Trusts reduce estate tax by moving assets out of your taxable estate before you die, so the federal 40% estate tax never touches them. Under the One Big Beautiful Bill Act signed on July 4, 2025, each individual can shield $15 million from federal estate and gift tax in 2026, with inflation adjustments starting in 2027.1Office of the Law Revision Counsel. 26 USC 2010 – Unified Credit Against Estate Tax Anything above that threshold is taxed at rates up to 40%, and that is the gap irrevocable trusts are built to close. The price is real: you give up control of the assets permanently, you lose the stepped-up basis at death, and the trust becomes its own taxpayer with its own filings.
Why the Trust Has to Be Irrevocable
A revocable living trust doesn’t reduce estate tax. If you can amend, revoke, or take assets back, the IRS still treats the property as yours. Section 2036 of the tax code pulls back into your gross estate any property where you retained the right to use it, receive income from it, or decide who benefits from it, even if you technically transferred it years ago.2Office of the Law Revision Counsel. 26 USC 2036 – Transfers with Retained Life Estate Serving as your own trustee triggers the same result. The trust only works when you genuinely surrender control to someone else.
The gross estate is broader than probate. It captures real estate, investment accounts, business interests, personal property, retirement accounts, jointly held property, and life insurance you hold any incidents of ownership in.3Office of the Law Revision Counsel. 26 U.S. Code 2031 – Definition of Gross Estate Incidents of ownership on a life insurance policy include the right to change beneficiaries, borrow against the policy, cancel it, or assign it.4eCFR. 26 CFR 20.2042-1 – Proceeds of Life Insurance – Section: Receivable by Other Beneficiaries A $5 million policy that seems separate from your estate is not separate at all if you kept any of those rights.
The estate and gift tax systems share a single $15 million exemption. A $4 million taxable gift into a trust in 2026 drops your remaining estate exemption to $11 million. The generation-skipping transfer tax uses the same $15 million cap and the same 40% rate, so any trust designed to benefit grandchildren has to plan for both.5Congressional Research Service. The Generation-Skipping Transfer Tax
Choosing a Trust Structure by What You Own
Life Insurance: The ILIT
An irrevocable life insurance trust owns a policy on your life and is named as its beneficiary. Because you hold no incidents of ownership, the death benefit stays outside your estate.6Office of the Law Revision Counsel. 26 U.S. Code 2042 – Proceeds of Life Insurance When you die, the trustee collects the proceeds and uses them to give your heirs liquidity for estate taxes, debts, or living costs without forcing a sale of other assets.
Watch the three-year lookback. If you transfer an existing policy to an ILIT and die within three years, the IRS treats the transfer as if it never happened and pulls the full death benefit back into your gross estate.7Office of the Law Revision Counsel. 26 USC 2035 – Adjustments for Certain Gifts Made Within 3 Years of Decedent’s Death Having the ILIT purchase a new policy from the outset avoids the lookback altogether.
Rapidly Appreciating Assets: The GRAT
A grantor retained annuity trust lets you transfer assets while keeping an annuity payment for a fixed number of years. The IRS values the gift to the beneficiaries as the transferred value minus the present value of the annuity stream, calculated using the Section 7520 interest rate.8Office of the Law Revision Counsel. 26 U.S. Code 2702 – Special Valuation Rules in Case of Transfers of Interests in Trusts That rate sits around 4.6% for early 2026.9Internal Revenue Service. Section 7520 Interest Rates
If the assets inside the GRAT grow faster than the 7520 rate, the excess growth passes to your beneficiaries free of gift and estate tax. The annuity payments return the original value plus assumed growth to you, so only the surplus appreciation moves. This works best with pre-IPO stock, concentrated positions expected to spike, or fast-growing business interests. Two risks: if the assets underperform the 7520 rate, nothing transfers; and if you die during the annuity term, some or all of the trust assets come back into your estate.
Your Home: The QPRT
A qualified personal residence trust removes a high-value home from your estate at a discounted gift-tax value. You transfer the home to the trust but keep the right to live there rent-free for a fixed term. Because the beneficiaries don’t receive the property until the term ends, the gift value is discounted, and the longer the term, the larger the discount.
Once the term ends, the home belongs to the beneficiaries and is outside your estate no matter how much it has appreciated. If you want to keep living there, you must pay fair market rent to the trust. Skipping the rent means you retained possession and enjoyment, and the IRS pulls the full value back under IRC 2036.2Office of the Law Revision Counsel. 26 USC 2036 – Transfers with Retained Life Estate Paying rent has an upside: each payment moves more money from you to the trust and further shrinks your taxable estate.
Married Couples Who Still Want Access: The SLAT
A spousal lifetime access trust lets one spouse move assets out of their estate while the other spouse remains a beneficiary. The couple keeps indirect access to the money, and future appreciation stays outside the grantor’s estate.
The main trap is the reciprocal trust doctrine. If both spouses create SLATs for each other, the IRS can “uncross” them and treat each spouse as if they created a trust for themselves, undoing the estate exclusion. Meaningful differences in distribution standards, trustees, beneficiary classes, or funding dates are how planners keep the trusts distinct. Divorce is a separate problem: the grantor spouse loses the indirect access the plan relied on, while the ex-spouse stays a beneficiary.
The Basis Tradeoff Most People Overlook
This is where the biggest hidden cost lives. Assets that pass through your estate at death get a stepped-up basis equal to fair market value on the date of death.10Office of the Law Revision Counsel. 26 USC 1014 – Basis of Property Acquired from a Decedent Stock bought for $100,000 and worth $1 million at death gives your heirs a $1 million basis. Sell it the next day, owe nothing in capital gains.
Assets moved into an irrevocable trust during your lifetime don’t get that step-up. They carry over your original basis.11Office of the Law Revision Counsel. 26 U.S. Code 1015 – Basis of Property Acquired by Gifts and Transfers in Trust Using the same numbers, a trust sale for $1 million produces $900,000 in taxable capital gain and potentially over $200,000 in income tax. The IRS confirmed in Revenue Ruling 2023-2 that assets in an irrevocable grantor trust that aren’t included in the gross estate do not receive a stepped-up basis.
You can’t have both. Either the asset stays in your estate and gets the basis step-up but faces estate tax, or it leaves your estate and keeps the old basis but avoids estate tax. Low-basis, highly appreciated assets sometimes belong in the estate; assets with minimal built-in gain usually belong in the trust. Some trusts include a power of substitution letting the grantor swap high-basis assets like cash into the trust in exchange for low-basis assets that come back to the grantor’s estate and eventually qualify for the step-up.
Using the Annual Exclusion Inside a Trust
You can give up to $19,000 per recipient per year without filing a gift tax return or touching your lifetime exemption.12Internal Revenue Service. Gifts and Inheritances The catch: the annual exclusion only applies to gifts of a “present interest,” meaning the recipient can access the money immediately. A contribution to an irrevocable trust is normally a future interest because beneficiaries can’t touch it until the trustee distributes it.13Internal Revenue Service. Instructions for Form 709
Crummey powers solve this. The trust gives each beneficiary a temporary right to withdraw their share of each new contribution, usually within a 30- to 60-day window. Having the right converts the gift into a present interest even if nobody withdraws. This is how ILITs fund annual premium payments year after year without eating into your lifetime exemption.
Administration is not optional. Each time you contribute, the trustee must send a written notice to every beneficiary stating the withdrawal right, the dollar amount, and the deadline. Sloppy notice records are one of the fastest ways to lose the exclusion. To avoid a separate tax problem when the withdrawal right lapses, most trusts cap it at the greater of $5,000 or 5% of trust principal per beneficiary per year.
Filing a Gift Tax Return When You Fund the Trust
Transferring assets into an irrevocable trust is a taxable gift. If the total to any single beneficiary in a calendar year exceeds $19,000, or if the gift is a future interest of any amount, you must file Form 709.13Internal Revenue Service. Instructions for Form 709 Most trust transfers are future interests unless Crummey powers apply, so a Form 709 is nearly always required when funding one.
The return is due April 15 of the following year, and a personal income tax extension automatically extends Form 709. Married couples who want to split a gift and each apply their own annual exclusion must both consent on the return.
Taxable gifts over the annual exclusion aren’t taxed immediately. They chip away at your $15 million lifetime exemption, and you only owe gift tax out of pocket after you exhaust the exemption. But filing is mandatory regardless, because the IRS uses those returns to track how much exemption you’ve used when calculating estate tax at death.
The Trust Becomes Its Own Taxpayer
An irrevocable trust that isn’t treated as a grantor trust files its own income tax return on Form 1041 whenever it has $600 or more of gross income or any taxable income at all.14Internal Revenue Service. File an Estate Tax Income Tax Return Calendar-year returns are due April 15, with a five-month automatic extension available on Form 7004. The trust needs its own EIN, obtained through Form SS-4, before it can open accounts or file returns.15Internal Revenue Service. Instructions for Form SS-4
Trust income tax brackets are compressed. For 2026, a trust hits the top 37% federal rate on income above roughly $16,000. An individual wouldn’t reach that rate until income ran into the hundreds of thousands. The common workaround is distributing income to beneficiaries instead of accumulating it. Distributed income is generally taxed at the beneficiary’s lower personal rate; the trustee reports the distributions on Schedule K-1, and beneficiaries pick them up on their own returns. How much flexibility the trustee has here depends entirely on the distribution language in the trust document.
Don’t Forget State Estate Taxes
The $15 million federal number isn’t the only threshold that matters. Roughly a dozen states and the District of Columbia impose their own estate taxes, and the exemptions are much lower. The lowest state exemption is $1 million, and several states sit between $2 million and $5 million. State rates typically run from about 10% to 20% above the state exemption.
A married couple with a $10 million estate might owe zero federal estate tax and still face a serious state bill. The same irrevocable trust structures reduce state exposure, but the specific rules depend on where you live and where the trust is established. If your assets exceed $1 million and you live in a state with its own estate tax, plan around the state threshold, not just the federal one.
Getting the Trust Set Up and Funded
The trust document names a trustee who holds legal title and manages the assets according to its terms. That trustee cannot be you; naming yourself pulls the assets back under IRC 2036.2Office of the Law Revision Counsel. 26 USC 2036 – Transfers with Retained Life Estate The trustee can be a trusted individual, a corporate trust company, or both serving together. Professional trustees typically charge 1% to 2% of trust assets annually, scaling with the complexity of the assets and the number of beneficiaries.
Distribution terms are permanent once the trust is irrevocable, so they need to hold up decades into the future. Common approaches include age-based distributions (a third at 25, the balance at 35) or discretionary distributions for health, education, and living expenses. Include provisions for replacing the trustee, handling beneficiary disputes, and protecting assets if a beneficiary faces creditors or divorce.
Every asset going in needs a documented fair market value at the transfer date.3Office of the Law Revision Counsel. 26 U.S. Code 2031 – Definition of Gross Estate Publicly traded securities are easy. Real estate, closely held business interests, and art require a formal appraisal from a qualified professional following the Uniform Standards of Professional Appraisal Practice.16eCFR. 26 CFR 1.170A-17 – Qualified Appraisal and Qualified Appraiser Overvaluation wastes exemption; undervaluation invites audit. Minority interest and marketability discounts for closely held businesses can legitimately reduce the appraised value but draw heavy IRS scrutiny.
Funding is where trusts quietly fail. A signed trust document with no assets in it accomplishes nothing. Real estate needs a new deed transferring title to the trust, signed, notarized, and recorded with the county. Financial accounts must be retitled by providing the institution with the trust agreement and the new EIN. Life insurance requires a change-of-ownership form. Any asset that stays in your name stays in your taxable estate, no matter what the trust says.
Ongoing Administration and Cost
Setting up the trust is the start. The trustee files Form 1041 each year the trust earns more than $600 in gross income.14Internal Revenue Service. File an Estate Tax Income Tax Return If Crummey powers apply, the trustee sends written notices to every beneficiary each time a contribution is made and keeps those notices on file indefinitely, because the IRS can request them years later during an audit.
The trustee also maintains transaction records, distributes income or principal under the trust terms, files state trust returns where required, and invests prudently. For ILITs, the trustee pays the annual premiums from trust funds and confirms the policy stays in force; a missed premium and a lapsed policy defeat the entire purpose.
Legal fees for drafting a complex irrevocable estate tax trust typically run from a few thousand dollars for a straightforward ILIT to $25,000 or more for structures involving multiple entities, business interests, or generation-skipping provisions. Annual accounting and tax preparation add recurring costs on top of trustee compensation. Weigh those numbers against your projected tax savings before committing to a structure you cannot undo.