I am assuming that you would be paying international tuition. International tuition varies from school to school, although I'd say reliably there's a range of between 15-23k for SW. However, compared to the schools it appears that you are currently applying to in the US, Canadian schools would most likely be significantly less and you'd be paying tuition in CDN $. For example, where I am currently doing my MSW, Wilfrid Laurier University, the international tuition for SW is 22k a year CDN, so you're looking at around 15k USD.