Stamp Duty on Second Homes and Additional Properties

Who this guide is for: For buyers of a second home, buy-to-let or other additional dwelling in England or Northern Ireland who need a plain-English overview of higher Stamp Duty Land Tax rates — not conveyancer advice or a full HMRC eligibility assessment.

When you buy an additional residential property in England or Northern Ireland, you can face higher rates of Stamp Duty Land Tax (SDLT) — often called second-home Stamp Duty or the additional-property surcharge. That usually means 5 percentage points on top of the ordinary residential bands.

Higher rates are common for second homes and buy-to-let purchases, but the legal test looks at your wider ownership and circumstances. Replacing a main residence can be treated differently. Residential property owned overseas can matter. Scotland and Wales use different property taxes (LBTT and LTT), not SDLT.

Sorvuna's Stamp Duty Calculator can estimate the tax for supported England and Northern Ireland residential paths — including an additional-property option — after you choose which treatment applies. It does not determine whether the higher rates legally apply to you.

SDLT is charged in bands. Different percentages apply to successive portions of the purchase price (the chargeable consideration — usually the price you pay). Higher rates for additional dwellings use a separate table that is generally the ordinary residential rates plus 5 percentage points.

Two dates matter. The higher-rates uplift increased from 3 percentage points to 5 percentage points above the standard residential rates for relevant transactions with an effective date on or after 31 October 2024. The current 5% / 7% / 10% / 15% / 17% higher-rate band table then results from combining that 5-point surcharge with the standard residential bands that apply from 1 April 2025. The surcharge itself did not first start on 1 April 2025.

In plain English, HMRC looks at whether the purchase leaves you (and, where the rules require it, people connected to you) owning more than one relevant residential property. Intending to live there yourself, or intending to let it out, does not by itself decide the answer.

The £40,000figure is applied to the relevant interest, not casually to the whole house price. For the new purchase, HMRC looks at the chargeable consideration for the interest you are acquiring. For any other dwelling you already own, it looks at the market value of your interest in that other dwelling. Mixed-use property (for example a shop with a flat above) is treated under different rules and is not modelled in Sorvuna's calculator.

A straightforward second-home purchase — keeping your current home and buying another dwelling for holidays or occasional use — is a classic higher-rates case where you still own both at completion.

Calling something a holiday home does not create a separate SDLT schedule. What matters is whether the higher-rates ownership and replacement conditions are met on the facts.

Buying a rental property while you already own your home usually attracts higher rates for the same ownership reason. The SDLT treatment turns on the transaction and what you own at completion — not on the marketing label “buy-to-let”.

Ongoing tax on rent is separate. See Buy to Let Tax Explained and Rental Income Tax Explained.

Replacing your only or main residence can keep you out of the extra 5% — but timing matters.

• If you have already sold or given away your previous main home (or do so on the same day as completion) and the replacement conditions are met, you usually do not pay the higher rates on the new main home.
• If you complete the new main home before disposing of the old one, you usually pay higher rates at completion because you own two homes that day.
• If you later dispose of the previous main home within 36 months and meet the conditions, you may reclaim the higher-rates element as a refund.

Where you paid higher rates because you had not yet disposed of your previous main home, and you later sell or give it away within 36 months, you can usually apply for a refund of the higher-rates part of the bill.

For disposals on or after 29 October 2018, HMRC must normally receive the claim within 12 months of the later of the sale date and the filing date of the SDLT return for the new home. An eligible higher-rates refund can be claimed using HMRC's online refund service. A postal route also exists. Form SDLT16 remains relevant as a fallback where the dedicated online higher-rates service cannot be used. Your conveyancer may help, but you remain responsible for accuracy.

Sorvuna does not calculate or file refunds. Select I'm replacing my main home in the calculator only when you assert that higher rates are not due; use the additional-property path to estimate what was paid at completion before any later reclaim.

For the higher-rates ownership test, count residential property you own or part-own anywhere in the world, not only in England or Northern Ireland — if the market value of your interest in that other dwelling is £40,000 or more.

So buying a first home in England while still owning a flat abroad can still fall into higher rates. That worldwide count is separate from the 2% surcharge that can apply when the buyer is not a UK resident for SDLT purposes.

For joint purchases, the higher-rates rules are applied to each buyer (and, where relevant, their spouse or civil partner). If any of you is caught, the whole transaction usually pays higher rates — even if the other buyer owns nothing else.

Spouses and civil partners who are living together are generally treated as connected for these rules even when only one of them is named on the purchase. Permanently separated couples are treated differently — see HMRC guidance rather than assuming the same outcome.

Keep the two £40,000 tests separate:

• For the new purchase, HMRC looks at the chargeable consideration (or value of the interest acquired) for that single dwelling or share. A share bought for less than £40,000 is generally outside higher rates even if the whole property is worth more.
• For any other dwelling you already own, HMRC looks at the market value of your interest in that other dwelling. If you jointly own a £150,000 property but your interest is worth only £30,000, that interest does not by itself meet the £40,000 ownership threshold.

The floor is not a general SDLT exemption for cheap purchases, and several small interests below £40,000 are not added together to push you over the line.

Inherited shares can also be disregarded in limited cases: where you inherited a joint interest of no more than 50% (aggregating a spouse or civil partner's share), that interest can be ignored for three years from the inheritance. If your combined share later exceeds 50%, or the three years pass, it can start to count. Complex estates need HMRC's Stamp Duty Land Tax manual.

Companies are usually within the higher residential rates when the chargeable consideration for the dwelling interest acquired is £40,000 or more (subject to certain lease-interest exceptions). That is not the same journey as an individual second-home calculation.

Separately, certain non-natural persons buying residential property for more than £500,000 may face a single 17% rate instead. Reliefs and trustee exceptions exist. Sorvuna's public Stamp Duty Calculator does not model company, trust or corporate single-rate cases — use HMRC guidance or a specialist adviser for those.

A separate 2% surcharge can apply to residential purchases by non-UK residents (broadly, not present in the UK for at least 183 days in the 12 months before the purchase). It can sit on top of higher rates for additional dwellings.

Residence for SDLT uses its own tests. The Sorvuna calculator does not currently model the non-UK resident surcharge.

First-time buyer relief has ownership-history conditions. If you already own another dwelling, you are not usually a first-time buyer for SDLT. See Stamp Duty Explained for the overview, and use the calculator's first-time buyer path only where you assert relief applies.

Mixed-use and wholly non-residential purchases use different SDLT rules. Do not assume the residential additional-property table applies to a shop with living space or to commercial land. Those paths are outside Sorvuna's public calculator scope.

Multiple Dwellings Relief (MDR) was abolished for transactions that complete or substantially perform on or after 1 June 2024. For current purchases, do not budget on the basis that MDR is still generally available. From that date, buying six or more dwellings in one transaction generally uses non-residential rates instead of the residential higher-rates table.

Figures use Sorvuna's Stamp Duty engine for England and Northern Ireland residential purchases on or after 1 April 2025. They assume the stated facts; they do not prove eligibility.

Estimate Stamp Duty on your property purchase Use the Stamp Duty Calculator →

The calculator estimates SDLT after you tell it which treatment applies. It does not determine your legal property-ownership status, run spouse or worldwide ownership tests, or calculate later refunds.

For the wider SDLT overview, see Stamp Duty Explained. For landlord Income Tax after purchase, see Buy to Let Tax Explained. Browse the property tax hub for Stamp Duty, rentals and property Capital Gains Tax together.