Property Capital Gains Tax
We help Cardiff landlords and property owners calculate, report and pay Capital Gains Tax on property sales within HMRC's strict 60-day deadline. With nearly ten years of experience handling property disposals across South Wales, we make sure you claim every relief you're entitled to and stay on the right side of the taxman.
What we cover under Property CGT
Whether you're selling a buy-to-let, a second home, or multiple properties, we handle every step of the Capital Gains Tax process so you don't miss a deadline or overpay.
CGT Calculation & Reporting
Work out your taxable gain, deduct allowable costs and improvements, and submit your return to HMRC within 60 days of completion.
Relief Claims & Planning
Identify and claim Private Residence Relief, Letting Relief, and other exemptions to reduce your bill legally.
Self Assessment Integration
Include your property disposal in your annual tax return and coordinate payments so nothing falls through the cracks.
Multiple Property Disposals
Manage CGT reporting across several sales in a tax year, keeping track of allowances and payment schedules.
Selling a property? Here's what HMRC expects
When you sell a rental property, a buy-to-let, or a second home, you have 60 days from completion to report the sale and pay any Capital Gains Tax due. Miss that window and you face penalties, even if no tax is owed. We step in as soon as contracts exchange, calculate your gain by deducting your original purchase price, legal fees, stamp duty and any capital improvements, then file your return and arrange payment before the clock runs out.
The rates for residential property CGT are 18% if your total income keeps you in the basic rate band, and 24% if you're a higher or additional rate taxpayer. You also get a £3,000 annual exemption to deduct from your gain. It sounds straightforward, but the devil is in the detail: joint ownership, partial lettings, periods of absence, and improvement versus repair costs all affect the final number.
We make sure you claim every relief you're entitled to and don't pay HMRC a penny more than the law requires.
More information
How we work out your Capital Gains Tax
We start with your sale proceeds, subtract the original purchase price, then deduct allowable costs: solicitors' fees, estate agent commission, stamp duty you paid when you bought, and the cost of genuine improvements like an extension or new kitchen. Routine repairs and maintenance don't count, so we separate those out. If you lived in the property at any point, or let out a room while it was your main home, we explore Private Residence Relief and Letting Relief to bring the bill down.
Once we've calculated the gain and applied your £3,000 exemption, we register you with HMRC's online CGT service if you're not already set up, submit the return, and tell you exactly what to pay and when. After the 60-day window closes, we include the disposal in your Self Assessment tax return later in the year, reconcile any payments already made, and keep your records straight for future reference.
Why Cardiff landlords come to us
Across Cardiff, Penarth, Barry, and the Vale, we work with buy-to-let landlords who are selling up after years of tenancies, second-home owners downsizing their portfolio, and families disposing of inherited property. Local property prices have climbed steadily, which means more sales trigger CGT, and HMRC's enforcement of the 60-day rule has tightened. You need someone who knows the reliefs inside out and won't let a deadline slip.
We've been doing this for nearly ten years. We know the questions HMRC ask, the evidence they want, and the mistakes that cost people money. Whether you're selling one flat in Pontcanna or three terraces in Roath, we give you a fixed quote upfront, work to your completion date, and make sure the whole process feels manageable. When the sale goes through, you'll know your tax position is watertight and you can move on without worry.
You might also need
Property Portfolio Accounting
Rental income and expense accounting across multiple properties, with clean records, profitability by property, and HMRC-ready figures for returns and planning.
Property Portfolio Accounting→Buy-to-Let Tax Returns
Buy-to-let tax returns prepared and filed with clear guidance on rental income, allowable expenses and HMRC deadlines, so you stay compliant and pay the right tax.
Buy-to-Let Tax Returns→Landlord Accounting Services
Landlord accounting for rental income, allowable expenses and HMRC deadlines. Clear figures for Self Assessment, plus support for property sales and tax planning.
Landlord Accounting Services→Before you get started
These are the questions Cardiff property owners ask us most often about Capital Gains Tax.
Do I need to pay CGT if I'm selling my main home?
What's the 60-day deadline everyone talks about?
How much will I pay in Capital Gains Tax?
What costs can I deduct to reduce my tax bill?
Can I claim any relief to bring the bill down?
What if I'm selling more than one property this year?
Do I still need to include the sale in my tax return?
How much do you charge for CGT reporting?
Let's talk about your property sale
Book a free consultation and we'll walk you through the CGT process, calculate your likely bill, and make sure you meet HMRC's deadline.
Book a free consultation