What Happened?
On September 15, 2026, the Department of Finance released a backgrounder and companion draft legislative proposals introducing the "Productivity Mega Deduction". It builds directly on the "Productivity Super-Deduction" from Budget 2025, which provided immediate expensing on roughly 15 percent of capital asset investment — manufacturing and processing equipment, clean energy and conservation property, zero-emission vehicles, patents, data infrastructure, and computers. The new measure widens the net to roughly two-thirds of capital asset investment and makes immediate expensing permanent rather than temporary. Finance estimates the incremental fiscal cost at $36 billion over five years, starting in 2026–27.
How It Works
Immediate expensing lets a business deduct the full capital cost of "eligible property" in the year it becomes available for use, instead of claiming capital cost allowance over years on a declining-balance basis. It applies to property acquired on or after September 15, 2026 — "Announcement Day".
Excluded from the expanded measure: Class 1 and Class 3 buildings (with a partial carve-out for LNG-related buildings and continued temporary treatment for manufacturing buildings under the existing Budget 2025 rules), Class 14 and 14.1 property (franchises, licences, goodwill), Class 51 (regulated natural gas pipelines), certain Class 10 and 10.1 vehicles, and property under Schedule V and VI. Canadian development expenses, as mentioned further below, incurred on or after Announcement Day also qualify. Anything that doesn't qualify falls back to the existing temporary Accelerated Investment Incentive.
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