Canada’s Big Tax Bet: Canadian PM Carney Unveils “Mega Deduction”

Canada is making a major change to its business tax system as Prime Minister Mark Carney’s government moves to lower investment costs and attract more private capital. PM Carney unveiled the Productivity Mega Deduction on Sept. 15 at the first Canada Investment Summit in Toronto. The permanent tax measure would allow businesses to immediately expense a much broader range of qualifying capital investments, giving companies a faster tax deduction when assets become available for use.

The move is part of Ottawa’s wider push to attract more than C$1 trillion in investment, particularly in mining, energy, technology and infrastructure, as Canada seeks to strengthen its economy amid trade tensions with the United States.

Canada Broadens Immediate Expensing Under New Mega Deduction

The Productivity Mega Deduction would expand permanent immediate expensing to about two-thirds of investment in capital assets, compared with roughly 15% covered by the earlier Productivity Super-Deduction. The measure is proposed for most eligible depreciable property acquired on or after Sept. 15, 2026.

Carney Pairs Tax Break With C$1 Trillion Investment Drive

The mega deduction is one piece of a broader Canada investment strategy unveiled at the Toronto summit. Ottawa says lower investment costs and greater tax certainty are intended to encourage businesses to expand productive capacity, invest in technology and modernize capital equipment.

The government is also seeking private, long-term investment in the operation of Canada’s four largest airports : Toronto, Montreal, Vancouver and Calgary ; while retaining public ownership of the underlying assets. Reuters reported interest from infrastructure investors, while labour groups have raised concerns about the potential impact on travellers.

Support and Criticism

The Ontario Chamber of Commerce welcomed the Productivity Mega Deduction, saying permanent immediate deductions and broader eligibility could lower the cost of investing in equipment, technology and other productivity-enhancing assets. The group also called for a simpler, more coordinated tax system. Business organizations have generally welcomed the tax changes, arguing that faster write-offs could improve the economics of major Canadian projects and make the country more competitive for investment.

The policy has also drawn criticism over the potential public cost of tax incentives and questions about which industries will ultimately benefit. The broader investment strategy has faced opposition as well. Hundreds of protesters gathered in Toronto during the summit, with labour, environmental, migrant-rights and social-justice groups criticizing elements of Ottawa’s plans, including fossil-fuel projects and private investment in public assets.

Canada’s Tax Break Now Faces the Investment Test

The central question is whether the Canada business investment tax break will lead companies to commit more capital. Immediate expensing can lower the after-tax cost of qualifying investments, but it does not guarantee that businesses will build new facilities, expand operations or invest in Canada.

Ottawa is betting that permanent tax relief, faster investment decisions and a broader investment push can strengthen Canadian productivity and economic capacity. The government’s projections are substantial, but the actual effect of the Productivity Mega Deduction 2026 will depend on how businesses respond and how much new investment follows.

Web resources on Canada’s Mega Deduction

1. Canada.ca : Government of Canada introduces new Productivity Mega Deduction to boost Canada’s advantage.
2. Reuters : Canada offers permanent tax incentive on capital investment as Carney lures investors.
3. OCC.ca : Ontario Chamber Welcomes Productivity Mega Deduction as a Major Step to Unlock Investment.
4. Reuters : Hundreds march in Toronto against Carney’s investment summit.