Commercial Property SDLT Baseline
Unlike residential property, commercial property purchases do not attract the 3% SDLT surcharge, and the nil-rate band currently starts at £150,000.
When purchasing non-residential or mixed-use properties, the Stamp Duty Land Tax (SDLT) calculations are significantly more favorable compared to standard residential investments.
First, commercial properties are completely exempt from the 3% additional dwelling surcharge that plagues buy-to-let investors. Second, the SDLT threshold for commercial property currently sits at £150,000 (meaning you pay 0% SDLT on the portion of the purchase price up to £150,000).
Mixed-Use Advantage
One powerful strategy is purchasing 'mixed-use' properties—such as a retail shop with a residential flat above. Because the building contains a commercial element, the entire purchase is often classed as mixed-use and is taxed under the lower commercial SDLT rates, avoiding the 3% residential surcharge entirely.