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How does Capital Cost Allowance work for business assets in Ontario?

TSL Written by the Treadstone Law team· Updated June 2026

Capital Cost Allowance (CCA) is the CRA's system for deducting the cost of capital assets (equipment, vehicles, computers, machinery, and similar items) over time instead of all at once. Rather than fully expensing an asset in the year of purchase, you claim a percentage of its undepreciated value each year, based on the CCA class assigned to that type of asset.

Different assets belong to different CCA classes, each with its own declining-balance rate. Common classes include computers (Class 50 at 55%), automobiles (Class 10 at 30%), and general machinery (Class 8 at 20%). Buildings fall into different classes depending on their age and use.

In the year of acquisition, a "half-year rule" normally limits your CCA claim to half the usual rate. However, an Accelerated Investment Incentive has allowed enhanced first-year deductions for many classes in recent years — federal rules on this should be confirmed with a tax professional for the current year. CCA is reported on the T2125 form for self-employed individuals, and claiming CCA is optional each year — you can carry it forward to a year with higher income.

Key takeaways

  • CCA spreads deductions for capital assets over time at class-specific rates.
  • A half-year rule limits deductions in the acquisition year for many classes.
  • CCA is optional — you can defer claiming it to a year when it provides more tax benefit.
  • Accelerated incentives may enhance first-year deductions; confirm current rules with a tax professional.
This is general information, not legal advice. It doesn’t create a lawyer–client relationship, and the rules can change. For advice on your situation, a Treadstone tax lawyer can help.
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