Updated Checked by the Tax-Services.ca editorial team How we check
Seasonal bookkeeping works when you record every month the same way, including the dead ones, and set cash aside in the busy months for the quiet ones. Your tax deadlines don’t follow your season, and the six year record rule still applies to a business that only opens in summer.
Why does a seasonal business need monthly books?
Because the year-end total hides the pattern. A patio bar that earns most of its money between June and September looks fine on an annual statement and terrible in February. Monthly books show when cash runs short, so you can plan a loan or a cost cut before it happens.
Reconcile the bank account every month, even in a month with three transactions. Skipping the off-season means you come back in spring with four months of gaps, and that’s where errors and missing receipts pile up. The books for a closed month take twenty minutes. Rebuilding them costs a weekend.
Picture Jo, who runs a kayak rental on a lake outside Kenora. In July she’s busy from dawn. In January she has one hydro bill and an insurance payment. She still sits down on the first Sunday of every month, ticks off the bank statement, and files the paperwork. It’s a small habit, and she won’t be hunting for receipts in May.
How does GST/HST filing work if you only trade part of the year?
The CRA assigns a reporting period by your annual taxable supplies. At $1.5 million or less it’s annual, above that and up to $6 million it’s quarterly, and above $6 million it’s monthly. Annual filers can elect to file quarterly or monthly, which some seasonal businesses do to avoid holding a big tax balance for months.
| Reporting period | Taxable supplies | Due |
|---|---|---|
| Annual | $1,500,000 or less | 3 months after fiscal year end |
| Quarterly | Over $1,500,000 to $6,000,000 | 1 month after the quarter |
| Monthly | Over $6,000,000 | 1 month after the month |
A sole proprietor with a December 31 year end and business income has a later deadline: payment by April 30, and filing by June 15. The CRA’s page on GST/HST reporting requirements and deadlines lists the conditions. Check that date against your own situation, since a due date on a weekend or holiday moves to the next business day.
Whatever period you use, keep the tax you collect in a separate account. In the summer rush, it’s easy to spend HST that isn’t yours. The GST/HST calculator shows the split on any price, for example $312 of HST on a $2,400 sale in Ontario.
What does seasonal payroll cost?
Every time you hire, you deduct and remit. The CRA says employers must deduct CPP and EI from most amounts they pay, and match their share. Suppose you take on eight staff at $1,200 each every two weeks in Ontario for a 16 week season. The payroll remittance calculator puts each pay period’s remittance at $2,209.30, made up of $819.50 income tax, $507.12 CPP and $156.48 EI held back plus $726.20 from you as employer.
Over eight pay periods that’s $17,674.40 to send to the CRA. The full cost of the payroll is $10,326.20 a period, so $82,609.60 over the season. Budget for that number, not the $76,800 of gross wages.
What does each worker take home? The take-home pay calculator answers it. Vacation pay, holiday pay and overtime rules depend on the province, and they aren’t verified for this page, so use the provincial labour standards site for those.
How do you get through the quiet months?
Build a reserve. A common target is enough cash to cover your fixed costs for the whole off-season. Work it out from last year’s books: rent, insurance, loan payments and any staff you keep on.
A quick example. Say your fixed costs are $4,200 a month and the shop is closed for five months. You’d want about $21,000 set aside by the end of the season. Divide that by the number of busy months, and you can see how much of each week’s takings needs to go into the reserve instead of your pocket.
If you can’t build it, credit fills the gap for a price. Owe $20,000 on a line of credit at an example rate of 8% and the line of credit calculator shows $133.33 of interest a month. Paying $1,000 a month clears it in about 1.8 years with $1,537 of interest in total. Your rate will be different, and lines usually float with prime, so treat these as a comparison and not a quote. The budget calculator helps you spread income across twelve months.
Which mistakes hit seasonal businesses hardest?
Mixing personal and business money is the classic. In the slow months the owner pays bills from the business account, and in spring nobody can tell what was what. Open a separate account and use it.
Another is forgetting the inventory. If you hold stock at year end, count it and record its value. A leftover pile of goods on the shelf is an asset, and your profit for the year is wrong without it.
Then there’s the tax bill after a big summer. Profits arrive in three months and the tax comes months later. If you’re self-employed, look at the self-employed tax calculator in the summer, and set aside a share of each week’s takings. Rules about employment insurance and records of employment for seasonal staff weren’t confirmed here, so check those with Service Canada before you lay anyone off.
Sources, and how we checked them
Reporting periods, deadlines and the six year record rule come from the Canada Revenue Agency‘s guidance for GST/HST registrants and record keeping. The payroll and tax figures use the 2026 settings of the calculators here. The 8% line of credit rate is an example.
Frequently asked questions
Do I keep books in months when I'm closed?
Yes. Reconcile the bank account monthly so gaps and missing receipts don't pile up before you reopen.
How often do I file GST/HST if I only trade in summer?
The CRA assigns annual, quarterly or monthly periods by yearly taxable supplies, and you can elect to file more often.
What do I pay on seasonal staff?
You deduct income tax, CPP and EI from their pay and remit them with your matching share of CPP and EI.
How long do I keep records?
The CRA's default is six years from the end of the last tax year they relate to.
How do I cover the off-season?
Set aside cash in busy months. A line of credit works but costs interest, for instance $133.33 a month on $20,000 at an example 8%.
- Self-employed taxes in Canada: income, CPP and GST
How tax works when you are self-employed in Canada: reporting income and expenses, paying both halves of CPP, instalments and when to register for GST