Tier Credits earned during a Tier Period determines a member’s Tier Level. At the end of each Tier Period, credits revert to 0 but you will maintain the Tier Level earned. Great Canadian Rewards has two (2) Tier Periods: Tier Period 1: April 1 – September 30. Tier Period 2: October 1 – March 31. Tier Level: Club→ 0 – 499 Tier Credits Required* Preferred→ 500 – 2,499 Tier Credits Required* Premium→ 2,500 – 14,999 Tier Credits Required* Summit→ 15,000+ Tier Credits Required* *Beginning October 1, 2022.