Wales: the 182-day letting rule for self-catering properties

Status: IN FORCE — thresholds since 1 April 2023; refinements since 1 April 2026 Last checked: 28 July 2026 Primary source: The Non-Domestic Rating (Amendment of Definition of Domestic Property) (Wales) Order 2026, WSI 2026 No. 7 — made 19 January 2026, in force 1 April 2026

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What the rule is

In Wales, a self-catering property is classed as non-domestic (and so pays business rates rather than council tax) only if it clears two separate tests in the relevant 12-month period. Business Wales states the property must be:

"available for letting commercially as self-catering accommodation for short periods totalling 252 days or more in the following 12-month period"

and actually

"commercially let for … a total of at least 182 days during that period"

Both thresholds took effect on 1 April 2023. Before that date the tests were 140 days available and 70 days let.

Miss either test and the property is domestic property, liable for council tax. That is the whole of the financial exposure: Welsh Government guidance confirms that "From 1 April 2023, the maximum level at which local authorities can set council tax premiums will increase to 300%" on second homes and long-term empty dwellings, and that where a council has determined to apply a second-homes premium "the owner will also be liable to pay the additional charge unless their property falls within an exception" (GOV.WALES, Council Tax on empty and second homes, last updated 9 March 2023). Whether a premium applies, and at what percentage, is a decision for each of the 22 Welsh councils — check your own authority.

What changed on 1 April 2026

Two refinements are now law. They were confirmed in a written statement of 21 January 2026 by Mark Drakeford MS, Cabinet Secretary for Finance and Welsh Language, which said the government intended "the proposed refinements to the application of the letting criteria to take effect from 1 April 2026". They were delivered by WSI 2026 No. 7, made 19 January 2026 and laid before the Senedd on 21 January 2026 (Senedd scrutiny reference SL(6)731), coming into force 1 April 2026.

1. Averaging over two or three years

Article 3(3) of the Order inserts a new section 66(2BBA) into the Local Government Finance Act 1988. Business Wales describes its effect as:

"an average of the days for which a property has actually been commercially let over the past two of three years may be taken as evidence of compliance, where 182 days has not been achieved in the most recent 12 months"

The Order itself permits the 182-day test to be satisfied by an average taken over either the two years or the three years immediately preceding the relevant date, where the single preceding year fell short. Article 2 of the Order limits this: the new provision "appl[ies] in relation to an assessment day that falls on or after 1 April 2026".

Read the Order, not the summaries: the statutory wording is what a valuation officer applies, and the plain-English phrasing "two of three years" circulating in trade coverage is not the operative test.

2. Charitable short breaks — up to 14 days

Article 3(3) also inserts a new section 66(2BBB), quoted in full:

"The number of days for which a building or self-contained part of a building is let or is intended to be available for letting includes, for the purpose of subsection (2BB), up to 14 days where the building, or part of the building, is let or intended to be available for letting—(a) under an arrangement with a charity registered in accordance with section 30 of the Charities Act 2011, and (b) for use free of charge by the charity's beneficiaries as self-catering accommodation for short periods."

Two conditions bind. The charity must be registered under section 30 of the Charities Act 2011, and the stay must be free of charge to the charity's beneficiaries. An informal donation to a local cause that is not a registered charity does not qualify on the face of the Order.

Announced but not yet law: the stepped transition

The same 21 January 2026 written statement and the consultation summary of responses set out a third proposal — a stepped transition into council tax, giving a property that drops out of non-domestic rating a period at the standard council tax rate before premiums bite. The summary of responses states: "It would be intended for the stepped transition to begin from 1 April 2027."

Label this as intention, not law. As at 28 July 2026 we have not verified that the legislation implementing the stepped transition has been made. Welsh Government said only that it "will bring forward the legislation required to implement the proposals". Do not plan around a 2027 grace period until the statutory instrument appears on legislation.gov.uk.

What this rule is not

It is not the Furnished Holiday Lettings regime (abolished from 6 April 2025 for income tax and CGT — a UK-wide tax matter, unconnected to Welsh local taxation). It is not the Welsh visitor accommodation register or the visitor levy, which are separate obligations under a different Act — see our Wales register and levy page. Clearing 182 days has no bearing on whether you must register with the Welsh Revenue Authority, and registering has no bearing on your rating status.

What to do now

• Count available nights and let nights separately, per property, per 12-month assessment period. They are different numbers and the 252/182 tests are independent.
• Keep the underlying booking evidence, not just a total. The Valuation Office Agency can request it.
• If you were short in the last 12 months, work out your two-year and three-year averages before assuming you have fallen into council tax.
• If you donate short breaks, get the arrangement documented with a registered charity and log the dates — up to 14 days a year now count.

Software that helps

Directory categories relevant to this rule:

• Property management systems and compliance & licensing tools — for per-property night counting that separates available nights from actually let nights. This split is the reporting problem the 182/252 test creates and very few products advertise it; check the night_counting field on each listing.
• Accounting, tax & Making Tax Digital — for retaining multi-year letting records in the form needed to evidence a two- or three-year average.

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This page is a general guide based on published government sources, last checked 28 July 2026. It is not legal, tax or valuation advice. Rating classification decisions are made by the Valuation Office Agency and council tax premiums are set by individual Welsh councils; check your own position with them or with a qualified adviser.