The stamp duty land tax (SDLT) rules that can apply when a tenant holds over a lease are complex. In particular, the rules have been amended since SDLT was first introduced in 2003 and different rules can apply to particular scenarios with different results. The particular rules which apply will depend on, among other considerations: • whether the original lease was a stamp duty or SDLT lease • when the original lease was granted and terminated, and • when any new lease is granted The rules are contained in Schedule 17A to the Finance Act 2003 (FA 2003). FA 2003, Sch 17A, para 3 FA 2003, Sch 17A, para 3 applies to leases which continue after a fixed term. As a general rule the tenant has an obligation to recalculate the SDLT due on the lease as if the lease was a fixed term lease for its original term plus one year and pay any additional SDLT to HMRC.