SMI Council Tax Application Form and Process in England

There Is No National Form

Council tax in England is administered by 296 local billing authorities — London boroughs, metropolitan boroughs, unitary authorities, and shire districts. Each has its own SMI application form, its own online portal, and its own administrative processes. There is no single national form and no central application system.

This means the first step is finding your specific council's form. Search your council's website for "severe mental impairment council tax" or "SMI discount." Most councils publish the form as a downloadable PDF, an online webform, or both. Some councils (particularly larger unitary authorities and London boroughs) offer fully digital applications through their council tax online accounts.

If you cannot find the form on the council's website, call the revenues department and ask for the SMI application form to be posted or emailed. They are required to have one.

What the Form Typically Asks For

Despite the lack of standardisation, most councils' SMI forms follow a common structure. Expect to provide:

Applicant details. The name, date of birth, and National Insurance number of the person with the impairment. If someone else is completing the form on their behalf, you will need to provide your own details and explain your authority to act (Lasting Power of Attorney, DWP Appointeeship, or written consent).

Council tax account reference. This appears on the council tax bill (demand notice). Including it prevents the form from being delayed while the revenues team matches it to the right account.

Property address. The address where the person lives and for which the discount is being claimed.

Household composition. A list of all adults (18 and over) living at the property. The council uses this to determine whether the result is a Class U exemption (100%), a 25% or 50% discount, or no discount — depending on the household and how many countable adults remain after disregards.

The doctor's certificate. Most forms include a section for the GP or consultant to complete, certifying that the person has a severe impairment of intelligence and social functioning that appears to be permanent, along with the date the impairment commenced. Some councils provide a separate doctor's certificate form that must be taken to the GP surgery.

Qualifying benefit evidence. The form will ask which qualifying benefit the person receives and typically requires a copy of the DWP award letter showing the benefit name, rate, and start date.

Getting the Doctor's Certificate

This is the step that causes the most friction. The GP or consultant must certify the impairment on the council's form — or on a separate medical certificate — and record the date the impairment began.

The certificate must be provided free of charge. Under Regulation 22 and Schedule 9 of the NHS (General Medical Services Contracts) Regulations 2015, completing a statutory SMI certificate for council tax is a mandatory, non-chargeable NHS service. If the GP surgery quotes a fee of £30, £50, or £85, cite this regulation. The BMA's own guidance confirms the same position.

Some GP surgeries will complete the form the same day. Others may take two to four weeks. If the practice is unfamiliar with SMI certificates, printing the relevant page of the council's guidance — which most councils publish alongside the form — can help the practice understand what is being asked. The question the doctor must answer is narrow: does the person have a severe impairment of intelligence and social functioning that appears to be permanent?

A consultant psychiatrist, neurologist, or geriatrician can also complete the certificate. This can be useful if the GP is reluctant — a letter from the treating consultant confirming the permanence of the impairment often carries additional weight.

Submitting the Form

Depending on the council, you can submit:

• Online through the council's website portal, uploading scanned copies of the medical certificate and benefit letter
• By email (as PDF attachments) to the council tax or revenues email address
• By post to the council's revenues department
• In person at the council's customer service centre

Whichever method you choose, keep a copy of everything you send with the date of submission. If posting, use recorded delivery. If emailing, save the sent email. If submitting online, screenshot the confirmation. The submission date helps track the claim and any statutory appeal deadline; the backdated relief date depends on when the qualifying conditions were met.

What Happens After Submission

The council reviews the medical certificate and benefit evidence. Processing times vary — some councils turn claims around in two weeks, others take two months. There is no statutory processing deadline, but The Council Tax (Administration and Enforcement) Regulations 1992 require authorities to issue revised bills promptly once entitlement is determined.

During processing, continue paying the existing council tax bill. If the claim is approved, the council will recalculate the account and credit or refund any overpayment. If you stop paying while the claim is pending and it is later refused, you will owe the full amount plus potential late payment charges.

If you have not heard from the council after 21 days, follow up in writing — email or letter — referencing your submission date and asking for a status update.

If the claim is refused, the council must issue a written decision. You can then lodge a formal written grievance under Section 16 of the Local Government Finance Act 1992, which starts a statutory appeal clock. If the grievance is rejected or ignored for two months, you can appeal to the Valuation Tribunal for England, which is free.

For the complete walkthrough — including evidence checklists, backdating worksheets, GP engagement scripts, and appeal templates — our SMI Council Tax Exemption Guide covers every step from finding the form to securing the refund.

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