The marginal effective tax rate on personal income has declined for most Canadians over the past decade, but has risen for many low-to-middle-income families with young children, which reduces their gains from earning more income, according to a report from the C.D. Howe Institute. In “What’s My METR? Marginal Effective Tax Rates Are Down – But Not for Everyone: The Ontario Case,” authors Alexandre Laurin and Finn Poschmann say Ontario is a case in point, with marginal effective tax rates over 50 percent for many low-to-middle-income families with children, and the share has risen in 2011 compared to 2000.
