Wales introduces Class 8 one‑year council tax exception

From 1 April 2027, a new Welsh rule gives some properties a one‑year breather from higher council tax. It’s called Class 8 (Dosbarth 8) and it applies when a property that used to be treated as non‑domestic (for business rates) becomes domestic and moves onto council tax.

The change sits in the Council Tax (Exceptions to Higher Amounts) (Wales) (Amendment) Regulations 2026. The Regulations were made on 20 March 2026 and signed by Mark Drakeford, Cabinet Secretary for Finance and Welsh Language, and will come into force on 1 April 2027, according to legislation.gov.uk.

If you’re new to this, properties in Wales are either ‘domestic’ or ‘non‑domestic’. Domestic properties pay council tax. Non‑domestic properties-think shops, offices and qualifying self‑catering lets-pay non‑domestic rates, often called business rates. The legal tests for each sit in the Local Government Finance Act 1988 and related Welsh rules.

Some councils in Wales charge a higher amount of council tax-also called a premium-on long‑term empty homes and on second homes. Premiums are set locally and vary by area. Class 8 does not remove standard council tax; it simply stops the premium from being added for a limited time when a property switches from business rates to council tax.

Who exactly is covered? Class 8 applies to dwellings that were previously classed as non‑domestic because they met the specific self‑catering test in section 66(2BB) of the 1988 Act, and that later stop meeting that test. In plain terms, this is most relevant to holiday lets and similar short‑term accommodation that no longer qualify for business rates.

The timer matters. The exception lasts for one year starting on the exact date the property ceases to be non‑domestic under section 66(2BB). It does not wait for the next 1 April. Keep a clear note of the effective date you receive from the Valuation Office Agency or your council, because that is what starts and ends your Class 8 window.

Here’s a worked example. Your self‑catering cottage in Ceredigion stops qualifying for business rates on 15 June 2027 and is re‑listed for council tax. If your council normally charges a second‑home premium, you would pay the standard council tax from 15 June 2027 up to and including 14 June 2028. From 15 June 2028, the premium could apply if the property still counts as a second home.

Another scenario. You switch the same cottage to your main residence in September 2027. Main homes are not subject to second‑home premiums, so you would simply pay standard council tax as normal. Class 8 is still there in the background for that first year, but it makes no practical difference if the dwelling is your only or main home.

Do you need to apply? In law, the exception is defined by the dwelling’s status, not by who owns it. Your council, as the billing authority, should apply it automatically once the lists are updated. In practice, tell them as soon as you get notice of the reclassification and share any paperwork showing the effective date to keep your bill correct.

What if the property flips back? If you later meet the self‑catering test again and return to business rates, council tax stops and the Class 8 question falls away. If you sell during the year, the exception is attached to the dwelling, so the remaining part of the one‑year period should carry on for the new owner; check the dates with the council.

A quick glossary in simple terms can help. Domestic property means homes that pay council tax. Non‑domestic property means properties on the rating list that pay business rates. Section 66(2BB) is the legal rule that lets certain self‑catering properties be treated as non‑domestic. A higher amount or premium is the extra percentage some councils add to bills for second homes or long‑term empties. A billing authority is your local council that issues council tax bills.

The Welsh Government says a Regulatory Impact Assessment is available for this change, and the full text of the Regulations is published on legislation.gov.uk. For now, the takeaway is simple: if a former holiday let moves onto council tax on or after 1 April 2027, there is a one‑year buffer against any local premium-use that time to plan your costs and confirm your status.