LPA vs Will UK (2026): What Is the Difference and Do You Need Both?

The fundamental difference is WHEN each document applies and what it covers: An LPA (Lasting Power of Attorney) applies DURING YOUR LIFETIME, specifically when you lose mental capacity. If you have a stroke, develop dementia, or are otherwise unable to manage your own affairs, your attorney can step in and act on your behalf. The LPA gives someone the legal authority to manage your finances, make healthcare decisions, or both — but ONLY while you are alive. The moment you die, the LPA ceases to have any legal effect. It becomes void on death. A will applies ONLY ON YOUR DEATH. Your will has absolutely no legal effect until the moment of your death. It cannot be relied upon to authorise anyone to manage your affairs while you are alive. Your executor has no authority to act until you have died and, strictly speaking, until a Grant of Probate has been obtained. There is a critical gap that catches many families off guard: if you have a will but no LPA, and you lose mental capacity before you die, no one has automatic legal authority to manage your finances, sell your property, or make healthcare decisions on your behalf. The only solution is a Court of Protection Deputyship — which takes 6-12 months, costs £1,500-4,000+, and gives you far less flexibility than an LPA made while you had capacity. Summary: (1) LPA → incapacity → you are alive; (2) Will → death → you have died; (3) You almost certainly need BOTH.

No — an LPA and a will cannot substitute for each other. They address entirely different legal problems: (1) An LPA cannot substitute for a will: an LPA gives your attorney authority to manage your affairs while you are alive. It confers NO right to inherit your estate, NO authority over your estate on death, and NO ability to distribute your assets. When you die, the LPA becomes void. The attorney's authority ends at the moment of death. If you die without a will, the intestacy rules (AEA 1925) apply regardless of whether your attorney had been managing your affairs for years; (2) A will cannot substitute for an LPA: a will has NO legal effect until death. It confers NO authority on your executor to act while you are alive. If you have a will but lack an LPA and lose mental capacity, your executor cannot step in to help. They have no authority to manage your bank accounts, make investment decisions, or deal with your property. The only pathway is Court of Protection Deputyship — potentially lengthy and expensive; (3) Common misconception — 'my spouse/partner can handle it': a surviving spouse has no automatic authority to access a joint account held in the sole name of the incapacitated person, or to sell a property held in the sole name of the incapacitated person, or to make healthcare decisions for the incapacitated person. The institution will ask for a registered LPA. Without one, an emergency Deputyship application is required; (4) Another common misconception — 'a will covers everything': a will covers distribution of the estate on death. It does NOT cover who cares for you if you become ill, who manages your finances if you are incapacitated, who can authorise medical treatment if you cannot consent, or who can sell the house if you move into a care home. These all require an LPA.

LPA — Property and Financial Affairs (LP1F): (a) managing bank and building society accounts; (b) investing savings; (c) paying bills; (d) collecting pension, benefits, and income; (e) selling or buying property (can be done immediately on registration if the donor authorises, OR only when the donor lacks capacity — donor specifies); (f) managing business interests (shareholder rights; not directorship itself); (g) claiming tax reliefs and managing HMRC correspondence; (h) making gifts, but only within HMRC annual exemption limits (s.19 IHTA 1984) unless the Court of Protection authorises larger gifts. LPA — Health and Welfare (LP1H): (a) where the donor lives (including care home placement); (b) day-to-day care decisions; (c) medical treatment decisions; (d) life-sustaining treatment — ONLY if the donor has expressly authorised the attorney to make this decision in the LPA. This is optional but important; (e) mental health treatment (limited); (f) personal welfare decisions (activities, clothing, diet). Health and Welfare LPA can ONLY be used when the donor lacks capacity — it never applies when the donor retains capacity. WILL: (a) who inherits the estate (specific gifts and residuary estate); (b) appointment of executor(s) and their powers; (c) appointment of guardian(s) for minor children under CA 1989 s.5 — this is the ONLY legal mechanism to appoint a guardian; (d) testamentary trusts for minor children or other beneficiaries; (e) instructions on funeral arrangements (not legally binding on executors, but influential); (f) gifts to charity; (g) provisions to reduce IHT (RNRB claims, spousal exemption, trust structures). What a will CANNOT do: authorise anyone to act while you are alive; override joint tenancy survivorship; override pension expression of wishes; bind surviving mirror will maker.

No — an LPA has absolutely no legal effect after death. It does not become a will or give the attorney any authority over the estate. This is a common misconception, particularly where an attorney has been acting under an LPA for a long period before death (for example, during a lengthy period of dementia). On death: (1) The LPA is revoked by operation of law — the attorney's authority ends immediately; (2) The executor named in the will (or the administrator appointed under Letters of Administration) takes over; (3) The attorney has no authority to continue managing accounts, dealing with property, or instructing solicitors on behalf of the estate; (4) The attorney CANNOT use the LPA to inform banks of the death, close accounts, or access estate funds — these are estate administration functions requiring the Grant of Probate; (5) If the attorney is also named as executor in the will, they can act as executor — but in that capacity, deriving their authority from the will, not the LPA; (6) Any actions taken by the attorney after the date of death are unauthorised and potentially constitute a breach of fiduciary duty and fraud. The correct sequence: attorney acts under LPA while person is alive and lacks capacity → person dies → attorney's LPA authority ends → executor/administrator acts under Grant of Probate/Letters of Administration. If the same person is both attorney and executor, they switch roles at death — they must be clear in their own record-keeping which capacity they are acting in at any given time.

The short answer is: BOTH, as soon as possible, before any health concerns arise. The longer answer: WHEN TO MAKE AN LPA: (1) The optimum time is when you have full mental capacity and no immediate health concerns — in your 30s, 40s, or 50s, ideally when you make your will. LPAs cannot be made retrospectively once capacity is lost; once you lose capacity, the only option is Court of Protection Deputyship; (2) If you have a health condition that may affect capacity in the future (early dementia diagnosis, MS, Parkinson's, stroke history), making an LPA immediately is urgent; (3) The OPG registration process takes 8–20 weeks — start early; (4) An LPA made at a younger age is not wasted — it simply sits in a drawer until needed, and can be revoked at any time while you retain capacity if your circumstances change; (5) Cost: OPG fee £82 per LPA (LP1F + LP1H = £164). WillSafe UK LPA Guidance Pack £25 for the preparation process. Court of Protection Deputyship £1,500–4,000+ if no LPA; WHEN TO MAKE A WILL: (1) When you have assets, a partner, or anyone who depends on you — i.e. as an adult; (2) Immediately if you are cohabiting (your partner inherits NOTHING under intestacy); (3) Immediately if you have minor children (guardian appointment under CA 1989 s.5 is only possible via a will); (4) When you get married (marriage revokes an existing will under WA 1837 s.18); (5) When you get divorced (divorce voids gifts to ex-spouse under s.18A but does not revoke the will — a new will is advisable); (6) Review every 5 years and after every major life event. CONCLUSION: Make both as part of a single estate planning exercise. The WillSafe UK Essentials Bundle (£89.99) covers a will, LPA guidance, letter of wishes, and executor guide in one package.