EU charges TikTok over algorithm 'rabbit holes,' flags possible 6% fine

The European Commission came for TikTok's algorithm on Friday, issuing preliminary findings that the platform's recommender system breaches the EU's online content rules. The charge centers on the so-called rabbit hole effect — the way a single scroll or like pulls users deeper into an endless stream of similar videos. For owner ByteDance, the stakes are steep: a fine next year of as much as 6% of its global annual turnover if the problem isn't resolved.

Regulators say TikTok failed to put proportionate, reasonable and effective measures in place to blunt the risks. Endless, repeated exposure to content about sadness, isolation or body image can be damaging to users' mental health, the Commission said. EU tech chief Henna Virkkunen framed it bluntly, saying each scroll or like feeds the algorithm more of the same and leads users down rabbit holes they cannot easily escape from. TikTok, she said, needs to step up its efforts to protect users' well-being, minors included.

The Commission laid out what it wants changed: a redesign of the 'For You' feed, more weight given to users' explicit preferences, user controls that are easier to find and use, and regular testing of the algorithm. The charges fall under the Digital Services Act, the EU rulebook that forces big online platforms to do more against harmful and illegal content.

This is not TikTok's first run-in with Brussels. Back in February, regulators charged the platform over what they called addictive design, inadequate protection of children, and obstacles that made it hard for researchers to request access to public data. TikTok fired back at the time, calling those preliminary findings categorically false and saying it would take steps to challenge them.

The pressure extends well beyond one app. Social media companies face growing scrutiny worldwide over concerns their platforms feed a mental health crisis among children, with some governments already imposing or weighing bans for underage users. The Commission is separately investigating rabbit hole effects tied to Meta Platforms' Facebook and Instagram recommendation systems.

TikTok now gets its chance to answer the charges. If the issues go unresolved, the fine — up to 6% of ByteDance's global annual turnover — would land next year.