By the Unity Stays directors, Marcus Chong & Gadir Al-Khatib · Last updated 12 August 2026
In short: A Welsh short let must be available to let for 252 days and actually let for 182 in the previous year to be rated as self-catering rather than charged council tax — more than double England's 70-day letting test. Miss the 182 and the property moves to council tax, where Welsh councils can apply very large second-home premiums.
The thresholds that decide your bill
To be rated as self-catering accommodation in Wales rather than charged council tax, a property must have been available to let for at least 252 days and actually let for at least 182 days in the previous year.
Compare that to England, where the figures are 140 available and 70 actually let. The Welsh letting threshold is more than double.
The 182-day figure is the one that catches people. It is a letting target, not an availability one — a property advertised all year but booked for 150 nights fails it.
Why failing it costs so much more in Wales
Falling short does not simply mean a slightly different bill. It means the property moves to the council tax list, and Welsh councils hold premium powers that go considerably further than in England.
Some authorities apply very large uplifts on second homes and under-used property — substantially above the standard charge. The swing between a rated property with small business rate relief and a council-taxed property with a premium can be enough to change whether a property works at all.
This makes the 182 days a planning number that has to be watched during the year, not a figure to check in April. A property tracking towards 170 nights in October is worth pushing deliberately.
Licensing and registration
Wales has legislated for a statutory licensing scheme for visitor accommodation and the position continues to move. It sits alongside the rating and premium rules rather than replacing them.
As with the rest of the UK, planning is separate again. There is no national night cap equivalent to London's 90 nights, but a material change of use can require permission and local authorities apply their own approaches.
The practical position: check the council for the specific address on all three — rating, premium and any registration or licensing requirement — because they are decided in different places.
What this means for a Welsh property
It raises the bar. A Welsh short let has to achieve genuine occupancy to stay on the rating list, which means the quiet months matter more than they do across the border.
That pushes the model towards year-round demand rather than a summer season — which in practice means longer stays, contractor and relocation demand, and the mid-week bookings that fill November. It is one of the reasons our business stays side exists.
It also means the record-keeping matters. Nights actually let, by property, by year, is the evidence the threshold requires, and reconstructing it afterwards is painful. Our monthly statements carry it.
A plain summary of a changing area, not tax or legal advice. Premiums are set locally and thresholds change. Confirm with your council and the Valuation Office Agency.