Table of Contents
- ๐ 1. What Is Investment Income in a Corporation?
- โ๏ธ 2. Investment Income vs Business Income
- ๐ 3. Types of Investment Income (Real Examples)
- ๐งฉ 4. Why Investment Income Tax Is Complex
- ๐ 5. Corporate Investment Income Tax Rates
- ๐ 6. Example: Interest Income (Corporate vs Personal)
- ๐ 7. Capital Gains in a Corporation
- ๐งพ 8. Dividend Income in a Corporation
- ๐ข 9. Connected vs Portfolio Dividends
- ๐ฐ 10. RDTOH (Refundable Tax Explained)
- ๐ข 11. How Refundable Tax Is Calculated
- ๐ป 12. Flow Through Example (Tax Software View)
- ๐ป 13. Dividend Income Flow (Part IV Tax Example)
- ๐ธ 14. Paying Dividends and Tax Impact
- ๐งพ 15. NERDTOH vs ERDTOH (New Rules)
- ๐ 16. Full Flow Example (Putting It All Together)
- ๐ฆ Final Takeaway
- ๐ Final Insight
๐ 1. What Is Investment Income in a Corporation?
When a corporation earns money without actively running a business, it is called investment (passive) income.
๐ก Common Examples
- Interest from savings or GICs
- Dividends from stocks
- Capital gains from selling investments
- Rental income from properties
๐ง Simple Rule
If money is earned from investments, not operations โ it is investment income
โ๏ธ 2. Investment Income vs Business Income
Not all corporate income is taxed the same.
๐ Key Difference
| Type | Source | Tax Rate |
|---|---|---|
| Active Business Income | Running a business | ~12% |
| Investment Income | Passive investments | ~50% |
๐ก Why Higher Tax?
To prevent people from:
- Moving investments into corporations
- Paying lower tax
- Deferring personal tax
๐ 3. Types of Investment Income (Real Examples)
๐ฐ Interest Income
- Bank accounts
- GICs
- Bonds
๐ Dividend Income
- Stocks
- Mutual funds
๐น Capital Gains
- Selling investments at profit
๐ Rental Income
- Owning property and collecting rent
๐ Key Insight
Most small corporations earn:
- Interest
- Dividends
- Capital gains
๐งฉ 4. Why Investment Income Tax Is Complex
The system is complex because it tries to ensure:
๐ You donโt pay less tax just because you used a corporation
โ๏ธ Moving Parts
- High corporate tax
- Refundable taxes
- Dividend rules
- Personal tax
๐ง Think of It Like a System
All parts work together to ensure fair taxation (integration)
๐ 5. Corporate Investment Income Tax Rates
๐ Typical Rates
| Level | Rate |
|---|---|
| Federal | ~38.67% |
| Provincial | ~11%โ15% |
| Total | ~50%โ55% |
๐ก Example
Income: $10,000
Tax: ~$5,000
โ ๏ธ Important
This high rate is intentional, not a mistake
๐ 6. Example: Interest Income (Corporate vs Personal)
๐ข Corporation
| Item | Amount |
|---|---|
| Income | $10,000 |
| Tax (~50%) | $5,000 |
| Remaining | $5,000 |
๐ค Personal
| Item | Amount |
|---|---|
| Income | $10,000 |
| Tax (~30โ50%) | ~$3,000โ$5,000 |
๐ก Insight
At first glance, corporate tax looks worseโฆ but wait ๐
๐ 7. Capital Gains in a Corporation
๐ Special Rule
Only 50% of capital gain is taxable
๐ Example
| Item | Amount |
|---|---|
| Gain | $10,000 |
| Taxable | $5,000 |
| Tax (~50%) | ~$2,500 |
๐ก Effective Tax
๐ About 25% on full gain
๐งพ 8. Dividend Income in a Corporation
๐ Key Concept
Dividends received from Canadian corporations often:
โ Are NOT taxed again
๐ก Why?
Because tax was already paid at source
๐ง Goal
Avoid double taxation
๐ข 9. Connected vs Portfolio Dividends
๐ Comparison
| Type | Ownership | Tax |
|---|---|---|
| Connected | >10% | Tax-free |
| Portfolio | <10% | Part IV tax |
๐ก Example
- Own 80% โ no tax
- Own 5% โ Part IV tax applies
๐ฐ 10. RDTOH (Refundable Tax Explained)
This is the core concept.
๐ก What Is RDTOH?
A tracking account for refundable tax
๐ How It Works
- Corporation pays high tax
- Part of tax goes into RDTOH
- Refund happens when dividends are paid
๐ข 11. How Refundable Tax Is Calculated
๐ Example
| Item | Amount |
|---|---|
| Income | $10,000 |
| Total tax | $5,017 |
| Refundable portion | $3,067 |
| Final tax | $1,950 |
๐ก Final Effective Tax
๐ Around 19.5% after refund
๐ป 12. Flow Through Example (Tax Software View)
๐งพ Step-by-Step
- Enter income in Schedule 125
- Identify investment income in Schedule 7
- Apply correct tax rates
โ ๏ธ Mistake to Avoid
If not classified properly:
๐ Tax may be calculated at 12% instead of 50% (wrong)
๐ป 13. Dividend Income Flow (Part IV Tax Example)
๐ Example
| Item | Amount |
|---|---|
| Dividend received | $10,000 |
| Part IV tax | ~$3,800 |
๐ก Important
This tax is fully refundable later
๐ธ 14. Paying Dividends and Tax Impact
๐ What Happens
- Corporation pays dividend
- Refund is triggered
- Shareholder pays personal tax
๐ Flow
| Step | Result |
|---|---|
| High tax paid | Initially |
| Dividend paid | Refund triggered |
| Personal tax | Final stage |
๐งพ 15. NERDTOH vs ERDTOH (New Rules)
๐ Two Pools
| Pool | Purpose |
|---|---|
| NERDTOH | Non-eligible dividends |
| ERDTOH | Eligible dividends |
โ ๏ธ Why This Matters
You must:
- Pay correct type of dividend
- To unlock refund
๐ 16. Full Flow Example (Putting It All Together)
๐ Example
Income: $10,000
| Step | Amount |
|---|---|
| Corporate tax | ~$5,000 |
| Refund later | ~$3,000 |
| Final corporate tax | ~$2,000 |
๐ก Final Flow
- Earn investment income
- Pay high tax
- Pay dividend
- Get refund
- Shareholder pays tax
๐ฆ Final Takeaway
๐ง What You Must Understand
- Investment income is taxed differently from business income
- High tax upfront is intentional
- Refund system ensures fairness
- RDTOH is key to understanding refunds
- Dividends unlock refunds
๐ Final Insight
The system is not designed to reduce tax
It is designed to balance corporate and personal taxation

