Estate Planning Terms You Actually Need to Know (Plain‑English Glossary 2026)

Estate planning is full of words that sound bigger and scarier than they are. This glossary explains the most common terms in clear, human language so you can read documents and make decisions without feeling lost.

You don’t need to memorize everything. Skim, bookmark, and come back when a term pops up in a form, conversation, or HeirLight screen.

1. Core Documents

Will (Last Will and Testament)A legal document that says who should receive your property after you die, who should manage the process (executor), and who should care for your minor children or pets (guardian). It only speaks after your death.

Advance Healthcare Directive (Advance Directive / Living Will)A document that explains what kind of medical care you do or don’t want if you cannot speak for yourself (for example, life support, pain relief, end‑of‑life care).

Power of Attorney (POA)A document where you give someone else authority to act for you.

• Durable Power of Attorney (Financial POA): lets someone handle money and legal tasks for you, and stays in effect if you become incapacitated (unless revoked).
• Limited / Specific Power of Attorney: gives someone narrow, temporary powers for a specific task (like signing a document while you’re out of town).

Healthcare Proxy / Medical Power of Attorney / Healthcare AgentA document and role where you name someone to make medical decisions for you if you can’t decide or communicate. Often used together with an advance directive.

TrustA legal arrangement where one person (trustee) holds and manages property for someone else (beneficiary), under written rules (the trust document). There are many types; see below.

2. People and Roles

Testator / Will‑makerThe person who creates and signs a will.

Executor / Personal RepresentativeThe person named in your will to carry out your instructions after you die: pay bills, file paperwork, distribute assets. A court usually confirms their appointment.

BeneficiaryA person or organization that receives property or money from your will, trust, life insurance, retirement account, or other arrangement.

Guardian (of the Person)The adult you nominate in your will to care for your minor children if both parents die (home, school, daily life decisions). A court formally appoints them.

Guardian of the Estate / Conservator (varies by state)Someone appointed to manage money and property for a minor or incapacitated person.

Agent / Attorney‑in‑FactThe person you give authority to under a power of attorney to make decisions or take actions on your behalf (financial, legal, or medical).

TrusteeThe person or institution that manages property inside a trust according to the trust’s rules, for the benefit of the beneficiaries.

HeirSomeone who would inherit under default state law if you die without a will (intestate). Not the same as “beneficiary,” which comes from your written plan.

3. Property and Ownership

EstateEverything you own in your name at the time of your death: money, real estate, personal belongings, digital assets, etc. Also used to describe the legal “bucket” that holds your assets and debts during settlement.

Probate PropertyAssets that pass according to your will (or intestate laws if you have no will), under court supervision. Often includes things like your car, personal belongings, and accounts without named beneficiaries.

Non‑Probate PropertyAssets that pass outside of your will, such as:

• Life insurance with named beneficiaries
• Retirement accounts with beneficiaries
• Payable‑on‑death (POD) or transfer‑on‑death (TOD) accounts
• Certain jointly owned property with survivorship rights

These usually go directly to the named person, regardless of your will.

Joint Tenancy with Right of Survivorship (JTWROS)A way to own property with someone else where, if one owner dies, the other automatically owns the whole property. The deceased owner’s will usually does not control that share.

Tenants in CommonCo‑ownership where each person owns a share that can be left to someone in a will. There is no automatic “survivor gets everything” rule.

Community Property (in some states)A system where most property acquired during marriage is owned equally by both spouses, regardless of whose name is on the title. Can affect what you can give away in your will.

Separate PropertyProperty that belongs only to one spouse, often because it was owned before marriage, inherited, or received as a gift (rules vary by state).

4. What Happens When Someone Dies

ProbateThe court process of validating a will (if there is one), appointing an executor or administrator, paying debts and taxes, and distributing remaining assets to heirs or beneficiaries.

Intestate / Intestate SuccessionDying without a valid will. State law (intestate succession) decides who inherits your probate property (spouse, children, parents, siblings, etc.) using a default formula.

Residuary Estate / ResidueWhatever is left in your estate after specific gifts, debts, taxes, and expenses are handled. Often given to one or more people in a “catch‑all” clause.

Bequest / LegacyA gift in a will, often referring to money or personal property. In plain English, it’s a specific thing or amount left to someone.

DeviseTraditionally, a gift of real estate in a will. In many modern documents, “bequest” or “gift” is used more broadly.

CodicilA separate document that changes part of an existing will without rewriting the whole will. Must be signed and witnessed according to state law.

5. Trusts and Advanced Tools (Plain Overview)

You do not need to master these for a basic plan, but you may see the terms.

Revocable Living TrustA trust you create during your lifetime that you can change or revoke. You often act as your own trustee while alive. Common reasons: avoid probate, manage property if you become incapacitated, keep some details more private.

Irrevocable TrustA trust that generally can’t be easily changed or revoked after it’s set up. Often used for tax, asset protection, or special‑needs planning. More complex, usually requires legal advice.

Special Needs TrustA type of trust designed to provide for a person with disabilities without disrupting eligibility for certain government benefits. This is specialized planning and typically requires an attorney.

Life EstateAn arrangement where someone (often a surviving spouse) has the right to live in or use property for their lifetime, after which it passes to someone else named in the document.

6. Taxes and Beneficiary Designations (High Level)

Estate TaxA tax on the total value of a person’s estate at death, above certain thresholds. Only a small percentage of U.S. estates currently owe federal estate tax, but some states have their own rules.

Inheritance TaxA tax that some states charge beneficiaries on what they receive. Different from estate tax (which is charged on the estate itself).

Beneficiary DesignationThe form where you tell an institution who should receive an asset at your death (life insurance, retirement accounts, POD/TOD accounts). These designations usually override what your will says for that asset.

Payable‑on‑Death (POD) / Transfer‑on‑Death (TOD) AccountsBank or investment accounts that pass directly to a named beneficiary when you die, without going through probate.

7. Health, Incapacity, and Care

Capacity / CompetenceYour legal ability to understand what you’re doing and make decisions. Many estate planning documents require you to have capacity when you sign.

Incapacity / IncapacitatedA state where you are not able to understand information or make decisions for yourself (due to illness, injury, dementia, etc.). This is when powers of attorney and healthcare proxies may come into play.

HIPAA ReleaseA document that lets healthcare providers share your medical information with specific people you choose, so they can help make decisions or understand your condition.

8. How These Terms Show Up in HeirLight

When you use HeirLight, you may see some of these words, but always explained in plain English.

For example:

• “Executor” shows up as “the person who carries out your will and paperwork.”
• “Guardian” is “who would care for your kids if you weren’t here.”
• “Beneficiaries” are “the people or causes you want to inherit from you.”
• “Residuary estate” becomes “everything else you didn’t list item‑by‑item.”

You don’t need to sound like a lawyer to make good decisions. You just need to understand roughly what each role or document does.

Use HeirLight to Turn Terms into a Real Plan

Reading definitions is helpful. Having a plan is better.

HeirLight helps you:

• Create a will that covers your beneficiaries, executor, guardians, and key assets
• Set up an advance healthcare directive and healthcare proxy
• Add a durable power of attorney for finances
• Think clearly about digital assets and your home, using everyday language

You start for $0, answer guided questions, and then print and sign your documents according to your state’s rules.

Important: HeirLight is not a law firm and does not provide legal, tax, financial, or medical advice. Our tools are educational and self‑help in nature. For complex estates, blended families, special‑needs planning, or tax questions, you should consult a licensed professional.

If you’ve been stuck because the words felt confusing, consider this glossary your translation layer. The next step is simple: use that understanding to put a real plan in place.