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.
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
Average and median describe different aspects of the same month’s transactions. Both are affected by the mix of homes sold.
Category averages compare different homes and locations; the gaps are not estimates of the cost to upgrade an otherwise identical property.
The five categories shown account for 5,000 of the board’s 5,057 sales. The remaining 57 transactions were in other housing categories.
Monthly observations are not seasonally adjusted. Active listings count properties available at month-end; they are not construction inventory.
Average and median prices share one dollar axis. These unadjusted transaction measures do not control for changes in the homes sold.
TRREB’s 416/905 categories compare the apartments sold in each area. The difference does not isolate a location premium for equivalent units.
5680 Oak Street in Vancouver and its surrounding context. (MCMP Architects)
Ground-level renderings of the tower proposed for 5680 Oak Street in Vancouver. (MCMP Architects)
