Retainers usually cap your margins at 30% because you’re trapped selling hours....

https://smart-wiki.win/index.php/Product_Updates_That_Actually_Increase_Value_(And_Why_Your_Agency_Isn%E2%80%99t_Shipping_Them)

Retainers usually cap your margins at 30% because you’re trapped selling hours. When you turn your agency into a lab and build your own tools, you can hit 70%+ software margins. Stop grinding for service fees and start building something that scales.