5 Perks You Didn't Realize Come With T-Mobile At Costco
By Sarah Chaney
Published on March 29, 2026.
Costco, a warehouse club retailer, offers discounts on toiletries, clothing, and electronics, including TVs, laptops, and smartphones. Members can also receive $75 when they activate a new T-Mobile line at Costco, in the form of a Costco Digital Shop Card. This perk can trigger when you purchase a new device with a finance agreement at Costco via T-Mo. The retailer also offers free phones during upgrades and sometimes makes money through these discounts. Other perks include discounted fuel, free samples, vehicle-related benefits, deals on travel, and more. For smartphones, switching to T-mobile at Costco can yield significant savings, with an eligible phone on a 36-month 0% APR installment plan. Additionally, members can earn up to $200 back, split into $100 in bill credits and a $100 Costco Virtual Shop Card, split among the 36 monthly payments.
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