Buy-to-Let Tax Guide 2026: What Every Landlord Needs to Know
As a landlord in Wales, you’re obligated to pay taxes when buying, letting and eventually selling a property. Whether you’re a first-time landlord or have a large portfolio of properties, these tax rules can become complicated, especially if you own properties outside of Wales where different tax rules apply.
In this blog, our experts will walk you through the various taxes landlords need to pay, and how to become tax efficient, so you can continue to run a successful business.
Buy-to-Let Tax in Wales: What Landlords Need to Know
When considering a buy-to-let property, it’s important to understand the tax landscape to help make the process less daunting. Here are four key aspects to look into before buying:
- Land Transaction Tax – When purchasing the property
- Income Tax – On taxable rental profits
- Capital Gains Tax – Potentially when selling
- Other Considerations – Finance costs, company ownership and reporting requirements.
Aside from Land Transaction Tax (LTT), these all apply UK-wide, not just in Wales; in England and Northern Ireland, LTT is known as Stamp Duty Land Tax (SDLT). Let’s start by exploring what LTT is.
Land Transaction Tax on Buy-to-Let Properties in Wales
You must pay LTT if you buy a residential property or non-residential land or property valued over a specific threshold in Wales. Currently, that threshold is £225,000 for main residences, but this varies depending on how many properties you own.
As a landlord, this can make buy-to-let property tax complicated, but the Welsh Government has a useful LTT tax calculator to help you get a better understanding of the potential tax you’ll need to pay.
It’s essential that before buying a property, you check the latest LTT tax rates and bands to ensure you’re not surprised with a higher-than-expected price. The current rates for residential tax are:
| Price threshold | LTT rate |
| The portion up to and including £225,000 | 0% |
| The portion over £225,000 up to and including £400,000 | 6% |
| The portion over £400,000 up to and including £750,000 | 7.5% |
| The portion over £750,000 up to and including £1,500,000 | 10% |
| The portion over £1,500,000 | 12% |
And the rates for higher residential tax (owning one or more properties) are:
| Price threshold | LTT rate |
| The portion up to and including £180,000 | 5% |
| The portion over £180,000 up to and including £250,000 | 8.5% |
| The portion over £250,000 up to and including £400,000 | 10% |
| The portion over £400,000 up to and including £750,000 | 12.5% |
| The portion over £750,000 up to and including £1,500,000 | 15% |
| The portion over £1,500,000 | 17% |
So, how much LTT do you actually need to pay? Well, if you buy a second home for £260,000, you’ll pay:
| Rates and bands | Tax due |
| 5% on the first £180,000 | £9,000 |
| 8.5% on the next £70,000 | £5,950 |
| 10% on the final £10,000 | £1,000 |
| The total LTT will be | £15,950 |
How Does LTT Differ From Stamp Duty?
As accountants based in Cardiff, Wales, we often hear the question: ‘Is stamp duty the same as land transaction tax?’, and the short answer is no. LTT only applies to Wales, while SDLT applies to England and Northern Ireland.
It’s crucial to know the difference as the rates and rules differ, meaning if you use SDLT instead of LTT on your Welsh property, you’re using the incorrect system and could calculate the wrong tax amount. Remember:
- LTT for properties based in Wales
- SDLT for properties based in England or Northern Ireland
How Much Tax Do You Pay on Rental Income?
Once you’ve bought your property and start renting it out, you’ll then be expected to pay tax on your rental income. Landlords don’t pay income tax on their gross rent as the UK tax system considers expenses. So, how much tax you pay will vary depending on your taxable rental profit:
- Rental income – Allowable expenses = taxable rental profit
Similar to LTT, there are thresholds determining how much tax you pay. These are currently the same across Wales, England and Northern Ireland, and include:
| Tax Rate | Percentage | After Income Allowances (2026 – 2027) |
| Basic | 20% | Up to £37,7000 |
| Higher | 40% | £37,701 – £125,140 |
| Additional | 45% | Over £125,141 |
What Landlord Expenses Are Allowable?
Allowable landlord expenses include the day-to-day costs associated with ‘wholly and exclusively’ renting out a property that can be deducted from your rental income. Tax-deductible expenses for a rental property include:
- Letting agent fees
- Property management fees
- Insurance
- Repairs and maintenance
- Council Tax where applicable
- Utilities paid by the landlord
- Legal/accountancy fees where allowable
- Cleaning
- Advertising
- Service charges and ground rent where applicable.
What Expenses Aren’t Tax Deductible?
There are specific expenses that you can’t claim against, such as:
- Personal expenses e.g. clothes, private travel, private phone
- Business entertaining
- Improvements (this is different from repairs and maintenance)
- Restoration work
- Mortgage payments
The expense that causes the greatest uncertainty is improvement costs, as this is often confused with repairs and maintenance. Any major upgrades, like an extension or conservatory, or even replacing standard items with luxury ones, are considered improvements and aren’t tax-deductible.
Can You Get Tax Relief on a Buy-to-Let Mortgage?
Similarly, individual landlords can’t deduct residential mortgage interest payments from their rental income. Instead, landlords can get tax relief on their buy-to-let mortgages by claiming a tax reduction based on 20% of their qualifying interest payments and finance costs. Whether you are a basic, higher, or additional rate taxpayer, you will receive this 20% tax relief.
What If I Own My Buy-to-Let Through a Limited Company?
Some landlords decide to operate as a private individual and others through a limited company. The most tax-efficient structure for you depends on your circumstances, such as your tax bracket, mortgage and portfolio goals. Let’s take a closer look at the pros and cons of operating as a limited company and how it affects your tax:
- Ownership: This separates your business and personal responsibilities; so, if the business makes a loss, you won’t be made responsible, which, although not directly tax-related, is a prominent advantage.
- Corporation Tax: Limited companies have no capital gains allowance like a private landlord. However, if you’re paying a high-rate tax, you can claim corporation tax.
- Mortgage Interest: Unlike a private landlord, limited companies can deduct mortgage interest as a business expense, which is particularly useful if you have a large portfolio.
- Administrative Considerations: Although setting up as a limited company is fairly straightforward, the paperwork and legalities can be time-consuming without the support of a trusted accountant.
How to Reduce Capital Gains Tax on a Buy-to-Let Property
Capital gains tax applies when you sell your buy-to-let property; the amount of tax you pay applies to the property’s increased value, and the rate is based on your taxable income. Failure to pay your capital gains tax could result in a penalty fee.
The following factors could help to reduce your capital gains tax:
- If the property is your main residence, you don’t need to pay, as it’s covered by the private residence relief (PRR).
- Similarly, letting relief applies if the property is your main residence and you were living there at the same time as your tenants.
- Landlords have an annual capital gains tax allowance of £3,000, and married or civil partners can combine their allowances.
- Allowable costs, such as legal fees, estate agent fees and surveyor costs, can be deducted.
Tax Returns & Reporting Your Rental Income
You must report your rental income to HMRC, and this can be done using a Self Assessment following the end of the previous tax year and before the application deadline to avoid a penalty fee.
Self Assessments require efficient record-keeping, such as receipts and invoices, to be used as evidence for expenses. Without this information, you could be liable to pay more tax than you initially expected.
As of April 2026, Making Tax Digital (MTD) officially started for landlords and sole traders with income over £50,000; in 2027, that threshold will be £30,000, and in 2028, £20,000. This means all records will need to be digitised and sent through an HMRC-approved system. Partnering with an accountant can make this process quick and easy, as they can support you in meeting deadlines and maintaining accurate documentation.
Buy-to-Let Tax Checklist for Welsh Landlords
Before Buying:
- Check the LTT you’ll pay
- Consider personal vs company ownership
- Factor tax into your investment calculations
- Understand mortgage finance costs
While Renting:
- Record rental income
- Keep evidence of allowable expenses
- Separate repairs from improvements
- Keep mortgage/finance records
- Check your Self Assessment/MTD obligations
Before Selling:
- Calculate your potential capital gain
- Identify allowable costs
- Check available losses/allowances
- Consider capital gains tax before proceeding with the sale.
Get Buy-to-Let Tax Advice from Hayvenhursts
Whether you’re purchasing your first buy-to-let property in Wales or have an established portfolio, understanding your tax obligations can help you make more informed decisions.
At Hayvenhursts, we can support you every step of the way, from LTT and rental income to capital gains tax and allowable expenses. To learn more about our Property Tax service, get in touch with the team on 02920 777 756 or at .