TCR Class (2018 - )

The international TCR Touring Car class was formally adopted in 2018 as a permanent replacement for the sedan/hatchback based classes. Still running to this date, CTCC is only Canadian series that has the homologated license to run this class. The car count in this class grows every year.

GT Sport Class (2014 - )

The Grand Touring Class previously appeared only in CTCC's inaugural season in 2007, but rejoined the series in 2014 and includes makes such as Mustang, BMW, Nissan and Porsche. The class was briefly split into GT Sport and GT Cup. The class now includes a wider vehicle list.

GT Cup Class (2018 - 2019)

This GT Cup class comprised ultra performance race cars such as Corvette, Viper, Ferrari 430/458, Nissan GTR and Porsche 991/991 GT3.  GT Cup class race cars competed on the track concurrently with the existing Touring, Super Touring and GT Sport classes.

Super Touring Class (2007 - 2019)

Super Touring Class machines have powerful and heavily modified engines and advanced aerodynamics. As with Touring Class, Super was replaced by the international TCR class.

Touring Class (2007 - 2019)

This class was the initial class of the championship, along with Super Touring. The Touring Class featured cars with minimal modifications. Touring Class was superseded by TCR

B-Spec Class (2013-2014)

The concept of B-Spec was first developed through collaboration between Honda Performance Development and Mazdaspeed Motorsports Development with the goal of creating a common set of rules that could be adopted by different racing series or sanctioning organizations. Over the past year, CTCC worked with the Sports Car Club of America and Grand-Am to solidify a set of rules that would respect both the B-Spec concept and goals of the different series. B-Spec is designed to be an entry level and affordable category and highlights one of the fastest-growing segments of the automobile business. Both Honda and Mazda revealed their new prototypes in December 2010. Since then, the Honda Fit and Mazda 2 have been joined by the Ford Fiesta and Fiat 500 at various test sessions. Other eligible cars include the Chevrolet Sonic, Kia Rio, Mini Cooper, Nissan Versa and Toyota Yaris.

Like its Super and Touring Classes, the new B-Spec Class will have its own set of requirements and will feature showroom stock racing cars utilizing stock engines and chassis, fitted with a competition roll cage, racing seat and other safety equipment along with the approved Continental ExtremeContact race tires and Sunoco race fuel. Weight equalization will be used to balance performance among competing manufacturers.

The entry-level B-Spec Class introduces a compact car category with stock engine and strictly controlled modifications.

Following the 2014 CTCC season, in which there were 4 full time cars at the start of the year, the series decided to drop the class for 2015. Replacing the class for that year would be the return of the GT class.