Council Tax Discounts for Severe Mental Impairment Could Save Households Thousands
Millions of households facing rising council tax bills from April 2026 could significantly reduce their payments or even eliminate them entirely if a resident has a qualifying long-term condition. According to Martin Lewis, founder of Money Saving Expert (MSE), support is available through a council tax discount linked to Severe Mental Impairment (SMI).
To be eligible, individuals must have a formal diagnosis from a doctor confirming a permanent impairment affecting intelligence and social functioning, and they must be receiving specific benefits. The discount can reduce bills by at least 25%, and in some cases, wipe them out completely, offering substantial savings for eligible households.
Understanding the Severe Mental Impairment Discount
The SMI council tax discount is a reduction of a household's bill, ranging from a minimum of 25% up to the entire bill being eliminated. SMI is a medical diagnosis itself, but underlying causes can include conditions such as dementia (including Alzheimer's), profound learning difficulties, multiple sclerosis, the result of a severe stroke, or other permanent cognitive impairments.
Speaking on a previous episode of The Martin Lewis Money Show on ITV, the finance expert explained, "A severe mental impairment - horrible term not mine - is defined as a severe mental impairment of intelligence and social functioning which appears to be permanent. To qualify for a discount, it must be medically certified; you need a doctor to sign."
How Much You Could Save Based on Household Composition
The level of discount depends on who lives in the household:
- 100% discount – if the person with SMI lives alone or only with people not counted for council tax, such as under-18s or full-time students.
- 50% discount – if they live with an adult carer.
- 25% discount – if they live with one other qualifying adult.
- No discount – if they live with two or more non-qualifying adults.
In some cases, households may not have to pay any council tax at all if everyone in the property is disregarded for council tax purposes. For example, a household where someone with an SMI lives with an under-18 will receive a 100% discount.
Conditions That May Qualify for the Discount
To be eligible, two main criteria must be met. First, the person must be medically certified as having a severe mental impairment. Conditions that may be considered include:
- Dementia, including Alzheimer’s disease
- Parkinson’s disease (in severe cases affecting cognition)
- Multiple sclerosis
- Severe learning disabilities
- The effects of a severe stroke
- Schizophrenia or schizoaffective disorder
- Other permanent cognitive impairments
However, a diagnosis alone is not sufficient; a doctor must confirm the condition meets the definition of SMI.
Benefit Rules and Application Process
In addition to medical certification, the person must usually receive at least one qualifying benefit, such as:
- Incapacity benefit
- Attendance allowance
- Severe disablement allowance
- Disability living allowance (higher or middle-rate care component)
- Increase in disablement pension (due to constant attendance being needed)
- Unemployability supplement or allowance
- Constant attendance allowance
- Income support (which includes a disability premium)
- Personal independence payment (standard or enhanced daily living component)
- Armed forces independence payment
Eligibility rules may differ slightly in Scotland. Previously, in England and Wales, eligibility could be based on entitlement to certain benefits rather than actual receipt, but this changed following a High Court ruling, meaning stricter rules now apply.
To apply, households need to contact their local council and provide evidence of diagnosis along with details of benefits received. If approved, the discount is applied directly to the council tax bill, potentially offering significant financial relief for those affected by long-term conditions.
