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What is the Council Tax discount for severe mental impairment?

For families of people with dementia or a similar condition who pay Council Tax.

Applies to: England, Scotland, Wales Last checked against official sources: 6 October 2026

People with a severe mental impairment, such as dementia, are not counted for Council Tax, which can mean a discount or no bill at all.

  • You need a certificate from a doctor and must get a qualifying benefit.
  • In England, it is 100% off if the person lives alone or only with others who qualify or full-time students.
  • It is 50% off if everyone else in the home is disregarded.
  • You get 25% off if you live with someone who qualifies and no other adults count.

Different in Wales and Scotland

  • Wales: it is called significant cognitive impairment, and there is no reduction if the person lives with 2 or more adults who pay Council Tax.
  • Scotland: apply to your council using a form your doctor signs.

Different in Scotland, Wales or Northern Ireland

Rules may be different in:

  • Northern Ireland: Check nidirect for Northern Ireland

Key facts

  • Needs doctor's certificate
  • Plus a qualifying benefit
  • Up to 100% off
  • Apply to your council

What severe mental impairment means

For Council Tax, a person is severely mentally impaired if they have a severe impairment of intelligence and social functioning (however caused) which appears to be permanent. This is the wording in the law.

The Welsh Government gives examples of conditions that can count. In Wales this is now called a significant cognitive impairment. Examples include Alzheimer's disease, Parkinson's disease, severe learning difficulties, a stroke and other forms of dementia. What matters is how the condition affects the person, and that it looks permanent.

Who can get it

To qualify, the person must:

  1. Have a certificate from a doctor confirming the impairment, and
  2. Get a qualifying benefit. Your council will tell you which ones count.

The Welsh Government lists 11 qualifying benefits. They include:

  • Attendance Allowance
  • Disability Living Allowance (middle or higher rate care part)
  • Personal Independence Payment (standard or enhanced rate)
  • Universal Credit, where the person has limited capability for work or work-related activity
  • Severe Disablement Allowance
  • Income Support that includes a disability premium
  • Armed Forces Independence Payment

How much off the bill

A person with a severe mental impairment is "disregarded". This means they are not counted when the council works out how many adults live in the home. The discount depends on who else lives there.

HouseholdDiscount in England
The person lives alone, or only with other people who qualify or full-time students100%
The person lives with others who are all disregarded50%
You live with someone who qualifies and there are no other adults, or everyone else is disregarded25%

The disabled person does not have to be the person who pays the bill. Anyone in the home can qualify.

How to apply

  1. Contact your local council and ask for its severe mental impairment form.
  2. Ask the person's doctor to sign the medical part.
  3. Send proof of the qualifying benefit.

Discounts are never automatic. If you think you qualify, apply as soon as possible. If you get a discount and your situation changes, tell the council, or you could be fined.

If you live in Scotland, Wales or Northern Ireland

  • Wales: the condition is called a significant cognitive impairment. A person who lives alone, or only with others who are certified, is exempt. Living with 1 adult who pays Council Tax gives a 25% discount. Living with 2 or more adults who pay gives no reduction. A carer who gives at least 35 hours of care a week may also not be counted. An annex lived in by a dependent relative who is certified can be exempt.
  • Scotland: the same help is described as being for people with significant cognitive difficulties. You apply to your council, using a form your doctor signs.
  • Northern Ireland: there is no Council Tax. Domestic rates apply instead, and there is a separate Disabled Persons Allowance for adapted homes.

Related guides

Where this comes from

Get it done

This takes you to the official service, which is free to use.

Check Council Tax discounts

Common questions

Does dementia count as severe mental impairment?

It can. The Welsh Government lists Alzheimer's disease and other forms of dementia as examples.

Which benefits qualify?

They include Attendance Allowance, the middle or higher DLA care rate, and PIP at the standard or enhanced rate.

Does the bill payer have to be the disabled person?

No. Anyone in the household can qualify.

Official sources

  1. 1.Council Tax: discounts for disabled people (GOV.UK)www.gov.uk/council-tax/discounts-for-disabled-people
  2. 2.Council Tax: severely mentally impaired (Welsh Government)www.gov.wales/council-tax-discounts-and-reduction/severely-mentally-impaired
  3. 3.Council Tax discounts, exemptions and reductions (mygov.scot)www.mygov.scot/council-tax/discounts-exemptions-and-reductions

Checked against GOV.UK on 6 October 2026

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