Turn a confirmed C$30,000 threshold crossing into the dates you need to review next. Compare the single-quarter rule with the completed four-quarter rule, then download a private calendar reminder.
For most businesses, CRA uses two ordinary small-supplier tests. The calculator does not decide whether registration applies; it organizes the dates after the facts and classification have been confirmed.
If one calendar quarter alone exceeds C$30,000, small-supplier status ends on the supply that crosses the threshold. The effective date is no later than that day, and CRA says registration is required within 29 days of the effective date.
If up to four completed quarters exceed C$30,000 but no single quarter does, status ends at the end of the month after the crossing quarter. The first later supply determines the candidate effective date.
This calculator is for the ordinary C$30,000 rules for most businesses. It does not cover charities, public institutions, public service bodies, listed financial institutions, taxi or ride-share operators, non-resident special regimes, voluntary registration, Québec sales tax, or fact-specific place-of-supply and export classification.
Useful for a Canadian freelancer approaching C$30,000? Share the public tool—not a personal result.