What is Stamp Duty? Stamp Duty is a tax you might have to pay if you buy a residential property or a piece of land in England and Northern Ireland. The amount of Stamp Duty depends on the purchase price of the property. From the 8th July 2020 until 31st March 2021, anyone buying a primary residential property up to the value of £500,000 will have no Stamp Duty Land Tax (SDLT) to pay. This is a...