What it means
Most people meet the concept in two settings. Practical convenience, such as authorising a family member to manage accounts while the principal is abroad, and planning for incapacity, where the document exists so someone can act if illness or age removes the principal's ability to decide.
The timing of when the authority starts is the detail that causes the most confusion. A durable power of attorney takes effect on signing and continues if the principal loses capacity, while a springing power only comes into force when a defined event occurs, usually a doctor's certification of incapacity.
Scope should be stated deliberately rather than left to a standard form. A general power that covers everything is convenient but hands over enormous discretion, whereas a limited power can be confined to a single account, a single transaction or a fixed period.
The agent owes a fiduciary duty, meaning a legal obligation to act in the principal's interests rather than their own. In practice that means keeping the principal's money separate from their own, keeping records of every transaction, and avoiding decisions where the agent personally benefits.
It is worth being clear about what the document does not do. It gives no authority after the principal dies, at which point the executor named in the will takes over, and it is a separate instrument from a healthcare power of attorney that covers medical decisions.
Businesses encounter these documents more often than they expect. Banks, brokers and registrars all need to verify a power of attorney before letting an agent move money, and a poorly drafted or expired document is one of the more common reasons a transaction stalls at the last minute.
In practice
Real-world examples.
Example
A business owner spends six months setting up an overseas subsidiary and grants her finance director a limited power of attorney covering only the company's domestic operating account and payroll approvals. The document names the specific account, caps single payments at $50,000 and expires automatically after nine months.
Example
An adult daughter holds a durable power of attorney for her father, who has been diagnosed with dementia. She uses it to pay his care home fees, file his tax return and sell a rental property, keeping a separate ledger of every payment because his other children will eventually review the estate.
Example
A property investor travelling for work grants a solicitor a one-off power of attorney to complete a purchase and sign the transfer documents on a fixed date. The authority is limited to that single transaction and lapses once completion is registered.
Case study
Seen in the real world.
The following is an illustrative and entirely fictional situation. Hollisford Joinery, an invented family cabinetmaking business, was run by its founder until a stroke left him unable to manage his affairs. He had signed a general durable power of attorney four years earlier naming his son as agent, which meant the business bank accounts, supplier payments and payroll could continue without a court application.
The illustrative complication arrived a year later. The son, who also owned a separate supplier company, had been routing timber purchases to his own firm at prices roughly 15% above the market rate, amounting to about $88,000 over the period. When his sister asked for records, the son had none beyond bank statements, because the document had not required accounting to anyone.
In this fictional case the family settled without going to court, but the episode illustrates two ordinary safeguards that had been omitted: a requirement that the agent provide an annual statement of transactions to a named third party, and an explicit prohibition on self-dealing unless approved in writing. Both are single paragraphs in a well-drafted document and both would have prevented the dispute.
Watch out
Common mistakes.
- Assuming a standard general power of attorney is fine for every purpose, when many banks and registrars insist on their own forms or on specific wording before they will act.
- Signing a springing power without defining precisely who certifies incapacity and how, which frequently leaves the agent unable to act at the exact moment the document was written for.
- Believing the authority continues after death, when it ends immediately and control passes to the executor named in the will.
Questions
People also ask.
What is the difference between a durable and a non-durable power of attorney?
A durable one survives the principal losing mental capacity, while a non-durable one ends at that point, which defeats the usual reason for having it.
Can a power of attorney be cancelled?
Yes, the principal can revoke it at any time while they still have capacity, though the revocation should be given in writing to the agent and to every institution holding a copy.
Does the agent get paid?
Family members usually act without a fee, while professional agents such as solicitors or trust companies charge, and any payment arrangement should be written into the document rather than assumed.
From the founder's library

Take it further with the book.
Build your financial confidence beyond this definition. Shihan's full-length guide, Accounting Fundamentals, takes the same plain-English approach and turns it into a complete, practical playbook for non-finance managers, business owners and students - with chapter-end quiz answers and presentation slides included.
25% off with code MMHQ25, applied at checkout. Priced in USD - checkout may show the equivalent in your local currency.
View the book and save 25%Related
