Free Tool
Ontario corporate tax estimator
A rough estimate for a Canadian-controlled private corporation, using combined federal and Ontario rates.
First $500,000 at 12.2%
$18,300
Above that at 26.5%
$0
Estimated total (12.2% effective)
$18,300
Assumes the full small business limit is available. Associated corporations share the limit, and it shrinks with high passive investment income or large taxable capital. See Ontario corporate tax rate guide.