A few tax moves only work if they happen before the year ends. Here is a short checklist for 2026. Most of these deadlines fall on December 31, and one important one does not.
Charitable donations. Donations must be made by December 31, 2026 to count on your 2026 return, so keep the official receipts. Donating publicly traded shares that have gone up in value can be better than donating cash. The gain on the shares is not taxed, and you still get a receipt for the full value.
Tax loss selling. If you hold investments in a regular, non-registered account that are worth less than you paid for them, selling them creates a capital loss. That loss can offset capital gains from 2026 or from the three previous years. Trades settle one business day after they are placed, so Wednesday, December 30 is the last day to sell and have it count for 2026. Do not buy the same investment back within 30 days before or after the sale. That includes a purchase by your spouse, or a purchase inside your RRSP or TFSA. The loss can be denied under the superficial loss rule.
RESP contributions. Contributions to a child’s RESP by December 31 earn this year’s Canada Education Savings Grant. The grant adds 20 percent on the first $2,500 contributed per child, up to $500 a year. If you missed earlier years, you can catch up, but only one year at a time.
First Home Savings Account. If you plan to buy a first home and have not opened a First Home Savings Account, open one before December 31. Your $8,000 of annual room only starts once the account is open, and up to $8,000 of unused room carries forward. Contributions are deductible, and a qualifying withdrawal to buy a first home is tax free.
Tax instalments. If you pay your tax by instalments, the last quarterly payment for 2026 is due Tuesday, December 15. Paying on time avoids instalment interest, which CRA charges daily and which you cannot deduct.
RRSP contributions. This deadline is not December 31. Contributions made up to Monday, March 1, 2027 can still be deducted on your 2026 return. Check your notice of assessment or CRA My Account for your exact contribution room before you contribute.
TFSA room. There is no TFSA deadline. If you took money out of your TFSA in 2026, that room comes back on January 1, 2027, and new annual room is added the same day. Check your total room in CRA My Account before you top up, because the CRA figure can lag behind your recent transactions.
None of this needs to wait for tax season. A short review in December is usually cheaper than a missed deadline in April. If any of these apply to you and you are not sure how, get advice before the deadline passes.