NCT

National Curriculum Tests, in the English education system

Nashville Children's Theatre, the oldest professional children's theatre company in the United States

National Comedy Theatre, an improvisational theatrical company in the United States

Niagara College Teaching Winery, a college in Ontario, Canada, which produces wine sold locally

National Car Test, Ireland, a roadworthiness test for cars

(Ireland) : a roadworthiness test for cars that must be periodically undertaken once the vehicle is more than three-and-a-half years old.