Share on LinkedInShare on LinkedIn

ARTICLE · 09 MARCH 2026

Ontario Construction Act Amendments Now In Effect

Osler, Hoskin & Harcourt LLP
Explore more from Osler, Hoskin & Harcourt LLP

On January 1, 2026, amendments to Ontario's Construction Act came into effect, addressing prompt payment, adjudication and holdback payment.

CanadaReal Estate and Construction
Lia Bruschetta
Lia Bruschetta
Roger Gillott
Roger Gillott
Paul Ivanoff
Paul Ivanoff
Elliot Smith
Elliot Smith
Andrew Wong
Andrew Wong
Tian Gao
Tian Gao
Cole Tavener
Cole Tavener
Author LinkedIn connections

Key takeaways

  •  On January 1, 2026, amendments to Ontario’s Construction Act came into effect, addressing prompt payment, adjudication and holdback payment.
  • The amendments improve the prompt payment scheme by redefining “proper invoice” and allowing private adjudicators alongside the previous roster system.
  • The amendments align with recommendations from an independent review and leave room for future discussions regarding further industry input.

On January 1, 2026, several amendments to Ontario’s Construction Act (the Act) came into force pursuant to Bill 216, the Building Ontario For You Act  (Budget Measures)  and Bill 60, the Fighting Delays, Building Faster Act, 2025. As we discussed in our Amendments to Ontario’s Construction Act webinar, the amendments to the Act most notably include modifications to the provisions on prompt payment, adjudication and the payment of holdback, including transitional measures built into section 87.4 of the Act.

We operate a free-to-view policy, asking only that you register in order to read all of our content. Please login or register to view the rest of this article.

Register for freeORLog in

The content of this article is intended to provide a general guide to the subject matter. Specialist advice should be sought about your specific circumstances.

The content of this article is intended to provide a general guide to the subject matter. Specialist advice should be sought about your specific circumstances.

View source

Related Articles

Legal Intelligence Newsletters: sign up for the latest legal and regulatory news on your chosen topics

Read more about

Related Comparative Guides

See more popular content from

Article

Could The Old Ontario Construction Lien Act Still Apply To Your Project? The Court Of Appeal Weighs In

A 2026 Ontario Court of Appeal decision reveals that construction contracts signed years after legislative reforms may still be governed by the old Construction Lien Act if the procurement process began before July 1, 2018. The ruling demonstrates how early project proposals and negotiations can determine which statutory regime applies, regardless of when the final contract was executed or where the project was ultimately built.
CanadaReal Estate and Construction
Miller Thomson
Miller Thomson
Article

Here’s The Drill: Introducing The New CCDC 32 – 2026 Progressive Design-Build Contract

CCDC 32 introduces a progressive design-build framework that allows owners and design-builders to collaboratively develop project scope, budget, and schedule before committing to a final price. Through a two-phase structure with project gates and off-ramp provisions, this standardized contract addresses complex construction projects where requirements cannot be fully defined at the outset. How does this collaborative approach balance flexibility with cost certainty while reshaping traditional roles in const
CanadaReal Estate and Construction
WeirFoulds LLP
WeirFoulds LLP
Article

The Trade War Tit-for-tat Continues: United States Responds To Canada’s Retaliatory Surtaxes With New Tariffs And Import Prohibitions

Canada and the United States have escalated their trade war with new retaliatory tariffs and import prohibitions taking effect in September 2026. What specific goods are now subject to these measures, and how do the complex layers of tariffs interact to impact cross-border commerce? This comprehensive analysis breaks down the latest developments in the deteriorating Canada-U.S. economic relationship.
CanadaInternational Law
Osler, Hoskin & Harcourt LLP
Osler, Hoskin & Harcourt LLP
Article

Elbows Back Up: U.S. Section 338 Tariffs, Canada’s Retaliatory Surtaxes And The Current Tariff Landscape

As Canada and the United States escalate their trade dispute with new retaliatory tariffs, businesses face mounting compliance challenges across multiple sectors. This analysis examines the comprehensive tariff landscape affecting bilateral trade, including Canada's September 8, 2026 surtaxes on U.S. imports and the corresponding American section 338 tariffs, detailing rates, exemptions, and the legal frameworks governing these measures.
CanadaInternational Law
Osler, Hoskin & Harcourt LLP
Osler, Hoskin & Harcourt LLP
Article

Canadian Prime Minister Announces ‘Productivity Mega Deduction’

Canada's new Productivity Mega Deduction permanently provides immediate expensing for a wide range of depreciable property and Canadian development expenses, dramatically expanding the scope beyond the previously announced Productivity Super Deduction. The measure aims to reduce Canada's marginal effective tax rate on new business investment to 6.4%, positioning it as the lowest among major economies and less than half the U.S. rate.
CanadaTax
Osler, Hoskin & Harcourt LLP
Osler, Hoskin & Harcourt LLP
Article

OSC Releases Crypto Asset Survey Results

The Ontario Securities Commission's 2026 survey reveals significant shifts in Canadian cryptocurrency adoption, awareness, and sentiment. With ownership rates more than doubling since 2023 and a growing belief that crypto will play a key role in Canada's financial system, the findings paint a picture of an evolving landscape where traditional financial advisors increasingly recommend crypto investments, yet regulatory awareness remains surprisingly low among the general population.
CanadaFinance and Banking
Osler, Hoskin & Harcourt LLP
Osler, Hoskin & Harcourt LLP