Business rates or council tax? The 252/182-day rule for holiday lets in Cardiff

In Wales, a self-catering holiday let pays business rates instead of council tax only if it was available to let for at least 252 nights and actually let for at least 182 nights in a 12-month period. If it falls short, it pays council tax. In Cardiff, a furnished home that's nobody's main residence is charged double council tax.

What is the 252/182-day rule?

GOV.UK says you can claim business rates for a self-catering holiday let in Wales only if all of these apply:

• it was available to let commercially, to make a profit, for at least 252 nights within a 12-month period
• it was actually let commercially for at least 182 nights within the same 12 months
• you intend to make it available for at least 252 nights in the next 12 months

That's a much higher bar than England, where the test is 140 nights available and 70 let. Wales raised its thresholds from those same figures on 1 April 2023. In plain terms, your let needs to be booked for about half the year and open for bookings for about 69% of it.

Which nights count?

You can count nights the property was available, or actually let, for stays of 28 nights or less. You can't count:

• nights you used it yourself, including letting it to friends or family at a discounted rate
• nights it was closed for repair or refurbishment
• future bookings that haven't happened yet

Stays of more than 28 nights don't count towards the 182 nights let. They can count towards the 252 nights available, but only if the property could have been booked for 28 nights or less.

What changed in April 2026?

Two things make the test easier to pass.

Averaging. If your let fell short of 182 nights in the last 12 months, you can use the average over the previous 24 or 36 months. For example, 160 nights one year and 210 the next averages 185, which clears the bar. If you own several holiday lets in the same location or very near each other, you can also average across them.

Charity nights. You can count up to 14 nights a year when you donated the use of the property to a registered charity.

How do you apply?

Fill in HMRC's form, one per property. Email it to selfcatering@voa.gov.uk with the subject heading "Self-catering application — Wales", or post it to the Valuation Officer in Durham. If you're averaging, say so in the form's "further information or remarks" section.

Business rates don't always mean a big bill. Small business rate relief in Wales gives 100% relief to eligible properties with a rateable value up to £6,000, tapering to zero at £12,000, for up to two properties per business in each council area. Ask Cardiff Council what applies to you.

What if it doesn't qualify? Cardiff's council tax premium

Then the property pays council tax, and it can be moved from business rates to council tax if it stops meeting the test.

Cardiff Council charges a 100% premium on second homes and furnished properties that are no-one's residence. That means 200% of the standard council tax. Here's what that looks like on Cardiff's average Band D charge for 2026 to 2027:

Your exact bill depends on your band and the part of Cardiff you're in.

A few properties are excluded from the premium, such as an annexe that's part of your main home or a seasonal home you can't live in all year round. Ask Cardiff Council if you think one applies.

Is there a grace period?

From 1 April 2027, yes. New Welsh regulations say that when a holiday let moves from business rates to council tax because it no longer meets the letting test, the council can't charge a premium for 12 months. You pay the standard rate for that year, which gives you time to get your occupancy back up or plan what to do next.

What should Cardiff hosts check now?

1. Count the nights your property was genuinely available and actually let in the last 12 months.
2. Take out personal use, discounted friends-and-family stays, repair closures and stays of over 28 nights.
3. If you're under 182 nights let, check whether averaging over 24 or 36 months gets you there.
4. If you pass, apply to the Valuation Office and ask Cardiff Council about small business rate relief.
5. If you don't, expect council tax with the 100% premium, subject to the 12-month grace period from April 2027.

Separately, every short-let host in Wales must register with the Welsh Revenue Authority by 31 March 2027. Our guide to the Wales visitor accommodation register explains how.

Want help with a Cardiff short let?

Occupaid offers short-let management in Cardiff, Bath and Bristol, with no long-term lock-in. See our Cardiff Airbnb management page, or book a 30-minute call.