In 2026, the policy for Bay Area Rapid Transit (BART) remains strict: two people cannot use the same Clipper card for a single journey. Each rider is required to have their own individual Clipper card or mobile device with a digital card. This is because the system relies on a "tag-on" and "tag-off" process to calculate distance-based fares; if you were to tag a second person in, the system would fail to track two separate exit points for one card. While some other transit systems allow "pass-backs" or multi-rider tags, BART requires separate accounts to ensure accurate billing and entry/exit data. For families or groups traveling together, each person—including children over a certain age—must carry their own physical card or use their own smartphone via Apple Wallet or Google Wallet to pay their fare at the gate.