--- title: "Buy-to-Let Tax Returns in Cardiff | Luminaire Accounts" description: "Buy-to-let tax returns prepared and filed with clear advice on allowable expenses, mortgage interest and HMRC deadlines. For landlords in Cardiff." canonical: "https://hlsaccounting.co.uk/services/buy-to-let-tax-returns" --- Property & Landlord Accounting # Buy-to-Let Tax Returns We help Cardiff landlords file accurate buy-to-let tax returns, claim every allowable expense, and stay on the right side of HMRC. Whether you own one property or ten, we'll make sure you're not overpaying tax or missing deadlines. [Book a free consultation](https://calendly.com/hlsaccounting/new-client-meeting) 10 Years in practice 200+ Tax returns filed Local Cardiff-based team ![Overhead angled view of a tax professional’s hands working on rental property tax paperwork at a clean desk with calculator, laptop, receipts folder, house keys, and a small model house in the foreground.](/_next/image?url=%2Fapi%2Fmedia%2Ffile%2Ftax_professional_rental_property_paperwork_studio_photo.png%3Fv%3D1773064235269&w=1536&q=75&dpl=dpl_DEc4fGhEc1SCRZZutzoEsRuDy1CJ) ## Everything under buy-to-let tax returns From rental income reporting to capital gains when you sell, we cover all the tax obligations that come with owning property in Cardiff and South Wales. ### Rental Income Reporting Accurate Self Assessment filings that capture all rental profits and allowable deductions. ### Expense Claims & Deductions Maximising claims for mortgage interest, repairs, insurance, letting fees and more. ### Capital Gains Tax on Sales Calculating and filing CGT when you dispose of a buy-to-let property. ### Multi-Property Returns Consolidated tax planning and compliance for landlords with several properties. ## How we handle your buy-to-let tax return If you own rental property in Cardiff or across South Wales, you need to file a Self Assessment tax return reporting your rental income and expenses. We take care of the paperwork, claim every allowable deduction, and make sure HMRC gets what they need on time. You focus on managing your property. We focus on keeping your tax bill as low as the law allows. We start by gathering your records: rental income, mortgage statements, repair invoices, insurance, letting agent fees, even advertising costs. Then we calculate your taxable profit, claim reliefs like mortgage interest under the current rules, and file your return before the deadline. If you're selling a property, we'll also handle the Capital Gains Tax calculations and any main residence nominations that could save you money. > We make sure you claim every expense you're entitled to, so you're never overpaying HMRC. More information ### Common concerns we address Many landlords worry they're paying too much tax because they don't know which expenses qualify. Others have been caught out by late filing penalties or confused by the mortgage interest relief changes. We've seen it all. Our job is to keep your records straight, your claims legitimate, and your compliance bulletproof. Cardiff's rental market is strong thanks to demand from professionals, students and families, but that also means HMRC is paying close attention. Whether you own a city-centre flat or a family home in Pontypridd, we understand the local landscape and the specific tax rules that apply in Wales, including higher Land Transaction Tax rates on additional properties. ### When a limited company makes sense If you own multiple properties or your rental profits push you into a higher tax band, it might be worth holding them in a limited company instead. Corporation tax can be more favourable than income tax for larger portfolios. We'll talk you through the numbers and help you decide what structure works best for your situation, now and as you grow. Once your return is filed, we stay in touch. Tax rules change, allowances shift, and your portfolio might expand. We're here year-round to answer questions, plan ahead, and make sure you're always a step ahead of the next deadline. ### Ready to talk? Book a free consultation and we'll walk you through exactly how we can help with your buy-to-let tax return. [Book a free consultation](https://calendly.com/hlsaccounting/new-client-meeting) ### You might also like - [Limited Company Buy-to-Let Setup Advice](/services/limited-company-buy-to-let-setup-advice)→ - [Stamp Duty Land Tax (SDLT) Advice](/services/stamp-duty-land-tax-sdlt-advice)→ - [Property Capital Gains Tax](/services/property-capital-gains-tax)→ ## Worth considering Property & Landlord Accounting ### Furnished Holiday Let (FHL) Tax Returns We prepare and file Furnished Holiday Let tax returns, checking qualifying days, allowable expenses and allowances, so your HMRC figures are correct and on time. [Furnished Holiday Let (FHL) Tax Returns→](/services/furnished-holiday-let-fhl-tax-returns) Property & Landlord Accounting ### 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→](/services/property-portfolio-accounting) Property & Landlord Accounting ### 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→](/services/landlord-accounting-services) ## Before you book These answers are specific to landlords filing buy-to-let tax returns with us in Cardiff and South Wales. What expenses can I claim on my buy-to-let tax return? You can claim mortgage interest (under the current relief rules), property repairs and maintenance, insurance, letting agent fees, advertising, legal and accountancy fees, and certain travel costs. We'll review your records and make sure you're claiming everything you're entitled to. When does my Self Assessment tax return need to be filed? The deadline is 31 January following the end of the tax year (5 April). So for the 2023/24 tax year, your return is due by 31 January 2025. We aim to file well ahead of that to avoid any last-minute stress. Do I need to file a return if I only own one rental property? Yes. If you receive rental income, HMRC requires you to register for Self Assessment and file a tax return, even if it's just one property. We'll handle the whole process for you. How much tax will I pay on my rental income? It depends on your total income and tax band. Rental profit is added to your other income and taxed at your marginal rate (20%, 40% or 45%). We'll calculate your liability and look for ways to reduce it through allowable deductions and reliefs. What happens if I sell a buy-to-let property? You may owe Capital Gains Tax on any profit from the sale. We'll calculate the gain, apply any allowances or reliefs, and file the necessary CGT return with HMRC within 60 days of completion. Can you help if I own multiple properties? Absolutely. We work with landlords who own one property and those with ten or more. We'll consolidate all your rental income and expenses into a single tax return and help you plan for the most tax-efficient structure. Do I need to keep receipts for everything? Yes. HMRC can ask to see evidence for any expense you claim, so keep invoices, bank statements and receipts for at least five years. We'll guide you on what records to keep and how to organise them. What if I've fallen behind on previous tax returns? We can help you get up to date. HMRC charges penalties for late filing, but the sooner you act, the lower those penalties will be. We'll prepare any outstanding returns and deal with HMRC on your behalf. ## Let's talk about your buy-to-let tax return Book a free consultation and we'll explain exactly how we can save you time, reduce your tax bill, and keep you compliant. [Book a free consultation](https://calendly.com/hlsaccounting/new-client-meeting)