Landlord | Cardiff
Cardiff Landlords: Rent Smart Wales, LTT and What Wales Changes on Your Tax Return
Letting in Cardiff means answering to two systems at once: Welsh rules for licensing and property purchase, UK rules for the tax return itself. Landlords who moved in from England are often surprised by the Welsh layer; locals are often surprised how much of it is deductible.
The Welsh layer
- Rent Smart Wales. Registration is compulsory, and self-managing landlords need a licence with training. Registration, licence and training costs are deductible expenses of the letting business.
- Land Transaction Tax. Welsh purchases pay LTT with a higher-rates surcharge on additional dwellings, not English stamp duty. It forms part of your capital cost for the eventual sale.
- Renting Homes (Wales) Act. Occupation contracts, longer notice rules and compliance paperwork: the admin costs and any agent charges for compliance are deductible.
- Council tax premiums on second homes and long-empty properties in some areas, deductible where you bear them during lets or voids.
The UK layer (unchanged in Wales)
Income tax bands for Welsh taxpayers currently track England's, and the return mechanics are identical: Section 24's interest credit, replacement of domestic items relief, the property allowance, 60-day CGT reporting on sales and MTD's rollout all apply as standard. See the full landlord return guide.
Cathays student let, properly claimed
A Cardiff landlord with two student lets near the university was declaring rent minus mortgage interest only, and taking the interest as a full deduction (pre-2017 style) rather than the 20 per cent credit. Correcting the Section 24 treatment while adding Rent Smart costs, replacements, safety certificates and mileage came out slightly in her favour, and removed an error HMRC penalises when it finds it first.
Local service: landlord accountant in Cardiff.
Frequently Asked Questions
Is my Rent Smart Wales training course deductible?
Yes, licensing-related training for the letting activity is a deductible cost.
I use an agent so I'm not licensed myself. What then?
The agent must be licensed and your registration still applies. Agent fees, including their compliance charges, are deductible.
Does the higher-rates LTT surcharge reduce my income tax?
No, purchase taxes are capital, not revenue: they reduce the capital gain when you sell rather than rental profits now.
My Barry holiday let: is that taxed differently now?
The furnished holiday let regime ended in April 2025; holiday-let income is now taxed like other property income. Wales' 182-day occupancy rules affect council tax versus business rates status, which changes which local charge you pay and deduct.
What about the council tax premium on my empty property?
Where you genuinely bear it as a cost of the letting business (voids between tenancies), it is deductible. Long personal use changes the analysis.
Occupation contracts cost me solicitor fees. Deductible?
Routine tenancy/contract legal costs are revenue and deductible; legal costs of buying or selling the property are capital.
Do Welsh income tax rates differ?
Wales has the power but currently mirrors England's rates, so the arithmetic matches an English return today.
Can you handle the Welsh layer from London?
Yes. The Welsh rules are part of our standard landlord work; everything is done online as your agent.
Letting in Cardiff or the Vale?
Free 15-minute call: Welsh-compliance cost sweep, Section 24 check, and a clean return.
Or email info@yourtaxhelp.co.uk | Landlord accountant in Cardiff
General guidance only. Not personal tax advice. Contact us for advice specific to your situation. Figures relate to the 2025/26 tax year unless otherwise stated.