SEO retainers usually cap your profit margins at 30 percent no matter how well...

https://www.booknose.win/relying-solely-on-client-retainers-keeps-your-margins-stuck-at-30-percent-if

SEO retainers usually cap your profit margins at 30 percent no matter how well you scale. Try treating your agency like a lab to productize your internal workflows. Shifting to software is the easiest way to push those margins past 70 percent.