Can a Will Replace an LPA?
A will and an LPA serve completely different purposes — one cannot substitute for the other.
Written by Anthony Dalton · Reviewed by James Tyrrell · Last reviewed
"I already have a will, so I am covered." It is one of the most common — and most dangerous — assumptions in personal legal planning. A will and a Lasting Power of Attorney (LPA) are fundamentally different legal documents that operate at different times and serve entirely different purposes. Put simply, a will deals with what happens after you die. An LPA deals with what happens while you are still alive but can no longer make decisions for yourself. One cannot substitute for the other.
At a glance
- No, a will cannot replace an LPA — they serve completely different purposes
- A will only takes effect after death; an LPA operates during your lifetime if you lose mental capacity
- Without an LPA, your family may need to apply to the Court of Protection (costing over £1,000 and taking months)
- You need both documents for complete protection — the LPA covers your lifetime and the will covers your estate after death
The Fundamental Difference: Life vs Death
The single most important distinction between a will and an LPA is when each takes effect:
- A will only takes effect after you die. It has absolutely no legal force while you are alive. Your executors have no authority to act on your behalf during your lifetime
- An LPA operates during your lifetime. It gives your chosen attorney the legal authority to make decisions on your behalf if you lose the mental capacity to make them yourself
There is a critical gap between these two documents. If you become seriously ill, suffer a brain injury, or develop dementia, you may be unable to manage your own affairs for months, years, or even decades before your will comes into effect.
During this period, without an LPA, nobody — not your spouse, not your children, not your executors — has the automatic legal authority to manage your finances, pay your bills, sell your property, or make decisions about your medical care.
Key point: A will controls what happens to your assets after death. An LPA controls who can act on your behalf while you are alive but unable to make decisions. They cover entirely different periods of your life.
What a Will Does and Does Not Cover
A will is an essential legal document that sets out your wishes for after your death. It typically covers:
- How your assets (property, savings, investments, possessions) should be distributed
- Who should be the executor responsible for administering your estate
- Who should be the guardian of any minor children
- Any specific gifts or bequests to individuals or charities
- Funeral wishes (though these are not legally binding)
What a will does not cover includes:
- Managing your finances while you are alive but incapacitated
- Paying your bills, mortgage, or care home fees during your lifetime
- Making decisions about your medical treatment or care
- Selling or managing your property while you are alive
- Accessing your bank accounts or investments during your lifetime
What Happens Without an LPA
If you lose mental capacity and do not have an LPA in place, your family will face a difficult and expensive situation. The only option available to them is to apply to the Court of Protection for a deputyship order. This process involves:
- A court application costing £371 in court fees, plus a £100 assessment fee
- Legal costs that can easily reach £1,000 to £3,000 or more if a solicitor is involved
- A waiting period that can take many months — during which nobody can act on your behalf
- Ongoing supervision fees and annual reporting requirements for the appointed deputy
- The court choosing who will manage your affairs — which may not be the person you would have chosen
By contrast, an LPA costs just £92 to register with the OPG, you choose exactly who will act for you, and it can be used as soon as it is needed without any court involvement. For a fuller explanation of the consequences, see our guide on what happens without an LPA.
How a Will and LPA Work Together
Rather than being alternatives, a will and an LPA complement each other as part of a comprehensive plan for the future. Together, they ensure that your affairs are properly managed both during your lifetime and after your death:
- While you have capacity — you manage your own affairs as normal. Both documents exist but neither is actively in use
- If you lose capacity — your LPA comes into effect. Your attorney manages your finances, property, and (if you have a Health and Welfare LPA) your care and medical decisions. Your will remains dormant
- After your death — your LPA ceases to have effect. Your will takes over, and your executor distributes your estate according to your wishes
This seamless handover from LPA to will ensures that there is always someone authorised to act on your behalf, no matter what happens. As our guide on how LPAs work alongside wills explains, these documents are designed to be part of the same planning process.
Key point: Think of a will and an LPA as two halves of the same plan. The LPA protects you during your lifetime; the will protects your family after your death. You need both.
Why Relying on a Will Alone Leaves You Exposed
Believing a will is "enough" leads people to think they are fully protected when, in fact, there is a significant gap in their coverage. Consider the following scenarios:
- A 65-year-old has a comprehensive will but no LPA. She develops dementia. Her husband cannot access her bank accounts, sell their jointly-owned holiday home, or make decisions about her care. He must apply to the Court of Protection — a process that takes eight months and costs over £2,000
- A 50-year-old business owner has a will leaving everything to his children. He suffers a stroke and cannot manage his company. His will is irrelevant because he is still alive. Without an LPA, nobody can step in to run the business, and it may collapse while the family waits for a court order
- A married couple both have wills but only one has an LPA. When the partner without an LPA develops Alzheimer's, the other spouse discovers they have no legal authority to manage their partner's separate assets or make medical decisions on their behalf
Each of these situations could have been avoided entirely by creating an LPA alongside the will. The cost is modest — £92 per LPA to register — and the process can be completed in a matter of weeks.
Take Action: Create Both Documents
If you already have a will, you have taken an important step — but your planning is only half complete. Creating at least one LPA (and ideally both a Property and Financial Affairs LPA and a Health and Welfare LPA) will ensure that you are fully protected during your lifetime as well as after your death.
The key thing to remember is that you must create an LPA while you still have the mental capacity to do so. Unlike a will, which can be created at any time, an LPA cannot be made once you have lost capacity. If you wait too long, the option is no longer available, and your family will be left with the expensive and time-consuming Court of Protection route as their only alternative.
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Key Takeaways
- A will has no power during your lifetime — your executor has absolutely no legal authority while you are alive, even if you lose capacity
- An LPA fills the gap a will cannot — it gives your chosen attorney authority to manage finances, property, and health decisions while you are alive but incapacitated
- Court of Protection is the costly alternative — without an LPA, deputyship costs £371+ in court fees, £1,000 to £3,000+ in legal costs, and takes months to arrange
- Same person can serve both roles — you can appoint the same trusted person as your LPA attorney and your executor for seamless continuity
- Create your LPA while you have capacity — unlike a will, an LPA can only be made while you have mental capacity; if you wait too long, the option disappears
Got Questions? Here Are the Answers
Does my executor have any authority while I am still alive?
No. An executor named in your will has absolutely no legal authority during your lifetime. Their role only begins after your death when they apply for probate. Only an attorney appointed under an LPA can act on your behalf while you are alive.
Can I appoint the same person as my executor and my LPA attorney?
Yes, and many people do. Appointing the same trusted person as both your executor and your LPA attorney ensures continuity, as they can manage your affairs during your lifetime under the LPA and then handle your estate after death under the will.
If I already have an LPA, do I still need a will?
Yes. An LPA ceases to have effect when you die, so it cannot control what happens to your estate. Without a will, your assets will be distributed according to intestacy rules, which may not reflect your wishes. You need both documents for complete protection.
This guide was last reviewed and updated on . Information is based on current legislation and OPG guidance for England and Wales.
Official Guidance
Further reading from GOV.UK
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