Most agencies get stuck in a rut where retainers cap your margins at 30...

https://technivorz.com/four-dots-how-a-novi-sad-agency-cracked-the-code-on-product-evolution/

Most agencies get stuck in a rut where retainers cap your margins at 30 percent. By turning internal workflows into software, you can push those margins past 70 percent. Think of your agency as a lab for building products rather than selling hours.