Do I need tax instalments?

Check the current year and two previous years, with an “unknown” option.

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Use net tax owing under CRA’s instalment rules, not gross business revenue or a tax-reserve estimate. Check the instalment reminder and official definition.

The current year and at least one of the previous two years must each be above the applicable threshold. Farmers/fishers use special rules. A result does not calculate the amount of an instalment.