How MapleTally calculators work
Plain notes on how the free calculators on this site are built, and how the figures are checked. Canada only.
How we check figures
Every week we check each tax rate, threshold and dollar figure on the site against official sources: canada.ca and Canada Revenue Agency pages, Finance Canada, and provincial government pages.
Each figure is marked supported, partly supported, or unverified.
Unverified figures are removed or clearly labelled "pending confirmation" on the page until an official source confirms them.
Each page shows the date it was last checked. Last full check: .
These pages are estimates only, not tax advice. MapleTally is independent and not affiliated with or endorsed by the CRA or any government.