Subcontractor or Employee? CRA Worker Classification Rules for Ontario Contractors
- Jul 30
- 7 min read
Updated: 7 days ago
Last reviewed: July 2026
A written agreement calling someone a subcontractor does not make them one. The CRA decides worker status by looking at how the relationship actually operated, weighing control, who supplied the tools, whether the worker carried a real chance of profit and risk of loss, and whether they were running their own business. If a worker is reclassified as an employee, the payer owes both the employee and employer shares of CPP and EI, plus penalties and interest.
That is the exposure. Here is what decides the answer and what a wrong one costs an Ontario contractor.
The four tests at a glance
Test | Points to employee | Points to subcontractor |
Control | Set hours, assigned tasks, told how to do the work, required at internal meetings | Prices a scope, controls own schedule and method |
Tools and equipment | Uses the payer's truck, tools and materials | Owns, maintains and replaces own truck, tools and insurance |
Chance of profit / risk of loss | Paid hourly, payment guaranteed for hours worked | Quotes fixed prices, absorbs overruns, carries receivables, can lose money |
Integration | Works only for the payer, full time, for years | Multiple clients, own HST number, own business name, own crew, own advertising |
No single factor decides it. The whole picture governs.
Does a signed subcontractor agreement protect me?
No. Written intent is one factor among several, not the deciding one.
If both parties genuinely intended a contractor relationship, that intention is weighed. But when the day-to-day reality looks like employment, intent loses. A well-drafted agreement describing a relationship that does not actually exist is worse than no agreement, because it demonstrates that the distinction was understood and papered over anyway.
The classic trigger is not an audit. It is a worker whose work dried up applying for EI, Service Canada asking a question, and a file opening from there.
What are the CRA tests for employee versus self-employed?
For a contract formed outside Quebec, the CRA applies a two-step approach based on common law principles and jurisprudence. Step one looks at what the parties intended the relationship to be. Step two examines the actual working relationship against a set of factors, and step two is what decides the outcome when the two steps disagree.
Note for anyone who has researched this before: the CRA's long-standing guide RC4110, Employee or Self-employed?, was cancelled as of January 30, 2026 and replaced by the CRA's employment status pages. A great deal of the advice circulating online still cites the withdrawn guide.
The factors weighed at step two:
Control. Who decides what gets done, when, where and how. Set hours, assigned tasks, mandatory attendance at the morning meeting and instruction on method all point to employment. A subcontractor who takes a scope, prices it and delivers it on their own schedule points the other way.
Ownership of tools and equipment. Who supplies them, maintains them and replaces them when they break. A framer with his own truck, compressor, saws and insurance looks self-employed. A worker using the payer's van and tools looks like staff. In the trades this is frequently the single most telling factor.
Chance of profit and risk of loss. Can the worker earn more by working smarter, or lose money on a badly priced job. Real subcontractors quote work, absorb cost overruns, carry receivables and can finish a project behind. An hourly rate with guaranteed payment for hours worked is not risk, it is a wage.
Integration. Is the worker running their own business or forming part of the payer's. Multiple clients, an HST registration, their own advertising, their own crew and their own business name support subcontractor status. Working exclusively for one payer, full time, for years, does not.
The fact pattern that draws CRA attention in the trades
Certain combinations get looked at quickly:
One subcontractor working exclusively for a single payer, full time, across multiple years
Payment by the hour with no fixed-price scope
No HST registration despite billings well above the small supplier threshold
The payer's tools, truck, materials and schedule
No WSIB clearance certificate on file
Invoices prepared by the payer, or invoices that all look identical and arrive on the payroll cycle
Three or four of those describing someone on a crew is a real exposure, and it grows with every pay period.
What does misclassifying a worker cost?
When the CRA reclassifies a subcontractor as an employee, the payer owes the source deductions that should have been withheld and remitted. Both halves.
Using 2026 rates to show the scale, for one worker earning $75,000:
Component | 2026 figures | Approximate cost |
CPP, employee share | 5.95% on pensionable earnings to $74,600 | $4,230.45 |
CPP, employer share | 5.95%, matched | $4,230.45 |
EI, employee share | 1.63% on insurable earnings to $68,900 | $1,123.07 |
EI, employer share | 1.4 times the employee rate | $1,572.30 |
CPP and EI subtotal | over $11,000 |
That is one worker, one year, before income tax, penalties or interest. Across a crew of five over three years, the arithmetic gets serious quickly.
Then add:
A penalty for failing to deduct, which increases for repeat occurrences
Interest, compounded daily from the date each remittance should have been made
The practical reality, which is that the employee's share is theoretically recoverable from the worker but is not recovered in practice on a job that ended two years ago. The payer funds both sides
The CRA is not the only agency with an interest. Under Ontario's Employment Standards Act, treating an employee as a contractor is prohibited, and the Ministry of Labour can order back vacation pay, overtime, public holiday pay and termination pay. WSIB has its own construction rules, where independent operators generally must be registered, and coverage gaps become expensive after an injury.
One reassessment can produce three separate bills.
How to protect your construction business
Onboard subcontractors like businesses, not like hires. Before the first payment: legal name, Business Number, verified HST registration number, WSIB clearance certificate, certificate of insurance, and a scope-based written agreement. The same file also feeds your T5018 slips at year end.
Pay against real invoices for real scopes. A subcontractor's invoice should reference a job and a scope, not just "40 hrs @ $35". If the payer is writing the invoices, the worker is not running a business.
Keep WSIB clearances current. Not once at the start. Every renewal period, on file, for every subcontractor.
Let subcontractors be subcontractors. Do not schedule them like staff, supply their tools, or require attendance at internal meetings. If a role genuinely needs someone under your control, on your schedule, using your equipment, hire them. Payroll is a cost. A reassessment is a cost plus penalties plus interest plus a distraction during the busiest month of the year.
Get a ruling when it is genuinely unclear. Either the payer or the worker can ask the CRA to rule on a worker's status. It takes time and produces an answer that can be relied on instead of a hope.
Fix it forward, not just backward. Where a worker is clearly an employee, moving them onto payroll now is the single most effective way to cap the exposure. Every additional pay period adds to it.
Frequently asked questions
Is a signed subcontractor agreement enough to protect me?
No. Written intent is one factor. If the actual working relationship shows control, the payer's tools, no risk of loss and no independent business, the CRA can reclassify the worker regardless of what the agreement says.
What tests does the CRA use to decide if a worker is an employee?
For contracts formed outside Quebec the CRA uses a two-step approach based on common law. Step one considers what the parties intended. Step two weighs the actual working relationship: control over the work, ownership of tools and equipment, the worker's chance of profit and risk of loss, and the degree of integration into the payer's business. Step two governs when the two disagree.
My subcontractor has an HST number. Does that settle it?
It helps but does not decide it. An HST registration supports the picture of an independent business and is one factor among several.
Does having the worker incorporate solve the problem?
Not automatically, and it can create a different one. A one-person corporation working exclusively for a single payer can fall within the personal services business rules, which are punitive for the worker's corporation. Incorporation is not a shortcut around classification.
What if the worker wants to be treated as a subcontractor?
Preference does not determine status. Both parties wanting a contractor relationship is relevant to intent, but the facts of the working relationship govern the outcome.
What does it cost if the CRA reclassifies my subcontractor as an employee?
The payer owes both the employee and employer shares of CPP and EI that should have been remitted, plus a penalty for failing to deduct and interest compounded daily. On one worker earning $75,000, CPP and EI alone exceed $11,000 for a single year at 2026 rates.
How far back can the CRA reassess worker status?
Assume more than one year. Reassessments in this area routinely cover several, and interest runs from each missed remittance date.
Can I ask the CRA to decide before there is a dispute?
Yes. Either the payer or the worker can request a ruling on whether the worker is an employee or self-employed. It is the cleanest way to remove uncertainty on a relationship you cannot confidently classify.
Key takeaways
The contract is evidence, not the answer. The CRA looks at how the relationship actually worked
Four tests: control, tools, chance of profit and risk of loss, and integration. No single one decides it
In the trades, who owns the tools and the truck is often the most telling factor
CPP and EI on one reclassified worker at $75,000 exceeds $11,000 for a single year at 2026 rates, before penalties and interest
The CRA, the Ministry of Labour and WSIB can each pursue the same misclassification
Collect Business Numbers, HST registrations, WSIB clearances and scope-based agreements before the first payment
Talk to an accountant who works with contractors
Worker classification is among the highest-cost mistakes in construction and it is entirely preventable. SKG Financial reviews subcontractor arrangements for construction and trades corporations across Mississauga, Oakville, Vaughan, Markham, King City, Caledon and Burlington, identifies where the real exposure sits, and fixes the process so it stops recurring. Getting this wrong is expensive, and it is one of the reasons we built a dedicated practice for Ontario contractors rather than treating construction like any other file.
Fixed fees quoted up front. Straight answers, no lecture.
References: CRA Employment status: employee or self-employed and determine the employment status, which replaced the cancelled guide RC4110 as of January 30, 2026. CPP contribution rates and maximums, EI premium rates and maximums. General information only, not advice on a specific working relationship.
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