Agencies often get stuck in a service loop where retainers cap margins at 30...

https://www.wall-bookmarkings.win/most-seo-agencies-plateau-at-30-percent-margins-because-service-work-is-hard-to

Agencies often get stuck in a service loop where retainers cap margins at 30 percent. Start treating your team like a lab to build software instead. Once you turn your internal workflows into a tool, those margins can jump to 70 percent plus.