Most SEO agencies are stuck at 30% margins because they only sell billable...

https://www.bookmarking-keys.win/seo-retainers-usually-cap-out-at-30-margins-but-turning-your-internal-scripts

Most SEO agencies are stuck at 30% margins because they only sell billable hours. Start treating your agency as a lab to build your own software. Once you transition to product margins, you’ll easily hit 70% and stop trading time for revenue.