It depends on what services you are providing. Try looking at the market and see what your competitors/peers are charging for similar services that you want to

It depends on what services you are providing. Try looking at the market and see what your competitors/peers are charging for similar services that you want to sell, it's a good starting point. In theory you should try to charge as much as your clients are willing to pay for your service. That might be very different amount based on how valuable the service you provide is to them.