Tax Instalment Deadlines for Self-Employed: How to Avoid CRA Interest and Penalties

What this means for you: If you run your own business or work freelance and you owe more than $3,000 in taxes, you cannot wait until April to pay the government. You must pay your taxes in four chunks throughout the year. If you miss these deadlines, you will be charged a 7% interest rate on the money you owe.

Here is what you need to know to stay out of debt and keep your hard-earned money.

The Dates You Need to Mark

For most self-employed Canadians, the tax year is broken into four equal payments. You must clear your instalment balance on these days:

• March 15
• June 15
• September 15
• December 15

If any of these dates fall on a weekend or holiday, the payment is due on the next business day.

The Numbers: Thresholds and Interest

The Canada Revenue Agency (CRA) uses specific rules to decide who must pay instalments.

• The Threshold: You generally only have to do this if you owe more than $3,000 in federal income tax at the end of the year. (In Quebec, the threshold is $1,800).
• The Cost of Borrowing: For the 2026 tax year, the CRA is charging a prescribed interest rate of 7% on late or missed payments.
• The Penalty Zone: If your interest charges add up to $1,000 or more within a single calendar year, the CRA may also apply financial penalties on top of the interest.

Who is Affected

• Freelancers, Contractors, and Consultants: Anyone who earns income without an employer deducting tax from their paycheck.
• Small Business Owners: Sole proprietors and partners.
• Side Hustlers: People with full-time jobs who also earn significant self-employed income on the side, if their total tax bill exceeds the $3,000 threshold.

What You Should Do

Financial advisors suggest a simple strategy to make sure you don't get caught short.

1. Create a "Tax Only" Bank Account Open a separate high-interest savings account specifically for taxes. Do not touch this money for personal spending.

2. Set Up a DIY Withholding Plan Every time you get paid from a client, immediately transfer a set percentage (for example, 20% or 25%) into that savings account. This mimics the tax deductions an employer would make and prevents you from accidentally spending money that belongs to the government.

3. Choose a Calculation Method There are three ways to figure out how much to pay:

• No-Calculation (Recommended): Pay exactly what the CRA asks for on the reminder slips they mail you. This is the safest way to avoid penalties.
• Prior Year: Base your payments on what you owed last year.
• Current Year: Estimate your tax based on what you think you will earn this year.

4. Don't Ignore the Mail The most common mistake is ignoring the instalment reminder slips. The CRA is much more lenient with taxpayers who communicate and show they are trying to pay on time, even if they pay a small amount late.

Bottom Line

If you owe more than $3,000 in taxes, the CRA expects to be paid quarterly, not annually. With a 7% interest rate currently in effect for 2026, missing a deadline is an expensive mistake. Set up a separate savings account, automate your transfers, and pay the amounts requested on your reminder slips by March 15, June 15, September 15, and December 15.