UK Stamp Duty (SDLT) Calculator 2026

Free SDLT calculator for England and Northern Ireland (LBTT for Scotland and LTT for Wales handled separately). Works out the stamp duty payable on a residential purchase, including the 5% surcharge for second homes and buy-to-let, and the 17% rate that can apply to companies buying above £500,000.

SDLT rates at a glance (England and Northern Ireland)

• Up to £125,000: 0% (standard), 5% (additional property / BTL)
• £125,001 to £250,000: 2% / 7%
• £250,001 to £925,000: 5% / 10%
• £925,001 to £1.5m: 10% / 15%
• Over £1.5m: 12% / 17%

First-time buyers pay nothing up to £300,000 and 5% on the portion from £300,001 to £500,000, with no relief if the price is over £500,000. The 5% surcharge applies to additional residential properties whether held personally or in a limited company, and non-UK residents pay a further 2%.

Why SDLT matters for landlords

For UK landlords, stamp duty is one of the biggest upfront costs of expanding a portfolio. The 5% surcharge alone adds £10,000 to a £200,000 buy-to-let purchase. Modelling SDLT alongside rental yield helps you decide whether a deal stacks up. Pair this with our rental yield calculator for the full picture.