How Long Does a Power of Attorney Last? Expiration, Incapacity, and Death

A power of attorney can last for decades or die in a year — it depends on how it was drafted and what happens to the people involved. Here are the five events that end a POA, in the order families usually encounter them, with the Wisconsin rules that apply to each.

1. The Expiration Date You Wrote In (Most Have None)

A POA lasts as long as its own terms say. If the document names an end date or a triggering condition — "until December 31, 2027" or "while I am out of the country" — it expires on those terms. Most durable POAs have no expiration date at all and remain valid indefinitely, which is exactly what you want for incapacity planning.

Note what does not expire a POA: age. A 15-year-old durable POA is still legally valid in Wisconsin. Banks sometimes grumble about "stale" documents, but under § 244.20 a bank cannot refuse a properly acknowledged POA simply because it is old.

2. Incapacity — The Fork Between Durable and Non-Durable

This is where drafting decides everything:

• Non-durable (general) POA: ends the moment the principal loses capacity. It was built for convenience during absences, not for illness.
• Durable POA: continues through incapacity. Under Wisconsin Chapter 244, financial POAs are durable by default — they survive unless the document explicitly says otherwise.

Wisconsin's healthcare POA (Chapter 155) works in reverse: it only begins at incapacity, when two physicians certify it in writing. For the full comparison, see general vs durable power of attorney.

3. Revocation — You Can End It Any Time

As long as the principal has capacity, they can revoke a POA at any time, for any reason. Key Wisconsin rules:

• Signing a new POA does not automatically revoke an old one — the new document must explicitly state that all prior powers of attorney are revoked.
• Revocation should be written, signed, ideally notarized, and delivered to the former agent and every institution holding a copy. A bank honoring an old POA it was never told about is a mess you want to avoid.
• Divorce filing is automatic revocation: if a principal files for divorce, annulment, or legal separation in Wisconsin, the spouse's authority as agent terminates by operation of law (§ 244.07), unless the document's Special Instructions say otherwise.

4. Guardianship Does Not End It — But the Court Can

If a court appoints a guardian or conservator after a POA exists, the POA does not automatically terminate. Under § 244.08 the agent keeps authority but becomes accountable to the court-appointed fiduciary, who can limit, suspend, or terminate the agent's powers only with court approval. Courts can also strip an agent's authority on petition by interested persons (spouse, heirs, county adult-at-risk agencies) under § 244.16 if the agent is mismanaging or abusing the role.

5. Death — The Absolute End

This is the one people get most wrong: every power of attorney in Wisconsin — durable, springing, healthcare, financial — terminates immediately when the principal dies. Not when the death certificate is filed. At death. The agent's authority does not taper off; it ceases to exist.

An agent who keeps paying bills, moving money, or "tidying up the accounts" after the principal's death is acting without any legal authority and can be personally liable to the estate and its heirs. The correct next steps after death:

• The personal representative named in the will (or appointed by the court) takes over.
• For estates under $50,000 in solely owned assets, heirs can use Wisconsin's transfer by affidavit process (Form PR-1831) instead of full probate.
• The person named in the Authorization for Final Disposition (Form F-00086) controls the funeral — a role that, unlike a POA, is designed to begin at death.

The Planning Takeaway

A well-built durable POA lasts exactly as long as it should: from signing until death, surviving incapacity in between. The failures come from documents that expired quietly (non-durable forms, written-in end dates) or from agents who did not know their authority died with the principal.

If you are putting Wisconsin documents in place, the Wisconsin Power of Attorney Kit covers the durability defaults, the revocation procedure, and the handoff map for what happens at death — so nobody in your family has to learn these boundaries from a bank's legal department.

See more Wisconsin guides →