Consulting fees for a Paid Media agency vary by scope and complexity: foundational audits and roadmaps start around €3,000, while full governance and quarterly challenge workshops range from €5,000–€15,000 per quarter. If you’re evaluating a PPC agency retainer, budgeting 10–20% of your quarterly ad spend is a common benchmark. Your final investment depends on campaign scale, desired frequency of workshops, and custom reporting needs.