Smith was a wild card entry into the 2018 PDC World Darts Championship. He hit a 170 checkout on his way to a 2–0 win against Luke Humphries in the preliminary round. In the first round Smith lost 3–0 to Gary Anderson. After his first round defeat in the 2018 PDC World Darts Championship he announced ‘I definitely will be playing Q-school this year, based on the current situation. I owe it to my family and my sponsors to carry on playing, wherever it takes me. I will do just that.’ Smith failed to gain a tour card at Q-School. Smith qualified for the 2019 PDC World Darts Championship by winning the North American Darts Championship, securing his place with a 6–4 win over John Norman Jnr.