Sole Proprietorship for Contractors in Canada

A contractor sole proprietorship is the simplest way to work for yourself in Canada: you are the business. You register a business name only if you operate under a name other than your own legal name, you report contracting income on your personal T1 return using form T2125, and you remain personally responsible for the debts and obligations of the business. For most self-employed contractors starting out today, it is the default structure.

What counts as contracting in Canada

The term contractor covers a wide range of work: construction and renovation trades, drywall, electrical and plumbing subcontracting, IT and software contracting, project management, and consulting-style engagements billed by the hour or the job. If you take on work for multiple clients, control how and when the work is done, supply your own tools, and carry the risk of loss on a job, you are generally operating as a self-employed contractor rather than an employee.

That distinction matters because it drives how you are paid and taxed. CRA looks at factors such as control, ownership of tools, the chance of profit or loss, and whether you can work for others. If the facts point to employee status, the payer should be withholding and remitting payroll deductions. When in doubt, review CRA's guidance on employee or self-employed status and confirm your situation with a qualified accountant.

Registering a contractor business in Canada

Many contractors begin with no formal registration at all — they simply invoice under their own legal name. Registration generally becomes necessary when you want a business or trade name, when a client or general contractor requires it, or when your province or territory requires a licence to operate.

• Business name registration — handled through your provincial or territorial registry; requirements and fees vary, so confirm with your province.
• Business Number (BN) — a CRA identifier for your business accounts. A BN alone is not a licence, however; see is a sole proprietorship a business licence?
• GST/HST account — you must register once revenue exceeds the small-supplier threshold; the current amount is on the CRA website.
• Payroll account — needed if you hire employees and must deduct CPP, EI, and income tax.

Not sure whether you need to register at all? Review do I need to register a sole proprietorship? and what is a sole proprietorship?

Contractor taxes: T2125, CPP, and GST/HST

As a self-employed contractor, you do not have an employer withholding tax from your paycheques. Instead, you file form T2125 with your T1 return, reporting gross contracting revenue, business expenses, and net income. You pay income tax on that net amount and contribute to CPP on net self-employed earnings — both the employee and employer portions. If you are registered for GST/HST, you collect it from clients and remit it, usually through CRA My Business Account.

Obligation	What it covers	Where it happens
Income tax	Net contracting income	T1 return with form T2125
CPP	Contributions on net self-employed earnings	Calculated on the T1 return
GST/HST	Tax collected on taxable supplies	CRA My Business Account
Payroll deductions	CPP, EI, and income tax for employees	CRA payroll account
Instalments	Quarterly prepayment of tax	Only if CRA asks you to pay

Set aside a percentage of every payment for tax, and keep job-by-job records of materials, fuel, tools, and subcontractor costs.

Employees, subcontractors, and T4A slips

Growing contractors often hire help. A sole proprietorship can have employees, which means registering a payroll account, deducting and remitting source deductions, and issuing T4 slips. If you engage other contractors instead, they invoice you and control their own taxes — but CRA may still expect a T4A slip for fees paid for services in certain situations, so confirm the current filing rules. See can a sole proprietorship have employees in Canada?

Licences, insurance, and personal liability

Contracting often carries real-world risk: property damage, injuries on site, defective work, and unpaid invoices. Requirements vary by province, territory, and municipality, and may include a trade licence, municipal business licence, and coverage through the provincial workers' compensation board. Commercial general liability insurance is standard for site work, and errors and omissions coverage is common for design or consulting contractors.

Because a sole proprietorship is not a separate legal entity, you are personally on the hook for business debts and judgments. Read sole proprietorship liability before taking on large contracts, and compare structures in sole proprietorship vs corporation.

Invoices, records, and when to incorporate

Your invoices should show your legal or registered business name, contact details, the date, a description of the work, the amount, and your BN or GST/HST number if you are registered. Keep contracts, invoices, receipts, bank statements, and vehicle logs; CRA generally expects records to be kept for six years after the end of the last tax year they relate to, but confirm the current requirement.

Invoicing a general contractor who pays slowly is a cash-flow reality for many self-employed contractors, so track receivables and consider deposits on larger jobs. As profit grows, incorporation can offer tax deferral and limited liability — but it adds filing costs and payroll obligations. This page is general information, not legal or tax advice.