If you owe taxes regularly in Canada, the Canada Revenue Agency (CRA) may require you to make tax instalment payments during the year instead of waiting until you file your tax return.

Many taxpayers are surprised when they receive an instalment reminder from CRA — especially self-employed individuals, investors, landlords, or people with multiple income sources.

This guide explains:

• Why CRA assesses instalments
• Who has to pay them
• How instalments are calculated
• How CRA calculates instalment interest
• How to reduce or avoid instalment penalties

What Are CRA Tax Instalments?

Tax instalments are periodic payments made throughout the year toward your expected personal income taxes.

Instead of paying your full tax bill at tax filing time, CRA may require you to prepay taxes quarterly.

Instalments apply to:

• Self-employed individuals
• Rental property owners
• Investors
• Individuals with large amounts of non-taxed income
• People receiving foreign income
• Taxpayers with insufficient payroll deductions
• Individuals with capital gains or other taxable income not subject to withholding

Why Does CRA Require Instalments?

Canada’s tax system operates on a “pay-as-you-earn” basis.

Employees usually have taxes deducted from payroll automatically. However, many types of income do not have enough tax withheld at source.

If you consistently owe taxes when filing your return, CRA may require quarterly instalments to avoid taxpayers carrying large balances until the following year.

When Will CRA Assess Instalments?

Generally, CRA may require instalments if:

• Your net tax owing is more than $3,000
  • ($1,800 for Quebec residents)
• In:
  • The current year, and
  • Either one of the two previous years

“Net tax owing” generally means:

• Income tax owing
• Plus CPP contributions payable
• Plus certain other amounts
• Minus taxes already withheld at source

Common Situations That Trigger Instalments

Self-Employment Income

Self-employed individuals usually do not have taxes withheld throughout the year, making instalments very common.

Examples:

• Contractors
• Uber drivers
• Consultants
• Realtors
• Freelancers
• Small business owners

Rental Income

Rental profits generally do not have tax withheld, so landlords may accumulate large balances owing.

Investment Income

Instalments are common when taxpayers receive:

• Dividends
• Interest income
• Capital gains
• Foreign investment income

Multiple Jobs or Insufficient Payroll Deductions

Sometimes payroll deductions are not enough to cover total taxes owed.

This may happen when:

• Working multiple jobs
• Receiving bonuses
• Having side income
• Receiving commissions

How CRA Calculates Instalments

CRA generally uses one of three methods.

1. No-Calculation Option (CRA Method)

CRA bases instalments on your prior tax balances.

Example:

• Prior year balance owing: $12,000
• CRA may request:
  • $3,000 quarterly

Typical due dates:

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

This is the method shown on CRA instalment reminders.

2. Prior-Year Option

You estimate your current year taxes based on the previous year’s income.

Useful if your income is similar year over year.

3. Current-Year Option

You estimate taxes based on your actual expected income for the current year.

This method may reduce instalments if income has decreased.

However:

If you underestimate and end up owing more, CRA may charge instalment interest.

How CRA Calculates Instalment Interest

CRA charges instalment interest when:

• Instalments are late
• Instalments are insufficient
• Required instalments were not paid

The CRA compares:

• What you should have paid
  vs.
• What you actually paid and when

Interest is calculated daily at prescribed CRA rates, which can change quarterly.

Example of Instalment Interest

Suppose CRA expected:

But the taxpayer pays:

• Nothing in March
• $5,000 in September

Even though the total was eventually paid, CRA may still charge interest because the March and June payments were late.

CRA calculates interest based on timing, not just total paid.

Instalment Penalties

Additional instalment penalties may apply if:

• Instalment interest exceeds $1,000

The penalty formula is complex, but generally applies when taxpayers repeatedly fail to make required instalments.

What Happens If You Ignore Instalments?

Possible consequences include:

• Instalment interest
• Instalment penalties
• Collection activity
• Reduced refunds
• Applied refunds toward balances owing

CRA may also continue issuing instalment reminders in future years.

Can You Reduce Instalments?

Yes.

If your income decreases, you can choose the Current-Year Option and reduce instalments accordingly.

Examples:

• Business slowdown
• Reduced rental income
• Lower investment income
• Retirement
• Losses or deductions reducing taxable income

Important:

You should keep calculations and supporting records in case CRA reviews your estimates.

How to Check Instalment Balances and History

You can review instalments in:

Personal Taxes (T1)

Through Canada Revenue Agency My Account:

• Accounts and payments
• Instalments
• Statement of account
• Account balance and interest

You can also view:

• Payments received
• Interest charged
• Upcoming instalment reminders
• Historical balances

How to Pay CRA Instalments

Common payment methods include:

• Online banking
• CRA My Payment
• Pre-authorized debit
• Through Canadian financial institutions

Always ensure payments are applied to:

• Personal income tax instalments
• For the correct tax year

Important Planning Tip

Many taxpayers wait until tax season to think about taxes owed.

However, if you are:

• Self-employed
• Earning investment income
• Receiving rental income
• Earning untaxed income

It is important to estimate taxes throughout the year to avoid:

• Unexpected balances owing
• Instalment interest
• CRA penalties

Final Thoughts

CRA instalments are not an audit or penalty by themselves.

They are simply CRA’s way of ensuring taxes are paid gradually throughout the year when insufficient taxes are withheld at source.

Understanding how instalments work can help you:

• Avoid interest and penalties
• Improve cash flow planning
• Prevent large tax balances at filing time
• Better manage your personal finances

If you are unsure whether your instalments are correct, or if your income has changed significantly, it may be beneficial to speak with a tax professional to review your situation and estimate your taxes properly.

Book a free consultation call with us