Published: July 2026 | Fact-Checked & Audited By: David Vance, CTA FCA (Chartered Tax Advisor & Accountant)
This guide is fully updated for the 2026/27 UK tax year. All Stamp Duty Land Tax (SDLT) calculations and property tax rules have been audited against official HMRC guidelines.
In 2016, the UK government introduced a Stamp Duty Land Tax (SDLT) surcharge on additional properties to regulate the buy-to-let market and support first-time residential buyers. This surcharge adds a significant tax premium onto the purchase of second homes, holiday properties, and residential investments. In this comprehensive guide, we explain the mechanics of the additional property surcharge, outline current tax rates, and detail the rules for replacing a main residence and claiming refunds.
The Additional Property Surcharge Rates
The surcharge is a flat rate added to the standard residential SDLT rates. For the 2026/27 tax year, the additional property surcharge is **5%** (having increased from 3% in recent budgets). The progressive rates for additional properties are:
| Property Value Band | Surcharge SDLT Rate (Standard + 5%) |
|---|---|
| Up to £250,000 | 5% |
| £250,001 to £925,000 | 10% |
| £925,001 to £1,500,000 | 15% |
| Over £1,500,000 | 17% |
To verify how this 5% surcharge affects your purchase costs, use our Stamp Duty Calculator. If you are comparing limited company vs personal investment structures, check out our Property Limited Company vs Personal Tax Calculator and analyze mortgage payments using our Mortgage Calculator.
What Counts as an “Additional Property”?
HMRC applies the 5% surcharge to any residential transaction that meets the following criteria:
- Multiple Ownership: At the end of the day of the transaction, the buyer owns more than one residential property globally.
- Interest Size: The buyer’s interest in the new property is valued at £40,000 or more.
- Not a Main Residence Replacement: The new property is not replacing the buyer’s sole or main residence.
Note that if a property is purchased through a limited company, the 5% surcharge applies to the first property purchase, as companies do not have a personal “main residence” exemption.
Replacing a Main Residence & Claiming SDLT Refunds
If you purchase a new home before selling your previous main residence, you must pay the 5% surcharge on the purchase because you temporarily own two properties.
However, if you sell your previous main residence within **3 years (36 months)** of the new purchase, you can claim a full refund of the 5% surcharge. You must submit your refund claim to HMRC within 12 months of selling your previous home, or within 12 months of the filing date of the new property’s SDLT return, whichever is later.
References & Official Sources
This guide is formulated in accordance with the following official legislation and guidelines:
- Finance Act 2016 (Schedule 4ZA): The statutory rules establishing higher rates of Stamp Duty Land Tax on additional properties.
- HMRC Guidance: Stamp Duty Land Tax: buying an additional residential property: Official guidance on eligibility, timelines, and refund claims.
Frequently Asked Questions: Additional Property Surcharge
Q: How long do I have to sell my old house to claim a Stamp Duty refund?
A: You must sell your previous main residence within 3 years (36 months) of purchasing your new property to claim a refund of the 5% surcharge.
Q: Does the 5% surcharge apply if I buy a property through a Limited Company?
A: Yes. Limited companies must pay the 5% surcharge on all residential property purchases, starting from their very first transaction.