How to pay an independent contractor in Canada (without triggering a CRA audit)

Paying an independent contractor feels simple: agree on a rate, do the work, send payment. Done.

Except it’s not. In Canada, how you pay contractors, what you document, how you classify the working relationship and whether you’re issuing the right tax slips all sit firmly in the CRA’s line of sight. Get it wrong and you’re not just looking at an awkward conversation. You’re looking at statutory reassessments, retroactive CPP and EI liabilities, interest and penalties that can stretch years into the past.

This guide cuts through the noise so you can pay contractors confidently and cleanly.

Why contractor payments carry real audit risk

The CRA doesn’t take your word for it when you say someone’s a contractor.

They examine the actual reality of the working relationship using a multi-factor test:

Control: How much control do you have over how, when, and where the work gets done?

Ownership of tools/equipment: Does the worker supply their own tools and equipment?

Subcontracting / Chance of profit and risk of loss: Does the worker operate a distinct business with financial risk and the ability to hire others?

Integration: Is the worker’s service an integral part of your business, or are they operating independently?

If the facts don’t line up with the “independent contractor” label, the CRA can reclassify the worker as an employee. When that happens, your business becomes liable for both the employer and employee portions of unremitted CPP/CPP2 and EI premiums, plus interest and administrative penalties.

And it’s not a hypothetical risk. Worker misclassification is one of the most common payroll compliance issues the CRA investigates, particularly in industries relying on project-based, seasonal, or piece work.

Common tripping points beyond classification:

• Failing to issue T4A slips when required
• Paying invoices without verifying the contractor’s Business Number (BN) or GST/HST registration status
• Incorrectly handling sales tax (e.g. including sales tax in T4A box 048 reporting)
• Weak payment records and missing invoices that can’t survive a CRA audit

Most of these mistakes are entirely avoidable. That’s exactly what this guide is for.

What’s inside the guide

We built this resource for Canadian employers, founders, finance leads and HR operators who are working with contractors and want to get the process right from the start.

Inside, you’ll find:

• CRA worker classification: The legal factors (control, tools, financial risk) used by the CRA to test employee vs. contractor status.
• Invoicing and tax standards: Mandatory invoice details (BN/GST numbers) and the paper trails needed for audits.
• Sales tax rules (GST/HST): When contractors need to charge GST/HST, when you need to collect it and how to handle payments correctly
• T4A filing obligations—when you’re required to issue a T4A, what to report in Box 048 and Box 020 and the $500 threshold rule
• Best practice: Essential payment records to retain and the CRA’s mandatory 6-year document retention rule.
• Audit red flags: Operational patterns that trigger CRA scrutiny and how to resolve them before an audit.
• Contractor onboarding checklist: A step-by-step framework to verify status, collect tax IDs, and run compliant payouts.

Who is this guide for? 

If any of the following sounds familiar, this guide is for you:

• You pay contractors regularly but haven’t formalized an onboarding or invoicing workflow.
• You’re unsure when GST/HST applies or how to report contractor payments on a T4A (excluding sales tax).
• You engage contractors in ways that might look like traditional employment to an outside auditor (e.g., managing their daily schedule or providing company laptops).
• You’re scaling your business and want a repeatable, low-risk contractor management process.
• You want to understand the true financial exposure of a CRA misclassification ruling before an audit happens.

You don’t need to be a tax expert to use this guide. You just need to be the person who’s responsible for getting it right.

What you’ll walk away knowing

After reading this guide, you’ll be able to:

• Assess worker status using the CRA’s legal criteria before signing a contract.
• Set up a defensible invoicing and payment record workflow.
• Manage GST/HST obligations correctly on all contractor payouts.
• Accurately complete and file T4A slips by the end of February.
• Identify and resolve CRA audit triggers before they lead to penalties.
• Build an automated, scalable contractor payment process.

Managing contractor payments just got easier

Running a clean contractor payment process takes structure. And as your contractor workforce grows, that structure needs to scale with it.

Employment Hero is dedicated to making it easier for Canadian businesses helping you onboard contractors, collect tax credentials upfront, manage payouts, and generate T4As automatically. This guide gives you the foundational knowledge you need to stay compliant year-round.

Get the guide

Stop winging contractor payments and start doing them right.

Download How to pay an independent contractor in Canada (without triggering a CRA audit) and get the practical, CRA-aligned guidance your business needs.