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Adjusted Cost Base

Understand adjusted cost base in Canadian real estate - how to calculate it, what it includes, and why it’s essential for minimizing capital gains tax.

Adjusted Cost Base

June 06, 2025


What is Adjusted Cost Base?

Adjusted cost base (ACB) is the total amount paid to acquire a property, adjusted for expenses and improvements, used to calculate capital gains when the asset is sold.

Why Adjusted Cost Base Matter in Real Estate

In Canadian real estate, ACB determines the taxable capital gain on a property sale. It includes the original purchase price plus certain legal fees, renovation costs, and other eligible expenses.



Adjustments to the cost base may include:
  • Purchase price
  • Legal and appraisal fees
  • Property improvements (e.g., additions, capital renovations)
  • Selling expenses (e.g., commissions)



Accurately calculating ACB helps reduce tax liability and ensures compliance with Canada Revenue Agency (CRA) rules.



Understanding ACB is critical for investors, landlords, and homeowners selling secondary properties or rental units.

Example of Adjusted Cost Base in Action

After selling a rental property, the owner calculates the adjusted cost base by adding $20,000 in renovation costs and $5,000 in legal fees to the original purchase price.

Key Takeaways

  • Determines capital gains on property sale
  • Includes purchase price and improvements
  • CRA requires accurate tracking
  • Affects investor and rental property taxes
  • Reduces taxable profit when properly calculated

Related Terms

Additional Terms

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Mortgagee in Possession

A mortgagee in possession is a lender who takes control of a property after borrower default, but before foreclosure or power of sale. The lender. more

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A lease surrender agreement is a negotiated contract between a landlord and tenant that ends a lease before its scheduled expiration. Terms may. more

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