Buy-to-Let Tax Rules & Reliefs Before Buying, Selling or Investing

Owning a rental property in the UK means buy-to-let tax becomes part of your investment. You have to pay different taxes at different points: when you buy, sell or even earn income from it. Any changes to tax rules and rising costs not only impact tax bills but also property management, rental returns, and the long-term value of your investment. So, it is better to know what other taxes you need to pay, which rates currently apply, and if there is any way to reduce or calculate them.

Which Taxes Apply Under Buy-to-Let Tax and When?

Buy-to-let tax is not a single charge. You may pay tax when you buy a property, earn rental income, sell it, or pass it on as part of your estate. The main taxes in the UK include:

The specific tax you’ll pay depends on how you own the property (ownership structure) and what you do with it. For example, the rules can be different if you own the property personally or through a limited company, or if it is a buy-to-let property, a second home, or a furnished holiday let.

Income Tax on Buy-to-Let Rental Income

If you rent out a buy-to-let property, you need to pay Income Tax on the money you make. However, you don’t have to pay tax on all the rent you collect. You only pay on your rental profit after subtracting allowable expenses. Rental profit counts as taxable income in the UK.

One more thing, rental profit will be added to any other income you earn during the tax year, such as your salary, pension, or self-employment income. The total combined amount then decides which Income Tax band applies. 

There is no separate “landlord tax rate”. Rental profit is simply taxed in the same way as the rest of your income.

Example: Suppose you earn £35,000 a year from your job and make £10,000 in rental profit. Your total taxable income becomes £45,000. The rental profit is added to your salary, and the combined amount decides which Income Tax band applies.

Rental Income Tax Calculator

Knowing current tax rates is the first step in tax planning. The next step is estimating how much you actually have to pay, as the final amount depends on multiple factors: rental income, allowable expenses, mortgage costs, ownership structure, and other earnings.

Use our rental income tax calculator to estimate how much tax you may need to pay on your rental profits in seconds.

How Rental Profit Is Calculated

Rental profit and total rent you receive are not the same thing. It’s the amount left after you subtract your allowable expenses from rental income, on which you have to pay income tax later.

Total Rent You Collect – Allowable Expenses = Rental Profit 

For example, if you receive £18,000 in rent over the year and have £4,000 in allowable expenses, your rental profit is £14,000. You only pay tax on £14,000, not on the total £18,000.

Allowable expenses can include:

• Letting agent fees
• Landlord insurance
• Ground rent and service charges
• Repairs and maintenance
• Accountancy fees

Mortgage interest works differently. You cannot simply deduct it from your rental income.

Limited Company vs Personal Ownership Tax Rates

The biggest tax decision landlords have to make before starting anything is whether they want to own a rental property personally or through a limited company. The option you choose can affect how much tax you pay and how mortgage interest is treated.

A limited company can reduce the tax you pay on rental profits because mortgage interest is fully deductible. However, if you take money out of the company, you may also need to pay Dividend Tax.

From April 2026, the ordinary dividend tax rate is 10.75%, the upper rate is 35.75%, and the additional rate remains 39.35%.

The best option depends on your circumstances. If you plan to leave profits in the company, a limited company may be more tax-efficient. But if you regularly take money out for personal use, the tax savings may be smaller because Dividend Tax also applies.

Buy-to-Let Stamp Duty Tax

You usually have to pay Stamp Duty Land Tax (SDLT) if you buy a buy-to-let property in England or Northern Ireland. As it is an additional property, you’ll also pay a 5% surcharge on top of the standard SDLT rates.

Example: You buy a £300,000 buy-to-let property. After the 5% surcharge is applied across the different tax bands, your Stamp Duty bill is around £16,000.

Capital Gains Tax (CGT) on Buy-to-Let Properties

Selling a buy-to-let property for more than you paid for it? You need to pay Capital Gains Tax (CGT) on the profit you make from selling it rather than on the full sale price. This is because a buy-to-let property is not your main home, so it does not qualify for Private Residence Relief.

Every individual also gets a £3,000 tax-free CGT allowance each tax year (£1,500 for most trusts). You only pay CGT on the part of your gain that is above this allowance.

Allowable Deductions to Reduce CGT

You can reduce your taxable gain by deducting certain costs, including:

• Stamp Duty paid when you bought the property
• Solicitor and estate agent fees for buying and selling
• Survey and valuation fees
• The cost of genuine property improvements, such as an extension or a new kitchen

Routine repairs and maintenance cannot be claimed as improvement costs for CGT.

Example: You buy a property for £200,000, spend £15,000 on improvements, and later sell it for £300,000. Your gain is £85,000 before your annual CGT allowance is deducted.

Mortgage Interest Tax Relief (Section 24)

Section 24 changes the way you claim tax relief on your mortgage interest if you own a rental property as an individual landlord. It was introduced in the Finance (No. 2) Act 2015, then phased in April 2017, but takes full effect in April 2020. 

How Section 24 Restricts Relief for Individual Landlords

Before this rule, landlords could deduct their mortgage interest from their rental income before calculating tax. Now, if you own a rental property in your own name, you can’t do that. You can get a tax credit worth 20% of your mortgage interest, whatever your tax rate.

Impact on Higher-Rate Taxpayers

If you pay basic-rate tax, this change makes little difference because the 20% tax credit is similar to the tax relief you used to get.

But for higher-rate (40%) or additional-rate (45%) taxpayers, the impact can be much bigger. You pay tax on your rental income at your normal tax rate, but mortgage interest only gets relief at 20%. This can mean landlords paying tax on income that they haven’t really kept. In some cases, tax bill can be even higher than your actual rental profit.

What About Limited Companies? 

Section 24 only applies to properties that are owned by individuals. If you own through a limited company, the company can still deduct mortgage interest as a business expense before paying corporation tax.

This is the reason many landlords have considered moving their properties into a limited company. However, transferring property can involve extra costs and taxes, so it’s important to get professional advice before making a decision.

Making Tax Digital (MTD) for Landlords

From 6 April 2026, landlords who come under MTD cannot file just one tax return each year. Now they have to keep digital records and send HMRC updates throughout the year using approved software. At the end of the tax year, you must submit a final declaration.

This means you’ll make five submissions each year instead of one annual Self Assessment tax return.

If you’re new to Making Tax Digital, you’ll still complete a normal Self Assessment tax return for the tax year before you join the scheme.

MTD Timeline & Income Thresholds (2026 rollout)

MTD is based on gross income, not profit. It’s best to check your figures if you’re close to the thresholds mentioned above. 

Inheritance Tax for Buy-to-Let Property

Rental property also counts as part of your estate for Inheritance Tax, just like any other asset owned when you pass away. So you have to pay IHT if you own a buy to let property in the UK. 

How Buy-to-Let Property Is Valued for IHT

The value of property is based on its open market value at the time of death. If you still have a mortgage, the amount you owe is taken away first. To calculate the total value of estate, the remaining value is then added to other assets, such as savings, investments, and other properties.

Ways to Reduce Inheritance Tax Exposure

A few simple ways landlords try to reduce IHT bills include: 

• Gifting property during their lifetime (the seven-year rule applies before it’s fully outside the estate)
• Placing life insurance in trust to cover a future IHT bill
• Passing shares in a property company to family members gradually
• Using the nil-rate band (£325,000) and residence nil-rate band (£175,000) where they apply

Rental property usually does not qualify for Business Relief in the same way as a genuine trading business. HMRC generally sees ordinary property letting as an investment activity rather than a business trade, which means most landlords cannot rely on this relief to reduce their Inheritance Tax bill.

Furnished Holiday Lets (FHL) and Airbnb Tax

The tax rules for holiday lets have changed. The Old Furnished Holiday Let (FHL) tax regime, which gave you as a holiday-let owner some extra benefits as compared to a normal landlord, has ended from 6 April 2025.

Tax Changes After FHL Regime Abolition

Before this change, holiday-let owners could claim several valuable tax breaks, including:

1. Full mortgage interest relief: They could deduct all of their mortgage interest from their rental profits.
2. Lower tax when selling: They could qualify for a reduced rate of Capital Gains Tax in some cases when selling the property.
3. Inheritance Tax relief: Some owners could claim relief from Inheritance Tax, depending on their circumstances. 

One useful change: If your holiday lets make a loss in earlier years, you don’t have to keep those losses tied to holiday-let income anymore. Because now you can use them to reduce profits from your other rental properties as well. 

How Short-Let/Airbnb Income Is Taxed Differently

Income from Airbnb or other short-term lets is still treated as rental income. It doesn’t become a business just because guests stay for a few nights.

It would only be treated as a trade if you’re offering hotel-style services, such as regular meals, daily housekeeping, or other extras that go well beyond simply providing a place to stay. Most Airbnb hosts don’t do this, so their income stays within the normal property tax rules.

If you’re renting out a room in your own home, you may still be able to claim Rent a Room Relief.  You can earn up to £7,500 a year tax-free from letting out that room. The relief hasn’t changed. It’s a simple way to reduce the tax on income you earn by taking in a lodger or occasional guest.

Tax Implications for Second Homes

Own a second home?  That doesn’t mean you have to pay tax straight away. If you are using the property yourself and don’t rent it out, then you won’t pay income tax because there’s no rental income. However, you may still have to pay other property taxes.

Many people think they can sell both of their homes totally tax-free, but that’s not how the rules work. You can only have one main home at a time for Private Residence Relief. This means only your main residence can usually qualify for full capital gains tax relief when you sell it. If you sell a second home that isn’t your main residence, you may have to pay Capital Gains Tax on any profit.

Second Home vs Buy-to-Let: Tax Differences

Tax Planning for Married Couples & Civil Partners

Ownership structure between spouses or civil partners can change how their rental income gets taxed.

Splitting Rental Income Between Spouses

In a jointly owned property structure, HMRC gives each of you a 50/50 tax split on rental income, even if you own different shares. However, you need to send HMRC a Form 17 and provide proof of your ownership split if you want to be taxed based on your actual ownership. 

Transferring Property to a Lower-Tax-Rate Partner

Transfers between spouses and civil partners happen on a “no gain, no loss” basis for CGT. This is useful if one person pays less income tax, because more rental income can be taxed at the lower rate in this way. However, Stamp Duty Land Tax still apply if there is a mortgage on the property share you transferred. 

Joint Tenants vs Tenants in Common (Tax Implications)

Joint tenants own the whole property together, so rental income is normally split 50/50. Tenants in common, on the other hand each own a set share of the property. For example, one person could own 90% and the other 10%. If you tell HMRC by submitting Form 17, your rental income can be taxed based on those ownership shares instead of being split equally.

New Landlord Tax Bands from 2027

From April 2027, the tax rates on property income will increase by 2 percentage points for every tax band. These higher rates apply only to income from property, such as rent from buy-to-let homes. They do not change income tax rates on earnings from employment, pensions, or other types of income.

How to Reduce Tax on Buy-to-Let Properties?

A combination of structure, expense tracking and available reliefs can make a difference to a landlord’s tax bill.

Use a Limited Company Structure

Moving your property into a limited company can reduce the tax you pay on profits and may allow you to claim full mortgage interest relief again. But this option can work well for landlords who want to keep their profits in the business and use them to buy more properties. However, if you take some money out for personal use, you may have to pay extra tax on dividends.

Deduct Allowable Expenses

Many landlords miss out on expenses they can claim. These can include:

• Letting agent and property management fees
• Landlord insurance costs
• Accountant fees
• Advertising costs when looking for new tenants
• Ground rent and service charges for leasehold properties

So keep a record of these costs to reduce taxable profit. 

Claim Replacement of Domestic Items Relief

If you replace items in your rental property, you may be able to claim tax relief. This can include things like a sofa, carpet, fridge, or other household items.

The relief usually covers replacing old items with similar ones. However, you cannot claim for buying these items when you first set up the property for renting.

Understanding Regional Variations in Buy-to-Let Taxation

Property purchase tax is different depending on where you live in the UK. Scotland uses Land and Buildings Transaction Tax (LBTT) instead of SDLT, and Wales uses Land Transaction Tax (LTT). Both have their own tax rates and extra charges for buying additional properties.

In Scotland, the Additional Dwelling Supplement is 8%. Unlike England’s surcharge, it is charged on the full property price, not added in separate bands. However, in Wales, the higher rate surcharge for additional properties is 5%.

Scotland and Wales do not charge the extra 2% surcharge for non-UK residents that applies in England and Northern Ireland. This means overseas buyers may pay different amounts depending on where they’re buying a property to let. 

Rental income tax also works differently in Scotland. If you are a Scottish taxpayer, your rental profit is taxed using the Scottish income tax rates and bands set by the Scottish Parliament. However, CGT and IHT rules are the same across the whole UK.

Common Mistakes Landlords Should Avoid

Not keeping receipts: Without proof of your expenses, it can be much harder to support your claims if HMRC asks questions.

Missing MTD deadlines: Once the rules apply, remember to submit quarterly updates on time.

Not declaring Airbnb income: Since January 2024, platforms have had to report host earnings to HMRC. The first reports were sent in January 2025. So make sure you declare your income correctly.

Not saving for CGT: If you sell a UK residential property, you need to report and pay Capital Gains Tax within 60 days of completion, not by the usual Self Assessment deadline. So missing this deadline can lead to penalties as well as the high tax bill.

How Real Estate Agents in London Help with Buy-to-Let Tax Planning

Every area of London is different. Rental values, demand and property costs can change from one borough to another, which means the right tax and ownership approach depends on the property. Working with landlords across London means seeing how these tax rules affect real rental decisions. 

So from keeping rental income records accurate to identifying when new reporting rules may apply, experienced property managers help landlords make better decisions.

Need support to manage your rental property? Speak to a team that understands London rentals and helps you manage your property tax obligations.

Frequently Asked Questions