Retainers are a constant grind that usually caps your margins at 30%. Start...

https://www.golf-bookmarks.win/most-seo-agencies-get-stuck-at-30-margins-because-they-are-trapped-by-client

Retainers are a constant grind that usually caps your margins at 30%. Start treating your agency like a lab to turn your manual workflows into tools, and you can easily push those profit margins past 70%.