What Is a Trust Fund? A Plain-English Explanation

When most people hear "trust fund," they picture inherited wealth and spoiled heirs. The reality is far more practical: trusts are flexible, powerful estate planning tools used by families at all income levels to protect assets, provide for children, and avoid probate. Here's a clear explanation of what they are and how they work.

The Basic Structure of a Trust

Every trust involves three roles:

The grantor (or settlor): The person who creates the trust and transfers assets into it. Usually you, the person doing the estate planning.
The trustee: The person or institution that manages the trust assets according to the trust document. In a revocable living trust, the grantor is typically also the trustee during their lifetime, with a successor trustee named to take over at death or incapacity.
The beneficiary: The person (or people, or organization) who benefits from the trust — who receives distributions or has their expenses paid from trust assets.

In many family trusts, the same person wears multiple hats: you (the grantor) create a trust, name yourself as trustee and primary beneficiary during your lifetime, and name your children as successor beneficiaries who receive assets after your death.

What Can Go Into a Trust?

Almost any type of asset can be transferred into a trust: real estate, bank accounts, investment accounts, business interests, personal property, life insurance policies, and more. The process of transferring assets into a trust is called "funding" the trust — an unfunded trust (one that exists on paper but has no assets titled in its name) provides no probate avoidance benefit.

Types of Trusts

Revocable living trust

The most common trust for everyday estate planning. You retain full control during your lifetime, can change or revoke it at any time, and it automatically transfers assets to your beneficiaries at death — without probate.

Testamentary trust

Created through a will and only comes into existence at death. Used to manage assets for minor children or other beneficiaries who need oversight. Does go through probate (because it's created by a will), but then manages assets outside of court thereafter.

Special needs trust

Designed to benefit a person with a disability without disqualifying them from government benefits like SSI and Medicaid. One of the most important trust types for families with a disabled member.

Irrevocable trust

Cannot generally be changed after creation. Used for estate tax reduction, asset protection, Medicaid planning, and charitable giving. Greater tax and legal benefits, but loss of control.

Charitable trust

Designed to benefit a charity (or a mix of charity and family), often with tax benefits. Charitable remainder trusts, charitable lead trusts, and donor-advised funds serve different charitable planning goals.

When Does a Trust Make Sense?

Consider a trust if you: own real estate; have minor children or children with special needs; have a complex or blended family; want to control how and when beneficiaries receive assets; own significant assets and want to reduce estate taxes; or simply want to avoid the cost and delay of probate.

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Frequently Asked Questions

What is a trust fund and how does it work?

A trust fund is a legal arrangement in which one party (the trustee) holds and manages assets for the benefit of another party (the beneficiary), according to the terms set out by the person who created the trust (the grantor or settlor). The trust is a separate legal entity that can own assets — money, real estate, investments, business interests. The grantor transfers assets into the trust and specifies in the trust document: who the beneficiaries are; when and how the assets are distributed (e.g., at age 25, for education expenses, in monthly distributions); who manages the trust as trustee; and what happens if the trust ends. The trustee has a fiduciary duty to manage the trust assets in the best interests of the beneficiaries, according to the trust's terms. "Trust fund" colloquially refers to both the trust itself and the assets held within it. In everyday usage, "trust fund" often implies a trust created for a child or grandchild — but trusts are used in many other contexts, including special needs planning, charitable giving, business succession, and asset protection.

What is the difference between a revocable and an irrevocable trust?

A revocable trust (also called a living trust or revocable living trust) can be changed, amended, or entirely revoked by the grantor at any time during their lifetime. Because the grantor retains this control, the assets in a revocable trust are still considered part of their estate for tax purposes — there is no tax benefit. The primary benefit of a revocable trust is probate avoidance: assets held in trust pass directly to beneficiaries at the grantor's death without going through probate. An irrevocable trust generally cannot be changed or revoked after it is created (with limited exceptions). Because the grantor gives up control of the assets, they are no longer considered part of the grantor's estate for estate tax purposes, and may be protected from the grantor's creditors. Irrevocable trusts are used for estate tax planning (removing large assets from the taxable estate), Medicaid planning (assets properly transferred to certain irrevocable trusts may not count for Medicaid eligibility after the look-back period), asset protection, and certain charitable giving strategies. The trade-off is loss of flexibility and control.

Do you have to be wealthy to benefit from a trust?

No — while trusts are often associated with wealthy families, they provide benefits that apply across a wide range of financial situations. Reasons people of moderate means use trusts: (1) Probate avoidance — even a modest estate (a house, savings, retirement accounts) can benefit from a revocable living trust that avoids the cost and delay of probate (typically $3,000–$15,000 or more in attorney fees, depending on complexity and state); (2) Minor children — if you have young children, a testamentary trust (created through your will) or a living trust ensures assets are managed by a trusted adult until children reach adulthood, rather than being distributed outright at 18; (3) Special needs — if a family member has a disability and receives government benefits, a special needs trust preserves their eligibility while providing supplemental support; (4) Blended families — trusts can ensure children from a prior marriage are provided for even if the surviving spouse remarries; (5) Control over distribution — you can specify that a spendthrift beneficiary receives distributions over time rather than a lump sum. The cost of setting up a revocable living trust through an estate planning attorney is typically $1,500–$3,000 — often less than the probate costs it saves.