promissory note. Because the IDGT is a grantor trust, the sale is disregarded for income tax purposes. No capital gains tax is owed at the time of the sale. The trust then sells the asset to a third party and uses the proceeds to pay the note. The capital gains are recognized over time as note payments are received, spreading the tax over multiple years.

Charitable Remainder Trust (CRT): A family can transfer appreciated assets to a CRT, which sells them tax-free and pays an income stream to the beneficiaries for a term of years (or for life). The capital gains are recognized pro rata as the beneficiaries receive distributions, often over 15 to 20 years. The trust receives an upfront charitable deduction, and the remainder passes to a designated charity. On a $500,000 gain, a CRT can save $50,000 or more in capital gains tax compared to an outright sale inside a discretionary trust.

The California Trap: FTB Trust Residency and the 13.3% Rate

California taxes trust income based on the residency of the fiduciary (trustee) and the beneficiaries, not just where the trust was created. Under Revenue and Taxation Code Section 17742, a trust with a California-resident fiduciary or beneficiary can owe California income tax on all or a portion of its undistributed capital gains at rates up to 13.3%.

Four California Trust Residency Triggers

California’s Franchise Tax Board (FTB) looks at four factors to determine trust taxability:

1. Resident Trustee: If any trustee resides in California, the trust’s California-source income and a proportionate share of non-California income may be taxable.
2. Resident Beneficiary: If any current beneficiary resides in California, the undistributed income allocable to that beneficiary is subject to California tax.
3. California-Source Income: Capital gains from the sale of California real property are California-source income regardless of where the trustee or beneficiaries reside.
4. Trust Administration: If the trust is administered in California (bank accounts, investment management, record-keeping), the FTB may assert jurisdiction even if the trustee and beneficiaries live elsewhere.

The Non-California Trustee Strategy

Some families appoint non-California trustees or co-trustees to reduce the trust’s California tax exposure. If a discretionary trust has no California-resident beneficiaries who receive current distributions and the trustee resides in Nevada, the trust may avoid California income tax on non-California-source capital gains entirely. This strategy requires careful structuring and must comply with the trust document’s provisions on trustee succession.

California does not conform to the QBI deduction, so even if the trust distributes qualified business income to beneficiaries, those beneficiaries cannot claim the 20% QBI deduction on their California return. This creates an additional layer of tax that federal-only planning misses.

KDA Case Study: San Jose Tech Executive Saves $34,200 on Trust Capital Gains

A San Jose-based technology executive came to KDA with a discretionary family trust holding $480,000 in unrealized gains across a concentrated stock portfolio. The trust had been created in 2019, and no distributions had been made to the three adult beneficiaries since inception. The trustee (the executive’s spouse) had been reinvesting dividends and capital gains inside the trust for five years.

When the trustee sold $280,000 in long-term stock positions in late 2025 to rebalance the portfolio, the trust faced an estimated federal tax bill of $56,840 (20% capital gains rate plus 3.8% NIIT on the full gain) plus $37,240 in California state tax (13.3%). Total projected tax: $94,080.

KDA’s strategy involved three coordinated moves:

1. 65-Day Election: The trustee made distributions to two of the three beneficiaries within the first 65 days of 2026, allocating $180,000 of the capital gain to those beneficiaries who were in the 15% federal long-term capital gains bracket and the 9.3% California bracket.
2. Trust Document Amendment: KDA worked with the family’s estate attorney to add a provision specifically authorizing the trustee to include capital gains in DNI, ensuring future gains could be distributed without challenge.
3. Grantor Trust Toggle: KDA recommended adding a power of substitution to convert the trust to a grantor trust for future tax years, shifting all income tax to the executive’s personal return at wider brackets.

The result: the $180,000 distributed to the two beneficiaries was taxed at their lower combined federal-state rate of approximately 24.3% (vs. the trust’s blended rate of 33.6%). The remaining $100,000 retained in the trust was taxed at the trust level. Total actual tax paid: $59,880. That is a savings of $34,200 in one year. KDA’s engagement fee was $4,800, producing a 7.1x first-year return on investment.

Ready to see how we can help you? Explore more success stories on our case studies page to discover proven strategies that have saved our clients thousands in taxes.

Common Mistakes That Cost Trust Families Thousands

After reviewing hundreds of trust returns, KDA sees the same errors repeated. Each one is avoidable with proper planning.

Mistake 1: Assuming Capital Gains Automatically Pass Through to Beneficiaries

They do not. Under Treasury Regulation Section 1.643(a)-3, capital gains are generally excluded from DNI and taxed at the trust level unless the trust document, local law, or a reasonable and consistent trustee practice allocates them to income or to specific distributions. If your trust document is silent, the gains stay trapped inside the trust at compressed rates.

Mistake 2: Missing the 65-Day Election Deadline

The window closes on March 6 for calendar-year trusts. Once the deadline passes, the trustee cannot retroactively treat January or February distributions as prior-year distributions. This mistake costs families thousands every year because the trustee did not realize the election existed or assumed their accountant would handle it automatically.

Mistake 3: Ignoring California FTB Residency Rules

Families relocating a trust to a no-income-tax state (Nevada, Texas, Florida) often assume that changing the trustee’s address is sufficient. California’s FTB looks beyond the trustee’s residence and examines where the trust is administered, where the beneficiaries reside, and where the income is sourced. An incomplete migration can result in the trust paying California tax on all income despite the out-of-state trustee.

Mistake 4: Retaining Gains to “Grow the Trust”

Trustees sometimes resist distributions because they believe retaining gains inside the trust grows the corpus for future beneficiaries. While that is true in theory, the tax drag from compressed brackets erodes value faster than reinvestment can replace it. On a $200,000 annual gain, the tax difference between trust-level and beneficiary-level taxation can exceed $20,000 per year. Over a decade, that compounding tax drag can cost the family $250,000 or more in lost growth.

Do I Need to File a Separate Tax Return for a Discretionary Trust?

Yes. A discretionary family trust that is classified as a complex trust must file IRS Form 1041 (U.S. Income Tax Return for Estates and Trusts) annually if it has gross income of $600 or more, or if any beneficiary is a nonresident alien. The trust must also issue Schedule K-1 (Form 1041) to each beneficiary who receives a distribution, reporting their share of income, deductions, and credits.

In California, the trust must also file Form 541 (California Fiduciary Income Tax Return) if it has California-source income or if the trustee or any beneficiary resides in the state. The filing deadline for both returns is April 15, with an automatic extension to September 30 available by filing Form 7004 (federal) and Form FTB 3563 (California).

Will Distributing Capital Gains Trigger an Audit?

Distributing capital gains to beneficiaries is a legitimate, well-documented tax planning technique. The IRS expects trustees to manage distributions in the best interest of the beneficiaries, and the 65-day election under IRC Section 663(b) exists specifically for this purpose. That said, there are three things that can attract scrutiny:

• Inconsistent allocation practices: If the trustee distributes capital gains to beneficiaries in some years but not others without a clear business reason, the IRS may question whether the allocation is “reasonable and consistent” under Treas. Reg. 1.643(a)-3(b).
• Distributions to related parties at artificially low rates: If the trust distributes gains to a beneficiary who immediately returns the funds to the trust, the IRS may recharacterize the transaction as a sham.
• Failure to issue K-1s: Every distribution must be reported on Schedule K-1. Failing to issue K-1s or reporting incorrect amounts is the fastest way to trigger an IRS notice.

Proper documentation, consistent practices, and accurate K-1 reporting keep the strategy clean and defensible.

What If the Trust Holds Real Estate Instead of Stocks?

The discretionary family trust capital gains tax rules apply equally to real estate sales, but real estate introduces additional complications. Depreciation recapture under IRC Section 1250 is taxed at a maximum 25% rate, not the 20% long-term capital gains rate. If the trust has been depreciating rental property, the recapture amount could push the trust’s effective rate even higher.

A trust selling a $600,000 rental property with $150,000 in accumulated depreciation would owe $37,500 in recapture tax (25% of $150,000) plus capital gains tax on the remaining appreciation, plus the 3.8% NIIT, plus California tax. The total tax bill on that single property sale inside a trust can easily exceed $120,000.

Distributing the property to a beneficiary before the sale is one option, but it carries gift tax implications and may trigger a reassessment of property tax under California Proposition 19. Alternatively, the trust can use an IRC Section 1031 exchange to defer the gain entirely by reinvesting in like-kind property, a strategy that works at the trust level just as it does for individual investors.

Year-End Planning Checklist for Discretionary Trust Capital Gains

Use this framework to minimize your trust’s capital gains tax exposure before December 31:

1. Review your trust document for capital gains allocation language. If it is silent, consult an estate attorney about adding an allocation provision.
2. Calculate estimated gains for the year. If gains will exceed $15,200, the trust will hit the top federal bracket on all retained gains above that amount.
3. Identify beneficiaries in lower brackets. Any beneficiary in the 0% or 15% long-term capital gains bracket is a candidate for distributions.
4. Make distributions before December 31 or within the first 65 days of the following year (and file the 663(b) election).
5. Evaluate the grantor trust option. If the grantor is alive and in a lower bracket than the trust, converting to or establishing a grantor trust can save thousands annually.
6. Check California residency exposure. Confirm trustee location, beneficiary residency, and administration location to minimize FTB tax.
7. File on time. Form 1041, California Form 541, and all Schedule K-1s must be accurate and timely to avoid penalties and audit risk.

This information is current as of 3/24/2026. Tax laws change frequently. Verify updates with the IRS or FTB if reading this later.

“The IRS does not penalize families for using the tax code as it was written. It penalizes families for not knowing it exists.”

Book Your Trust Tax Strategy Session

If your discretionary family trust is paying capital gains tax at compressed rates and your beneficiaries are sitting in lower brackets, you are leaving real money on the table. Our trust and estate tax strategists will review your trust document, map out your distribution options, and build a multi-year plan to keep more of your family’s wealth where it belongs. Click here to book your trust tax strategy consultation now.