A predicate offence is a smaller crime in a large-scale criminal activity, such as money laundering or organised crime, which is often treated as a component of a bigger, complex scheme. It’s often used to describe crimes like money laundering and terrorism financing. It’s the crime that creates the illegal money used in further laundering activities.
In other words, in the context of anti-money laundering (AML) compliance, a predicate offence is a crime that uses dirty or illegal money, such as funds that criminals gain through drug sales or human trafficking. Criminals then try to hide this money and make it look legitimate through various money laundering tactics.