A quarterly side hustle money check-in is a short routine you do at the end of March, June, September and December: match your records to your bank account, add up taxable sales for the GST/HST small supplier test, top up your tax savings, check whether instalments apply, and see which work is paying. Quarters are the natural unit in Canada because the CRA measures the $30,000 GST/HST threshold over calendar quarters (CRA), and instalment due dates fall in each quarter (CRA).
This is the year-round routine. The fall-only version, with year-end deadlines and January slips, is side hustle tax prep before January. For the records the check-in relies on, see record-keeping for side hustles and free and cheap bookkeeping tools.
| Check | What you do | Rule behind it |
|---|---|---|
| 1. Reconcile | Match every deposit and expense to an invoice or receipt | CRA business records |
| 2. GST/HST test | Add this quarter’s taxable sales and the last four quarters | $30,000 small supplier test |
| 3. Tax savings | Compare the tax account with your set-aside rate times profit | How much tax to set aside |
| 4. Instalments | Check for a CRA reminder and the next due date | Who pays instalments |
| 5. Profit per hour | Income minus costs, divided by hours, per hustle | Your own tracker |
What should a quarterly side hustle money check-in cover in Canada?
Block 30 minutes in the first week after each quarter ends and run the same five checks.
Step 1: Reconcile records
Match each business account transaction to an invoice or receipt. The CRA expects records that support your income and expenses (CRA). Fix gaps now while you still remember them.
Step 2: Run the GST/HST small supplier test
Total this quarter’s taxable sales from all your businesses, then add the previous three quarters. The CRA’s rules have two triggers (CRA):
- Over $30,000 in a single calendar quarter: you stop being a small supplier on the sale that takes you over, and must charge GST/HST on that sale.
- Over $30,000 over four consecutive quarters, but not in one: you stop being a small supplier at the end of the month after the quarter in which you went over.
If you’re getting close, read GST/HST registration for side hustles before next quarter. Ride-hail drivers register from the first fare regardless.
Step 3: Top up tax savings
Multiply this quarter’s profit by your set-aside rate and compare it with what’s in the tax account. Remember self-employed CPP: both portions, 5.95% each in 2026 (CRA).
Step 4: Check instalments
You may have to pay instalments if your net tax owing is more than $3,000 ($1,800 in Quebec) this year and in either of the two previous years (CRA). The CRA sends instalment reminders to people likely to have to pay. Due dates are March 15, June 15, September 15 and December 15. See CRA tax instalments for side hustles.
Step 5: Review profit per hour
For each hustle, income minus costs divided by hours. Drop or reprice what isn’t working; see the pricing worksheet.
Illustrative example
This is a teaching sketch with assumed numbers. A freelance writer does a check-in on July 3. Records match, apart from one missing software receipt, which they download. Taxable sales were $6,500 this quarter and $21,000 over the last four, so they’re not near $30,000 yet but will watch next quarter. Their tax account holds $3,100; profit this quarter was $5,900 and their set-aside rate is 25%, so they move $1,475 for this quarter. No instalment reminder arrived. Profit per hour on blog posts beats newsletter editing, so they decide to quote newsletters higher.
How does the December check-in differ?
It’s the same five checks plus year-end work: gathering a full year of receipts, recording your vehicle’s odometer, preparing for platform slips in the new year, and planning your return. Side hustle tax prep before January covers that list in detail.
What mistakes do people make with quarterly money check-ins?
- Only checking once a year, when the GST/HST test and instalments are quarterly.
- Counting one hustle for GST/HST instead of all your businesses.
- Topping up tax savings from personal money in April instead of from the business account each quarter.
- Ignoring an instalment reminder.
- Skipping the profit review because the totals look fine.
How does a quarterly check-in help with side hustle taxes in Canada?
By April, four check-ins have already reconciled the year, tracked the GST/HST threshold and built the tax savings, so filing Form T2125 is mostly copying totals. A tax account at an online bank or KOHO keeps the set-aside separate. For filing, see reporting side hustle income to the CRA.
This is not tax, legal, or insurance advice.
Which guides sit next to the quarterly money check-in?
The one-page business plan sets the targets the check-in reviews, first-year side hustle money mistakes lists what it catches, and the admin tools checklist covers the setup it needs. Use the check-in alongside tracking which side hustles pay and the first-year price review.
What are the common questions?
Why should side hustlers check their money every quarter?
The CRA's GST/HST small supplier test is measured over calendar quarters, and income tax instalments are due in March, June, September and December, so quarters match the rules.
How do I know if I've passed the GST/HST threshold?
Add taxable sales from all your businesses. If you go over $30,000 in a single quarter, or over $30,000 across four consecutive quarters, you're no longer a small supplier and must register.
When are CRA tax instalments due?
March 15, June 15, September 15 and December 15, for people whose net tax owing is more than $3,000 ($1,800 in Quebec) this year and in either of the two previous years.
How long does a quarterly check-in take?
About 30 minutes if your records are up to date and business money runs through one account. Longer if receipts are scattered.
Is the December check-in the same as year-end tax prep?
It includes the same five checks plus year-end tasks such as recording your odometer, gathering a full year of receipts and preparing for platform slips.
Which sources support this guide?
The rules, rates, and platform requirements in this guide are checked against these primary sources. Retail price ranges are labelled as ranges to verify locally, and they are not quotes.
- When to register for and start charging the GST/HST — Canada Revenue Agency
- Required tax instalments for individuals: who has to pay — Canada Revenue Agency
- Required tax instalments for individuals: payment due dates — Canada Revenue Agency
- Business records — Canada Revenue Agency
- CPP contribution rates, maximums and exemptions — Canada Revenue Agency