Service retainers usually cap your margins at 30 percent. Stop just selling...

https://bizzmarkblog.com/what-mistakes-do-agencies-make-when-they-try-to-ship-software/

Service retainers usually cap your margins at 30 percent. Stop just selling labor and treat your agency like a lab to build your own internal tools. That shift lets you build software products that hit 70 percent margins and beyond.