SEO retainers usually cap your margins at 30% because you’re just selling...

https://remote-wiki.win/index.php/The_Agency_Paradox:_Why_You_Should_Stop_Renting_Your_Future

SEO retainers usually cap your margins at 30% because you’re just selling hours. If you start treating your agency like a lab to build your own internal tools, you can flip that model and get your margins north of 70%.