What is the cost of compliance for mid-sized platforms?

 Costs vary by risk, features, and geography.

For a mid-sized platform active in the EU and UK, the main cost drivers are:
People and process building Trust and Safety, policy, and legal functions.
Engineering to add notice and action, appeals, logging, and dashboards.
Reporting and audits for DSA transparency and UK OSA evidence packs.
Marketplace extras like seller KYC and random checks if relevant.
External services such as age assurance, sanctions screening, and legal counsel.
The UK OSA adds potential penalties up to 10 percent of global revenue, which increases the business case for investing in compliance early. Exact figures depend on scale and architecture, but staged rollouts through 2025 let teams phase spend alongside Ofcom’s milestones.