October is one of the most important months for Canadian tax planning in 2026. The clock is ticking toward year-end, and decisions you make now directly affect how much tax you'll owe in April 2027. The key moves include reviewing your investment portfolio for losses, maximizing RRSP and FHSA contributions, evaluating your marginal tax rate, and assessing any business or rental income adjustments. With just three months left, October is your ideal window to implement strategies that still count for the 2026 tax year. October gives you enough time to act without the holiday rush of November and December. Unlike December, when markets can be volatile and CRA offices are busier, October offers a calmer window for thoughtful tax planning. Financial institutions need time to process transactions before year-end, and many strategies require settled trades or deposit confirmations by December 31. If you're self-employed or run a small business, October is when you should finalize your income and expense records for the year. Rental property owners should also reconcile their income and deductions during this month. If your investments have declined in value, October is the time to consider selling underperforming securities.
No, October is actually ideal. You have enough time for financial institutions to process contributions by year-end, and you can make thoughtful decisions without the December rush. Earlier planning also means better options if you need to adjust your strategy.
Yes, any capital losses or gains from October sales count toward your 2026 tax year, provided the trades settle before December 31, 2026. Check with your broker about settlement dates to ensure your transaction closes in time.
RRSP contributions made in October 2026 reduce your taxable income for the 2026 tax year, and you'll claim the deduction when you file your 2026 return in 2027. You have until March 1, 2027 to contribute, but contributing earlier can help with cash flow planning.
You can still make moves in November and December, but your options become limited. Markets are busier, CRA staff is overwhelmed with year-end calls, and time to think through decisions shrinks. Acting now gives you better control and fewer regrets.
If you have a complex situation (self-employed, rental income, large investments, or significant life changes), speaking with a tax professional in October is worthwhile. They can identify opportunities you might miss and coordinate your strategy with your overall financial plan.