The Core Four: The Legal Documents Everyone Should Have in Place

At a Glance

• Most people have one or two of these documents in place — but comprehensive planning requires all four, working together as a coordinated safety net.
• Each document serves a distinct purpose: financial decisions, medical decisions, end-of-life preferences, and asset distribution.
• Estate planning failures are rarely about missing documents — they're about outdated designations, poor coordination, and plans that haven't kept pace with life.

No one likes to imagine a time when they might be sick or unable to make decisions for themselves. It ranks alongside cleaning out the garage or scheduling a long-overdue physical—important, but all too easy to postpone. Yet having the right estate planning documents in place can make all the difference.

Without a clear plan in place, the state might step in and appoint a guardian to make financial and medical decisions on your behalf. Someone you didn’t choose could end up deciding where you live, how your money is managed, or what medical treatments you receive. That's not a situation any of us wants to be in.

Incapacity exists on a spectrum. It could look like cognitive decline from Alzheimer’s or dementia, physical incapacity after an injury or illness, a sudden event such as a stroke, or a gradual decline over time.

Because these scenarios unfold differently—and at different life stages—you’ll need four key documents to address them:

1. a durable power of attorney,
2. health care proxy,
3. living will, and
4. a will or revocable trust.

You may already have one or two of these documents, but comprehensive planning requires all four. Together, these documents create a coordinated safety net. Without one, gaps can appear. It’s like living near a river and buying homeowner’s insurance but skipping flood coverage. You’re mostly protected… until you’re not.

1. Durable Power of Attorney

A durable power of attorney (DPOA) is a legal document that authorizes someone—known as your agent or attorney-in-fact—to manage your financial affairs on your behalf, including bills, banking, investments, and business interests. The word “durable” here is key: it means the document remains valid even if you become mentally incapacitated.

Choosing the right person to fill this role matters. Consider someone who is financially responsible, trustworthy, and capable of handling potential conflict if family members disagree. Many people select a spouse or adult children. If these options don’t feel appropriate, we can help you identify another trusted individual or a professional fiduciary.

It’s also wise to appoint a backup agent in case your first choice is unavailable when needed.

One related tool worth knowing about: a trusted contact person on your financial accounts. Unlike a DPOA agent, a trusted contact cannot make decisions or view your accounts, but they can serve as a point of contact for your financial institutions if something seems wrong.

For a deeper look at how a DPOA and a trusted contact person work in practice, including important tips on keeping it current with your financial institutions, see Protecting What's Yours (While You're Alive).

2. Health Care Proxy

Your health care proxy is a document that designates an agent to make medical decisions for you if you are unable to do so yourself. This covers situations where you are unconscious, severely ill, undergoing surgery, or have lost cognitive capacity.

The health care proxy is typically activated when a physician determines that you lack decision-making capacity. At that point, your agent can step in and make decisions about treatments, surgeries, medications, care facilities, and in some states, end-of-life decisions. Ideally, these decisions are guided by your known wishes or their best judgment of what you would want.

Again, a spouse or adult children are common choices. Whoever you name should be someone who understands your preferences about medical care, is comfortable making decisions under pressure, and can advocate for you with medical professionals.

It’s also common to name different individuals for medical and financial decisions. It creates natural checks and balances and helps prevent one person from carrying the entire weight.

3. Living Will

A living will complements your health care proxy. This document spells out—in your own words—the medical treatments you do and don’t want in specific circumstances, such as a terminal condition, a persistent vegetative state or at the end-stage of an illness with little hope for recovery.

You don’t need to name an agent for a living will. However, it may be helpful to come up with this document in conversation with your physician and estate attorney. Tools like the “Five Wishes” framework can serve as a jumping-off point for clarifying your preferences.

Your living will is part of a broader healthcare advance directive. We cover what that includes, and other practical tips, in Protecting What's Yours (While You're Alive).

4. Will or Revocable Living Trust

The first three documents address what happens when you're living but unable to act. The fourth addresses what comes after.

Your estate plan should also include a will or trust that addresses what happens to your assets.

A will outlines how your property should be distributed after you die, names an executor to carry out your wishes, and designates a guardian for any minor children.

A revocable living trust goes a step further. You transfer assets into the trust during your lifetime—typically naming yourself as the initial trustee so you retain full control—and a successor trustee steps in if you become incapacitated or die.

Because assets in a trust bypass the probate process, transfers tend to be faster, more private, and less expensive. There are several types of revocable trusts, and we can work with you and your estate attorney to determine which structure fits your situation.

A will or trust is just the starting point. The greater risk for most families is execution and coordination after documents are signed. We cover what that looks like in Protecting What's Yours (After You Pass) and the step-by-step process in Part 2.

Keep Your Estate Planning Documents Current

No single document covers every phase of incapacity or death. The goal is to have all four in place, kept current, and accessible to the people who may need them.

One important area these documents don’t cover is beneficiary designations on retirement accounts and life insurance policies. These designations override instructions in your will, so make sure they are up to date and aligned with your wishes.

Finally, remember that life is dynamic. Laws evolve, financial situations shift, and relationships change. Plan to review each of these documents regularly, especially after major life events such as marriage, divorce, the birth of a child, relocation, or significant changes in wealth, and update them as needed.

The Core Four documents are the foundation, but they're only as strong as the planning and coordination around them. At TAGStone Capital, we help clients build and maintain that full picture, from incapacity planning to estate execution. To go deeper on what happens after documents are signed, see Protecting What's Yours (After You Pass). Or, if you're ready to talk through where your own plan stands, schedule a complimentary 15-minute conversation.