Council Tax SMI Form Wales: GP Certificate, Qualifying Benefits and Application Process

Where to Get the Form

Each Welsh council provides its own SMI application form, which includes a section for the GP to complete and sign. The form is sometimes called a "significant cognitive impairment" (SCI) form — Cardiff uses this terminology — but the legal test is identical.

You can usually download the form from your council's website or request one by phone:

• Cardiff: "Significant cognitive impairment" form, available through cardiff.gov.uk or by calling 029 2087 2087
• Swansea: SMI application form through the online portal or revenues department (01792 635382)
• Wrexham: Download from MyAccount portal or contact 01978 298993
• Gwynedd: PDF application available in English and Welsh from gwynedd.llyw.cymru

If you can't find your council's specific form, ask your council how to submit the application and supporting evidence.

What the GP Signs (and Doesn't Sign)

The doctor's certificate section asks the GP (or consultant psychiatrist) to confirm that the person has a severe impairment of intelligence and social functioning which appears to be permanent. This wording appears in Regulation 10 of W.S.I. 2026/8; it was previously set out in Section 6(4) of the Local Government Finance Act 1992.

The GP is not certifying a specific diagnosis. They're certifying that the person's condition causes a severe impairment that appears permanent. A diagnosis of dementia, stroke damage, or learning disability alone does not establish that the statutory test is met; the GP must assess the person's individual circumstances.

The GP cannot charge you a fee. Under BMA guidance and the NHS general medical services contract, signing a statutory council tax SMI certificate is not a private medical report. If the surgery receptionist asks for payment, explain that this is a free statutory certificate and escalate to the practice manager if needed.

Date matters enormously. The certificate should record the date the impairment became permanent, not the date the form is physically signed. If the GP writes today's date when the person has had advanced dementia for three years, you lose three years of backdating. Ask the GP specifically to state the date they believe the severe impairment was established.

Which Benefits Qualify

The person must be entitled to at least one of these — "entitled" means meeting the conditions, even if they haven't claimed or aren't currently being paid:

The most common qualifying benefits for dementia and stroke patients are Attendance Allowance (for those over state pension age) and PIP daily living (for those under state pension age). If the person receives one of these, you already have the benefit half of the dual-lock test covered.

Submitting the Application

Once you have the completed form (with the GP's signed certificate) and evidence of benefit entitlement, such as a benefit award letter:

1. Submit both to your council's revenues department — online, by post, or by email depending on the council
2. Specify the backdating date — state clearly that you're requesting the disregard from the date the impairment became permanent and the qualifying benefit began (whichever is later)
3. Keep copies of everything — including proof of postage if sending by mail

The council will verify the benefit entitlement and, if everything is in order, apply the disregard and adjust your bill. If the disregard results in a backdated refund, ask the council when the credit or direct payment will be processed.

If the GP Refuses to Sign

Some GPs are reluctant — they may not be familiar with the SMI certificate, may confuse it with a capacity assessment, or may believe the impairment isn't yet "severe enough." If this happens:

• Provide the GP with the statutory definition and explain what the certificate requires (permanent severe impairment of intelligence and social functioning — not a specific diagnosis)
• Ask whether the person could live independently, manage their finances, or navigate daily activities without constant support — if the answer is no, the threshold is likely met
• If the GP still declines, request a referral to a consultant psychiatrist or neurologist for a second opinion
• Contact Age Cymru (0300 303 4498) or Citizens Advice Cymru (0800 702 2020) for support in navigating GP resistance

The Council Tax Discounts and Exemptions in Wales guide includes a GP certificate request letter template designed specifically for this situation — written to give the doctor the statutory context and the confidence to sign.

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