Window Cleaning Business in Canada: Sole Proprietorship vs Corporation

What to take away

A window cleaning owner in Canada makes the structure choice at the same time they open a CRA program account and buy liability insurance.

The criteria that matter

The comparison turns on five practical criteria: setup and cost, personal liability, tax treatment, annual administration, and GST/HST obligations. Canada's start-up guide sets out the basic incorporation and registration steps for any new business. This page walks through federal and provincial options.

Criteria matrix

Rules, registries and tax rates behind the matrix

A federally incorporated company is governed by the Canada Business Corporations Act. A provincially incorporated company follows its province's statute, such as the Ontario Business Corporations Act or the British Columbia Business Corporations Act. A sole proprietor registers a business name with the province.

The provincial registries are the Ontario Business Registry, BC Registries, the Alberta Corporate Registry through registry agents, and the Registraire des entreprises du Québec. Federal incorporation goes through Corporations Canada.

As of 2026, a Canadian-controlled private corporation pays the federal small business rate of 9% on its first $500,000 of active business income, after the small business deduction, against 15% on the general rate. Each province adds its own rate, so ask your accountant for the combined figure. A sole proprietor pays personal tax at graduated federal and provincial rates, and pays both halves of the Canada Pension Plan on self-employment earnings, at a combined 11.9% of pensionable earnings above the basic exemption. A corporation owner paid by salary and dividends pays the plan's employee and employer shares on salary only.

Sole proprietorship

For a window cleaning business, a sole proprietorship means the owner and the business are one legal person. You register a business name in your province, then report revenue and expenses on Form T2125 of your personal return. This is the lowest-cost option at startup because there are no articles of incorporation.

The trade-off is unlimited personal liability. If a ladder scratches a client's window or a worker drops equipment on a car, the owner's personal savings and home equity can be exposed. Window cleaning runs on ladders, water-fed poles, and exterior access, so this risk is not theoretical. Sole proprietorships fit part-time routes, storefront accounts, and owners who clean alone.

If you hire help, provincial workplace insurance applies regardless of structure. The comparison in WSIB and WorkSafeBC differences explains how to register and what coverage to carry.

Corporation

A corporation is a separate legal person. You file articles of incorporation, either federally through Corporations Canada or provincially. You can verify a proposed federal name through the Corporations Canada search page. This search matters because a window cleaning name that conflicts with another corporation will be rejected.

The main benefit is limited liability. In most provinces, a corporation's debts and court awards stay inside the corporation, unless you give a personal guarantee or are personally negligent. A corporation also pays tax at corporate rates, and you can split income through salary and dividends.

The main costs are ongoing, not just startup. You will file a T2 corporate return every year, keep corporate minutes, and maintain separate bank accounts. For planning, an illustrative range of $400 to $1,500 for basic incorporation in Canada is reasonable, undated and unsourced; provincial registry fees and lawyer-assisted work vary. Check the filing fee on the registry's own page, and ask whether federal or provincial incorporation fits where you will work. That range covers online filing and simple articles.

GST/HST registration

The structure choice does not change GST/HST registration. A sole proprietor and a corporation both register when taxable supplies exceed $30,000 over four consecutive calendar quarters. The details are in GST/HST and CRA registration. Window cleaning services are generally taxable supplies in Canada.

Many small window cleaners register voluntarily to claim input tax credits on equipment and vehicle costs. That choice is independent of sole proprietorship or corporation.

Where each one wins

A sole proprietorship is the right answer for a single owner doing low-risk residential or storefront work, with revenue below the GST/HST threshold and no employees. An owner in Guelph cleaning shop windows part-time will spend less time on filings and keep all after-tax profit.

A corporation is the right answer when a window cleaning business has several employees, high-rise contracts, or revenue that consistently exceeds the GST/HST threshold. Liability protection matters more when you work at height or on commercial properties. The decision to use employees or subcontractors changes payroll and WSIB duties, covered in subcontractor versus employee.

What none of them solve

Neither sole proprietorship nor incorporation removes the need for clear window cleaning contracts. A contract still has to state scope, access, weather, and payment terms. Our guide on contract terms to include sets out the essentials.

The reason is practical. Property managers and strata councils ask for proof of insurance, safety plans, and named clauses before they sign. A corporation limits where a lawsuit can reach, but it does not draft a better scope of work. Owners who skip this step end up arguing over streak-free standards and rain delays.

Some owners assume a corporation removes all insurance duties. That is false. CRA and provincial workplace insurers look through the structure when unpaid premiums or payroll source deductions are owed. Corporate directors can face personal assessment in Canada.

Neither structure removes provincial workplace safety obligations either. In Ontario, Alberta, British Columbia, and Quebec, the rules differ. Ontario workers' compensation runs through WSIB and the Occupational Health and Safety Act, British Columbia through WorkSafeBC, Alberta through the Workers' Compensation Board and Alberta Occupational Health and Safety, and Quebec through the CNESST. A corporation can protect personal assets, but it cannot protect an owner from regulatory fines or personal negligence claims. The licensing check lists the offices to ask.

Common questions