All data analyzed for this story was found in the Canada Revenue Agency Final Statistics Report, for tax years 2011 to 2014 (most recent).

Reports include aggregated data on filers, such as their total income as assessed, the amount they paid in taxes, as well as a breakdown of taxable and non-taxable returns. CBC News combined all provincial reports (Table 2) and filtered out every column but the three top income classes starting at $100,000.

Amounts include federal and provincial/territorial tax.