Sole Proprietor vs. Incorporated Clinic

The Short Answer

The choice between sole proprietorship and incorporation for a wellness clinic is fundamentally a tax math question. Sole proprietors pay personal tax on every dollar earned. An incorporated clinic can retain surplus earnings in the corporation at the lower corporate rate and pays personal tax only when money is drawn out. Which structure fits depends on individual circumstances.

The Full Explanation

Sole Proprietorship: How It Works

As a sole proprietor, you and your business are the same legal entity for tax purposes. All clinic revenue flows to your T1 personal return on Schedule T2125 (Business or Professional Income). Your net practice income — after deducting legitimate business expenses — is added to any other personal income and taxed at your marginal rate.

For 2026, the federal brackets begin at 14% on taxable income up to $58,523 and rise to 33% above $258,482. Ontario’s provincial brackets begin at 5.05% up to $53,891 and rise to 13.16% above $220,000. Ontario health premium and surtax calculations affect the actual combined result, so simply adding a federal and provincial bracket rate does not produce a complete tax estimate. The top combined Ontario marginal rate remains 53.53% in 2026.

A chiropractor netting $160,000 from their practice pays personal tax at marginal rates — a large portion at 43–53%.

Advantages of sole proprietorship:

• Simple — one T1 return, no corporate filings
• Lower accounting costs
• Losses can offset other personal income
• No regulatory college approval required for business structure
• RRSP contributions generate earned income

Disadvantages:

• No tax deferral — all income is taxable at personal rates in the year earned

Professional Corporation: How It Works

An incorporated wellness clinic is a separate legal entity. The corporation earns income, pays the corporate small business rate (about 11.2% in Ontario since July 1, 2026) on the first $500,000 of active business income, and retains the after-tax amount.

The owner-practitioner then draws personal income from the corporation as needed — by salary, dividends, or both — and pays personal tax on those draws.

The difference comes from the deferral on retained earnings: amounts left in the corporation are taxed at the corporate rate rather than at the owner’s personal marginal rate, and personal tax applies only when those amounts are later withdrawn.

Features of a professional corporation:

• Tax deferral on earnings retained in the corporation
• Lifetime Capital Gains Exemption may apply on an eventual sale of shares (if QSBC conditions are met)
• Passive investment inside the corporation using pre-personal-tax dollars
• Creditor protection for business debts (not professional negligence)

Disadvantages:

• Additional accounting fees ($3,000–$7,000+ per year)
• Regulatory college approval required
• More complex bookkeeping (payroll, shareholder loans, dividend declarations)
• Dividends don’t create RRSP contribution room

Side-by-Side Comparison

Factor	Sole Proprietor	Professional Corporation
Tax on retained income	Personal rate (up to 53.53%)	Small business rate (~11.2%)
Annual accounting cost	$1,000–$2,500	$3,500–$7,500+
RRSP contribution room	Yes (on all net income)	Only on salary portion
CPP contributions	Yes (both shares)	Only on salary portion
Capital gains exemption	No	Potentially yes (QSBC)
Regulatory requirement	None	College approval required
Liability protection	None	Limited (not professional negligence)

The Cost of Each Structure

Sole proprietorship has lower ongoing cost — a single personal return and simpler bookkeeping. A professional corporation adds an annual T2 corporate return, corporate bookkeeping (payroll, shareholder loans, dividend declarations), college approval, and typically $3,000–$7,000+ in additional annual accounting and legal cost.

What This Means for Your Clinic

There is no universal right answer. The appropriate structure depends on individual income, financial obligations, and goals, and is best determined with a CPA who can model your specific numbers.

Wellspring Accounting works with both sole proprietors and incorporated clinics across Ontario. See our services for chiropractors, physiotherapists, and massage therapists, or read how incorporation works for wellness clinics.