Wills, Powers of Attorney, and Deputyship: What’s the Difference?

Wills, Lasting Powers of Attorney (LPAs), and deputyship all play different roles in planning for the future. A Will sets out what happens to your money, property, and possessions after death. LPAs allow someone you trust to make decisions for you while you’re alive but unable to act. Deputyship is a Court of Protection process used when a person lacks mental capacity to make decisions for themselves and has no LPA in place. Understanding the difference helps people make safe, lawful, and well-informed choices related to estate management.

Planning for the Future: Understanding Your Legal Options for Estate Decision-Making

Planning ahead is one of the most important steps you can take to protect your estate and support the people who may need to make decisions on your behalf. This process relies on understanding how legal options, such as Wills, Lasting Powers of Attorney (LPAs), and deputyship, operate at different stages of life. Each option plays a distinct role in managing your affairs, either after death or during periods of lost mental capacity.

How Do Wills, LPAs, and Deputyship Shape UK Estate Management?

Wills, LPAs, and deputyship orders are central to estate planning and to ensuring important decisions about money, property, and welfare are made safely and lawfully. Each option applies at a different point in time and offers its own form of protection under UK inheritance law and the Mental Capacity Act 2005. When used together, they provide clarity, continuity, and security for individuals and their families.

Understanding each legal option and the differences among them makes it easier to choose the right tools for your personal, financial, and long-term needs.

What Is a Will?

A Will is a legal document that states what should happen to your money, property, and personal belongings when you die. It allows you to:

  • Choose who inherits your estate (your beneficiaries)
  • Appoint executors to manage the probate process
  • Decide how property and assets should be distributed
  • Name guardians for children
  • Express preferences about personal items or funeral wishes

A Will takes effect after death, so it cannot be used to manage finances or welfare while you are alive.

To make a valid Will, you must:

  • Be 18 years or older
  • Make the decision voluntarily
  • Understand what you own and who might expect to inherit
  • Sign the document in front of two witnesses

This legal test is based on Banks v Goodfellow (1870), the court’s benchmark for testamentary capacity. If there is any doubt about someone’s ability to write or amend a Will, solicitors often request a testamentary capacity assessment to protect the testator and the estate.

For a more detailed overview of planning your estate, you may find our guide to inheritance and estate planning helpful.

What Is a Lasting Power of Attorney?

An LPA is a legal document that allows you to appoint someone you trust to make decisions on your behalf if you lose mental capacity in the future. LPAs must be made while you still have capacity.

There are two types of LPAs:

1: Property and Financial Affairs LPA

Covers decisions about:

  • Managing bank accounts
  • Paying bills or mortgages
  • Selling or managing property
  • Handling pensions and investments

2: Health and Welfare LPA

Covers decisions about:

  • Day-to-day care
  • Medical treatment
  • Where you live
  • Life-sustaining treatment decisions

LPAs apply during your lifetime, not after your death. Once death occurs, the LPA ends, and the executor named in the Will takes over management of the estate.

LPAs are powerful safeguarding tools. Without them, your family may need to apply to the Court of Protection for a deputyship order, which can be more costly, slower and require ongoing supervision by the court.

If you’re preparing or reviewing LPAs, you may find our dedicated guide to LPA assessments useful.

When no LPA is in place, and someone loses capacity, families usually have to turn to the Court of Protection for deputyship.

What Is Deputyship?

Deputyship is a legal process used when someone lacks mental capacity and does not have a valid Lasting Power of Attorney in place. In this situation, family members, professionals, or local authorities may apply to the Court of Protection to become a deputy.

There are two main types of deputyships:

1: Property and Financial Affairs Deputyship

The deputy can:

  • Pay bills
  • Manage bank accounts
  • Handle property sales
  • Manage debts
  • Oversee investments

2: Personal Welfare Deputyship

Less common, and usually only appointed when:

  • There is significant disagreement about the person’s care
  • Decisions about health and welfare require structured oversight

Deputies must follow the principles outlined in the Mental Capacity Act 2005, submit yearly reports to the court, and act in the person’s best interests at all times. Deputyship involves greater supervision and legal responsibility than acting as an attorney under an LPA.

If you want to understand more about deputyship, our Court of Protection assessment guide explains how mental capacity is assessed for these applications. You may also want to read our guide on applying for deputyship for a step-by-step outline of the process and how OFH Care can help.

How Do Wills, LPAs, and Deputyship Work Together?

Although all three documents relate to decision-making, each serves a different purpose. Understanding how they fit together helps families plan effectively.

Wills = After Death

A Will directs what happens to your estate after you die. It has no legal effect while you are alive.

LPAs = While Alive and Lacking Capacity

Lasting Powers of Attorney allow you to appoint attorneys to act on your behalf if you lose the ability to make decisions. They protect you from delays and uncertainty during illness, accident, or cognitive decline.

Deputyship = Last Resort

Deputyship fills the gap when no LPA exists. It is usually more expensive, more time-consuming, and monitored by the Court of Protection and the Office of the Public Guardian (OPG).

Together, They Form a Complete Plan

When used together, these documents:

  • Protect your finances
  • Secure your welfare
  • Support your family
  • Reduce conflict
  • Ensure your choices are respected

Here’s an example to help you understand.

Mr Howard, aged 78, makes a Will and appoints his daughter as executor. He also makes a dual LPA appointing her as attorney for both finance and health. Two years later, he develops dementia and loses capacity. In this situation:

  • The LPAs allow his daughter to manage his care and finances without delay.
  • After his death, she assumes the role of executor and manages the estate under his Will.

In this case, a deputyship order from the Court of Protection is not needed because Mr Howard had planned early.

If you want to learn more about the impact of capacity on long-term decisions, our articles on lifetime gifting and testamentary capacity provide useful context.

Will vs Power of Attorney vs Deputyship: Key Differences

Here’s a simple breakdown to make it simpler to understand:

 

Document

Used When?

Who Makes Decisions?

Purpose

Will

After death

Executors

Distributes estate to beneficiaries

LPA

During life, after loss of capacity

Chosen attorneys

Manages finances or welfare

Deputyship

During life, when no LPA exists

Court-appointed deputy

Manages finances or welfare under Court supervision

The key difference is control:

  • Will = you decide for after death
  • LPA = you choose who acts if needed
  • Deputyship = the court chooses because you didn’t

When Should You Seek a Capacity Assessment for Wills, LPAs, or Deputyship?

Mental capacity is important to all three legal processes. The Mental Capacity Act 2005 requires assessments to be decision-specific, meaning each decision (writing a Will, making an LPA, applying for deputyship) must be evaluated individually.

For Wills (Testamentary Capacity)

A capacity assessment may be needed when:

  • The person has dementia, brain injury, stroke, or fluctuating capacity
  • There are major changes to a previous Will
  • A family dispute is likely
  • A solicitor wants to avoid future challenges

This follows the Banks v Goodfellow test, still used by UK courts today.

For Lasting Powers of Attorney

An LPA requires the donor to understand:

  • Who they are appointing
  • What powers will the attorney have
  • The consequences of giving those powers
  • When the LPA will take effect

If there are doubts about understanding or undue influence, a formal mental capacity assessment for creating an LPA is needed.

For Court of Protection Deputyship Applications

A COP3 assessment is legally required to evidence that someone lacks the capacity to:

  • Manage property and financial affairs
  • Make decisions about their welfare
  • Understand risks around money or property

OFH Care regularly supports solicitors and families with COP3 reports, testamentary capacity assessments, LPA assessments, and gifting assessments.

Conclusion

Wills, LPAs, and deputyship all play important roles in safeguarding your future and protecting your estate. A Will ensures your money, property, and possessions are passed on according to your wishes. LPAs allow trusted individuals to make decisions if you lose capacity. Deputyship provides essential oversight when no LPA exists.

Planning early gives families clarity, prevents conflict, and ensures decisions remain legally sound. If you need support with capacity assessments for Wills, LPAs, gifts, or Court of Protection applications, OFH Care is here to help with clear, independent, and legally robust assessments.

Frequently Asked Questions

Find Out More About Wills, LPAs, and Deputyship Applications

Yes. A Will covers decisions after your death, while an LPA covers decisions during your lifetime. They do not overlap, and one cannot replace the other. Most people benefit from having both legal options in place.

If no lasting power of attorney exists, someone must apply for deputyship through the Court of Protection. This is usually a family member, a loved one, a carer or a professional deputy. Deputyship applications take longer, can cost more, and involve ongoing court supervision. An LPA avoids these delays.

No. Deputies are appointed by the court only when someone lacks capacity and no LPA exists. To choose who manages your affairs, you must create an LPA while you still have the mental capacity to appoint an attorney.

Choose someone reliable, trustworthy, and organised. Many people appoint a spouse, an adult child, or a solicitor. You can appoint more than one person and specify whether they must act jointly or independently.

Possibly. Capacity depends on understanding, not diagnosis. A person with early-stage dementia may still have capacity, but a formal assessment may be needed to prove the decision is valid.

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