Booking.com has been identified as a gatekeeper under the European Union's Digital Markets Act (DMA), which introduces new regulations and penalties for noncompliance. It now has six months to comply with the majority of the requirements outlined in the DMA.

Booking.com’s status as a gateway between businesses and customers is now considered significant, reaching the threshold of 45 million monthly active users and over 10,000 yearly active business users. There are specific obligations Booking.com must meet such as rules against self-preference, terms for business users, and notifying the EU of intended acquisitions. Non-compliance can lead to significant fines of up to 10% (or 20% for repeat offenders) of their annual revenue.

This designation places Booking.com alongside seven other tech companies—Alphabet, Amazon, Apple, ByteDance, Meta, and Microsoft—already classified as gatekeepers.