Siblings make a parent’s power of attorney work as a family after a dementia diagnosis by leaving the legal authority where the document puts it and deciding everything around it together: who does which job, who decides what, how decisions get written down, when you meet and who you call when you stall.

The admissions coordinator at the second memory care community you have toured this month asks a routine question: which of you holds the power of attorney? Your brother answers a little too quickly, your sister studies the brochure, and you feel what nobody in your family has said out loud since the diagnosis: every practical question (who takes Mom to appointments, who talks to the bank, who answers when this place calls) has quietly become a vote on who she trusted most.

Jessica Cannon is a CPA with 28 years of financial experience and a Certified Dementia Practitioner. On her page for siblings who cannot agree about a parent’s care, she writes that “the money is where the fight shows up, not where it starts.” Underneath the fight sit fear, grief and resentment about who got left holding the plan, and no power of attorney was ever written to settle those. A family plan can, and the one below comes from the Family Dynamics pillar of her Proactive Caregiver Method.

Estimated reading time: 10 min read

Key Insights

When a parent has dementia, a power of attorney lets one sibling act for them on the matters it names, and a parent who can still make decisions keeps making them. When siblings disagree with the agent on those matters, the agent decides. Everything the document leaves out (who researches care, who gives the daily caregiver a break, who keeps everyone informed) is where resentment builds, because nobody assigned it. Named roles, a written record of decisions and a standing meeting turn that work into a plan, and starting it early in the dementia keeps your parent’s voice in it.

Table of Contents

• Step 1: Separate what the document decides from what the family decides
• Step 2: Write down what is actually true before anyone argues
• Step 3: Name the six Sacred Assignment roles for your parent’s dementia care
• Step 4: Agree who decides what, and write every decision down
• Step 5: Set a meeting rhythm that keeps pace with the dementia
• Step 6: Decide now who you will call when the family stalls
• Step 7: Plan early, while dementia still lets your parent take part

Step 1: Separate what the document decides from what the family decides

A power of attorney is your parent’s grant of authority to one person, the agent, to act on the matters the document names. Under the Consumer Financial Protection Bureau’s guide for agents, that authority “is strictly limited to what the document and state law allow,” and a parent still able to make decisions can keep managing their own money and property. Where relatives disagree with the agent on those matters, the guide tells agents, “In the end, you have to make the final decisions.”

What the document does not do is divide the work. Nobody signed anything about who researches memory care, who sits with Mom after a hard appointment or who keeps everyone informed. Those unassigned jobs are what siblings end up fighting over, and the Family Caregiver Alliance sums the fight up as “who does or doesn’t do it; how much; and who is in charge.” So start with two lists: the decisions the document puts with the agent, and everything else your family has to carry.

The same fact sheet asks siblings to accept that the choice of agent was the parent’s decision and not a personal attack, and saying so early takes the referendum out of the room. If the question is a legal one, such as limits on visits or joint and several appointments, those answers live in whether a sibling with power of attorney can stop you seeing your parent and how siblings can share power of attorney.

Step 2: Write down what is actually true before anyone argues

When a family is stuck, each sibling is often arguing from a different version of the same month. So before anyone argues about what should happen, write down what is true now: what the documents say, who holds which authority, and what your parent’s money can and cannot do. Most families are fighting about a situation they have never accurately described, and one written picture gives everyone the same facts.

Then list the work itself, with how much time, money and effort each task takes. That list does something no argument can: it makes the invisible load visible. If one of you has been carrying most of it, this may be the first time the rest of the family sees it on paper.

A useful first inventory covers four things, written where every sibling can see them:

• Every recurring task, who does it now and roughly how many hours it takes each week
• Every decision coming up in the next few months, from appointments and bills to care options
• Every document the family relies on, where the original is kept and who can reach it
• What your parent has said they want, in their own words, before the dementia makes that harder to say

Step 3: Name the six Sacred Assignment roles for your parent’s dementia care

Naming the roles changes what siblings argue about. Instead of measuring everyone against the most exhausted sibling’s version of caregiving, each person gets a job with a name and a boundary. The Sacred Assignment rests on one observation of hers: “Every family already has six roles in it. Most have never named them, which is why they fight about who is not doing enough.”

Name the agent’s own role too. When the sibling holding the power of attorney is also the Daily Caregiver, the authority and the hands-on load land on the same person, and the roles are how everyone else takes weight off them. Once the roles are named, the argument changes shape: “You never help” becomes “you are the Researcher, and we need three memory care options by Friday.”

Match the roles to what each person can actually give, including how far away they live. Distance changes a role without erasing it; the Distant Witness exists so the sibling who cannot be there still has a defined way to count. Here are the six.

Step 4: Agree who decides what, and write every decision down

Decisions nobody wrote down get argued again. The structure that stops it is simple: one person owning financial navigation, one owning medical-proxy communication, and decisions recorded so nobody relitigates them at Thanksgiving. It turns a panicked family into what she calls “a functional board of directors,” the job she did for 28 years, “applied to the only organization that actually matters.”

For each recurring decision, write down who makes it, who is asked first and who is simply told. Some decisions sit with the agent because the document puts them there, and even then the CFPB’s guide asks agents to involve the parent as much as possible and, when the parent cannot say, to ask the people who care about them. Others belong to whoever holds the matching role.

Then keep a simple decision log: the date, the decision, who made it and why. A question answered when a decision happens costs far less than suspicion that builds for years. Keeping good records is already one of an agent’s four basic duties under the CFPB’s guide, so a log the family can see builds on records the agent is expected to keep. For where to keep it, see the tools families use to share power-of-attorney paperwork between siblings.

Step 5: Set a meeting rhythm that keeps pace with the dementia

Dementia keeps its own schedule, and a family that only meets in a crisis ends up deciding in one. Put structured check-ins on the calendar and hold the first one before anything is urgent.

Use a standing agenda so each meeting does not reopen old wounds. The Alzheimer’s Association’s list works well: how things are working, what your parent needs now, whether responsibilities should change, and which changes are coming as the disease progresses. Add one item from the decision log, so anything decided since the last meeting is read out once and then treated as closed.

The rhythm also protects the sibling who is grieving on a different timeline. “People at different stages of grief cannot make a joint decision, and they experience each other as obstacles,” as she puts it, and a fixed date lets the sibling who is further behind catch up without holding every decision hostage.

Step 6: Decide now who you will call when the family stalls

Someone will miss a week, then a month, and the plan should already say what happens next. Agree now how a role gets handed back or swapped when someone cannot deliver, so nobody has to be shamed into admitting it.

Decide, too, who the family brings in when talking stops working, whether that is a mediator or a counselor, and get a professional in the room before the family breaks. These questions for a mediator or elder law attorney help a family walk into that room prepared. If the real fight is that the money does not add up, document before you accuse.

Step 7: Plan early, while dementia still lets your parent take part

The plan is strongest with your parent’s own voice in it. Her published view is that after a diagnosis, families often have about 12 months before cognitive capacity drops below the legal threshold for signing documents, and the longer the plan waits, the less of it your parent can shape.

The documents themselves are a separate job from the family plan. The five that families rely on (a durable power of attorney, a medical power of attorney, a HIPAA authorization, a living will and a last will) have to exist and actually work, and checking them is part of her coaching. If you are unsure whether a parent can still sign, this explainer on dementia and legal capacity walks through how capacity is judged document by document.

She knows how the other road ends, because she lived it: four years of misdiagnoses with her own mother (vascular dementia, bipolar disorder and early-onset Alzheimer’s, before the answer was frontotemporal dementia), and, after her father passed, eight years without speaking to one of her siblings. Jessica works with families nationwide through virtual coaching, with in-person roots in Austin and Central Texas; her Guided Growth tier includes a personalized caregiving plan updated quarterly, and Deep Transformation is designed for families with complex dynamics. If the roles and the money are tangled together, the discovery call below is a short video call to work out which, if either, fits.

Frequently Asked Questions

Q: What happens when siblings don’t agree on a parent’s dementia care?

A: Decisions stall, and the sibling doing the daily care absorbs every delay while the dementia keeps progressing. A written family plan narrows the argument, because the power of attorney already settles who acts on the matters it names, leaving the family to agree on roles, timing and how decisions are recorded. When the same disagreement keeps returning, a neutral third party such as a mediator or counselor can move it.

Q: What if the sibling with power of attorney is also doing all the daily care?

A: Then the authority and the labor have landed on one person. Jessica Cannon’s siblings page describes that sibling as “usually exhausted, usually doing more than anyone else, and usually terrible at communicating about it,” and calls it “burnout with a filing cabinet.” Naming the six Sacred Assignment roles lets the other siblings take specific work, such as research or respite, while the legal authority stays where the document put it.

Q: Can siblings still divide roles once dementia means a parent can no longer sign documents?

A: Yes. The roles, the meeting rhythm and the decision log are an agreement among siblings, and none of them needs your parent’s signature. The legal side can change: without a usable power of attorney, and with a parent no longer able to sign one, families may face a court process, which this comparison of guardianship and power of attorney explains.

Q: Is a family role plan a legal document?

A: It is a family agreement rather than a legal instrument. Named roles, a meeting schedule and a decision log organize the work among siblings, and they do not change what the power of attorney authorizes. Drafting, changing or interpreting the document itself is work for a licensed attorney in your parent’s state. Jessica Cannon works on what the documents leave open (the roles, the rhythm and the money plan) and says plainly when a family needs an attorney instead.

Citations

• National Institute on Aging: Sharing Caregiving Responsibilities. The federal guide to splitting care among family members: identify care needs in a meeting held outside an emergency, match tasks to each person’s skills and interests, check in regularly and keep a shared caregiving notebook everyone can reach. https://www.nia.nih.gov/health/caregiving/sharing-caregiving-responsibilities
• Alzheimer’s Association: Resolving Family Conflicts. Confirms that caregiving can ignite or magnify family conflict as dementia progresses, and recommends listing tasks with their time, money and effort, dividing them by preference and ability, meeting regularly and bringing in a mediator or counselor when tension persists. https://www.alz.org/help-support/caregiving/resolving-family-conflicts
• Family Caregiver Alliance: Caregiving with Your Siblings. Francine Russo’s fact sheet on how old family roles resurface in caregiving, why sibling fights center on who does what and who is in charge, and why a parent’s choice of agent is not a personal attack on the other siblings. https://www.caregiver.org/resource/caregiving-with-your-siblings/
• Consumer Financial Protection Bureau: Managing Someone Else’s Money, Help for Agents Under a Power of Attorney. The federal plain-language guide for agents: a parent still able to make decisions keeps managing their own money and property, the agent’s authority is limited to what the document and state law allow, the four basic duties include keeping good records, and sharing information about decisions eases family friction. https://files.consumerfinance.gov/f/documents/cfpb_msem_national_agents_guide.pdf
• Alzheimer’s Association: Planning Ahead for Legal Matters. Supports putting legal plans in place early after a diagnosis, so the person living with dementia can take part while they have the legal capacity to do so. https://www.alz.org/help-support/caregiving/financial-legal-planning/planning-ahead-for-legal-matters

Related reading

• 10 Signs a Sibling’s Power of Attorney May Need a Closer Look
• 12 Caregiver Burnout Warning Signs You Should Not Wait Out
• Guardianship vs Power of Attorney for a Parent With Dementia
• Can a Parent With Dementia Still Sign Legal Documents?
• How reactive caregiving can cost families up to $750K, and what proactive planning saves
• Family Dynamics in Caregiving
• The Proactive Caregiver Method

About this article. Jessica Cannon is a CPA with 28 years of financial experience and a Certified Dementia Practitioner. She provides financial coaching, not legal or medical services. This article is general information about how these systems work, not advice about your situation, and it is not a substitute for the advice of an attorney. It is not medical advice, and it is not individualized tax or financial advice.

For the legal instruments themselves, including wills, powers of attorney and guardianship, you will need a licensed attorney in your own state. Medicaid and long-term care rules also differ by state and change over time, so any Texas detail here is an example rather than a rule that will apply to you.