This paper focuses on and provides guidance for the calculation of child support for very high income earners in Canada, and contains tips for how to succeed in negotiation and litigation. The paper includes a description of relevant legislation for child support, a history of the cases leading up to Francis v Baker, [1999] 3 SCR 250 [Francis], an analysis of Francis, and a history of major cases post-Francis, divided into themes. In addition, some suggestions and thoughts on how to advise clients regarding budgets and proposals for quantum are provided, and there is a discussion of data that relates to child support amounts awarded when incomes are in excess of $1,000,000 per year. Charts that list pertinent details from very high income child support cases are included as appendices.