Who pays the non-UK resident surcharge
HMRC applies a 2% surcharge on top of all other SDLT rates when you were not present in the UK for at least 183 days during the 12 months before the transaction completes. The test is about physical presence, not nationality or tax residency status alone.
On a £500,000 purchase as your only home, standard SDLT is £15,000. With the non-resident surcharge it rises to £25,000 — an extra £10,000 because 2% applies to the full price through the band structure.
Buying a second home from abroad
If you are a non-UK resident buying a buy-to-let or holiday home, both the 5% additional property surcharge and the 2% non-resident surcharge apply. Use the calculator above and tick both options, or read our buy-to-let calculator and non-resident guide.