Second Home Council Tax Wales: Premiums, Exceptions and What You Actually Pay

A second demand notice lands on your doormat — and the number is double what you expected. If you own a property in Wales that nobody uses as their main home, that scenario is now routine. Welsh councils can charge premiums of up to 300% on top of the standard council tax bill, and most of them do charge something.

How the Premium Works

Under Sections 12A and 12B of the Local Government Finance Act 1992 (as amended by the Housing (Wales) Act 2014), each of the 22 Welsh billing authorities has discretionary power to add a council tax premium to two categories of property:

• Second homes (periodically occupied): substantially furnished but not anyone's sole or main residence. The premium can apply from day one.
• Long-term empty dwellings: unoccupied and substantially unfurnished for at least 12 continuous months. The first six months are usually covered by a Class C exemption (zero council tax), then standard rate kicks in from months 6–12, and the premium attaches after month 12.

The maximum premium rose from 100% to 300% on 1 April 2023 under the Council Tax (Long-term Empty Dwellings and Dwellings Occupied Periodically) (Wales) Regulations 2022. A 300% premium means you pay 400% of your normal band charge (100% base + 300% premium).

What Councils Actually Charge

Premium rates vary widely. Gwynedd charges 150% on both second homes and empty properties. Pembrokeshire charges 125% on second homes and up to 300% on long-term empty homes depending on vacancy duration. Anglesey sits at 100% across the board. Denbighshire charges 150% on second homes and on empty homes vacant for less than five years; the empty-home premium is 225% for properties vacant five years or longer in 2026/27, rising to 250% from April 2027 and by 25 percentage points annually up to 300%.

A Band D property in Gwynedd with a £2,006 base bill and a 150% second home premium generates an annual charge of roughly £5,015. In Pembrokeshire at 125% over a £1,728 base, the bill reaches about £3,888.

The Seven Statutory Exception Classes

Not every second home or empty property has to pay the premium. The Council Tax (Exceptions to Higher Amounts) (Wales) Regulations 2015 define seven national exception classes, and your council cannot charge a premium on any property that falls within one:

• Class 1: Property actively marketed for sale at a reasonable price (up to 12 months)
• Class 2: Property actively marketed for let at a reasonable rent (up to 12 months)
• Class 3: Annexe forming part of a main dwelling
• Class 4: Owner lives in armed forces accommodation
• Class 5: Caravan pitches and boat moorings (second homes only)
• Class 6: Planning conditions restrict year-round occupation (second homes only)
• Class 7: Job-related dwelling — the liable person is required by an employer to live in a job-related dwelling elsewhere, or the second home itself is provided by an employer for work (second homes only)

Classes 1–4 cover both empty homes and second homes. Classes 5–7 cover second homes only. A transitional Class 8 arrives in April 2027 for properties moving from business rates back to council tax.

When to Act

If you want to challenge a premium decision, first send a formal written Section 16 grievance to the council. If it rejects the grievance, the VTW must receive your appeal within two months of the decision notice. If the council does not respond within two months, the VTW must receive your appeal within four months from the date you submitted the grievance.

The Wales Premium Exceptions Guide walks through each exception class, the evidence you need, and the application and appeal timeline step by step — from working out which class fits your property to drafting a VTW appeal if the council says no.

For free debt advice on council tax arrears, contact StepChange (0800 138 1111) or Citizens Advice Cymru — arrears enforcement is outside the scope of premium exception claims and those organisations provide regulated help at no cost.

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