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Fitness business accounting comes down to two questions: are you over the $30,000 GST/HST line, and do you know what you actually keep? A solo trainer who nets $45,000 in Ontario pays about $10,061 in income tax and CPP, which is 22.4% of the profit. Everything else hangs off those two.
When does a personal trainer need to charge GST/HST?
The small supplier rule is the first gate. If your taxable sales stay at or under $30,000 across four calendar quarters in a row, you’re a small supplier and don’t have to register. You can still register by choice if you sell taxable goods or services in Canada. The CRA’s page on when to register for and charge the GST/HST lays out both the single-quarter and the four-quarter tests.
Cross it in a single quarter and you start charging on the very sale that took you over, and your registration is effective no later than that day. You then have 29 days to complete the registration. Cross it slowly over several quarters and you get a short grace period, until the end of the month after the quarter in which you passed $30,000.
So don’t wait for a tax-time surprise. A studio that adds a few group classes can pass the line in one busy January. Add up your sales each quarter, not at year end.
| Situation | What the CRA page says |
|---|---|
| Taxable sales of $30,000 or less over four quarters | Small supplier, registration optional |
| Over $30,000 in one quarter | Charge on the sale that crossed it |
| Over $30,000 across several quarters | Registered no later than your first sale after the month following that quarter |
| Small supplier who registers anyway | Allowed, effective date is usually the day you ask |
What does the tax look like on a session price?
In Ontario the HST is 13%. A $100 session becomes $113.00 with $13.00 of tax, which you collect for the government and pass on. The GST/HST calculator does the same sum for any province, and the HST reverse calculator works backwards when a client paid $113 and you need the price before tax.
Whether a given service, membership or class pack is taxable is a separate matter, and no simple list covers every fitness product. Check the CRA’s GST/HST pages for what you sell before you set your prices.
How much of your income do you keep?
Here’s the part people skip.
On $45,000 of net business income in Ontario, the self-employed tax calculator gives $5,122.49 of income tax and $4,938.50 of CPP, since you pay both the worker and the employer halves. That’s $10,060.99 together and $34,939.01 left.
Notice what’s missing. The tool leaves out EI, your business costs and any instalments, and it takes net income, so subtract rent, insurance and equipment first. A trainer who charges $60,000 but spends $15,000 on studio rent and gear is the $45,000 case above. That works out to roughly $2,900 a month in take-home, before any instalments, so it’s worth setting that tax money aside early instead of treating every deposit as spendable.
It pays to know your margin per service too. The profit margin calculator shows whether a $40 group class with a rented room leaves anything after costs.
How should fitness business accounting be organized?
A gym or studio often has several kinds of money coming in: memberships, classes, one on one sessions, drop-in fees and retail. Put each in its own account or category from day one. It makes the quarterly GST/HST check simple, and it shows which line is paying the rent.
Costs deserve the same care. Keep receipts for equipment, music licences, insurance, software, rent and cleaning. If you train clients in a room at home, the shared costs need a fair split, and you should write down how you worked it out.
The accounting method matters as well. The CRA’s page on accounting methods says most self-employed people must use accrual, which means income counts when earned, not when the money lands. A prepaid ten-class pack is a good example of where that gets awkward. If a client pays $300 for ten classes and uses three this month, only part of the money may be earned yet. There’s no simple CRA rule for class packs that this page can quote, so ask your bookkeeper how they treat them.
What records should a studio keep each month?
Keep a sales list split by income type, a folder of expense receipts, the bank and card statements, and a running tally of taxable sales for the quarter. Check the tally on the first day of each new quarter. If it’s creeping toward $30,000, you’ll see the registration date coming instead of being hit by it. Keep all of it for six years from the end of the last tax year it relates to, and back up the digital copies somewhere other than the studio laptop.
Contractors, employees and payroll
Many studios run on instructors paid per class. Whether someone is a contractor or an employee decides who pays CPP and EI, and the CRA has its own test for it, so read their guidance before you label a worker. If you do have employees, the payroll remittance calculator shows what you hold back and what you add on top.
Where we got these figures
The $30,000 threshold and the registration rules come from the CRA page on when to register for and charge the GST/HST. The accrual statement comes from the CRA accounting methods page. Tax and CPP figures come from our 2026 calculator data. Taxable status for individual fitness products isn’t stated here, and no government body has reviewed this page.
Frequently asked questions
When does a fitness business have to register for GST/HST?
When taxable sales pass $30,000 over four calendar quarters. Pass it in one quarter and you charge on the sale that crossed the line.
Can a trainer register for GST/HST before hitting $30,000?
Yes. Small suppliers can register voluntarily if they make taxable supplies in Canada.
How much tax does $45,000 of trainer profit leave?
In Ontario, about $10,061 in income tax and CPP, so $34,939 is left, before EI and instalments.
Do I need payroll for instructors?
Only if they're employees. We didn't cover the CRA test for contractor status, so read their guidance first.
Are memberships and class packs taxable?
We couldn't confirm a simple answer. Check the CRA GST/HST pages for each thing you sell.
- 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