Guides

Ten pages from CRA and Revenu Québec sources read on 17 October 2026. The self-employed filing and payment trap is first, then instalments, T4 slips, payroll remittances, GST/HST, the tax-shelter exception and Quebec. Nothing here is an instruction to pay a particular amount.

• Self-Employed Canada 2027: File 15 June, Pay 30 April
  Self-employed? Your 2026 return is due 15 June 2027, but any balance owing is still due 30 April 2027 (CRA). Examples and the tax-shelter exception.3 min read
• Canada Tax Instalments 2027: 15 March to 15 December
  CRA personal tax instalments are due 15 March, 15 June, 15 September and 15 December 2027, if required. Reminders and what is unverified.3 min read
• Who Must Pay Tax Instalments in Canada? $3,000 Test
  CRA: instalments may be required if net tax owing is over $3,000 ($1,800 in Quebec) this year and in one of the two prior years. Reminder rules explained.3 min read
• T4 Filing Deadline 2027 in Canada: 1 March Expected
  T4 and T4A slips are due the last day of February; because 28 February 2027 is a Sunday, the deadline is expected to move to 1 March 2027.3 min read
• Payroll Remittance Due Dates in Canada by Remitter Type
  CRA payroll remittance due dates depend on your remitter type: regular 15th of next month, quarterly, or accelerated. How AMWA sets the type.3 min read
• GST/HST Deadlines 2027 for Self-Employed Filers
  Self-employed GST/HST annual filers with 31 December year-end: pay 30 April 2027, file 15 June 2027. Monthly and quarterly: one month after the period.4 min read
• GST/HST reporting period, instalments, and the weekend rule
  How the CRA assigns annual, quarterly, and monthly GST/HST periods, when instalments fall, and how a weekend or holiday moves a date.5 min read
• Tax Shelter Exception: 30 April 2027 Filing Deadline
  Self-employed with business spending mainly on tax shelter investments? The CRA filing deadline is 30 April 2027 instead of 15 June. What it says.3 min read
• Quebec Self-Employed Deadlines: What to Check Locally
  Quebec residents file a separate provincial return with Revenu Québec. What the CRA pages say, what they do not, and what to confirm yourself.3 min read
• Free CRA pages for the 2027 self-employed calendar
  Official Canada.ca pages for 2027 business deadlines, GST/HST, payroll, and holidays. No product links and no affiliate links.4 min read