Almost every detailing shop in Canada starts the same way: you get busy, a friend helps out on Saturdays, you pay them cash, and eventually you're running a payroll without ever having decided to.
Then someone asks for a T4, or a WSIB claim happens, or the CRA sends a letter. This is a plain-language guide to the choices, written for shop owners rather than accountants.
This isn't legal or tax advice. It's the shape of the decision, so that the conversation with your accountant takes twenty minutes instead of two hours.
T4 versus T4A, in one paragraph
A T4 is what you issue an employee. You withhold income tax, CPP and EI from their pay, you contribute the employer's share of CPP and EI on top, and you remit the lot to the CRA on a schedule. They get vacation pay, statutory holiday pay and the protections of provincial employment standards.
A T4A is what you issue a self-employed contractor for fees paid. No withholding, no CPP or EI on your side, no vacation pay. They invoice you, they handle their own taxes, they're running their own business.
The second one is cheaper and simpler, which is exactly why so many shops use it when they shouldn't.
The CRA does not care what you call it
This is the part that costs shops real money. You don't get to choose the classification by writing "contractor" on an agreement. The CRA looks at the actual working relationship, and the tests are roughly:
Control. Do you set their hours? Tell them which cars to do, in what order, to what standard? Supervise the work? The more control, the more it looks like employment.
Tools and equipment. Do they bring their own polisher, extractor, chemicals and machine, or do they use yours? Someone using entirely your equipment, in your bay, looks like an employee.
Chance of profit / risk of loss. Can they make more by working efficiently, or less by making a mistake they have to fix at their own cost? A genuine contractor carries business risk. Someone paid $22 an hour whatever happens does not.
Integration. Are they doing work that is central to your business, alongside your staff, indistinguishable from them to a customer? Or are they a specialist coming in for a defined piece of work?
Apply those honestly to a full-time detailer who works your hours, in your shop, with your machines, on the cars you assign them. That's an employee, and calling them a contractor doesn't change it.
What it costs to be wrong
If the CRA reclassifies a contractor as an employee, you're generally liable for the CPP and EI that should have been withheld and contributed — both halves — plus interest and penalties, going back over the assessed period. For a full-time person over two years, this can comfortably run five figures.
You may also find you have no workers' compensation coverage for someone the board considers your worker, which is the version of this problem that ends businesses rather than just hurting them.
Where each one genuinely fits
Employees (T4) are the right answer for your core crew: the people who work your hours in your shop with your equipment. It's more admin and more cost, and it's also what buys you the right to direct their work, set standards and build a team.
Contractors (T4A) genuinely fit for:
- A mobile PDR tech who comes in with their own tools for specific cars
- A ceramic coating specialist you bring in for high-end work
- A tinter who works on their own schedule across several shops
- Overflow help during a hail event
Notice the pattern: specialists, own tools, own schedule, defined scope.
Hourly versus per car
This is a separate question from T4 versus T4A, and it's where the operational thinking happens.
Hourly is predictable for the person and risky for you. If a job takes twice as long, you pay twice as much. It suits work where quality depends on time taken — correction, coating, anything where rushing shows.
Per car (piece rate) flips the risk. The detailer who works efficiently earns more per hour; the one who dawdles earns less. It suits standardised, repeatable work — dealer recon, maintenance washes, lot work — where the scope genuinely is the same car to car.
Per-car pay has two failure modes worth naming:
- It rewards speed over quality. Pair it with a redo policy, or you'll get fast cars that come back.
- In Canada, piece-rate workers who are employees must still make at least minimum wage for the hours worked. If a slow week means someone's piece earnings work out under minimum wage for their hours, you owe the difference. This catches shops out constantly.
A common and sensible hybrid: hourly base for shop time, plus a per-car bonus on completed units. Predictable floor, upside for output.
What Canadian shops actually pay
Rough 2026 bands for a shop in a mid-to-large Canadian city. Your market will vary and these move fast:
| Role | Typical |
|---|---|
| Entry-level detailer / wash bay | $17–20 / hour |
| Experienced detailer | $22–28 / hour |
| Coating or correction specialist | $30–40 / hour, or per job |
| PDR technician (contractor) | Per panel, often 40–60% of the billed rate |
| Tint installer | Per car or 40–50% of the billed rate |
The percentage-of-billing models are common for specialists and are usually the cleanest way to align a contractor's incentive with yours.
The two administrative things that actually bite
Remittance deadlines. Once you have employees, source deductions are typically due by the 15th of the month following the pay. Missing these attracts penalties immediately and mechanically. Set the reminder before you set anything else up.
Records. You need hours worked, rates, gross and net, deductions, and vacation pay accrued — per person, per period, kept for six years. In a shop where people clock in on a phone and get paid a mix of hourly and per car, this is where things quietly fall apart.
Make payroll a lookup, not a reconstruction
The reason payroll is painful in a detailing shop is almost never the arithmetic. It's that the inputs live in four places: hours in someone's head or a paper sheet, jobs in a calendar, per-car rates in a text thread, and the money in a spreadsheet built last spring.
If you record what each person earns at the moment the work is priced, on the job itself, then payroll at the end of the period is reading a total that already exists. That's the entire trick, and it's why Concorso puts a technician payout on every service line separately from what the customer is charged — with T4 employees on clocked hours, T4A contractors on hours or per car, each on their own pay cadence.
It won't file your remittances. It will mean you know what you owe without spending a Sunday finding out.
The five-minute version
- If they work your hours, in your shop, with your tools, on cars you assign — they're an employee. Pay them as one.
- Contractors should be genuine specialists with their own equipment and their own schedule.
- Hourly for quality-dependent work, per car for standardised work, and know that employees on piece rate still need minimum wage covered.
- Record hours and payouts as the work happens, not at month end.
- Take the classification question to an accountant once, properly. It's the cheapest hour you'll buy this year.
See how Concorso handles payroll — pay periods built from finished work, per-person rates and cadences, and a period that won't approve while a car on it is still unpriced.