For self-directed investors, tax season is more than an administrative exercise; it’s a functional component of long-term portfolio management. When managing your own investments, you are generally responsible for tracking your Adjusted Cost Base, reconciling tax slips, and attempting to ensure compliance with Canada Revenue Agency (CRA) reporting rules.
With the April 30 deadline approaching, here is a summary of items to review for the 2025 tax year.
1. Identify Notable Deadlines
The following dates are key deadlines that investors need to know:
- April 30, 2026 – General deadline to file a tax return and pay any balance owing.
- June 15, 2026 – Filing deadline for self-employed individuals (however, interest on any taxes owed typically begins accruing after April 30).
Missing the payment deadline may trigger interest charges that compound daily, which can erode investment returns and should be avoided where possible.
2. Gather and Reconcile Tax Slips
Brokerages typically issue tax slips by early April. Investors should reconcile these with their own records to ensure accuracy.
Common slips include a:
- T3 – Trust income (ETFs, REITs, income trusts)
- T5 – Dividend and interest income
- T5008 – Securities transactions
- T4RSP / T4RIF – RRSP or RRIF withdrawals
Note: The T5008 records dispositions but does not always reflect an accurate Adjusted Cost Base (ACB). Investors should verify these amounts using their own transaction history.
3. Review Your Adjusted Cost Base (ACB)
Accurate ACB tracking aims to prevent overpayment of tax. Brokerage “Book Value” figures frequently may exclude:
- Return of Capital (ROC) adjustments
- Reinvested capital gains distributions (phantom distributions)
- Corporate actions, such as splits and consolidations
If ACB is not tracked properly, investors risk paying tax twice on reinvested distributions. For the 2025 tax year, the capital gains inclusion rate for individuals remains 50%. While tax rules can change, accurate record-keeping is a good strategy to avoid reassessment.
4. Evaluate Form T1135 Requirements
Foreign property reporting is often overlooked. If you held Specified Foreign Property in a non-registered account — including U.S.-listed stocks — and the total cost exceeded $100,000 CAD at any point in 2025, you must generally file Form T1135.
Reminder: The threshold is based on cost, not market value.
5. Review Capital Losses
Unused Net Capital Losses from prior years can be applied against 2025 capital gains. In volatile markets, these carry-forwards may meaningfully reduce tax liability.
Investors should also watch for the superficial loss rule, which disallows a loss if the same security is repurchased within 30 days of its sale.
6. Review Potential Deductions
Fees paid to manage non-registered accounts may be deductible. Trading commissions, however, should be added to your ACB rather than deducted. Interest on funds borrowed to purchase income-producing investments is generally deductible if there is a reasonable expectation of earning income.
7. New Alternative Minimum Tax (AMT) Rules
Starting in 2024 (and continuing into the 2025 tax year), the AMT regime underwent significant changes that tend to affect high-income investors. Key updates include:
- AMT rate increased to 20.5%
- Capital gains inclusion under AMT is 100% (vs. 50% under the regular system)
Investors who realized large capital gains or claimed significant deductions in 2025 — such as flow-through share deductions — may face higher taxes under AMT.
The new exemption threshold is $177,882. High-income investors should consider consulting a tax professional.
8. Trust Reporting & Bare Trusts Relief
Trust reporting rules have been evolving in recent years.
For the 2025 tax year, the CRA has extended administrative relief for bare trusts — arrangements where someone holds legal title for another person (for example, many “In Trust For” accounts).
Under current rules, many small trusts with assets under $50,000 (FMV) may be exempt from expanded reporting requirements if specific criteria are met.
9. Marginal Rate Adjustments
For the 2025 tax year, the federal government adjusted the lowest personal income tax bracket.
Income from $0 to $57,375 is effectively taxed at 14.5%. This change modestly reduces tax for lower-income earners but also affects the value of certain non-refundable tax credits.
Strategies that May Reduce Your Tax Burden
Taxes are unavoidable, but several strategies may help to reduce their impact on your portfolio.
RRSP Contributions
RRSP contributions provide a dollar-for-dollar deduction against taxable income. The deadline for such contributions in the 2025 tax year is typically in early March. Investors in higher tax brackets may benefit most from prioritizing RRSP contributions.
TFSA Growth
TFSA contributions are not tax-deductible, but all growth and withdrawals are tax-free, making the account highly efficient for long-term compounding.
FHSA Benefits
For eligible investors, the FHSA combines advantages of both RRSP contributions and TFSAs. FHSA contributions are tax-deductible (up to $8,000 annually) and qualified withdrawals for a home purchase are tax-free.
Income Splitting for Couples
Couples in different tax brackets may reduce their combined tax burden through income splitting. According to Qtrade, common strategies include:
- Spousal RRSP contributions, which shift retirement income to the lower-earning spouse.
- Pension income splitting, which allows up to 50% of eligible pension income (including many RRIF withdrawals after age 65) to be reported by a spouse.
Ultimately, staying organized can ideally help investors avoid or minimize unnecessary tax and preserve portfolio returns.