If you're buying a second property in the UK — whether a buy-to-let investment, a holiday home, or an additional residence — you'll pay significantly more stamp duty than a standard buyer. The additional dwelling surcharge is currently 5% on top of every band, and it applies from the very first pound.

This guide explains exactly how the buy-to-let stamp duty surcharge works in England, Scotland, and Wales, with real worked examples so you can calculate your tax bill before you commit.

You can also use our stamp duty calculator — just tick the "additional property" checkbox to see your exact liability instantly.

What Is the Buy-to-Let Stamp Duty Surcharge?

Stamp Duty Land Tax (SDLT) in England and Northern Ireland applies to all residential property purchases. For buyers purchasing an additional residential property — including buy-to-let properties — an extra 5% surcharge is added to every rate band.

This surcharge was first introduced in April 2016 at 3%, then increased to 5% in October 2024. It applies whether you're buying in your own name or through a limited company, and it kicks in from the very first pound of the purchase price.

The practical effect is that a buy-to-let investor pays much more stamp duty than someone buying the same property as their only home.

Current Buy-to-Let Stamp Duty Rates 2026

Here's how the rates compare for a standard buyer versus a buy-to-let or second-home buyer in England and Northern Ireland:

Important: Note that from 1 April 2025, the standard nil-rate threshold reverted from £250,000 back to £125,000 (the temporary relief introduced in September 2022 expired). This means even standard buyers now pay 2% on the £125,001–£250,000 band.

Worked Examples: How Much Will You Actually Pay?

Let's run through four common price points to show exactly what a buy-to-let investor pays in stamp duty.

Example 1: £150,000 Buy-to-Let Property

• 0–£125,000 at 5% = £6,250
• £125,001–£150,000 at 7% = £1,750
• Total SDLT: £8,000

A standard buyer purchasing the same property as their main home would pay: £125k at 0% + £25k at 2% = £500. The surcharge adds £7,500.

Example 2: £250,000 Buy-to-Let Property

• 0–£125,000 at 5% = £6,250
• £125,001–£250,000 at 7% = £8,750
• Total SDLT: £15,000

A standard buyer would pay: £0 + £2,500 = £2,500. The surcharge adds £12,500.

Example 3: £350,000 Buy-to-Let Property

• 0–£125,000 at 5% = £6,250
• £125,001–£250,000 at 7% = £8,750
• £250,001–£350,000 at 10% = £10,000
• Total SDLT: £25,000

A standard buyer would pay £2,500 + £5,000 = £7,500. The surcharge adds £17,500.

Example 4: £500,000 Buy-to-Let Property

• 0–£125,000 at 5% = £6,250
• £125,001–£250,000 at 7% = £8,750
• £250,001–£500,000 at 10% = £25,000
• Total SDLT: £40,000

A standard buyer would pay £2,500 + £12,500 = £15,000. The surcharge adds £25,000.

These figures illustrate just how significant the buy-to-let stamp duty surcharge is — particularly at higher price points. Factor it into your purchase costs before making an offer.

When Does the Surcharge Apply?

The additional 5% surcharge applies when you're purchasing a residential property and you will own two or more residential properties at the end of the transaction. It doesn't matter whether you intend to let the property out — the test is simply whether you'll own more than one residential property.

This means the surcharge applies to:

• Buy-to-let investments
• Holiday homes and second homes
• Properties bought as gifts for children or family members (if the buyer already owns a home)
• Purchases by limited companies (see below)

Exceptions and Exemptions

There are a handful of important exceptions to the surcharge:

Replacing Your Main Residence

If you're selling your main home and buying a new one, you pay standard rates — even if you temporarily own two properties during the overlap. However, if you don't sell your old home on the same day as buying the new one, you'll pay the surcharge upfront and then need to claim a refund within 12 months of selling the previous main residence.

Properties Under £40,000

The surcharge does not apply if the property costs less than £40,000. In practice, this means it rarely applies to very cheap properties, but most UK property is well above this threshold.

Caravans, Mobile Homes and Houseboats

These are not classed as residential property for SDLT purposes, so the surcharge does not apply regardless of what else you own.

Inherited Properties

If you inherit a property, it does count towards your property count for surcharge purposes from the point of inheritance onwards. However, the inheritance itself does not trigger a stamp duty charge.

Scotland: Additional Dwelling Supplement (ADS)

In Scotland, the equivalent tax is Land and Buildings Transaction Tax (LBTT). The additional dwelling surcharge is called the Additional Dwelling Supplement (ADS), and it currently stands at 8% — even higher than England's 5%.

The ADS applies to the full purchase price (not just the slice above a threshold), making it particularly punishing at lower price points. A £200,000 buy-to-let in Scotland attracts £16,000 in ADS alone, on top of any standard LBTT.

Wales: Higher Residential Rates (HRR)

In Wales, the equivalent tax is Land Transaction Tax (LTT). The surcharge for additional properties is known as the Higher Residential Rates, and it adds 4% to each band (slightly less than England's 5% but still significant).

Limited Company vs Personal Name

A common question from buy-to-let investors is whether buying through a limited company avoids the stamp duty surcharge. The short answer is no — the surcharge applies to companies purchasing residential property, just as it does to individuals.

There may be other tax advantages to using a limited company structure (primarily around mortgage interest relief), but stamp duty savings are not among them. Always take professional tax advice before deciding on your purchase structure.

How to Calculate Your Buy-to-Let Stamp Duty

The quickest way to work out exactly what you'll pay is to use our free stamp duty calculator. Simply enter the property price and tick the "additional property" checkbox — the calculator will instantly show your full SDLT bill, broken down by band.

Once you know your stamp duty liability, you can also:

• Use our mortgage calculator to model the monthly repayments on a buy-to-let mortgage
• Use our rental yield calculator to see whether the property stacks up as an investment

Tips for Buy-to-Let Investors

• Budget for stamp duty upfront: The surcharge can add tens of thousands to your purchase costs — make sure you have enough cash reserved.
• Check if you qualify for a refund: If you paid the surcharge because you hadn't yet sold your main home, claim your refund within 12 months of completing the sale.
• Consider the full cost picture: Factor in stamp duty, legal fees, mortgage arrangement fees, and any refurbishment costs when calculating your return on investment.
• Take professional advice: Tax rules change frequently. A specialist property tax adviser can ensure you're not paying more than you should.

Summary

Buy-to-let stamp duty in the UK is significantly higher than the standard rate, thanks to the 5% additional dwelling surcharge that was increased in October 2024. On a £350,000 property, a buy-to-let investor pays £25,000 in stamp duty compared to just £7,500 for a standard buyer — a difference of £17,500.

Use our stamp duty calculator to get an exact figure for your purchase, and factor the full cost into your investment decision before committing.