Incorporation: Small Business Tax Guide
Tax Deferral, Not Elimination
Incorporation provides tax deferral when you can leave money in the corporation. The low small business tax rate (~12%) lets you grow investments faster. But when you take money out, integration means similar total tax to being unincorporated.
Corporate Tax Rates
Small Business Deduction (SBD)
For Canadian-controlled private corporations (CCPCs):
- Federal rate: 9% on first $500,000 of active business income
- Provincial rates: Vary from 0% (Manitoba) to 4% (PEI)
- Combined rate: Approximately 9-12% depending on province
General Corporate Rate
Income above $500,000 or passive income:
- Federal: 15%
- Combined: 23-31% depending on province
Investment Income
- High rate: ~50% on passive investment income
- Refundable portion when dividends paid out
- Complex rules—doesn't benefit from SBD
When Incorporation Makes Sense
Good Candidates
- High income: Earning more than you spend personally
- Can defer income: Don't need all earnings for living
- Business risk: Want liability protection
- Income splitting: Family members can be shareholders
- Selling business: Lifetime capital gains exemption
Poor Candidates
- Need all income: Personal expenses equal business income
- Low income: Already in low tax bracket
- Simple situation: Admin costs outweigh benefits
- Personal services business: Doesn't qualify for SBD
Rule of Thumb: Incorporation typically makes sense when you can leave at least $50,000/year in the corporation after paying yourself a reasonable salary.
Salary vs. Dividends
Salary (T4 Income)
Advantages:
- Creates RRSP contribution room
- Contributes to CPP (pension benefits)
- Deductible to corporation
- Childcare expense deduction eligibility
Disadvantages:
- Payroll taxes (employer CPP portion)
- Requires payroll administration
- Higher personal tax rate
Dividends
Advantages:
- No payroll taxes
- Flexible timing
- Simpler administration
- Tax credit system (gross-up and dividend tax credit)
Disadvantages:
- No RRSP room created
- No CPP contributions
- Not deductible to corporation
Optimal Mix
Most owner-managers use a combination:
- Salary to max out RRSP room (~$175,000 for full room)
- Dividends for additional income needs
- Leave excess in corporation for tax deferral
Integration Concept
The Canadian tax system aims for "integration"—total tax should be similar whether you:
- Earn income personally, OR
- Earn through corporation and pay yourself
In practice, integration is imperfect, creating planning opportunities.
Lifetime Capital Gains Exemption (LCGE)
When selling qualified small business corporation (QSBC) shares:
- 2024 exemption: ~$1,016,836 per shareholder
- Multiple family shareholders can each use their exemption
- Requires meeting "all or substantially all" asset tests
- 24-month holding period before sale
Qualifying Criteria
- CCPC at time of sale
- 90%+ of assets used in active business (at sale)
- 50%+ test during 24 months before sale
- Shares held for at least 24 months
Income Splitting Opportunities
Family Shareholders
- Spouse and adult children can hold shares
- Pay dividends to shareholders in lower brackets
- Each uses their LCGE on sale
Tax on Split Income (TOSI)
Significant restrictions since 2018:
- Dividends to minors taxed at top rate
- Adults must meet "excluded" tests
- Must work 20+ hours/week in business, OR
- Own 10%+ of shares and business pays <90% to related
- Complex rules—professional advice essential
Costs of Incorporation
Setup Costs
- Legal fees: $1,000-$3,000
- Provincial registration: $200-$400
- Corporate minute book: $200-$500
Ongoing Costs
- Corporate tax return: $1,500-$5,000+/year
- Annual return filings: $50-$100
- Bookkeeping: $200-$500/month
- Payroll (if salary): Additional costs
Personal Services Business (PSB)
A corporation may be a PSB if:
- Would be employee if not for corporation
- Fewer than 5 full-time employees
- Main client controls work performed
PSB Consequences
- No small business deduction
- Limited expense deductions
- Tax rate ~44% (no benefit vs. personal)
- Common issue for IT contractors
Professional Corporations
Doctors, lawyers, accountants, dentists can incorporate:
- Same SBD benefits
- Provincial rules vary on who can be shareholders
- Many provinces restrict family ownership
- Still provides tax deferral on retained earnings
Corporate Year-End Planning
Choosing Year-End
- Can be any date, not just December 31
- Consider timing of income and expenses
- Allows bonus accrual planning
- Coordinate with personal tax situation
Bonus Accrual
- Declare bonus by corporate year-end
- Must pay within 180 days
- Deductible to corp in year declared
- Taxable to you when received
Investment Holding in Corporation
Passive Investment Income
- Taxed at ~50% in corporation
- Refundable when dividends paid
- SBD grind: Passive income over $50K reduces SBD
SBD Grind
- Every $1 of passive income over $50,000 reduces SBD room by $5
- $150,000 passive income = no SBD
- Consider corporate class funds or holding companies
Common Mistakes
- Incorporating too early: Before income justifies costs
- Not paying reasonable salary: RRSP room lost forever
- PSB rules: Not structuring to avoid PSB status
- Mixing personal and business: Creates taxable benefits
- Ignoring integration: Thinking corporate rate is final rate
Steps to Incorporate
- Consult accountant to confirm benefits
- Choose federal vs. provincial incorporation
- Select corporation name (or numbered)
- Prepare articles of incorporation
- Create shareholders' agreement (if multiple)
- Set up corporate bank account
- Register for GST/HST if required
- Transfer assets to corporation
- Set up payroll (if paying salary)
Questions About Incorporation?
Our AI tax assistant can help answer specific questions about small business corporation strategies.
Ask the Tax AssistantDisclaimer: Incorporation involves complex tax and legal considerations. This guide provides general information. Always consult a tax professional and lawyer before incorporating.