How to Start a Business in Ontario: Complete Legal Guide
Everything entrepreneurs need to know about Ontario business registration, entity selection, tax obligations, and legal compliance. Updated for 2026.
Table of Contents
1. Choose Your Business Structure
Your business structure affects everything: taxes, liability, compliance, and growth potential. Here are your options in Ontario:
Sole Proprietorship
Best for: Simple service businesses, consultants, freelancers
- ✅ Simplest to start
- ✅ Lowest cost ($60-80)
- ✅ Complete control
- ❌ Personal liability
- ❌ No tax advantages
- ❌ Harder to raise capital
Partnership
Best for: 2+ founders, professional services, shared expertise
- ✅ Shared responsibilities
- ✅ Pass-through taxation
- ✅ More capital sources
- ❌ Personal liability
- ❌ Shared profits
- ❌ Partnership disputes
Corporation
Best for: Growth-focused businesses, multiple investors, asset protection
- ✅ Limited liability
- ✅ Tax advantages
- ✅ Easier funding
- ❌ More complex ($200+)
- ❌ Double taxation risk
- ❌ Ongoing compliance
💡 Smart Decision Framework
- Revenue under $50K/year: Sole proprietorship is fine
- Revenue $50K-200K: Consider incorporation for tax benefits
- Revenue over $200K: Corporation almost always better
- High liability risk: Corporation essential (contractors, consultants, products)
- Multiple founders: Corporation or detailed partnership agreement
- Future investment plans: Corporation required
2. Register Your Business
Registration requirements depend on your chosen structure:
Sole Proprietorship Registration
- Business Name Registration: If using a name other than your legal name, register with ServiceOntario ($60)
- Master Business License (MBL): Optional streamlined process for multiple permits ($60 + permit fees)
- Business Number: Get from Canada Revenue Agency (free) for tax accounts
Corporation Registration (Most Common)
- Name Search: NUANS name search through Ontario government ($30)
- Articles of Incorporation: File with ServiceOntario ($300 online, $330 by mail)
- Corporate Records: Maintain minute book with bylaws, resolutions, share certificates
- Business Number: Register for GST/HST, payroll, corporate tax accounts
🏃♂️ Fast Track: AI-Assisted Registration
Our AI tools can draft your Articles of Incorporation, create corporate bylaws, and handle all registration paperwork in 24-48 hours. Skip the weeks of back-and-forth with government offices.
Get AI-Powered Registration →3. Get Required Licenses & Permits
Most businesses need multiple permits. Here's what to check:
Federal Licenses (rare but critical)
- Federally regulated industries: Banking, telecommunications, broadcasting
- Import/export permits: For international trade
- Patents & trademarks: Intellectual property protection
Provincial Licenses (Ontario)
- Professional licenses: Law, medicine, engineering, architecture
- Industry-specific: Construction, food service, childcare
- Liquor licenses: Restaurants, bars, retail
Municipal Permits (city/town)
- Business license: Required by most municipalities ($50-500)
- Zoning compliance: Home businesses, commercial locations
- Building permits: Renovations, signage, accessibility
Sector-Specific Examples
- Food business: Health permit, food handler's license
- Contractor: WSIB registration, trade licenses
- Retail: Fire safety permit, accessibility compliance
⚠️ Permit Traps That Kill Startups
- Operating without permits: Fines, shutdown orders, criminal charges in some sectors
- Home business zoning: Neighbors can complain and shut you down
- Workers without WSIB: Personal liability for workplace injuries
- Food safety violations: Public health can close you immediately
4. Set Up Tax Obligations
Get your tax accounts set up properly from day one:
HST/GST Registration
Required if: Annual revenue will exceed $30,000
Optional if: Under $30K but you want to claim input tax credits
Process: Register online with CRA using your business number
Timeline: Must register within 30 days of exceeding threshold
Corporate Tax Account
For corporations: separate tax account required, 15.5% small business rate in Ontario (2026)
Payroll Account
Required as soon as you have employees or pay yourself a salary from a corporation
💰 Tax Strategy Tip
Income Sprinkling: Pay yourself a reasonable salary ($40-60K) and take remaining profits as dividends. This can save $5,000-15,000 annually compared to salary-only compensation.
5. Protect Yourself Legally
Don't wait for problems—set up protection from day one:
Essential Legal Documents
Client-Facing
- Terms of Service: Website/app legal terms
- Privacy Policy: Required by PIPEDA
- Service Agreements: Project scope, payment terms
- Refund/Cancellation Policy: Clear customer expectations
Internal Operations
- Employment Agreements: All staff need contracts
- Contractor Agreements: Freelancers, consultants
- NDA Templates: Protect confidential information
- Partnership/Shareholder Agreements: Multi-founder businesses
Insurance Requirements
- General Liability: $2M minimum for most businesses
- Professional Liability: Essential for consultants, advisors
- Directors & Officers: Protects corporate decision-makers
- Cyber Liability: Critical if you handle customer data
Intellectual Property Protection
- Trademark your business name: $330-530 + legal fees
- Patent valuable innovations: $1,500-5,000+ per patent
- Copyright key content: Automatic in Canada, register for enforcement
- Trade secret protection: NDAs, employee agreements
6. Ongoing Compliance Requirements
Stay compliant with these recurring obligations:
Annual Requirements
- Corporate Annual Return: Due each year on incorporation anniversary
- Tax Returns: Personal, corporate, HST as applicable
- WSIB Annual Reporting: If you have employees
- License Renewals: Most permits require annual renewal
Quarterly/Monthly
- HST Returns: Quarterly or monthly depending on revenue
- Payroll Remittances: Monthly if paying employees
- Corporate Minute Book: Update with major decisions
- Financial Statements: Track for tax and compliance
7. Costs & Timeline
Realistic budget and timeline for Ontario business setup:
Sole Proprietorship
Government Fees: $60-140
Legal Documents: $300-800
Insurance: $300-1,200/year
Total Setup: $600-2,100
Timeline: 1-2 weeks
Partnership
Government Fees: $60-140
Partnership Agreement: $1,500-3,000
Insurance: $500-2,000/year
Total Setup: $2,000-5,000
Timeline: 2-4 weeks
Corporation
Government Fees: $330-430
Legal Setup: $1,500-4,000
Insurance: $800-3,000/year
Total Setup: $2,500-7,500
Timeline: 2-6 weeks
8. Common Mistakes That Kill Startups
Avoid these expensive errors:
❌ Wrong Business Structure
Choosing sole proprietorship for a high-liability business, or incorporating too early and paying unnecessary taxes. This costs $2,000-10,000+ to fix later.
❌ No Partnership Agreement
50% of partnerships end in disputes within 5 years. Without a detailed agreement, this means expensive litigation and business destruction. Cost to fix: $10,000-50,000+ in legal fees.
❌ DIY Legal Documents
Generic templates from LegalZoom don't comply with Ontario law. When they fail, you're personally liable. One lawsuit costs more than proper legal setup.
❌ Ignoring HST Obligations
CRA can assess up to 4 years of back HST plus penalties and interest (25%+ per year). This has bankrupted profitable businesses.
❌ Operating Without Permits
Municipal shutdown orders can happen overnight. Some sectors (food, construction, childcare) face criminal charges. Always check permit requirements before opening.
Ready to Start Your Ontario Business?
Starting a business has enough challenges without legal headaches. Our AI-powered startup packages handle all the paperwork, compliance, and legal protection so you can focus on building your business.
✅ Our Startup Package Includes:
- • Business structure consultation & recommendation
- • Complete incorporation or registration filing
- • All required corporate documents (bylaws, minute book)
- • Business number registration (HST, payroll, corporate tax)
- • Legal document templates (contracts, NDAs, employment agreements)
- • Compliance calendar with all deadlines
- • 1-hour strategy consultation with Ontario business lawyer
⚡ Why Choose AI-Powered Setup?
- • 50% faster: 1-2 weeks vs. 4-8 weeks with traditional firms
- • 60% less expensive: $2,500 vs. $4,000-7,000 traditional cost
- • Zero errors: AI catches compliance issues humans miss
- • Always current: Automatically updated for law changes
- • Ontario-specific: Tailored for provincial requirements
Legal Disclaimer
This guide provides general information about starting a business in Ontario and should not be considered legal advice. Business requirements vary by industry, municipality, and specific circumstances. Laws and regulations change frequently. Always consult with a qualified Ontario business lawyer before making important business decisions. Mithril Law provides this information for educational purposes and does not create a solicitor-client relationship through this guide.
Last updated: February 2026. Information reflects current Ontario and federal requirements as of publication date.