Land Transaction Tax (LTT) is a property tax in Wales. It replaced the Stamp Duty Land Tax from 1 April 2018. It became the first Welsh tax in almost 800 years. LTT is a tax applied to residential and commercial land and buildings transactions (including commercial purchases and commercial leases) where a chargeable interest is acquired. Under the Land Transaction Tax and Anti-avoidance of Devolved Taxes (Wales) Act 2017, a land transaction must be notified to the Welsh Revenue Authority unless it falls within one of the exempt categories contained in the Act.