I always have the doubt about how to charge clients. I offer internet marketing services (SEO services mainly) to small and medium business that make at least 1 million € in sales over a year.
The average client of these types of business pays them around 10.000€ per year.
So the question is...is it fair to charge them based on the amount of money they can make with one client or it would be better to charge them based on my hourly rate.
I mean, if they make 10.000€ (not revenue of course) with one client and I help them get 2 more clients per month, should my services be worth based on how much could they make or based on my normal rate per hour?