Tracking Income and Expenses Properly
Simple methods for keeping records the CRA accepts. Covers what counts as deductible and how to organize everything efficiently.
Read Article
Understanding Quarterly Tax Instalments
When you need to pay, how much you owe, and what happens if you don't. Includes tips for budgeting quarterly payments into your cash flow.
9 min read
Intermediate
July 2026
Written by
TaxTrail Canada Editorial Team
Editorial Team
Written by the TaxTrail Canada editorial team, focused on practical, clear guidance for Canadian freelancers navigating self-employment taxes.
Why Quarterly Instalments Matter
If you're self-employed in Canada, you've probably heard about quarterly tax instalments. But here's the thing — they're not optional if the CRA thinks you owe more than a certain amount. We're talking about setting aside money four times a year to cover your tax bill.
The system exists because the CRA doesn't want you showing up with a massive bill on April 30th. Instead, you're expected to pay in chunks: March, June, September, and December. Miss these payments? Interest and penalties kick in quickly. That's why understanding how they work isn't just helpful — it's essential.
Quick Facts
- Payments due: March 15, June 15, September 15, December 15
- Required if you owe more than $3,000 in tax
- Each instalment typically covers 25% of your estimated annual tax
- Late payments accrue interest at prime + 2%
When the CRA Says You Must Pay
The CRA doesn't force every freelancer to pay instalments. There's a threshold. If your net tax owing is $3,000 or more (or $1,500 in Quebec), you're expected to start making quarterly payments.
Here's what happens: After you file your tax return, the CRA calculates how much tax you owe. If it's over that threshold, they'll send you a letter explaining your instalment obligations. You don't get to ignore it. The CRA will include a payment schedule showing exactly what you need to pay each quarter.
Important: Even if you don't receive a letter, you're still required to pay if you owe more than $3,000. The CRA expects you to know this and act accordingly.
Some freelancers reduce their tax owing through better deductions or income management. If you can get your estimated tax below that $3,000 threshold, you won't need to pay instalments. But you'll need to plan this carefully and have documentation to back it up.
Calculating What You Owe Each Quarter
The CRA gives you options for calculating your instalments. Most people use the "current year" method, which means you estimate what you'll earn this year and divide the expected tax by four.
Let's say you expect to earn $75,000 in net income this year. After considering your tax bracket (roughly 30% combined federal and provincial), that's about $22,500 in tax. Divide that by four, and each quarterly instalment would be around $5,625.
You can also use the "prior year" method, which bases your payments on last year's actual tax owing. This is simpler if your income's stable, but it won't work if you had a huge income jump. The CRA expects you to adjust your instalments if you realize your income will be significantly different.
Three Payment Methods
- Online banking — most freelancers do this directly through their bank's CRA payment system
- By mail — cheque or money order, though it's slower and riskier
- Phone — call the CRA's payment line, though you'll need your account info ready
What Happens If You Miss a Payment
Missing a quarterly instalment payment isn't like forgetting to file your return. The consequences are immediate and they compound.
The CRA charges interest on any late or missed instalments. Currently, that interest rate is the prime lending rate plus 2%. If you're three months late on a $5,000 instalment, you're looking at roughly $250-300 in interest charges on top of the original amount you owe. That adds up fast when you've got four payments a year.
There's also the penalty aspect. If the CRA determines you intentionally underpaid or failed to pay, they can add a 50% penalty to the interest charges. That turns a bad situation into a really expensive one. It's not something you want to find out about during an audit.
Late Payment Reality
A $5,000 late instalment payment at 7% interest becomes $5,350 after three months. Multiply that across four quarters and you're looking at $1,400+ in extra costs for the year. That's money you can't write off.
If you realize you can't make a payment, contact the CRA before the due date. They're more willing to work with you if you reach out proactively. You might be able to arrange a payment plan or adjust your instalment amounts based on revised income projections.
Building Quarterly Payments Into Your Cash Flow
The real challenge isn't understanding the rules — it's actually having the money available when the payments are due. That's where cash flow planning becomes critical.
Set Up a Separate Account
Open a dedicated savings account for tax instalments. Every time you invoice a client, move 25-30% of your expected tax into this account. You'll know exactly where that money is and you won't accidentally spend it on something else.
Calendar Your Payments
Set phone reminders or calendar notifications for March 1, June 1, September 1, and December 1. Don't wait until the 15th. You'll want time to ensure the payment goes through. The CRA doesn't accept "my bank was slow" as an excuse.
Review and Adjust Annually
Your instalment amount should change if your income situation changes significantly. If you know you're going to have a slower year, notify the CRA and reduce your payments. This prevents overpaying throughout the year.
Track What You're Setting Aside
Use a simple spreadsheet or accounting software to log how much you've reserved for taxes. Include both instalments and your annual return balance. This gives you a complete picture of your tax liability.
Pro tip: If you use accounting software like Wave or QuickBooks, you can set up automatic reminders and even estimate your quarterly amounts based on actual income data. It takes the guesswork out of the calculation.
Important Disclaimer
This article is educational in nature and is not financial or investment advice. The information provided is meant to help you understand the general concepts of quarterly tax instalments in Canada. Tax situations vary widely depending on your personal circumstances, income level, province of residence, and business structure. Outcomes are not guaranteed and may vary based on your specific situation. For personalized tax advice tailored to your freelance business, please consult with a qualified accountant, tax professional, or the Canada Revenue Agency directly. Always verify current rules and deadlines with official CRA sources before making payment decisions.
Take Control of Your Tax Obligations
Quarterly tax instalments aren't something to fear if you understand how they work and plan ahead. The key is treating them like a business expense — because they are. Set aside money consistently, know your payment dates, and stay organized.
Most freelancers who get into trouble with the CRA do so because they didn't plan for tax payments. You're different. By reading this, you're already ahead of the game. Now take the next step: set up that separate account, create a reminder system, and make a plan for your specific situation.
The CRA's system isn't designed to trip you up — it's designed to make sure taxes get paid throughout the year. Work with it, not against it, and you'll avoid penalties, interest, and stress.
Continue Learning
Explore more guides to strengthen your tax filing knowledge
Common Deductions You Shouldn't Miss
Home office expenses, equipment, professional fees, and other legitimate write-offs that reduce your taxable income.
Read Article
Setting Up Your Record-Keeping System
A step-by-step approach to organizing financial records that'll save you time at tax season and protect you in audits.
Read Article