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Mental Capacity Act 2005

A general guide on how the Mental Capacity Act affects you and how you can plan ahead for when you no longer have the mental capacity to make decisions for yourself.


If you can’t make decisions for yourself because you don’t have the mental capacity to make them, the Mental Capacity Act 2005 tells you what you can do to plan ahead, how you can ask someone else to make decisions for you and who can make decisions for you if you haven't planned ahead.

Quick facts

The Mental Capacity Act says you have these rights:

  • You will be assumed to have capacity, unless you have had an assessment showing you don't.
  • All decisions made for you when you have lost capacity should be made in your best interests.
  • Your liberty can only be taken away from you in very specific situations - this is called a deprivation of liberty, and it should only be used if it is the least restrictive way of keeping you safe or making sure you have the right medical treatment.
  • You may have the right to get support from an advocate in certain circumstances. This is someone who listens to what you want and can speak for you, if you want, but does not have the legal authority to make financial or personal decisions for you.
  • A deputy is a person appointed by the court to make financial or personal decisions for you, once you have lost capacity to make those decisions for yourself.
  • If there are any doubts as to what an advance decision means, or what an attorney under a lasting power of attorney or a deputy is allowed to do, the Court of Protection can make a decision about these things.

The Mental Capacity Act also tells you how you can plan ahead:

  • You can appoint an attorney. This is a person you appoint, while you have capacity, to make financial or personal decisions for you for a time when you have lost capacity.
  • You can make an advance decision. These cover refusals of treatment only and are legally binding. You could also make an advance statement. Advance statements cover a wider range of issues and are not legally binding, but your wishes and feelings should be consulted once you have lost capacity. Mind and Compassion in Dying's factsheet has further information on advance decisions and advance statements.

This information was published in November 2017.

This page is currently under review. All content was accurate when published. 

References are available on request. If you would like to reproduce any of this information, see our page on permissions and licensing.

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