When one sibling does all the care for a parent with dementia, most of what they carry can move: the research, the respite, the updates, the funding and some of the hands-on days. What stays put is what the power of attorney gives the named agent, and that is far less than the work. Each role moves to the sibling with the capacity for it, judged by distance, money, flexibility, skills and relationship rather than guilt or birth order, and the move is easiest while your parent can still say who they want doing what.

The pharmacy reminder, the patient-portal messages and the call from the day program all come to your phone. Your siblings love your mother too, and they have views on all of it. Jessica Cannon names this fight The Only One on her page for siblings who can’t agree about a parent’s care: “You do the appointments, the medications, the 2am calls. They send advice from another state and call it helping.”

Jessica is a CPA with 28 years of financial experience and a Certified Dementia Practitioner, and she has sat in that chair. She lived four years of misdiagnoses with her own mother before the answer was frontotemporal dementia, and on her About page she writes, “I resented my siblings for not showing up the way I needed them to.” When her father passed, she did not speak to one of them for eight years. Her framework for this problem is the Sacred Assignment, and this explainer reads it from the seat of the sibling who has been doing all of it.

Estimated reading time: 11 min read

Key Insights

The sibling doing everything for a parent with dementia is often carrying several caregiving roles at once, and nobody assigned any of them. A power of attorney settles who may sign for your parent and assigns none of the care, so the work can move without anyone changing the document. Roles move best by capacity: who is near, who can pay for help, whose week bends, who is good with systems and whose presence steadies your parent. The handoff has a deadline, because the legal capacity that lets your parent say who does what fades as the dementia progresses.

Table of Contents

• Which roles is the sibling doing everything for a parent with dementia actually carrying?
• Why does the dementia care land on one sibling in the first place?
• How do you tell which caregiving role can move, and to whom?
• What does moving the roles by capacity look like in a real week?
• How does the Only One hand a role off without it reading as surrender or a power grab?
• Why does your parent’s dementia set the deadline for moving roles?
• What helps the sibling who has been the only one?

Which roles is the sibling doing everything for a parent with dementia actually carrying?

Often several of the six at once. The Sacred Assignment, in the Family Dynamics pillar of her Proactive Caregiver Method, names six roles every family already has: the Daily Caregiver, the Financial Supporter, the Respite Provider, the Researcher, the Emotional Support and the Distant Witness. What each one covers, and how a family divides all six, is set out in how siblings can make power of attorney work as a family.

A common path: the Only One starts as the Daily Caregiver because they live closest, then picks up the Researcher’s job because they are the one in the waiting room, the Respite Provider’s job because nobody else is on the calendar, and the Emotional Support’s job because your parent looks for them first. If they also hold the power of attorney, the bills and the bank calls land on the same desk. Counting the roles is the first relief: “I do everything” becomes a list other people can take items from.

None of that list comes from the document. A power of attorney lets the agent act for your parent on the matters it names, and the Alzheimer’s Association is precise about its limit: while your parent has legal capacity, it “does not give the agent the authority to override the principal’s decision-making.” The form never asks who will drive to appointments, cover a Saturday or research memory care. So the work lands by default, and it can move without changing a word of the document. The legal edges have their own articles, on whether a sibling with power of attorney can stop you seeing your parent and how siblings can share power of attorney.

Why does the dementia care land on one sibling in the first place?

Rarely by a decision. A Family Caregiver Alliance fact sheet by Francine Russo describes how it can start, “when the sibling who lives nearby or has a close relationship to the parent helps out with small things,” long before anyone calls it a role. Then a diagnosis puts everyone, in Jessica’s words, “straight back into the part they were cast in at nine years old,” and the responsible one becomes responsible for everything.

Many never chose it at all. In AARP and the National Alliance for Caregiving’s Caregiving in the US 2025 report, 56 percent of family caregivers said they felt they had no choice in taking on the role. Those caregivers were less likely to have unpaid help, 51 percent against 56 percent, and nearly three times as likely to report feeling isolated, 34 percent against 12 percent.

Guilt keeps the work where it landed. It hands each new task to whoever lives closest or picked up the phone first, and it tells the sibling carrying it that asking for help means admitting they cannot cope. Russo is blunt about that: being the “responsible” one “does not mean that you should accept doing everything because you always did.” If you are the Only One and you feel resentment, it is a reasonable response to an arrangement nobody agreed to.

How do you tell which caregiving role can move, and to whom?

By capacity, meaning what each sibling can actually give. Equal shares are often unequal costs: a weekly visit is an afternoon for the sibling ten minutes away and a flight for the one in another state. Her Family Dynamics page puts the principle in two lines: “Stop expecting everyone to contribute identically. Name the assignments explicitly to reduce resentment.” Five questions show where each sibling’s capacity sits.

• Distance: who can be there in person, and how often.
• Money: who can pay for help without harming their own household.
• Flexibility: whose week can absorb a hospital day with no notice.
• Skills: who is good with forms, phone trees and research.
• Relationship: whose presence steadies your parent, and whose does not.

What does moving the roles by capacity look like in a real week?

Run the five questions against the Only One’s list and most of it sorts itself. The sibling with money and no spare time can become the Financial Supporter and fund paid respite hours. The one with a flexible schedule takes the Respite Provider’s Saturday. The one who is good with systems becomes the Researcher, a role that works from any state. The sibling who lives far away is the Distant Witness, who, on her siblings page, “cannot be there, and needs a defined way to still count”; the far-away sibling’s job is a whole article of its own.

The Only One keeps what genuinely needs them, which is often the Daily Caregiver’s role, now without four other jobs stacked on top. That is the point of dividing caregiving among siblings by capacity: a role that fits someone’s life is fairer than a matching slice of every task.

How does the Only One hand a role off without it reading as surrender or a power grab?

One defined job at a time, written down. The Family Caregiver Alliance recognizes a pattern many families know: caregivers who say they want help but discourage it when it comes. Named roles give the sibling doing everything something smaller to let go of than control. A handoff that states the role, the task, the deadline and where the result goes is hard to misread as giving up, and just as hard to misread as taking over.

If the Only One holds the power of attorney, the authority stays exactly where the document put it. The Consumer Financial Protection Bureau’s guide for agents lists the agent’s duties as acting only in the person’s best interest, managing their money and property carefully, keeping it separate from the agent’s own and keeping good records. Driving to appointments is not on the list, so handing off the Saturday hands off none of the authority.

The same handoff answers the sibling who feels shut out, the other fight her siblings page names. Her answer to both is documents where everyone can see them, “so nobody has to ask permission to know what is happening to their own parent.” A sibling with a defined role is told what is happening because the job requires it.

Why does your parent’s dementia set the deadline for moving roles?

The second kind of capacity is your parent’s, and it is legal. The Alzheimer’s Association defines legal capacity as “the ability to understand and appreciate the consequences of one’s actions and to make rational decisions,” and notes that the level required “can vary from one type of document to another.” Alzheimers.gov, run by the National Institute on Aging, says that over time the symptoms “will make it difficult to think clearly.”

In her World Alzheimer’s Day release, Jessica said families often have about 12 months after a diagnosis before cognitive capacity drops below the legal threshold for signing documents. “That window is the whole game,” she said. Who can still sign what is covered in her article on signing legal documents after a dementia diagnosis.

The family’s roles are not legal documents, and they still belong inside that window. A parent who can still say who they want doing what gives the family an answer no sibling can. Argue past it and the version nobody wants comes into view: the Alzheimer’s Association says guardianship “is generally considered” when a person with dementia can no longer provide for their own care and “the family is unable to agree upon the type of care needed.” Guardianship versus power of attorney sets out that fork.

What helps the sibling who has been the only one?

Left on one person, the cost lands on that person’s health, and a caregiver whose health gives out becomes the family’s next crisis. The warning signs of caregiver burnout are worth knowing before you are in them.

Jessica, the author of “The Proactive Caregiver,” works with families nationwide through virtual coaching, with in-person roots in Austin and Central Texas. Her coaching tiers start where the Only One usually is. On her siblings page, Tier One is written “for when you need to stop feeling like the only one,” and Tier Two “for when you need a plan the whole family can see,” with a personalized plan updated quarterly. The first conversation is a short video call about what is happening in your family and which roles are sitting on whose shoulders.

Frequently Asked Questions

Q: What if I am the sibling doing everything, but my sibling holds the power of attorney?

A: Then the authority and the work have landed on different people. The power of attorney lets your sibling act for your parent on the matters it names; it does not assign the daily care. The roles are a family agreement, so they can be named and divided without changing the document. Information is part of that agreement too: the Consumer Financial Protection Bureau’s guide suggests agents share accountings or summaries of spending unless the parent has said not to. Questions about visits are legal ones, covered in whether a sibling with power of attorney can stop you seeing your parent.

Q: Does the oldest child automatically get power of attorney?

A: No. A power of attorney exists only because a parent signed one naming an agent while they had the capacity to do it, and being the oldest creates no authority on its own. Who gets named is the parent’s decision, as the Family Caregiver Alliance reminds siblings. Birth order is also a poor guide to caregiving roles: the Sacred Assignment divides the work by distance, money, flexibility, skills and relationship, none of which depends on who was born first.

Q: When is the right time to move caregiving roles after a dementia diagnosis?

A: While your parent can still take part. Jessica Cannon’s published view is that families often have about 12 months after a diagnosis before cognitive capacity drops below the legal threshold for signing documents, and the Alzheimer’s Association notes that the sooner plans are in place, the more likely the person with dementia is to take part. Dividing the roles in the same window lets your parent’s wishes shape who does what, and it puts the structure in place before the next hospital discharge or placement decision.

Q: What if the sibling doing everything will not hand anything off?

A: Offer one named role rather than general help, with a task and a date, so letting go is small and specific. The pattern is a familiar one to the Family Caregiver Alliance: many caregivers say they want help but discourage it. Record what is decided where everyone can see it. When talks keep stalling, her Family Dynamics page lists professional mediation among what helps, and these questions for a mediator or elder law attorney help a family walk into that room prepared.

Citations

• Alzheimer’s Association, Legal Documents. Confirms that a power of attorney does not let the agent override a person with dementia’s own decisions while that person has legal capacity, and that guardianship is generally considered when the family is unable to agree on the care needed. https://www.alz.org/help-support/caregiving/financial-legal-planning/legal-documents
• Alzheimer’s Association, Planning Ahead for Legal Matters. Defines legal capacity, notes that the level required can vary from one document to another, and explains why earlier planning lets the person with dementia take part and designate decision makers. https://www.alz.org/help-support/caregiving/financial-legal-planning/planning-ahead-for-legal-matters
• Alzheimers.gov (National Institute on Aging), Planning After a Dementia Diagnosis. Federal guidance that dementia symptoms make clear thinking harder over time and that financial directives must be created while the person still has legal capacity. https://www.alzheimers.gov/life-with-dementia/planning-after-diagnosis
• Family Caregiver Alliance, Caregiving and sibling relationships: challenges and opportunities. Describes how one sibling generally takes on the primary caregiving role, how that can leave the caregiver resentful and the others feeling left out, and recommends dividing tasks by each person’s abilities and circumstances. https://www.caregiver.org/resource/caregiving-and-sibling-relationships-challenges-and-opportunities/
• Family Caregiver Alliance, Caregiving with Your Siblings (Francine Russo). Shows how the primary caregiver role can start with small tasks for the sibling nearby, why the responsible sibling need not take on everything, and that many caregivers discourage the help they ask for. https://www.caregiver.org/resource/caregiving-with-your-siblings/
• AARP and the National Alliance for Caregiving, Caregiving in the US 2025. National survey of 6,858 caregivers. It finds 56 percent felt they had no choice in taking on caregiving, and that those caregivers report isolation at 34 percent against 12 percent and have unpaid help less often, 51 percent against 56 percent. https://www.aarp.org/content/dam/aarp/ppi/topics/ltss/family-caregiving/caregiving-in-us-2025.doi.10.26419-2fppi.00373.001.pdf
• Consumer Financial Protection Bureau, Managing Someone Else’s Money: Help for agents under a power of attorney. Lists the four fiduciary duties of an agent under a power of attorney (act only in the person’s best interest, manage their money and property carefully, keep it separate, keep good records) and suggests sharing accountings or summaries of spending with family unless the principal has said not to. https://files.consumerfinance.gov/f/documents/cfpb_msem_national_agents_guide.pdf

Related reading

• Can Siblings Share Power of Attorney? Joint, Several and Successor Appointments, and What Each One Costs a Family
• 7 Questions to Ask a Mediator or Elder Law Attorney When Siblings Can’t Agree on Power of Attorney
• 12 Caregiver Burnout Warning Signs You Should Not Wait Out
• What Is a Far-Away Sibling’s Job When a Parent Has Dementia?
• 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.