What Is a Trust? Revocable vs. Irrevocable Trusts Explained

9 min • Estate Planning

A trust is a legal arrangement in which one person (the trustee) holds and manages property for the benefit of another (the beneficiary), following the instructions set by the person who created the trust (the grantor or settlor). Trusts serve three primary purposes: avoiding probate (the public, court-supervised process of distributing assets after death), controlling how and when beneficiaries receive assets, and — in the case of irrevocable trusts — providing tax benefits and asset protection. Trusts are not just for the wealthy; they are flexible tools that can benefit estates of almost any size.

The fundamental distinction in trust law is between revocable and irrevocable trusts. A revocable living trust (also called a revocable inter vivos trust) is created during the grantor's lifetime and can be modified, amended, or revoked at any time while the grantor is competent. The grantor typically serves as their own trustee and beneficiary during their lifetime — this means the trust is transparent for tax purposes; all income is reported on the grantor's personal return. The primary benefit of a revocable trust is probate avoidance: assets titled in the trust pass directly to the successor trustee and beneficiaries upon the grantor's death without court involvement, saving time, reducing costs, and maintaining privacy (probate records are public; trust administration is private).

An irrevocable trust cannot be modified or revoked once created (with limited exceptions, such as by court order or with consent of all beneficiaries). In exchange for giving up control, the grantor receives significant benefits: (1) Asset protection — assets in an irrevocable trust are generally protected from the grantor's creditors (though timing matters; transfers to avoid existing creditors can be reversed as fraudulent conveyances). (2) Estate tax reduction — assets in an irrevocable trust are not included in the grantor's taxable estate (for federal estate tax purposes, the exemption is $13.61 million per person in 2024). (3) Medicaid planning — assets transferred to an irrevocable trust more than five years before applying for Medicaid are not counted for eligibility purposes (the five-year 'look-back' period). (4) Special needs planning — a special needs trust preserves a disabled beneficiary's eligibility for government benefits like SSI and Medicaid. (5) Charitable giving — charitable remainder trusts and charitable lead trusts provide income and estate tax benefits.

Funding the trust — transferring assets into the trust's name — is the most commonly overlooked step. Creating a trust document is not enough; you must retitle assets. This means: deed real estate from your name to the trust's name, change bank and brokerage account titles, update beneficiary designations (for retirement accounts, the trust may or may not be the appropriate beneficiary — consult an attorney), and assign personal property. Assets not transferred to the trust during your lifetime may still pass through probate. For a revocable trust, a 'pour-over will' catches any assets left outside the trust and directs them into it at death — but those assets still go through probate first. Funding is an ongoing obligation — every time you buy new property or open a new account, consider whether it should be titled to the trust.

Trusts can be complex instruments, and drafting errors can have costly consequences. Common pitfalls include: failing to fund the trust (the most common mistake), using boilerplate forms without understanding state-specific requirements, naming an inappropriate trustee (someone who lacks financial acumen, lives far away, or has conflicts with beneficiaries), failing to coordinate beneficiary designations on retirement accounts and life insurance with the trust terms, and not updating the trust after major life events (marriage, divorce, births, deaths, moving to a new state). While online trust-creation services exist, meaningful legal advice adds value: an attorney can tailor the trust to your specific situation, ensure compliance with your state's law, and help you think through scenarios you might not anticipate. The cost of a trust ($1,500-$5,000) is small compared to the cost of probate (typically 3-7% of the estate) or the cost of a failed estate plan.

Key Takeaways

• A trust is a legal arrangement: grantor creates it, trustee manages it, beneficiary receives the benefits
• Revocable trusts avoid probate and maintain privacy but provide no tax or creditor protection
• Irrevocable trusts provide asset protection, tax benefits, and Medicaid planning — but you give up control
• Funding the trust (retitling assets) is essential — an unfunded trust doesn't avoid probate
• The cost of a properly drafted trust ($1,500-$5,000) is small compared to probate costs (3-7% of the estate)

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