A CRA reclassification isn't a formality. If CRA determines that someone treated as self-employed was really an employee for a period under review, the business can become responsible for payroll obligations that should have applied during that period. And when the relationship has been running for years, the potential exposure can reach well beyond the current payroll year.

What's Happening

When CRA reclassifies a worker for a given period, the business can become responsible for the payroll obligations that should have been in place during that period: CPP contributions, EI premiums, and income tax withholding.

The CPP and EI exposure is doubled in a specific way that catches people off guard. In a normal employment relationship, the employer withholds the employee's share and also pays a matching employer share. When CRA reclassifies a contractor after the fact, the business is generally on the hook for both — the portion that should have come off the worker's pay, and the portion the business should have contributed on top of it.

Income tax, CPP, and EI don't necessarily play out the same way. When employment should have been treated as payroll, the consequences can include unpaid CPP and EI obligations, problems with income-tax withholding, and penalties and interest on top of all of it. The exact correction depends on what wasn't deducted or remitted, and the period involved — which is exactly the kind of detail that needs a professional looking at the actual numbers, not a general rule from a blog post.

Penalties and interest can add to the bill. CRA can assess penalties when required CPP, EI, or income tax wasn't deducted, and interest can run from the date an amount was due. CRA sets its prescribed interest rates quarterly, and interest compounds daily — so the longer a misclassification runs before it's caught, the more room that interest has to grow.

The exposure can multiply when several workers are classified the same way. Employment status is determined worker by worker. If several people are working under similar arrangements and those arrangements don't support self-employed status, the business may have more than one classification problem sitting in the same file.

How to Manage This Ongoing

Don't treat a written contractor agreement as protection. A signed agreement establishes intent — it doesn't override how the relationship actually operates day to day. If the facts point to employment, the agreement doesn't change the outcome, and it won't reduce the exposure if CRA reclassifies the relationship.

Reassess relationships that have been running a long time, not just new ones. The longer a contractor relationship continues, the more likely it's drifted from how it started — more hours, more integration into the business, less independence. A relationship that was genuinely a contractor arrangement in year one can look very different by year four.

"Everyone in my industry does it this way" isn't a defence. Employment status depends on the actual working relationship. A common industry practice doesn't override the facts of that relationship.

If you're genuinely unsure about a working relationship, resolve the classification question instead of letting uncertainty carry forward year after year.

To see how CRA makes the call, read employee or independent contractor? How CRA decides. For the slips that go with each classification, see T4 or T4A? Which slip you issue and why it matters.

FAQ

Does CRA reclassification only affect future pay, or does it reach back?
It applies to the period CRA determines the worker was actually in employment — which can be earlier than when CRA makes the determination, and can extend beyond a single payroll year if the relationship ran that long.

Does the business owe the same amounts for income tax as it does for CPP and EI?
Not necessarily — they're assessed differently, and the specifics depend on what wasn't deducted and for how long. That's a calculation worth having a professional walk through rather than estimating on your own.

Is the risk different for a business with just one contractor versus several?
The underlying test is the same for every worker, but a business with multiple people in similar contractor arrangements has more at stake, since employment status gets determined person by person.

Can a business fix a misclassification before CRA catches it?
That's a real option worth discussing with your accountant or bookkeeper — but it's not a do-it-yourself process, and the right approach depends on the specifics of the situation.

Follow the system. File with confidence.