T-Mobile removes line cap on Costco member perk

T-Mobile removed a limit on how many lines can receive its Costco member discount, according to updated language on both companies’ membership benefit pages. The change, reflected in website terms this week, took effect immediately.

Earlier versions of the benefit pages specified a per-membership cap on the number of lines eligible for the discount. The current text no longer includes that limit, opening the possibility for Costco members to apply the perk to additional — and potentially all — eligible lines on a T-Mobile account.

The update appears on T-Mobile’s and Costco’s online benefit descriptions. No formal press statement accompanied the change, and customer service representatives for both companies did not provide new public comment when contacted about the revision.

Costco’s member perk with T-Mobile has offered discounted pricing and promotional incentives to members who enroll in T-Mobile plans through Costco stores and the retailer’s channels. The program has been described in in-club materials and on benefit pages for several years, with terms that previously capped the number of qualifying lines per membership.

Under the revised terms, families and households that add or move multiple lines to T-Mobile may be able to extend the Costco discount to more lines without needing a separate membership or account workaround. Actual savings will vary by the specific plan chosen, ongoing promotions and how T-Mobile applies the discount at signup or on billing statements.

No timeline or detailed rationale for the change was provided beyond the updated web terms. Members who want to confirm eligibility for multiple lines should review the current benefit language on T-Mobile’s and Costco’s websites or contact member services for account-specific information.