Substantial performance is a defined legal threshold, not a general impression that a job is mostly finished — reaching it is what starts several of a province’s statutory clocks running.
In Ontario, reaching substantial performance triggers real consequences rather than just describing progress. Treadstone Law’s own explainer lists them: the start of the basic statutory holdback release process and “a formal notice of substantial performance — a step used to confirm and publicize the date” that then anchors the countdown toward lien preservation and perfection deadlines — the 60-day and 90-day windows covered in preserving a lien vs perfecting one.
It also flips which holdback pool new work falls into. Work certified before the substantial performance date sits in the basic 10% holdback; work certified after it becomes finishing holdback, tracked and released separately — the split explained in finishing holdback vs basic holdback.
Provinces don’t share a common test for reaching it. Alberta’s Prompt Payment and Construction Lien Act gives it an arithmetic formula — work is deemed substantially performed once remaining deficiencies fall under a sliding percentage of the contract price (s.33(4)); the certificate of substantial performance entry walks through the dollar math on a real contract. Ontario publishes no equivalent percentage test in any regulator or statute source available here — so a contractor working in both provinces shouldn’t assume Ontario applies Alberta’s tiers, or any fixed percentage at all. The standard-form contracts track the same milestone under their own label: CCDC 2’s stipulated-price contract sets out the prerequisites for Ready-for-Takeover that a project must clear before the owner takes it over — see commissioning vs turnover.
An Ontario office fit-out is ready for the tenant to occupy and use for its intended purpose, though a few deficiencies remain — a door closer to install, some touch-up paint. The consultant issues and publishes a certificate confirming that date. That single date does three things at once: it starts the 60-day lien-preservation clock for every trade that worked on the job, it starts the basic holdback release process running, and it reclassifies every dollar of work certified from that day forward into the separate finishing-holdback pool rather than the basic one — three statutory consequences from one publication date, none of which required the job to be fully finished.
See also: The certificate of substantial performance · Finishing holdback vs basic holdback · Statutory holdback, explained.
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