How does refundable tax work for CCPCs with investment income in Canada?
Canadian-Controlled Private Corporations (CCPCs) pay a high combined tax rate (around 50%) on investment income, but receive a refundable tax account (RDTOH) that is paid back to the corporation when dividends are distributed to shareholders. This mechanism prevents corporations from using the tax system to shelter passive income at the low small business tax rate.
Detailed Explanation
Investment income earned inside a Canadian corporation is deliberately taxed at a high rate. The refundable tax mechanism is the key to understanding why — and how to plan around it.
Why investment income is taxed differently
Suppose a CCPC earns $100,000 in active business income. At the 9% SBD rate, it pays $9,000 in federal tax and retains $91,000. If that $91,000 were invested to earn more passive income, the corporation would have a competitive advantage over an individual investor, who must first pay personal tax before investing. To neutralise this advantage, investment income earned inside a CCPC is taxed at approximately 50%. However, a portion of this high tax is refundable — the corporation gets it back when it pays dividends to the shareholder.
Refundable Dividend Tax on Hand (RDTOH)
RDTOH tracks the refundable portion of corporate tax paid on investment income and eligible dividends received. There are now two RDTOH accounts:
- Eligible RDTOH: arises from Part IV tax paid on eligible dividends received from non-connected corporations. When eligible dividends are paid to shareholders, $38.33 of refund is generated per $100 of eligible dividends paid.
- Non-eligible RDTOH: arises from refundable Part I tax on investment income. When non-eligible dividends are paid to shareholders, $38.33 per $100 of non-eligible dividends paid is refunded. The refund rate of $38.33 per $100 in dividends paid is known as the dividend refund rule.
Part IV tax on dividends received
When a CCPC receives eligible dividends from a Canadian public company or a non-connected corporation, it pays Part IV tax at 38.33% on those dividends. This Part IV tax goes into the eligible RDTOH account and is refunded when the CCPC pays eligible dividends to its shareholders.
Investment income tax calculation in a CCPC
For investment income (interest, foreign dividends, rental income, and taxable capital gains): - Federal tax: 38.67% (regular Part I tax plus 10.67% refundable additional tax) - The 10.67% refundable additional tax goes into the non-eligible RDTOH account - Combined with provincial tax, the total tax rate is approximately 50% in most provinces
The $50,000 passive income SBD grind-down
Since 2018, earning significant passive investment income inside your CCPC has a second cost beyond the high tax rate: it reduces your Small Business Deduction limit.
If your CCPC (and its associated corporations) earned more than $50,000 in adjusted aggregate investment income (AAII) in the prior year: - The $500,000 SBD limit is reduced by $5 for every $1 of AAII above $50,000 - At $150,000 AAII: the full $500,000 SBD is eliminated
AAII includes: interest income, rental income, taxable capital gains on passive investments, foreign income, and income from property. It excludes: dividends from connected Canadian corporations, active business income, and capital gains from the sale of active business assets.
Capital Dividend Account (CDA)
When a CCPC realises capital gains, 50% of the gain is included in taxable income (taxable capital gain). The other 50% (the non-taxable portion) flows into the Capital Dividend Account (CDA). The CDA can be paid to shareholders as a capital dividend, which is received completely tax-free in the hands of the shareholder. Capital dividends are invisible to the CRA in the shareholder's hands — a significant tax-free extraction mechanism for capital gains realised inside the corporation.
The capital dividend election (Form T2054) must be filed before or at the time the dividend is paid. It cannot be filed retroactively.
Source: https://www.canada.ca/en/revenue-agency/services/tax/businesses/topics/corporations/corporation-tax-rates/refundable-taxes.html
Real-World Examples
CCPC with $100,000 in interest income triggering RDTOH
A CCPC earns $100,000 in interest income from a corporate savings account. Federal tax: 38.67% = $38,670. Of this, the refundable portion ($10,667) goes into the non-eligible RDTOH account. When the corporation later pays $27,785 in non-eligible dividends to the shareholder, it receives a $38.33 refund per $100 of dividends = approximately $10,655 RDTOH refund. The shareholder pays personal tax on the grossed-up dividend, claiming the DTC.
Passive income grind eroding the SBD
A BC CCPC earned $120,000 in rental income from a commercial property in the prior year. AAII = $120,000, which exceeds $50,000 by $70,000. SBD limit reduced by $70,000 x $5 = $350,000. Only $150,000 of active business income qualifies for the 11% combined BC SBD rate this year. The remaining $350,000 is taxed at 27% combined rate. Additional tax cost from the grind: $350,000 x 16% = $56,000.
Capital dividend extracted tax-free
A CCPC sold shares of a private company and realised a $200,000 capital gain. Taxable capital gain included in income: $100,000 (50% inclusion rate). The non-taxable $100,000 is credited to the Capital Dividend Account. The corporation files an election (Form T2054) and pays a $100,000 capital dividend to the shareholder. The shareholder receives $100,000 completely tax-free — a powerful extraction mechanism for business owners who realise capital gains inside their corporation.
Common Mistakes to Avoid
- Confusing RDTOH with a tax exemption — the high corporate rate on investment income is still real and is paid upfront. The RDTOH only provides a refund when dividends are actually distributed.
- Not tracking the two separate RDTOH accounts (eligible and non-eligible) and the ordering rules for which account generates the refund when dividends are paid.
- Ignoring the AAII grind-down when accumulating investment assets in the corporation — for a business earning near the $500k SBD limit, even $60,000 in passive income erodes $50,000 of SBD.
- Missing the Capital Dividend Account election deadline — the election to pay a capital dividend must be filed using Form T2054 before or at the time the dividend is paid. It cannot be elected retroactively.
Frequently Asked Questions
Is investment income inside a CCPC always a bad idea compared to personal investment?
Not always. While the corporate tax rate on investment income is high, if your personal marginal rate on investment income would be even higher (possible at top marginal rates in high-tax provinces), the combination of corporate tax plus eventual personal tax on dividends may result in less total tax than investing personally. Integration theory means the comparison is often close, and professional modelling for your province and income level is required.
What counts as adjusted aggregate investment income (AAII)?
AAII includes: interest income, rental income from passive properties, income from specified investment businesses, capital gains on passive investments (net of capital losses), and foreign passive income. It excludes: dividends from connected CCPCs, gains eligible for the lifetime capital gains exemption, and income from an active business. Capital gains on the sale of an active business do not count toward AAII and do not trigger the SBD grind-down.
What happens to the RDTOH balance if the corporation winds up?
If a corporation winds up while still holding an RDTOH balance, the balance is forfeited unless dividends are paid before the wind-up to trigger the refund. A common wind-up strategy involves paying dividends immediately before the wind-up to exhaust the RDTOH account, extracting the refundable portion of tax. Corporate tax planning before wind-up is essential to avoid losing accumulated RDTOH.
Does the passive income grind apply to corporations that inherited investments from an estate?
Yes. The AAII test applies to all adjusted aggregate investment income earned inside the CCPC, regardless of how the investments were acquired. A corporation that received a large investment portfolio through an estate transfer and earns significant passive income on it faces the same SBD grind-down as any other CCPC. There is no grandfathering for inherited investments.
Can I reset the AAII by transferring investments personally?
You can transfer investments out of the corporation to your personal name, but this is a disposition that triggers corporate capital gains tax at the time of the transfer (at fair market value). The decision to hold investments inside vs outside the corporation should be made upfront, as the exit route can be expensive. Once investments are transferred out, the AAII generated by those investments no longer applies to the CCPC.
Practical Tips
- If your CCPC is approaching $50,000 in annual passive investment income, model the combined cost of both the high passive tax rate AND the SBD grind-down — many business owners find it is more efficient to shift excess corporate cash into personally-held investments rather than accumulating beyond this threshold.
- Track the Capital Dividend Account balance meticulously on the T2 (Schedule 89) — a CDA balance represents tax-free extraction potential that is real money available to you, often overlooked in simpler T2 preparations.
- The RDTOH refund is only triggered when dividends are paid — if you are holding RDTOH and retiring or winding up the company, ensure you pay enough dividends before the wind-up date to fully exhaust the balance.
- If your corporation regularly earns above $50,000 in AAII, consider discussing with your accountant whether to hold passive investments inside a separate holding company versus the operating company, to protect the operating company's full SBD limit.
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