Long let or short let in Swansea? The honest maths
Three Welsh rules and one number decide it, and most people giving confident answers sell only one of the two options. We manage both, so here is the working.
Every few weeks someone with a two-bed near the Marina or a cottage on Gower asks: would it make more as a short let? Honestly, it depends. Figures below are illustrative, drawn from public datasets that disagree with each other, and should be replaced with your property's own before you decide anything.
Start with the legal question, not the income question
Use class. Since October 2022 Wales has had three residential use classes: C3 (primary home), C5 (second home) and C6 (short-term let). A property can move between them without planning permission unless the council has made an Article 4 direction, as Gwynedd and Eryri have. We have found none covering short lets in Swansea verify with Swansea Council planning, but a flat's lease or a mortgage may still prohibit nightly letting, and that check comes first.
The 182-day test. Since April 2023 a self-catering property in Wales is only assessed for business rates, rather than council tax, if it is available to let for at least 252 days a year and actually let for at least 182. Fall short and it is council tax, and because a furnished home that is nobody's main residence counts as a second home, Swansea Council adds a 100% premium verify current rate; Welsh law allows up to 300%. The Welsh Government has consulted on multi-year averaging and counting up to 14 charity stays verify legislative status; until that is law, plan on 182.
The register, and possibly a levy. The Wales visitor accommodation register opened on 1 October 2026. Anyone taking paid overnight bookings, including one flat on Airbnb, must register with the Welsh Revenue Authority; existing providers have until 31 March 2027, and new ones must register before their first guest. Councils may add a visitor levy from April 2027 at the earliest (£1.30 per person per night for most accommodation). Swansea Council's last published position was no plans to introduce one verify current position.
If your property clears those three, you can look at the money.
A worked example: a two-bed near the Marina
Illustrative. Mortgage, insurance, ground rent and service charge are left out; they apply to both.
As a long let. ONS puts Swansea's average private rent at £838 a month in May 2026, up 5.5% on the year; a modern SA1 two-bed sits above that, call it £950 verify against current lets. Management at 12% capped at £150 is £114 a month. Allow two weeks' void and £500 maintenance.
As a short let. The two public datasets for Swansea disagree sharply: one reports an average daily rate of £141 and 36% occupancy across roughly 1,180 listings for the 12 months to August 2026; another, a year older, reports £127 and 66% verify both methodologies. The gap is different samples and methods, not a year's change, so we run both.
| Long let | Short let, 36% occupancy | Short let, 60% occupancy | |
|---|---|---|---|
| Gross income | £11,400 (£950 × 12) | £18,500 (131 nights × £141) | £30,900 (219 nights × £141) |
| Platform fees (about 15%) | – | −£2,800 | −£4,600 |
| Net booking revenue | – | £15,700 | £26,300 |
| Voids / maintenance | −£440 / −£500 | – / −£1,000 | – / −£1,500 |
| Utilities, broadband, TV licence | – (contract-holder pays) | −£1,800 | −£2,200 |
| Council tax or rates | – (contract-holder pays) | −£3,600 council tax incl. premium verify band | £0 to £600 business rates verify relief |
| Management | −£1,370 (12%, capped) | −£2,800 (18% of net booking revenue) | −£4,700 (18%) |
| Cleaning | – | at cost, charged to guests | at cost, charged to guests |
| Net to owner, before mortgage | about £9,100 | about £6,500 | about £17,700 |
At the lower occupancy, the long let wins by around £2,600 a year, before the owner's time. At the higher, the short let wins by around £8,600, and that margin must pay for furnishing and set-up (£5,000 to £8,000 for a two-bed verify, plus our SA Launch fee of £495, waived on a 12-month agreement) and for your tolerance of January.
What the short-let figure hides
Occupancy is not a property feature; it is a result of pricing, photography, response times, reviews and the calendar. The same flat run by an owner who sets one price in March and leaves it, and by a team that re-prices nightly around Arena dates and university weekends, will not land on the same number.
Cleaning is passed through to guests, but turnovers are not free: linen, restocking, an inspection between every stay, and the cleaner who does not show at 10am on a Saturday. Utilities move from the contract-holder's name to yours; so does council tax if you miss 182 nights. Reviews compound in both directions.
The 182 nights are not a target you set; they are an outcome you track, because the council will ask.
When a short let wins in Swansea
Flats in SA1 and the Marina with parking, where Arena events, university visits, hospital contractors and Monday-to-Thursday work stays flatten the year; and well-presented Mumbles and Gower properties with a view, where summer rates carry a quiet winter. In both, the owner is realistic about seasonality and the property is furnished for guests, not for the owner's own weekends.
When a long let wins
A terrace in Morriston or Sketty with no parking and an owner who wants the income to arrive on the first of the month. A leasehold flat whose lease forbids short lets. A cottage the owner uses themselves for a month each summer, which quietly eats the 182-day test. Any property where the honest occupancy number is in the thirties.
The honest answer: keep the right to change your mind
We can write either answer because we run both. A property we manage can move from long let to short let and back, or to a shared house with hellomyroom, without re-onboarding; we call it Flex Switch and it is included. An SA1 flat can be a short let from Easter to September and a six-month let to a contractor over winter. A cottage that misses 182 nights one year can become a long let the next, before the premium lands.
If you own in Swansea and want this table with your own numbers, ask for the free short-let appraisal: one page, both models, the three legal checks, and a written recommendation that says "keep the long let" when that is the answer. WhatsApp the address to 0751 355 2133, call 01792 807 051, or email lettings@hellonewhome.co.uk.
Hello New Home is a Rent Smart Wales licensed agent. Full SA Management is 18% of net booking revenue with cleaning at cost; long-let management is 12% capped at £150 a month; both carry a 30-day exit with no fee. Figures here are illustrative, not a forecast. Full fee sheet.
Sources
- Welsh Government planning use classes C3, C5 and C6 and Article 4 directions; Eryri National Park Authority Article 4 direction (1 June 2025); Cyngor Gwynedd Article 4 direction (1 September 2024)
- Welsh Government, self-catering accommodation criteria for non-domestic rates (252 / 182 days, from April 2023); consultation on self-catering thresholds and exemptions (2025)
- Swansea Council, "Council Tax premiums for empty properties and second homes"; Council Tax (Long-term Empty Dwellings and Dwellings Occupied Periodically) (Wales) Regulations 2022
- Visitor Accommodation (Register and Levy) Etc. (Wales) Act 2025 and Commencement Order; Welsh Revenue Authority, "Registering visitor accommodation: technical guidance"; Welsh Government visitor levy technical guidance
- Powys County Council, Visitor Levy Report (September 2025)
- ONS, "Housing prices in Swansea", private rents, May 2026
- BnB Calc, Swansea short-term rental market data (12 months to August 2026); Airbtics, Swansea Airbnb profitability (September 2024 to August 2025)