Buy-to-let investors pay a higher rate of Stamp Duty Land Tax than owner-occupiers. Here's exactly how much you'll pay and how to calculate it.
Stamp Duty Land Tax (SDLT) is one of the most significant upfront costs for buy-to-let investors. Understanding the rates — and any relief that may be available — is essential before committing to a purchase.
The additional rate surcharge
Since April 2016, buyers of second residential properties — including buy-to-let investments — have been required to pay an additional 3% SDLT surcharge on top of the standard residential rates. This applies to any purchase of a second property where the purchaser already owns a home.
From October 2024, the surcharge was increased to 5%.
Current SDLT rates for buy-to-let (2025)
For a £200,000 investment property, the SDLT calculation is: 5% on the entire purchase price (up to £250,000) plus the additional rate surcharge: total 10% on amounts up to £250,000. For a £300,000 property, calculations become tiered.
Always use the government's SDLT calculator for precise figures on any specific purchase.
Limited company purchases
Purchases through a limited company are subject to the same SDLT rates but not the higher residential surcharge in some circumstances. This is a complex area and specialist advice from a property solicitor and accountant is essential.
Multiple dwellings relief
Multiple Dwellings Relief (MDR) previously allowed investors buying multiple properties in a single transaction to calculate SDLT on the average price of each property rather than the total consideration. MDR was abolished in June 2024.
Planning your purchase
SDLT should always be budgeted for before committing to a purchase. On a typical Essex investment property at £250,000, SDLT could amount to £17,500 or more. Build this into your investment calculations alongside legal fees, survey costs and any renovation works.
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