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Council Tax severe mental impairment discount explained

What the Council Tax severe mental impairment rules require, how disregards affect a household and why the name of the scheme should not be used as a judgement about a person.

Last reviewed: 6 July 2026 · UK guidance

In brief

For Council Tax, “severe mental impairment” is a legal term with a specific test. It normally requires medical certification and entitlement to a qualifying benefit, even if that benefit is not actually being paid in some circumstances. The council decides the application.

The outcome depends on who else lives in the property. One person may be disregarded, the household may receive a discount, or an exemption may apply where all residents meet relevant disregard rules. It is separate from Council Tax Support.

Check both parts of the test

Ask the council for its form and current qualifying-benefit list. The medical professional certifies the impairment element; the council checks the benefit and household conditions. A diagnosis by itself is not the complete Council Tax test.

Map the adults in the home

List every adult and whether another disregard applies, such as full-time student or qualifying carer. The bill reduction is based on the counted adults after disregards. Ask the council to explain the calculation, not only whether the person qualifies.

Ask about the start date

The relevant circumstances may have begun before the application. Request the council’s evidence requirements for an earlier effective date and provide benefit-award and medical dates. Backdating can involve substantial bills, so seek advice if the council limits the period without explanation.

Handle the process respectfully

Use the statutory term only where needed. A person may require support completing the form or giving consent. Ask for accessible communication and avoid circulating medical information beyond the council and certifying professional.

A council enquiry

Use this to check the rule and household effect.

I want to apply under the Council Tax severe mental impairment rules for [name]. Please send the current form and qualifying-benefit list, explain the medical certification, tell me how the other adults in the property affect the bill, and confirm what evidence is needed for the earliest possible start date.

A practical checklist

  • Obtain the council’s current form.
  • Check medical certification and qualifying benefit.
  • List all adults and other disregards.
  • Ask for the calculation and effective date in writing.

Check the current information

These are the most relevant official or specialist places to confirm live rules, availability and application details.

Council Tax discounts for disabled people — GOV.UK

gov.uk

Open official information
Find your local council — GOV.UK

gov.uk

Open official information
Benefits and financial support

gov.uk

Open official information

Council Tax Support

A plain-English guide to reducing a Council Tax bill through means-tested support, disability-related reductions, discounts and exemptions that are often confused with one another.

Read this guide

Council Tax Reduction, disability discounts and disregards

How disability can affect Council Tax through income support, band reduction and disregards—and why each needs a separate check.

Read this guide

The Essential Checklist for Applying for Local Council Tax Reductions

A practical evidence and form checklist for Council Tax Support and separate discounts, with safeguards against applying for the wrong thing.

Read this guide

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