What Is the Difference Between a Will, a Living Will, and an Advance Directive?
By CRYSTAL BAI •
The short answer: A will (Last Will and Testament) distributes your assets after death. An advance directive governs your healthcare before and at death when you can't speak for yourself — it includes a living will (your treatment preferences) and a healthcare power of attorney (who makes decisions for you). A living will is part of an advance directive. These three documents together form essential end-of-life legal preparation.
The terms "will," "living will," and "advance directive" are often confused or conflated — even by lawyers and doctors. Clarifying what each document does, what it doesn't do, and why you need all of them is one of the most practically useful things someone can do to prepare for end of life.
A Will (Last Will and Testament)
A Last Will and Testament is a legal document that governs what happens to your property, possessions, and money after your death. Key functions: naming an executor (who manages the estate); distributing assets to beneficiaries; naming a guardian for minor children; and sometimes specifying funeral or burial preferences. A will goes through probate (the court process of verifying the will and executing its instructions) — which is why many people establish trusts (which avoid probate) in addition to or instead of a will. A will has no legal authority until you die; it governs nothing while you are alive.
An Advance Directive
An advance directive is a legal document (or set of documents) that governs your healthcare when you are alive but cannot make or communicate decisions for yourself. It is also called an "advance healthcare directive" or, in some states, a "directive to physicians." An advance directive typically has two components: (1) A Healthcare Power of Attorney (also called a Healthcare Proxy, Healthcare Agent, or Durable Power of Attorney for Healthcare) — naming the specific person you authorize to make healthcare decisions for you when you cannot. (2) A Living Will — expressing your own preferences about specific medical treatments.
A Living Will
A living will is a specific document (or the specific section of an advance directive) in which you express your own preferences about life-sustaining medical treatments — CPR, mechanical ventilation, feeding tubes, dialysis, aggressive hospitalization — in scenarios where you cannot communicate those preferences yourself. A living will tells your medical team what YOU want. It is not a legal will; it has no authority over property. It governs your body and treatment while you are alive but incapacitated.
Healthcare Power of Attorney
A healthcare power of attorney (HCPOA) names the specific person you authorize to make healthcare decisions on your behalf when you cannot. This is perhaps the most important document you can create: your designated agent can advocate for you, interpret your advance directive in real clinical situations, and make decisions that your written documents may not have anticipated. Your HCPOA should be someone you trust completely, who knows your values, and who can handle medical decision-making under pressure.
POLST and DNR: Different from Advance Directives
A POLST (Physician Orders for Life-Sustaining Treatment) or DNR (Do Not Resuscitate) order is different from an advance directive: these are physician-signed medical orders, not legal documents you create yourself. They are used for people who are already seriously ill or near end of life and translate their previously expressed wishes into physician orders that are immediately actionable across care settings. Your advance directive is the foundation; POLST is the operational translation of those wishes into medical orders.
Do You Need All of These?
Yes, you should have all of these: a will (to govern your property after death); a healthcare power of attorney (to authorize someone to make decisions for you); and a living will (to express your own preferences). The combination ensures that both your body (advance directive) and your estate (will) are governed by your own intentions rather than default state laws or family disputes.
Frequently Asked Questions
What is the difference between a will and an advance directive?
A will (Last Will and Testament) governs what happens to your property after you die. An advance directive governs your healthcare when you are alive but cannot make decisions for yourself. They serve entirely different functions: a will governs your estate; an advance directive governs your body and medical care.
What is a living will?
A living will is a document (or section of an advance directive) in which you express your own preferences about life-sustaining medical treatments — CPR, mechanical ventilation, feeding tubes, dialysis — in situations where you cannot communicate your preferences. It tells your medical team what YOU want, not what someone else decides for you.
What is a healthcare power of attorney?
A healthcare power of attorney (HCPOA) is a document naming the specific person you authorize to make healthcare decisions for you when you cannot. This person (your healthcare agent or proxy) can advocate for you, interpret your advance directive in real clinical situations, and make decisions your written documents may not have anticipated. It is perhaps the most important end-of-life document you can create.
What is the difference between an advance directive and a POLST?
An advance directive is a legal document you create yourself expressing your healthcare preferences. A POLST (Physician Orders for Life-Sustaining Treatment) is a physician-signed medical order that translates those preferences into immediately actionable medical orders. POLST is for people who are already seriously ill; advance directives are appropriate for all adults. Your advance directive informs your POLST.
Do I need both a will and an advance directive?
Yes. A will governs your property after death; an advance directive governs your healthcare while you are alive but incapacitated. They serve entirely different purposes and you need both. Without an advance directive, healthcare decisions may be made by people you would not have chosen, following state default rules rather than your own wishes. Without a will, your property is distributed according to state intestacy law, not your intentions.
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