What Is a Trust? Purposes, Types and Structures

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A trust is a legal arrangement in which one party, the trustor (also called the grantor or settlor), transfers legal title to property to a second party, the trustee, who holds and manages that property for the benefit of a third party, the beneficiary. The trustee owns the assets on paper but must use them only as the trust document directs and only in the beneficiaries’ interest. That obligation is a fiduciary duty, and it is the core of what a trust is.

People use trusts to decide how money and property are managed and distributed during their lifetime, after their death, or both, on terms the trustor sets.

The Parts of a Trust

A trust has three roles and one body of property. One person can sometimes fill more than one role.

• Trustor (grantor or settlor): the person who creates the trust, writes or approves its terms and transfers assets into it.
• Trustee: the person or institution that holds title to the trust property and administers it. A trustee can be a family member, a friend, a professional, or a trust company or bank. The trust document usually names one or more successor trustees to take over if the first trustee dies, resigns or becomes incapacitated.
• Beneficiary: the person, people or organization the trust exists to benefit. A trust can have current beneficiaries who receive income now and remainder beneficiaries who receive what is left later.
• Trust property (the corpus or principal): the assets held in the trust, such as cash, brokerage accounts, real estate, business interests or a life insurance policy. When a trust holds mainly financial assets, people often call it a trust fund.

The trust document, often called a trust agreement or declaration of trust, sets the rules: what the trustee may invest in, when and how distributions are made, what conditions a beneficiary must meet, and when the trust ends. Those terms operate alongside the trust law of the governing jurisdiction, and a trust is usually drafted with an estate planning attorney.

Tax authorities and courts often treat a trust as distinct from the people involved. In the United States, an irrevocable trust typically needs its own taxpayer identification number and files its own income tax return, while a standard revocable living trust is usually disregarded for income tax and reported under the trustor’s Social Security number.

How a Trust Works

The mechanics follow a simple sequence:

1. Creation. The trustor signs a trust document naming the trustee, the beneficiaries and the rules.
2. Funding. The trustor transfers assets into the trust. This means retitling: a house is deeded to the trust, a brokerage account is re-registered in the trust’s name, or the trust is named as beneficiary of an asset. Assets that are never transferred are not governed by the trust.
3. Administration. The trustee invests and protects the assets, keeps records, files any required tax returns and makes distributions as the document allows.
4. Distribution and termination. At the times or events the document specifies (a beneficiary reaching a certain age, the death of the trustor or a spouse, the completion of an education), the trustee distributes assets. When everything has been distributed, the trust ends.

A common use is providing for a minor. Children under 18 cannot hold and manage significant assets on their own, so property left to them needs a trustee or guardian. A trust lets the trustor release assets at 18, at 25, in stages, or only for approved purposes, rather than handing a young adult a lump sum as soon as the law allows.

Who Controls a Trust?

The trustee controls the assets day to day, within limits set by the document and by fiduciary duty. In a revocable trust, the trustor commonly serves as their own trustee, and sometimes as a beneficiary, then a successor trustee takes over at death or incapacity. In an irrevocable trust used for tax or asset protection, someone other than the trustor generally needs to serve as trustee, because those benefits rest on the trustor having actually given up control. Beneficiaries do not manage the trust, but they can hold the trustee to account for mismanaging assets or ignoring the terms.

Categories of Trusts

The many named types of trusts are combinations of three pairs of characteristics.

Living or Testamentary

A living trust, also called an inter vivos trust, is created and takes effect during the trustor’s lifetime. The trustor can use and benefit from the assets while alive, and the named trustee (or successor trustee) handles the trust and transfers assets to the beneficiaries after the trustor’s death.

A testamentary trust, sometimes called a will trust, is written into a will and does not come into existence until the trustor dies. Because it is created through the will, the assets that fund it typically pass through probate first.

Revocable or Irrevocable

A revocable trust can be amended or terminated by the trustor at any time during the trustor’s lifetime. An irrevocable trust generally cannot be changed or cancelled once it is established, apart from narrow exceptions that vary by jurisdiction.

Living trusts can be either revocable or irrevocable. Testamentary trusts are generally irrevocable once they take effect, although the trustor can change the will that would create one at any time while alive. Permanence is what makes an irrevocable trust’s tax benefits possible: assets that have truly left the trustor’s ownership are no longer part of the trustor’s estate.

Funded or Unfunded

A funded trust holds assets the trustor has transferred into it during their lifetime. An unfunded trust consists only of the trust agreement, with nothing yet retitled into it. An unfunded trust may be funded at the trustor’s death (for example through a “pour-over” will or beneficiary designations) or may stay empty. An unfunded or partly funded trust leaves assets exposed to the same probate, delay and publicity the trust was meant to avoid.

Common Purposes for Trusts

Protecting Assets

Trusts can shield assets from creditors and others who might claim them, and from beneficiaries who might sell or spend them too quickly. Even a responsible adult child could face a lawsuit, a divorce or a business failure; property held in a properly drafted trust, rather than owned outright by that child, may be harder for outside parties to reach. The level of protection depends heavily on the trust type and on state law.

Beneficiary Care

Trusts are often associated with high-net-worth families because they can be expensive to establish and maintain, but one of their most important uses applies at any wealth level: ensuring that a dependent with a physical disability or mental health condition receives lifelong care and financial support under someone else’s management. Some trusts also let a person qualify for Medicaid while preserving part of their wealth.

Privacy

In many jurisdictions a will becomes public record once it goes through probate, showing what the deceased owned and who received it. A funded trust can do much of what a will does without that public court process, keeping assets and beneficiaries private.

Estate Planning and Probate

Assets in a funded trust pass under its terms rather than through probate, which saves time and court costs and lets the successor trustee act without waiting for a court. A trust can also go beyond the default of leaving everything to a spouse and then dividing it equally among children: it can stagger inheritances, treat beneficiaries differently, or tie distributions to education, a home purchase or starting a business.

Tax Planning

Depending on the type of trust, holding assets in one can lower estate tax, gift tax, generation-skipping transfer tax or income tax compared with the alternatives, which makes trusts a standard tax planning tool for individuals and businesses.

Example of a Trust: How Basis Affects the Heirs’ Tax Bill

Cost basis is the figure used to calculate a taxable gain. In the U.S., assets included in a person’s estate at death generally receive a step-up in basis to their market value on the date of death. Assets in a revocable trust are included in the trustor’s estate, so they qualify. Assets the trustor gave away during life, including assets moved into an irrevocable trust kept out of the estate, generally keep a carryover basis, meaning the original owner’s cost.

Hypothetical example (assumes U.S. rules, no other basis adjustments, and a sale by the beneficiary after the transfer):

• The trustor bought shares for $5,000.
• At the trustor’s death the shares are worth $10,000.
• The beneficiary later sells them for $12,000.

The $5,000 difference in taxable gain comes entirely from which basis rule applies. The step-up applies to inherited assets in general, so a revocable trust does not create the benefit; it preserves it. An irrevocable trust that removes assets from a taxable estate may save estate tax, but heirs can give up the step-up in exchange. The better trade-off depends on the size of the estate, the applicable exemption and the expected appreciation of the assets.

Types of Trusts

The categories above combine into many specialized trusts. Some of the more common ones:

• Credit shelter trust (also called a bypass or family trust, though “family trust” is also an informal label for any trust benefiting family members): at the first spouse’s death, an amount up to the estate tax exemption goes into this trust and the rest passes to the surviving spouse tax-free under the marital deduction. The trust’s assets and their growth stay outside the surviving spouse’s taxable estate, so the eventual beneficiaries receive them without estate tax.
• Generation-skipping trust: transfers assets to beneficiaries at least two generations younger, typically grandchildren, using the generation-skipping transfer tax exemption.
• Qualified personal residence trust (QPRT): removes a home or vacation home from the trustor’s estate, which helps when the property is expected to appreciate significantly.
• Irrevocable life insurance trust (ILIT): holds a life insurance policy so the proceeds stay out of the taxable estate and can cover estate costs. The trustor can no longer borrow against the policy or change its beneficiaries.
• Qualified terminable interest property (QTIP) trust: directs assets to different beneficiaries at different times. Typically a surviving spouse receives income for life and children receive the remainder after the spouse dies.
• Separate share trust: one trust with different terms for each beneficiary, such as different ages or conditions for each child.
• Spendthrift trust: prevents beneficiaries from selling or pledging their interest and shields the assets from beneficiaries’ creditors, with an independent trustee managing the assets.
• Charitable trust: benefits a charity or nonprofit and can lower estate and gift taxes. A charitable remainder trust pays income to named beneficiaries, such as a spouse or children, for a set period, then gives the remainder to charity.
• Special needs trust: supplements the income of a dependent who receives government benefits such as Social Security disability benefits, without causing them to lose those benefits.
• Blind trust: the trustee manages the assets without the beneficiary knowing the specific holdings, which helps public officials and others avoid conflicts of interest.
• Totten trust (payable-on-death account): created by adding language such as “In Trust For,” “Payable on Death To” or “As Trustee For” to a bank account title. The account holder keeps control during life, and the funds pass outside probate at death. It needs no separate agreement and often costs nothing, hence the nickname “poor man’s trust,” but it works only for bank accounts, not physical property.

Benefits of an Irrevocable Trust

In exchange for giving up ownership and control, the trustor of an irrevocable trust generally removes its assets from the taxable estate, which can reduce estate taxes at death. Depending on the structure and jurisdiction, those assets may also be out of reach of the trustor’s future creditors. A revocable trust offers flexibility instead: it avoids probate and provides for management during incapacity, but its assets remain part of the estate and generally remain reachable by the trustor’s creditors.

How Much Does a Trust Cost?

A trust should be drafted with a qualified attorney, and the price rises with complexity. As a general range, a revocable living trust may cost from under $1,000 to around $3,000 to establish. Irrevocable trusts cost more because they involve more tax planning and drafting. Funding can add deed recording and account paperwork, a professional trustee or trust company typically charges ongoing administration fees, and an irrevocable trust may need its own annual tax return.

Limitations of a Trust

• It only governs what it holds. Assets left outside the trust still pass by will, beneficiary designation or state intestacy law, and may go through probate.
• Control versus benefits. Estate tax savings and asset protection require giving up control, often permanently.
• Cost and administration. Drafting, funding, trustee fees and tax filings make a trust more expensive to maintain than a simple will.
• Possible tax trade-offs. Moving appreciated assets out of the estate can cost heirs the step-up.
• Dependence on the trustee. A trust is only as well run as its trustee, so choosing a trustee and a successor is as consequential as drafting the terms.

Trust vs. Related Terms

Trust vs. will. A will takes effect only at death, generally goes through probate and becomes public. A funded living trust can operate during life, including if the trustor becomes incapacitated, and passes assets privately without probate. Many plans use both: a trust for the main assets and a will to catch anything left out.

Trust vs. payable-on-death or transfer-on-death designation. A POD or TOD designation passes a single account or asset directly to a named person outside probate, but it offers no ongoing management or conditions. A trust can hold assets for years and attach rules to them.

Trust in business. Historically, “trust” also meant a combination of companies placed under common trustees to control a market, such as the oil and railroad combinations of the late 1800s. Laws against them, starting with the Sherman Antitrust Act of 1890, are why competition law is called antitrust law. That meaning is separate from the personal finance trust.

The Bottom Line

Trusts matter to anyone who wants control over how assets are managed and passed on, from parents of minors to families caring for a dependent with a disability. A funded revocable trust offers flexibility and probate avoidance, while an irrevocable trust trades control for possible estate tax savings and creditor protection. The right choice depends on estate size, expected appreciation, cost and the trustee chosen to run it.