Adjusted Cost Base Tracker
Track the adjusted cost base of a holding you bought in pieces.
Why this is worth checking
Adjusted cost base is what you actually paid, averaged across every purchase, including commissions and any reinvested dividends. Get it wrong and every capital gain you report afterwards is wrong.
Canada requires averaging across all identical shares you hold, not the first-in-first-out method used elsewhere. Buying the same stock in five purchases gives you one blended cost base, not five lots.
How this calculator works
Add each buy and sell in order. The tracker maintains the running average cost, adjusts for reinvested distributions, and reduces the base proportionally on a partial sale.
Return of capital distributions, common in REITs, reduce your cost base and are not handled automatically. Check the T3 or the issuer’s tax breakdown for those.
Related
- Then calculate the tax
- REITs and return of capital
- How an adjusted cost base is calculated and tracked
This calculator is for general information, not tax or financial advice. Rates and limits change. Verify anything that matters against the CRA or a qualified professional before acting on it.