Agency retainers rarely net more than 30 percent profit because they rely on...

https://iris-wiki.win/index.php/What_is_an_Integrated_Link_Prospecting_Stack_and_Why_Build_Your_Own

Agency retainers rarely net more than 30 percent profit because they rely on constant headcount. If you turn your best internal workflows into a tool, you can flip those margins to 70 percent. Start treating your agency like a lab for software.