Comparing Business Structures: Sole Proprietor vs Corporation

Comparing Business Structures: Sole Proprietor vs. Corporation

A sole proprietorship is simpler and cheaper; a corporation offers tax deferral, liability protection, and structure for growth. However, it costs more to maintain.

What Is a Sole Proprietorship?

You own the business directly. There’s no separate legal entity. The business and you are the same for legal and tax purposes.

Characteristics of a sole proprietorship:

Startup: Simple to start (just start operating).

Tax Return: No separate tax return (you report on personal taxes).

Ownership: You own all assets and all obligations personally.

Accounting: Simple accounting.

Costs: Low annual costs.

Profit: You withdraw profit directly (and pay personal tax on it).

What Is a Corporation?

A separate legal entity that you own through shares. The corporation has its own name, operates under corporate law, and files its own tax return.

Characteristics of a corporation:

Startup: Formal setup (articles, bylaws, initial filings).

Tax Return: Separate tax return (the corporation files separately).

Liability: Liability generally limited to corporate assets.

Accounting: Formal accounting and record keeping.

Compliance: Annual compliance requirements.

Costs: Higher setup and ongoing costs.

Profit: Profit taxed at corporate rate; personal tax on withdrawals.

How Do They Compare Side by Side?

Startup Cost 
Sole Proprietorship: Minimal (often just a business license). 
Corporation: $500–$1,500 (legal filings and documents).

Annual Compliance 
Sole Proprietorship: Minimal; report profit on personal tax return. 
Corporation: Corporate tax return, annual filing with Alberta Corporate Registry, updated records.

Tax Rate on Retained Profit 
Sole Proprietorship: Personal rate (31–43%+). 
Corporation: Corporate rate (11% for qualifying income under $500k) + personal tax on withdrawals.

Tax Deferral Opportunity 
Sole Proprietorship: None. 
Corporation: Yes (profit retained in corporation).

Personal Liability 
Sole Proprietorship: Unlimited (all business obligations reach personal assets). 
Corporation: Limited (generally to corporate assets).

Exceptions to Limited Liability 
Sole Proprietorship: N/A. 
Corporation: Personal guarantees, professional liability, statutory obligations, personal misconduct.

Ease of Adding Partners 
Sole Proprietorship: Requires partnership agreement; personal liability for partner actions. 
Corporation: Shares to partners; controlled ownership structure; limited liability.

Bringing in Investors 
Sole Proprietorship: Difficult (no formal share mechanism). 
Corporation: Clear share structure; formal ownership stakes.

Separating Personal and Business Finances 
Sole Proprietorship: Flexible; funds can flow freely. 
Corporation: Required; must maintain separate accounts and records.

Ownership Transfer 
Sole Proprietorship: Requires selling assets and business name (discontinuous). 
Corporation: Shares transfer; business continues with new owner.

Continuity After Owner Passes Away 
Sole Proprietorship: Business ends. 
Corporation: Business continues; shares pass to beneficiaries.

Borrowing Capacity 
Sole Proprietorship: Limited; lenders usually require personal credit. 
Corporation: Stronger; lenders assess corporate creditworthiness separately.

Employee Relationships 
Sole Proprietorship: Employer; employer obligations apply. 
Corporation: Corporate employer; formal HR and employment governance.

Complexity 
Sole Proprietorship: Low. 
Corporation: Higher.

When Does a Sole Proprietorship Make Sense?

Keep a sole proprietorship when:

Early Stage: Your business is new, and revenue is still uncertain.

Modest Profit: You earn modest profit and need to withdraw most or all of it personally.

Low Liability: Your work carries minimal liability (advisory services, low-risk services).

No Employees: You have no employees and no plans to add them.

No Partners: You don’t plan to bring in partners or investors.

No Sale Planned: You don’t anticipate selling the business.

Simplicity: Simplicity matters more to you than the potential tax benefit.

Client Requirements: Your clients don’t require incorporated status. 

Examples of when a sole proprietorship often works best include consulting or freelance professional services; solo service businesses (coaching, training, consulting); part-time or side businesses; the initial startup phase (before revenue stabilizes); and low-risk, advisory-only businesses.

The advantages of staying a sole proprietor include simpler accounting and taxes, lower annual costs, a faster start, flexible fund management, no corporate formalities, and an easier wind-down if the business doesn’t work out.

When Does a Corporation Make Sense?

Incorporate if:

Retained Profit: You’re earning meaningful profit you plan to retain in the business.

Tax Rate: Your personal tax rate makes the 11% corporate rate valuable.

Liability: Your work carries genuine liability or debt exposure.

Employees: You plan to hire employees.

Partners and Investors: You expect to bring in partners or investors.

Contracts: You’re targeting larger contracts requiring incorporated status.

Sale or Transfer: You plan to eventually sell the business or transfer ownership.

Continuity: You want the business to continue independently of your involvement.

Examples of when incorporation often makes sense include contractor or service businesses with on-site work (liability exposure); product-based businesses (liability exposure); businesses planning to raise capital or add partners; businesses expecting to hire employees; professional practices (physician, accountant, lawyer); and businesses with plans to sell or transfer.

The advantages of incorporating include tax deferral on retained profit, liability protection (with limits), a formal structure for partners and investors, clearer business continuity, a stronger borrowing position, and a professional structure for growth.

How Do I Switch from a Sole Proprietorship to a Corporation?

If you start as a sole proprietor and decide to incorporate later, here are the steps to expect:

Step 1: Form the corporation (incorporation articles, share issuance, initial filings).

Step 2: Transfer assets from the sole proprietorship to the corporation.

Step 3: Update contracts and registrations with the new corporate entity.

Step 4: File a final personal return for the sole proprietorship (up to the transfer date).

Step 5: Begin corporate tax returns from the transfer date forward.

The transfer has tax implications (you may owe tax on asset appreciation), so coordinate with your accountant. However, it’s common and workable. Many owners start as sole proprietors and incorporate when the business grows.

It’s usually cheaper to incorporate when circumstances favour it rather than trying to optimize a sole proprietorship indefinitely.

How Do I Decide Which Structure Is Right for Me?

Here are some factors to help you decide which option might work best for your specific situation.

Start as a Sole Proprietor If: Your business is new or revenue is unproven; you need simplicity and low costs; or profit is modest and will be fully drawn.

Incorporate When: Revenue and profit stabilize; you retain meaningful profit; liability risk increases; growth plans emerge (partners, capital, employees, sale); or two or more of these signals point in the same direction.

Most owners start simple and formalize as circumstances justify it.

Related Pages

When Should You Incorporate Your Business?: The broader decision framework.

Profit and Tax Considerations: Tax mechanics and deferral.

Liability Protection Through Incorporation: Asset protection tradeoffs.

Growth, Capital, and Partnerships: When structure supports expansion.

Official Sources

Government of Alberta – Start a Business

Government of Alberta – Sole Proprietor vs. Corporation

Canada Revenue Agency – Business Structures

Business Corporations Act (Alberta)

September 2026

Information Note

This page provides general information comparing business structures and their costs. The costs and tax treatment shown are estimates and vary based on your specific accountant, complexity, and circumstances.

Consult your accountant to model the specific financial impact for your business before deciding. Consult a lawyer if you’re bringing in partners or investors to ensure proper documentation.