A trust is a legal arrangement in which one person, the grantor, transfers assets to a trustee who holds and manages them for the benefit of someone else, the beneficiary, under rules the grantor writes into a trust document. Understanding how trusts work comes down to three things: who fills the three roles, whether the trust is revocable or irrevocable, and how the tax code treats the income and the assets inside. Everything else — probate avoidance, creditor protection, Medicaid planning, estate tax reduction — flows from those choices.
The Three Roles and the Assets
Every trust has the same skeleton. The grantor (also called the settlor or trustor) creates the trust, transfers property into it, and writes the rules: who benefits, under what conditions, and when distributions happen.
The trustee holds legal title to the assets and manages them according to the document. The trustee can buy, sell, invest, and distribute, but only inside the boundaries the grantor set, and owes a fiduciary duty to act in the beneficiaries’ interests rather than for personal gain.
The beneficiary holds what the law calls equitable title — the right to receive income or assets from the trust on the schedule and under the conditions the grantor chose. Beneficiaries can be individuals, charities, or both.
The property inside is the trust corpus (or trust principal). Real estate, investment accounts, business interests, life insurance, cash, closely held stock — almost anything with transferable value can go in.
One person can fill more than one role. A grantor who creates a revocable living trust almost always names themselves as the initial trustee and primary beneficiary during their lifetime. The three roles still have to be defined in the document because successor trustees and remainder beneficiaries take over when the grantor dies or becomes incapacitated. That separation of roles is what makes a trust legally enforceable.
Revocable vs. Irrevocable
The single most consequential choice in trust planning is whether the trust will be revocable or irrevocable. Tax treatment, creditor protection, and Medicaid eligibility all follow from this.
A revocable trust (often called a living trust) lets the grantor keep full control. You can change beneficiaries, swap trustees, pull assets back, or tear the whole thing up whenever you want. The trade-off: for tax purposes, the IRS treats the assets as still belonging to the grantor. You report the income on your personal return, and the assets are part of your taxable estate when you die.1Internal Revenue Service. Instructions for Form 1041 and Schedules A, B, G, J, and K-1 (2025) The main advantage is probate avoidance. When the grantor dies, the successor trustee distributes assets without any court proceeding.
An irrevocable trust works differently. Once the grantor signs and transfers assets in, those assets belong to the trust. The grantor cannot change the terms, reclaim the property, or dissolve the arrangement. Giving up that control is exactly what unlocks the tax and creditor-protection benefits. Assets in a properly structured irrevocable trust are generally excluded from the grantor’s taxable estate, so they avoid the 40% federal estate tax that applies above the exemption threshold.2Internal Revenue Service. Whats New – Estate and Gift Tax Those assets are also typically beyond the reach of the grantor’s future creditors, provided the transfer was not made to defraud existing ones.
An irrevocable trust is the only structure that can achieve real estate tax reduction. A revocable trust cannot.
Living Trusts vs. Testamentary Trusts
The second distinction is about timing.
A living trust (or inter vivos trust) is created and funded while the grantor is alive. It starts managing assets immediately, and it keeps those assets out of probate at death because they are already titled in the trust’s name. A living trust can be either revocable or irrevocable.
A testamentary trust is embedded in the grantor’s will and does not exist until after the grantor dies and the will goes through probate. A court admits the will, and only then does the trust come into being and receive its funding. Because it starts inside a will, the assets are part of the public probate record and exposed to creditor claims during that process. A testamentary trust is always irrevocable once it takes effect, since the grantor is no longer alive to change anything.
People often confuse this timing distinction with revocable-vs.-irrevocable, but they are independent. A living trust can be revocable (the standard estate-planning tool) or irrevocable (for asset protection and tax planning). Revocable-vs.-irrevocable controls the tax consequences; living-vs.-testamentary controls when the trust activates.
Setting One Up and Actually Funding It
Creating a trust is a two-step process, and most of the problems attorneys see happen when people finish the first step and skip the second.
Step one is the document. The grantor works with an attorney to draft the trust instrument, naming the initial trustee, one or more successor trustees, the beneficiaries, and the conditions for distributions. It also specifies when the trust terminates — for example, when the youngest beneficiary reaches 30, or when the grantor dies. Attorney fees for a straightforward revocable living trust typically run from around $1,500 to $5,000 or more, depending on complexity and local market rates.
Step two is funding. A signed trust document without assets in it is just paper. Funding means legally transferring ownership from the grantor’s name into the trustee’s name (as trustee of the trust). For real estate, this requires a new deed recorded with the county. For bank and brokerage accounts, you change the account registration to reflect the trust as owner. If the trust is a non-grantor irrevocable trust, it needs its own Employer Identification Number from the IRS rather than using the grantor’s Social Security number.1Internal Revenue Service. Instructions for Form 1041 and Schedules A, B, G, J, and K-1 (2025)
Life insurance and retirement accounts are handled differently. You typically name the trust as the beneficiary of the policy or account rather than retitling the asset itself.
Any asset the grantor forgets to retitle stays in their individual name and will go through probate at death, defeating the purpose. A pour-over will acts as a safety net. It is a simple will saying that anything the grantor owns at death that is not already in the trust should be transferred into it. Those assets still go through probate first, but they end up governed by the trust’s distribution terms rather than by intestacy law. It catches the stray bank account or the car bought after the trust was signed and never retitled.
How Trust Income Gets Taxed
The IRS splits trusts into two categories for income tax purposes, and the difference matters more than most people realize.
Grantor Trusts
A grantor trust is one where the grantor keeps enough control or economic benefit that the IRS treats the trust as invisible for income tax purposes. All revocable living trusts are grantor trusts by definition, and many irrevocable trusts also qualify depending on how they are structured. The income, deductions, and credits flow through directly to the grantor’s personal Form 1040.1Internal Revenue Service. Instructions for Form 1041 and Schedules A, B, G, J, and K-1 (2025) The trust uses the grantor’s Social Security number and generally does not file a separate return, though some trustees choose to file an informational Form 1041.
Non-Grantor Trusts
A non-grantor trust is its own taxpayer. It needs an EIN, files its own Form 1041, and pays tax on any income it keeps.1Internal Revenue Service. Instructions for Form 1041 and Schedules A, B, G, J, and K-1 (2025) Income distributed to beneficiaries is deducted from the trust’s taxable income and reported on the beneficiaries’ personal returns instead.
The bracket schedule is where the math turns punishing. Individual taxpayers do not hit the top 37% federal bracket until their taxable income runs into the hundreds of thousands. Trusts and estates hit the same 37% rate at just $16,000 of taxable income in 2026.3Internal Revenue Service. Revenue Procedure 2025-32 The full 2026 schedule for trusts and estates:
- 10% on taxable income up to $3,300
- 24% from $3,301 to $11,700
- 35% from $11,701 to $16,000
- 37% on anything over $16,000
Those compressed brackets create a strong incentive to distribute income to beneficiaries who sit in lower individual brackets rather than let it accumulate inside the trust. The 3.8% net investment income tax applies on top of those rates for trusts above a similarly low threshold, making retained income even more expensive.
The 65-Day Rule
Trustees who miss the December 31 deadline for year-end distributions have a cushion. Under the 65-day rule, a trustee can elect to treat distributions made within the first 65 days of the new tax year as if they were paid on December 31 of the prior year.4eCFR. 26 CFR 1.663(b)-1 – Distributions in First 65 Days of Taxable Year The election is made each year on the trust’s Form 1041 and cannot exceed the trust’s distributable net income for that year. It gives trustees room to see final year-end numbers before deciding how much to distribute.
Estate Tax Benefits and the Basis Trade-Off
Irrevocable trusts earn their reputation as estate-planning tools because they can remove assets from the grantor’s taxable estate. In 2026, the federal estate tax exemption is $15,000,000 per individual, and married couples can effectively double that to $30,000,000 through portability.5Office of the Law Revision Counsel. 26 U.S. Code 2010 – Unified Credit Against Estate Tax Amounts above those thresholds get taxed at a flat 40%.2Internal Revenue Service. Whats New – Estate and Gift Tax
Transferring assets into an irrevocable trust is generally treated as a taxable gift. The grantor can offset the value using the $19,000 annual gift tax exclusion per recipient, and anything above that counts against the same $15,000,000 lifetime exemption that applies to the estate tax. The gift must be a “completed gift” — meaning the grantor truly gave up control — for the assets to leave the taxable estate.
Revocable trusts offer no estate tax benefit. Because the grantor can take the assets back at any time, the IRS includes them in the grantor’s estate at death.
The Stepped-Up Basis Trap
Here is the detail most often left out of introductory explanations. When someone dies owning appreciated assets — say, stock bought for $50,000 that is now worth $500,000 — those assets get a stepped-up basis equal to fair market value at death. An heir who sells the next day owes no capital gains tax because the basis jumped to $500,000. Assets in a revocable trust also receive this stepped-up basis, because the tax code specifically includes property in a revocable trust as property acquired from a decedent.6Office of the Law Revision Counsel. 26 U.S. Code 1014 – Basis of Property Acquired From a Decedent
Assets transferred into an irrevocable trust during the grantor’s lifetime generally do not. They carry over the grantor’s original cost basis. If the grantor bought stock for $50,000 and moved it into an irrevocable trust, the trust’s basis stays $50,000. When the trustee sells, the trust or its beneficiaries owe capital gains tax on the full $450,000 of appreciation. That capital gains bill can sometimes rival or exceed the estate tax the irrevocable trust was designed to save, especially for estates only slightly above the exemption. Any serious irrevocable trust plan needs to model both the estate tax reduction and the lost step-up before assets go in.
Spendthrift Protection
A spendthrift provision is a clause in the trust document that prevents beneficiaries from pledging their future distributions as collateral and stops most outside creditors from reaching trust assets before distribution. Once money leaves the trust and lands in the beneficiary’s bank account, it is fair game. While it sits inside the trust, a creditor holding a judgment against the beneficiary generally cannot touch it.
This matters most for beneficiaries who are financially inexperienced, exposed to lawsuits, or going through a divorce. The clause keeps the assets under the trustee’s control and distributed only on the schedule and in the amounts the grantor specified.
Spendthrift protection is not absolute. Under the Uniform Trust Code adopted in most states, certain exception creditors can reach a beneficiary’s trust interest even with a spendthrift clause in place:
- A beneficiary’s child, spouse, or former spouse with a court order for child support or alimony can attach present or future distributions.
- State and federal taxing authorities can reach trust interests to the extent their own statutes allow.
- A creditor who provided services to protect the beneficiary’s interest in the trust itself may obtain a court order against distributions.
Which exception creditors can reach the trust, and under what conditions, varies by state. The spendthrift clause should be drafted with the governing state’s version of the trust code in mind.
Choosing and Overseeing a Trustee
The grantor’s choice of trustee shapes how the trust operates in practice. There are two basic options.
An individual trustee — a family member, friend, or trusted advisor — brings personal knowledge of the beneficiaries and can exercise discretion with context a stranger would lack. Individuals also die, become incapacitated, move away, or develop conflicts of interest, and managing investments and filing tax returns takes a level of financial sophistication not every well-meaning relative has. The role also exposes them to personal liability for mistakes.
A corporate trustee — a bank trust department or trust company — offers permanence and professional investment management. The trade-off is cost and inflexibility. Corporate trustees typically charge an annual fee calculated as a percentage of assets under management, and their handling of discretionary distributions can feel rigid. Some will decline to serve if the trust holds hard-to-manage assets like real estate or closely held businesses.
Many grantors split the difference by naming an individual and a corporate trustee as co-trustees, or naming an individual with authority to appoint a corporate successor. A “trust protector” provision — giving a designated person the power to remove and replace the trustee without a court proceeding — is another common addition.
Whoever serves owes three fiduciary duties. The duty of loyalty forbids self-dealing and requires administration solely for the beneficiaries’ benefit. The duty to follow the trust terms means observing the distribution instructions and investment guidelines in the document, keeping accurate records, and providing regular accountings (typically annual) to beneficiaries. The duty to invest prudently — codified in most states through some version of the Uniform Prudent Investor Act — requires managing the portfolio as a whole, diversifying unless the document says otherwise, and weighing risk, inflation, tax consequences, and liquidity. Parking everything in a savings account is not prudent management, and neither is concentrating in a single stock, even if the grantor originally funded the trust with that stock. Breaching any of these exposes the trustee to personal liability.
Specialized Trusts to Know By Name
Beyond the basic categories, several specialized trusts address specific planning needs. A general overview should at least flag them.
- A special needs trust holds assets for a beneficiary with a disability without disqualifying them from means-tested government benefits like Medicaid and Supplemental Security Income. The trustee pays for supplemental needs the government programs do not cover, while the beneficiary stays eligible because they do not personally own the assets.
- A charitable remainder trust pays the grantor or another non-charitable beneficiary an income stream for a set number of years or for life, with the remaining assets going to charity afterward. The trust itself is generally exempt from income tax during its existence, and the grantor gets a partial charitable deduction up front.7Office of the Law Revision Counsel. 26 U.S. Code 664 – Charitable Remainder Trusts
- A generation-skipping trust is designed to pass wealth directly to grandchildren or more remote descendants while minimizing the generation-skipping transfer tax. The 2026 GST exemption is $15,000,000 per individual, mirroring the estate tax exemption.5Office of the Law Revision Counsel. 26 U.S. Code 2010 – Unified Credit Against Estate Tax
Each requires careful drafting and typically involves an attorney who specializes in trust and estate law. The wrong structure can trigger exactly the tax or benefit consequence you were trying to avoid.
Irrevocable Trusts and the Medicaid Look-Back
One of the most common reasons people create an irrevocable trust has nothing to do with estate taxes. It is about protecting assets from long-term care costs while preserving eligibility for Medicaid.
Medicaid is means-tested: applicants must have limited assets to qualify for nursing home coverage. Transferring assets into an irrevocable trust can move them off the applicant’s personal balance sheet. But federal law imposes a 60-month look-back period. If you transferred assets into a trust within five years before applying for Medicaid, the state will treat the transfer as if you still own the assets and impose a penalty period during which you are ineligible for benefits.8Office of the Law Revision Counsel. 42 U.S. Code 1396p – Liens, Adjustments and Recoveries, and Transfers of Assets
Revocable trusts do not help at all. Medicaid treats the entire corpus of a revocable trust as an available resource because the applicant can still take the money back. For irrevocable trusts, any portion from which a payment could be made to the applicant under any circumstances is still counted as available.8Office of the Law Revision Counsel. 42 U.S. Code 1396p – Liens, Adjustments and Recoveries, and Transfers of Assets The document has to be drafted so the grantor has zero access to the principal — not limited access — for the assets to fall outside the Medicaid calculation after the look-back period ends.
Timing controls everything here. Waiting until a health crisis to transfer assets starts the five-year clock too late. People who plan ahead fund an irrevocable trust well before any anticipated need for long-term care and cover expenses through other resources or insurance while the look-back runs. State Medicaid programs layer their own rules on top of the federal framework, so working with an elder law attorney familiar with the applicable state’s program is essential to a plan that actually holds up when it is tested.