Averages out to only $10.20 per month.
Note that you can purchase multiple Game Pass codes and apply them to your account up to a maximum of 36 months, however ...
Xbox Game Pass Membership as Low as $13 for Final Sale, Access 500+ Xbox, PC, and Console Games
Xbox Game Pass Ultimate Membership (1-month & 3-month) up to 35% off, including deals, discounts, EA Play membership, and ...