How an irrevocable trust works
You transfer assets to a trustee, usually someone other than yourself, and give up the right to take them back. From then on the trust document and the trustee decide how the money is invested and who receives it. Done right, the assets and all their future growth are no longer part of your estate.
That result holds only if you let go completely. The assets come back into your taxable estate if you keep the income from them, the right to use them, or the power to revoke or amend the trust. Giving an existing life insurance policy to a trust and dying within three years also pulls the proceeds back in, which is why an irrevocable life insurance trust often buys the policy itself.
Funding the trust is a gift. The annual gift tax exclusion, $19,000 per recipient in 2026, covers only gifts of a present interest, and gifts to a trust are usually future interests unless each beneficiary gets a short window to withdraw the gift, often called a Crummey power after a 1968 court case. Larger gifts use part of the lifetime exemption, $15,000,000 per person in 2026 and shared with the estate tax, and must be reported on Form 709.
Grantor or non-grantor: who pays the income tax
An irrevocable trust can be taxed in either of two ways, and the drafting decides which.
A non-grantor trust is its own taxpayer. Income it keeps is taxed at compressed trust tax rates that reach 37% above $16,000 of taxable income in 2026, while income it pays out is generally taxed to the beneficiaries, as the trust fund page explains.
An intentionally defective grantor trust is outside your estate for estate tax but still yours for income tax, because the document gives you a power, such as the right to swap in assets of equal value, that triggers the grantor trust rules. You pay the tax on the trust’s income from your own pocket, and the IRS has ruled that doing so is not an extra gift to the beneficiaries. Each tax payment shrinks your estate while the trust grows untaxed.
Basis is the other half of the math. Assets you give away keep your cost basis, and in Rev. Rul. 2023-2 the IRS held that assets in an irrevocable grantor trust that are not included in your estate get no basis adjustment when you die. Heirs inherit the built-in gain instead of a fresh step-up in basis.
Common kinds of irrevocable trusts
Most irrevocable trusts are built for one job, and the table below lists the common ones. A few rules stand out for 2026.
The generation-skipping transfer tax exemption is $15,000,000 per person, which sets how much can go into a dynasty trust for grandchildren and later generations free of that tax. A charitable remainder trust must pay out 5%–50% of its value a year for life or a term of up to 20 years, the charity’s remainder must be worth at least 10% at the start, and the trust itself generally pays no income tax, though unrelated business income draws a 100% excise tax. IRA owners 70½ or older can make a one-time qualified charitable distribution of up to $55,000 to one in 2026.
Special needs trusts come in two forms. A third-party trust, funded by family, can hold any amount for a person with a disability and leave what remains to others; an ABLE account often works alongside it. A first-party trust holding the person’s own money, for someone under 65, must repay the state’s Medicaid costs at death.
Can an irrevocable trust be changed?
Irrevocable means you, the grantor, can’t simply take the assets back or rewrite the terms on your own. It doesn’t always mean frozen for decades. Modern trusts are often drafted with flexibility in mind, and state law adds tools of its own. Whatever the route, a change must respect the trust’s purpose and its tax design: a power that lets you reclaim the assets or their income can pull them back into your taxable estate. Common routes include:
- A trust protector named in the document, who can make limited changes such as replacing a trustee or updating administrative terms.
- Decanting, where state law lets a trustee with discretion pour the assets into a new trust with updated terms.
- A court order modifying or ending the trust, often when circumstances have changed or every beneficiary agrees.
- A power of appointment, which lets a beneficiary redirect who receives the assets after them.
When an irrevocable trust is worth the trade-off
With a federal exemption of $15,000,000 per person in 2026, indexed for inflation from 2027 with no scheduled sunset, and $30,000,000 for a married couple using portability, few families need an irrevocable trust to avoid federal estate tax. For them, giving assets away can backfire, because heirs lose the step-up that would have erased the gain, as the example shows.
The trade-off can still pay for an estate likely to exceed the exemption, a state estate tax with a lower threshold such as Washington’s $3,000,000 exclusion, life insurance that would push an estate over a limit, a beneficiary who needs protection from creditors or their own spending, a disabled beneficiary, charitable goals, or long-range Medicaid planning. Because the decision is hard to reverse, it belongs inside a full estate plan reviewed by an attorney.
Illustrative numbers
Giving $1,000,000 of stock to an irrevocable trust in 2026
Stock given, with no beneficiary withdrawal rights$1,000,000
Lifetime exemption used by the gift$1,000,000
Grantor’s cost basis in the stock$400,000
Value at the grantor’s death$2,500,000
Growth kept out of the taxable estate$1,500,000
Estate tax avoided on that growth at 40%, if the estate is taxable$600,000
Built-in gain heirs inherit, with no step-up$2,100,000
If the estate is above the exemption, the trust avoids $600,000 of federal estate tax, but heirs who sell owe tax on the $2,100,000 gain, up to about $500,000 at the 23.8% top federal rate on long-term gains, so the net saving is far smaller. If the estate is below the exemption, there is no estate tax to save and that gains tax, which a step-up would have erased, is pure cost.
At a glance
Common irrevocable trusts and what each is for
| Trust | Main purpose | Key rule |
|---|---|---|
| Irrevocable life insurance trust (ILIT) | Keep policy proceeds out of the taxable estate | A policy transferred in counts again if the insured dies within 3 years |
| Spousal lifetime access trust (SLAT) | Remove assets while a spouse can still receive distributions | Indirect access usually depends on the marriage lasting |
| Grantor retained annuity trust (GRAT) | Pass on growth above an IRS interest rate with little gift | Works only if the grantor outlives the annuity term |
| Charitable remainder trust (CRT) | Income for life or up to 20 years, then the rest to charity | Pays 5%–50% a year; the charity’s share must be worth at least 10% |
| Special needs trust | Support a person with a disability without losing means-tested benefits | A trust of the person’s own money repays Medicaid at death |
| Dynasty trust | Hold wealth for several generations | $15,000,000 generation-skipping exemption per person in 2026 |
| Medicaid asset protection trust | Shelter savings from long-term care spend-down | Funding within 60 months of applying can trigger a penalty |
Put it in your plan
Irrevocable trust in MoneyWhatIf
MoneyWhatIf does not model irrevocable trusts, gifts into them or the lifetime exemption those gifts use. Its Estate page can still frame the decision: it applies a federal exemption with $15 million and $30 million presets from 2026 law and a 40% rate, charges the estate tax of the state the plan ends in, and lets you switch stepped-up basis off to see what capital-gains tax heirs might face without it. If the page shows no estate tax, a trust aimed only at estate tax may have little to save.
Open your forecastCommon questions
Irrevocable trust FAQs
Can the grantor take money out of an irrevocable trust?
Generally no. The trustee pays only the beneficiaries the document names, on its terms. A grantor who keeps a right to the income or use of the assets pulls them back into the taxable estate and, in most states, leaves them open to the grantor’s creditors. Some designs allow indirect benefit, such as a spousal lifetime access trust that can pay a spouse, but that access usually depends on the marriage lasting.
Can you be the trustee of your own irrevocable trust?
Sometimes, but it often defeats the purpose. The tax code pulls a transfer back into your taxable estate if, at your death, you held a power to alter, amend, revoke or end it, in whatever capacity, so a grantor serving as trustee with discretion over who is paid and when risks losing the estate tax benefit. Creditor and Medicaid protection can suffer too. Most grantors name a relative, friend or trust company and keep only narrow administrative powers the drafting attorney confirms are safe.
Does an irrevocable trust protect assets from nursing home costs?
It can, but the rules are strict. Federal Medicaid law counts any part of a trust that could be paid to you or for your benefit as your own resource, and it reviews transfers into trusts made in the 60 months before you apply. A trust that can’t pay you principal and was funded more than five years earlier is generally outside that test, though state rules vary. Long-term care insurance is the main alternative.
Do assets in an irrevocable trust get a step-up in basis?
Only if they are included in the grantor’s taxable estate, for example because the grantor kept an interest in them. In Rev. Rul. 2023-2, the IRS held that assets in an irrevocable grantor trust that stay outside the estate keep their old basis when the grantor dies. That is why some grantor trusts let the grantor swap cash for low-basis assets before death, so those assets are back in the estate and can step up.