Mississauga is one of the best places in Ontario to start a business. You’re close to Pearson Airport, major highways and a huge customer base across the GTA. But with that opportunity comes a long list of legal details that are easy to overlook in the excitement of launching. We’ve put together a practical walk-through of what most new Mississauga businesses need to think about in 2026.
Pick the right structure
Your first decision is how to set up the business. A sole proprietorship is simple and cheap but leaves your personal assets exposed. A partnership shares that exposure between partners. A corporation is a separate legal person, which generally protects your personal assets and can offer tax advantages as profits grow. Speak with your accountant and a lawyer before you decide, because changing structures later can be costly.
If you incorporate, you’ll need to choose between Ontario and federal incorporation, set up a proper share structure, and keep a minute book with bylaws, resolutions and the required registers. These records are what prove the company was set up correctly if you ever raise money, sell or face a dispute.
Protect your name and brand
Registering a business or corporate name isn’t the same as owning it. Before you spend money on signage and a website, check that your name doesn’t infringe someone else’s trademark, and consider registering your own. It’s much cheaper to choose a safe name now than to rebrand after a demand letter.
Put agreements in writing
If you have a co-founder or partner, a shareholder or partnership agreement should be at the top of your list. It decides who controls the business, how decisions are made and what happens if someone wants out.
You’ll also need solid terms with customers and suppliers. Clear payment terms, limits on liability and a dispute resolution process can protect your cash flow and save you from expensive arguments later.
Review your lease carefully
Commercial leases in Mississauga can run five or ten years and often include personal guarantees, rent escalations, operating costs and restrictions on how you use the space. They’re usually drafted in the landlord’s favour, and many terms are negotiable. Have a lawyer review the offer to lease before you sign, because that document often locks in the key terms.
Licences, permits and taxes
Depending on your industry, you may need a business licence from the City of Mississauga, zoning approval for your location, or provincial permits. You’ll also need to register with the Canada Revenue Agency for the accounts that apply to you, and register for HST once your revenue passes $30,000 in four consecutive quarters.
When you hire your first employee
The moment you hire, Ontario’s Employment Standards Act applies. Written employment contracts with carefully drafted termination clauses are essential. Depending on your size, you may also need written policies, such as a workplace harassment policy under occupational health and safety law. Our Mississauga employment lawyers can set these up for you.
Start with the right support
You don’t have to tackle this list alone. Our Mississauga business lawyers help new companies with incorporation, shareholder agreements, contracts and leases, backed by our corporate law and commercial teams. For ongoing help as you grow, ask about our legal support for small and medium businesses.
