We almost always use flat rates, precisely because we don't want businesses to hold off on calling us for help.
For a one-person enterprise, a retailer, artisan, self-employed worker or freelancer, we charge $699 plus tax. For a 2-to-10 employee business, we charge $1,249 plus tax. For a business with 11 to 300 employees, the cost will vary according to the specifics of the business. We will ask them a few questions in order to come up with a customized flat rate. For those businesses, our rates vary from $3,000 to $15,000. A 300-employee business that is complex and has a lot of systems might be charged up to $15,000. That said, over the past four years, we have never charged anyone that much.