myCostBase keeps a CRA-ready adjusted cost base ledger across all your taxable accounts, pooled across brokerages and adjusted for USD trades, ETF distributions, and T5008 reconciliation.
T5008 difference explained: Broker used account-local ACB. myCostBase used pooled ACB across WS + QT accounts, adjusted for ROC.
Start free with unlimited manual entry — no credit card required. Need broker CSV imports or T5008 reconciliation reports? Upgrade to Household at $79 CAD/year. View pricing →
Brokers report what they see. They cannot see your other brokerage accounts, your ETF tax slips, or the cost basis that traveled with a transfer. Each gap is yours to manage — and myCostBase closes it.
T5008 Box 20 reports broker cost or book value, not necessarily your legal ACB. That internal figure can be incomplete for tax purposes — and brokers say so in the fine print.
myCostBase: Reconciles your ledger ACB against T5008 figures by security, explains the difference, and exports a disposition summary you can defend.
Hold the same ETF at Questrade and Wealthsimple? Canadian tax law requires one pooled ACB across both. Neither broker can calculate that for you.
myCostBase: Pools identical-property holdings across every taxable account for the same tax owner — automatically, as CRA requires.
Return of capital from your T3 reduces your ACB every year it goes unrecorded. By the time you sell, the taxable gain is larger than expected — and the explanation is buried in old tax slips.
myCostBase: Records every ROC adjustment, DRIP reinvestment, and reinvested gain as a dated ledger event — so the year-end ACB is never a surprise.
Foreign-currency positions must be converted to CAD using the rate on the specific transaction date. A flat annual average rate is not what CRA expects.
myCostBase: Fetches Bank of Canada daily rates per transaction, shows the rate source inline, and supports documented overrides that stay in the audit trail.
Every security has a running ledger showing share count, total ACB, and ACB per share after each event. When a number moves, the explanation sits next to the row that caused it — so you can defend the calculation, not just report the result.
Date, brokerage account, quantity, commission, currency, and the source row that produced it.
Shares and ACB before and after, realized gain or loss, and the specific rule applied to reach the number.
Manual adjustments, Bank of Canada FX overrides, and warnings stay attached to the ledger for later accountant review.
myCostBase is built for non-registered taxable accounts where ACB tracking actually gets complicated: the same ETF at two brokerages, USD positions that need daily FX conversion, ETF distributions that change your cost base annually, and transfers that carry original cost forward across institutions.
Explore all features →myCostBase follows the rules Canadian tax law actually requires — not a simplified approximation of them.
ACB pooling, return-of-capital adjustments, and USD FX conversion are applied according to the rules CRA actually uses — not the account-local book value method brokers default to. The methodology is documented and inspectable, so you can verify what the system is doing, not just trust the output.
✓ Documented methodology, not a proprietary black box
Capital gains summaries, disposition detail, and ACB audit trails are formatted for the moment your accountant asks for backup. The ledger produces the exact inputs filing software like TurboTax or UFile expects — so nothing needs to be reconstructed under deadline when T5008 season arrives.
✓ Export-ready before tax season, not after it
myCostBase is a ledger, not a filing tool. It produces the correct ACB and capital gains summary your accountant needs — and exports the detail required by software like TurboTax or UFile.
✓ Export-ready for filing season
Add accounts from any Canadian brokerage. Import CSV trade history, enter transactions manually, or mix both. Your data is not tied to a single institution's export format or book value assumptions.
✓ Any brokerage, any account structure
Reconstructing years of trades, distributions, and FX conversions after the fact is harder than tracking them as they happen. Manual entry is always free. Upgrade to Household at $79 CAD/year when you need broker CSV imports, T5008 reconciliation reports, and support for up to 5 tax owners.
All prices in Canadian dollars. No credit card required.
Practical guides on adjusted cost base, T5008 reconciliation, and Canadian tax calculations for investors in taxable accounts.
The Bank of Canada daily closing rate is the standard reference for converting USD trades to CAD for Canadian tax purposes. Here is how to find the right rate, handle non-business days, and avoid the most common conversion errors.
Read →T5008 Box 20 is the cost or book value your broker recorded. Box 21 is proceeds of disposition. Neither field is the same as your legal adjusted cost base — here is how to read the slip correctly.
Read →How to track adjusted cost base in a spreadsheet, what columns you need, where Excel and Google Sheets fall short, and when Canadian investors should switch to dedicated ACB software.
Read →Answers to the questions Canadian investors ask most about ACB, T5008, and what their broker does and doesn't calculate for them.
Free plan includes unlimited manual entry.