Tier Credits are a measure of your progress toward your next Unity card status. They are earned based on your total gaming or non-gaming qualifying spend in a calendar year (January 1st through December 31st).
You earn 1 Tier Credit for every $1 spent in participating cafes and non-casino hotels, as well as on dining and retail outside of the cafe. Tier Credit earning rates will vary at each casino based on your game play. Your Tier Score will reset at the beginning of each year.