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UK stamp duty calculator
SDLT on residential purchases incl. additional-property surcharge.
About this calculator
What it estimates
Stamp Duty Land Tax on a residential purchase in England or Northern Ireland, with the additional-property surcharge where relevant.
Assumptions (UK 2025/26 tax year rates)
- •Standard bands: 0% to £125,000, 2% to £250,000, 5% to £925,000, 10% to £1.5m, 12% above
- •5% surcharge on the whole price for additional properties
- •First-time-buyer relief and non-resident surcharge not applied
Estimates only, for orientation. Rates and thresholds change each tax year and your actual liability depends on facts this tool does not ask for. This is not tax advice.
For US–UK filers
Why your real number differs
Non-UK-resident buyers pay a further 2% surcharge, and a US person buying UK property should also think ahead to the US treatment of a future sale and of any sterling mortgage.