How a Trust Reduces Estate Taxes and When It Doesn’t

A trust reduces estate taxes by moving assets out of your legal ownership before you die, so they aren’t counted when the IRS calculates what your estate owes. This only works with an irrevocable trust. The federal estate tax exemption for 2026 is $15 million per individual, and anything above that threshold is taxed at rates up to 40 percent.¹ A properly structured irrevocable trust removes both the transferred assets and their future appreciation from that calculation. A revocable trust, by contrast, does nothing for estate taxes at all.

Why a Revocable Living Trust Does Not Reduce Estate Taxes

This is the most common misunderstanding in estate planning. Because you keep the power to change, revoke, or take back assets in a revocable trust, the IRS treats everything inside it as still yours. Federal law specifically includes the value of any property you transferred if you kept the ability to alter or revoke the arrangement.²

Revocable trusts still have real uses. They avoid probate, provide management if you become incapacitated, and keep asset details out of public records. For estate tax reduction, though, only irrevocable structures move the needle.

How an Irrevocable Trust Removes Assets from Your Estate

An irrevocable trust is a separate legal entity that owns property independently of you. When you transfer assets in, you give up the right to reclaim them, change how they’re distributed, or benefit from the income they produce. That complete surrender of control is what makes the tax benefit work.

Two provisions of federal law will pull the assets right back into your taxable estate if you retain even limited powers. The first targets any transfer where you kept the right to income from the property or the ability to decide who enjoys it.³ The second covers any transfer where you kept the power to change, modify, or cancel the arrangement.² Between them, they mean the trust document has to be airtight. If the IRS can point to any retained control, the assets count as yours at death and the strategy fails.

Trustee choice matters here. If you serve as your own trustee and hold discretionary power over distributions, the IRS may argue you’ve kept control. Most planners recommend an independent trustee, or at a minimum a trustee whose powers are bounded by clear standards rather than open-ended discretion.

Funding a Trust with Annual Exclusion Gifts

You can move assets into an irrevocable trust during your lifetime using the annual gift tax exclusion, which is $19,000 per recipient for 2026.⁴ Married couples who elect to split gifts can give $38,000 per recipient without touching their lifetime exemption. Over twenty years, a couple gifting to four trust beneficiaries could shift more than $3 million out of their combined estates using annual exclusions alone.

There’s a catch. Gifts to a trust are normally treated as “future interest” gifts, because the beneficiaries can’t use the money immediately, and future interest gifts don’t qualify for the annual exclusion.⁵ Most irrevocable trusts solve this with a Crummey withdrawal right, named for the court case that established it. Each time you contribute money, every beneficiary gets a short window to withdraw their share. Because they could take the money right then, the gift counts as a present interest and qualifies for the exclusion. In practice, beneficiaries almost never withdraw.

Any gift above $19,000 to a single recipient, or any future-interest gift regardless of amount, requires a gift tax return on Form 709.⁶ Filing doesn’t mean you owe tax. It tracks how much of your lifetime exemption you’ve used. If you’re married and splitting gifts, both spouses must file regardless of amount.

Keeping Life Insurance Out of Your Estate

Life insurance death benefits are included in your gross estate if you held any ownership rights over the policy when you died. Those rights include the ability to change beneficiaries, borrow against the cash value, or surrender the policy.⁷ A $5 million death benefit can easily push an otherwise-exempt estate over the $15 million threshold.

An Irrevocable Life Insurance Trust (ILIT) solves this by owning the policy from the start. The trust applies for the policy, owns it, and is named as the beneficiary. You contribute cash to the trust each year, using annual exclusion gifts with Crummey rights, and the trustee pays the premiums. Because you never held ownership rights, the death benefit stays out of your estate.

The Three-Year Lookback

If you already own a policy and transfer it into an ILIT, a special rule applies. Federal law pulls the death benefit back into your estate if you transferred the policy within three years of death.⁸ Life insurance transfers get no exception for small gifts. If you die inside that window, the entire death benefit is taxed as though you still owned the policy. That’s why planners strongly prefer having the trust buy a new policy rather than transferring an existing one.

Freezing Future Growth with GRATs and IDGTs

The most powerful estate tax strategies target future appreciation rather than current value. A Grantor Retained Annuity Trust (GRAT) works this way: you transfer assets in and retain the right to fixed annual payments for a set number of years. Whatever remains at the end goes to your beneficiaries. Federal law values your retained annuity using IRS-published interest rates, and only the excess counts as a taxable gift.⁹

Most planners design “zeroed-out” GRATs, where the annuity payments equal the full value of what you transferred, producing a taxable gift of essentially zero. If the trust assets grow faster than the IRS assumed rate, the excess passes to your beneficiaries free of estate and gift tax. If $2 million placed in a two-year GRAT grows to $3 million, the $1 million gain transfers tax-free after your annuity payments come back.

GRATs have one big vulnerability. You must survive the full annuity term. Die early, and the remaining trust assets get pulled back into your taxable estate, wiping out the benefit. Practitioners typically use short terms of two or three years and roll the proceeds into new GRATs.

An Intentionally Defective Grantor Trust (IDGT) takes a different approach. You sell assets to the trust in exchange for a promissory note bearing interest at the minimum IRS rate. Because the trust is treated as “you” for income tax purposes, the sale doesn’t trigger capital gains tax. Any growth beyond the note’s interest rate passes to beneficiaries outside your estate. While the grantor trust is active, you pay the income tax on trust earnings out of your own pocket, which further shrinks your taxable estate without counting as additional gifts.

The Step-Up in Basis Trade-Off

Removing assets from your taxable estate can cost your heirs money on the income tax side. When you die owning appreciated property, your heirs receive it with a tax basis equal to its fair market value at death, which effectively erases every dollar of capital gain that built up during your lifetime.¹⁰

Assets you’ve already given to an irrevocable trust generally don’t get this step-up, because they aren’t in your taxable estate. The IRS confirmed this in Revenue Ruling 2023-2 for completed gifts to irrevocable grantor trusts. If you bought stock for $100,000 and it’s worth $2 million when your heirs sell, they’ll owe capital gains tax on $1.9 million. Had you kept it in your own name, the basis would have reset to $2 million at your death and your heirs would owe nothing on the appreciation.

The math matters most for estates close to the exemption. If your estate is $16 million, saving estate tax on a $1 million asset in a trust might cost your heirs more in capital gains than it saves. For very large estates where 40 percent estate tax dwarfs the capital gains rate, the trust still wins. Run the numbers before committing.

Marital, Charitable, and Portability Strategies

The Marital Deduction and QTIP Trusts

Federal law allows an unlimited deduction for property passing to a surviving spouse, deferring estate tax until the second death.¹¹ A Qualified Terminable Interest Property (QTIP) trust uses this deduction while letting the first spouse dictate the final beneficiaries. The surviving spouse receives income for life, but the first spouse’s estate plan controls where the assets go after. QTIPs are common in blended families where the first spouse wants to provide for the survivor without risking the assets being redirected away from children of a prior marriage.

The executor makes the QTIP election on the estate tax return, and once made, it’s irrevocable. Assets in a QTIP trust are then included in the surviving spouse’s estate at their death, so the tax isn’t eliminated but postponed. Postponement is valuable: the surviving spouse’s own $15 million exemption shelters those assets again, and decades of additional planning become possible.

Portability of the Unused Exemption

Even without a trust, a surviving spouse can inherit any portion of the deceased spouse’s $15 million exemption that wasn’t used. This “deceased spousal unused exclusion” can give the survivor an effective exemption of up to $30 million.¹² The executor of the first spouse’s estate has to affirmatively elect portability on Form 706, even if the estate owes no tax. Miss the filing and the unused exemption disappears. The deadline is generally nine months after death with a six-month extension available, and the IRS has allowed a late portability election if filed within five years of the death.

Charitable Remainder and Charitable Lead Trusts

Charitable trusts split the benefit between your family and a qualifying nonprofit. A Charitable Remainder Trust pays income to you or your family for a term of years or for life, then distributes the remainder to charity. A Charitable Lead Trust does the reverse: the charity gets payments first, and your family receives what’s left at the end.¹³

Both generate a deduction based on the present value of the charitable portion, which lowers the gross estate. A Charitable Lead Trust can be especially useful for transferring appreciating assets, because growth above the IRS assumed rate passes to family at a reduced transfer tax cost. The charitable deduction can also pull a large estate below the $15 million exemption threshold entirely.

Generation-Skipping Transfers to Grandchildren

Trusts benefiting grandchildren or later generations face a separate layer of taxation. The generation-skipping transfer (GST) tax exists to stop wealthy families from using trusts to skip the estate tax at each generation. The GST rate is a flat 40 percent, applied on top of any estate or gift tax.

Each person gets a GST exemption equal to the basic exclusion amount, $15 million for 2026.¹⁴ You allocate this exemption to specific trusts, and once a trust is fully covered, distributions to grandchildren and beyond are GST-tax-free. Failing to allocate properly is one of the costliest mistakes in trust planning. A trust that could have been entirely exempt might trigger a 40 percent tax on every distribution because the allocation wasn’t made on a timely gift tax return.

Valuation Discounts on Business Interests

When you transfer interests in a family-controlled business or partnership to a trust, the reported value is often less than a proportional share of the underlying assets. A 30 percent stake in a family limited partnership is worth less than 30 percent of the partnership’s net assets, because the holder can’t force a sale and can’t easily find a buyer. These “lack of control” and “lack of marketability” discounts routinely reduce reported value by 20 to 40 percent, letting you move more wealth into a trust while using less of your lifetime exemption.

The IRS scrutinizes these discounts aggressively. If the value you report on a gift or estate tax return is 65 percent or less of what the IRS determines is correct, a 20 percent accuracy penalty applies to the underpayment. If your reported value is 40 percent or less, the penalty doubles to 40 percent.¹⁵ A qualified independent appraisal is essential whenever you transfer hard-to-value assets like business interests, real estate, or artwork into a trust.

Filing Requirements Once a Trust Is in Place

Trust-based estate planning creates ongoing filing obligations that catch many families off guard.

Form 706, the estate tax return, is due within nine months of death, with an automatic six-month extension available on Form 4768. Even estates below the exemption must file if the executor wants to elect portability.¹⁶
Form 709, the gift tax return, is required any year you give more than $19,000 to one person, make a future-interest gift, or split gifts with your spouse. It’s due April 15 of the following year.⁶
Form 1041, the trust income tax return, is required for any trust with gross income of $600 or more in a year. For grantor trusts, the income is reported on the grantor’s personal return instead.¹⁷

Failing to file a required estate tax return triggers a penalty of 5 percent of the unpaid tax for each month the return is late, up to 25 percent.¹⁸ On a taxable estate, that compounds fast. If you’re administering a trust or estate, tracking these deadlines should be the first conversation you have with the attorney or accountant handling the filings.

1
Office of the Law Revision Counsel. 26 USC 2001 – Imposition and Rate of Tax
2
Office of the Law Revision Counsel. 26 USC 2038 – Revocable Transfers
3
Office of the Law Revision Counsel. 26 USC 2036 – Transfers with Retained Life Estate
4
Internal Revenue Service. Whats New – Estate and Gift Tax
5
Office of the Law Revision Counsel. 26 USC 2503 – Taxable Gifts
6
Internal Revenue Service. Instructions for Form 709
7
Office of the Law Revision Counsel. 26 USC 2042 – Proceeds of Life Insurance
8
Office of the Law Revision Counsel. 26 USC 2035 – Adjustments for Certain Gifts Made Within 3 Years of Decedents Death
9
Office of the Law Revision Counsel. 26 USC 2702 – Special Valuation Rules in Case of Transfers of Interests in Trusts
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Office of the Law Revision Counsel. 26 USC 1014 – Basis of Property Acquired from a Decedent
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Office of the Law Revision Counsel. 26 USC 2056 – Bequests Etc to Surviving Spouse
12
Office of the Law Revision Counsel. 26 USC 2010 – Unified Credit Against Estate Tax
13
Office of the Law Revision Counsel. 26 USC 2522 – Charitable and Similar Gifts
14
Office of the Law Revision Counsel. 26 USC 2631 – GST Exemption
15
Office of the Law Revision Counsel. 26 USC 6662 – Imposition of Accuracy-Related Penalty on Underpayments
16
Internal Revenue Service. Instructions for Form 706
17
Internal Revenue Service. 2025 Instructions for Form 1041
18
Internal Revenue Service. Failure to File Penalty