Tax‑time mistakes in Canada
Missing the Canadian tax deadline triggers Canada Revenue Agency penalties, interest and can affect benefits if returns are late. Recent coverage also warns Canadians commonly misunderstand which expenses are deductible and that obvious filing errors often cost more than hunting rare write‑offs. ( )
Most Canadians must file their 2025 tax return and pay any tax owing by April 30, 2026, or the Canada Revenue Agency can start charging penalties and interest. (canada.ca) Self-employed Canadians get until June 15, 2026 to file, but any 2025 balance owing is still due April 30, 2026. The Canada Revenue Agency says filing late can also interrupt benefit and credit payments such as the Goods and Services Tax and Harmonized Sales Tax credit, the Canada Child Benefit and Old Age Security. (canada.ca) If you owe tax and file late, the basic late-filing penalty is 5% of the unpaid balance, plus 1% for each full month late, up to 12 months. If the Canada Revenue Agency penalized you for late filing in 2022, 2023 or 2024 after a demand to file, the repeat penalty rises to 10% plus 2% a month for up to 20 months. (canada.ca) Interest is separate from the penalty. The Canada Revenue Agency says it charges compound daily interest starting the day after the due date on unpaid 2025 taxes, including amounts that show up later in a reassessment. (canada.ca) The agency’s advice is blunt: file on time even if you cannot pay on time. That avoids the late-filing penalty, though interest still keeps running on the unpaid balance. (canada.ca) Recent tax-season guidance has focused on a different problem: Canadians chasing deductions that do not exist. Jason Heath wrote in MoneySense on April 14 that taxpayers often lose more from obvious filing errors than they gain from hunting unusual write-offs. (moneysense.ca) One common mistake is treating registered education savings plan contributions like registered retirement savings plan contributions. Registered education savings plan deposits are not tax-deductible, even though the account gets tax-deferred growth and usually a 20% government grant. (moneysense.ca) Another is importing United States tax rules into Canada. Mortgage interest on a home is generally not deductible in Canada unless the borrowed money was used to earn investment, rental or business income, and the Canada Revenue Agency says deductibility depends on the use of the funds, not just the property used as collateral. (moneysense.ca, canada.ca) Commuting is another frequent miss. The Canada Revenue Agency says most employees cannot deduct the cost of travel to and from work, and Heath notes that only some travel from a home office to a client site or temporary workplace may qualify when the home is the principal place of employment. (canada.ca, moneysense.ca) Home-office claims also come with paperwork. Employees generally need a signed Form T2200 from their employer, and the Canada Revenue Agency says the detailed method applies for current returns after the temporary flat-rate method used during the pandemic years ended with the 2022 tax year. (canada.ca, canada.ca) Some deductions are real but narrower than people assume. Child care expenses can be deducted only in specific situations tied to earning income, schooling or research, and the Canada Revenue Agency says the lower-income spouse usually has to claim them; moving expenses can be deducted only when a move meets the agency’s eligibility rules and are claimed on Form T1-M. (canada.ca, canada.ca, canada.ca) The practical deadline is still the same one from the start: April 30 for most filers, April 30 to pay even for the self-employed, and no tax break is large enough to erase a late-filing penalty you did not have to trigger. (canada.ca, canada.ca)
