The Evolution of Immediate Expensing: A History of Corporate Depreciation in Canada

For Canadian business owners, purchasing heavy machinery, upgrading computer networks, or expanding a commercial fleet has always involved a complex calculation: How fast can we write this off?

 

Unlike regular operating expenses (like payroll or office supplies), the Canada Revenue Agency (CRA) does not traditionally allow you to deduct the full cost of a major capital asset in the year you buy it.  Instead, you are required to claim depreciation over time using the Capital Cost Allowance (CCA) system.

 

Over the last decade, however, the federal government has constantly tweaked, accelerated, and entirely rewritten the CCA rules to stimulate the economy and keep Canada globally competitive.  From the original “half-year rule” to the introduction of massive $1.5 million write-offs – and most recently, the 2026 Productivity Mega Deduction – the rules governing how you deduct equipment are constantly shifting.

 

Whether you are a CPA looking for a technical timeline, or a business owner trying to understand your current tax strategy, here is the complete history of Canada’s shifting depreciation rules.

The Baseline: The Traditional “Half-Year Rule”

To understand the changes, you have to understand the baseline.  Historically, the CRA required businesses to pool their assets into specific “Classes”, each with its own set depreciation rate.  For example, standard office furniture (Class 8) depreciates at 20% per year, while computer hardware (Class 50) depreciates at 55%.

 

The Half-Year Rule dictated that in the first year you purchased an asset, you could only claim half of the normal depreciation rate.  If you bought $100,000 of office furniture that depreciates at a 20% rate, you couldn’t claim $20,000 in year one.  You were restricted to half that amount – just $10,000.

 

For decades, this was the law of the land, forcing businesses to wait years to fully expense their operational upgrades.

Era 1: The Accelerated Investment Incentive (November 2018)

In late 2018, in response to massive corporate tax cuts in the United States, Canada needed a way to incentivize domestic investment.  On November 20, 2018, the government introduced the Accelerated Investment Incentive (AIIP).

 

This was the first major modern shift in the CCA system, and it provided two massive benefits for most capital assets:

 

1. The Suspension of the Half-Year Rule – Businesses no longer had to cut their first-year deduction in half.

2. The 1.5x Multiplier – The CRA allowed businesses to multiply their net additions for the year by 1.5 before applying the CCA rate.

For most standard equipment, this effectively tripled the first-year tax deduction compared to the old rules.  For specific, highly prized assets – namely Manufacturing and Processing equipment (Class 53) and Clean Energy equipment (Classes 43.1 and 43.2) – the AIIP allowed for a full 100% immediate write-off in year one.

 

The AIIP was always designed to be temporary.  A phase-out period began in 2024, gradually reducing the enhanced first-year allowances until they are scheduled to expire completely by 2028.)

Era 2: Temporary Immediate Expensing (April 2021 – December 2023)

When the pandemic disrupted the global economy, the federal government realized that tripling the first-year deduction was no longer enough.  Businesses needed immediate cash flow.

 

In April 2021, the government introduced the Temporary Immediate Expensing Regime.  This was a blockbuster policy for Canadian-Controlled Private Corporations (CCPCs).

 

• Under this regime, a CCPC could instantly write off up to $1.5 million per year in eligible capital property.
• The rules were incredibly broad, covering almost all standard business equipment, vehicles, and technology (with the notable exception of long-lived assets like buildings and goodwill).

For a few highly profitable years, small businesses could wipe out massive tax liabilities by buying equipment before year-end.  However, this golden era had a strict deadline: the $1.5 million limit officially expired for CCPCs on December 31, 2023 (and a year later for individuals and partnerships).

Era 3: The 2026 Productivity Mega Deduction (September 2026)

Following the expiration of the $1.5 million limit, businesses were temporarily pushed back into the AIIP phase-out rules.  Capital purchases suddenly yielded much smaller upfront tax refunds.

 

That changed dramatically on September 15, 2026.  Recognizing a lag in national business investment, the government introduced the Productivity Mega Deduction.

 

This effectively brings immediate expensing back to the table – but this time on a permanent basis.  Under the new rules:

 

• Canadian businesses can immediate expense 100% of the full cost of most depreciable property acquired on or after September 15, 2026.
• While certain long-lived assets (like buildings) and specific vehicles remain excluded, the vast majority of technology, machinery, software, and operational equipment once again qualifies for a total year-one write-off.

How We Can Help

The history of Canada’s depreciation rules is a perfect example of why corporate tax planning cannot be put on autopilot.  Depending on the exact month and year you purchased a piece of equipment, it could be subject to the old half-year rule, the AIIP multiplier, the $1.5 million temporary limit, a transitional phase-out rate, or the new 100% Productivity Mega deduction.

 

Applying the wrong rule to a historical asset pool can trigger CRA audits, while failing to utilize the newest deductions leaves your operating cash on the table.

 

At NG Chartered Professional Accountants, we monitor the shifting landscape of Canadian tax law so you don’t have to.  We work alongside your management team to review your historical CCA schedules, ensure past purchases were deducted optimally, and strategically time your future acquisitions to leverage the massive new 2026 expensing rules.  If you are planning a capital expansion, let our team build the strategy that maximizes your return on investment.

 

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