What is the dividend refund formula for Canadian corporations?

The dividend refund is equal to the lesser of 38.33% of taxable dividends paid during the taxation year or the ending balance in the relevant RDTOH pool.

What is the difference between eRDTOH and nRDTOH?

eRDTOH is funded by Part IV tax on eligible dividends and can be recovered by paying either eligible or non-eligible dividends. nRDTOH is funded by refundable Part I tax on interest and capital gains and can only be recovered by paying non-eligible dividends.

Refundable Dividend Tax on Hand: eRDTOH vs nRDTOH Math

Q: Can an eligible dividend recover Non-Eligible RDTOH (nRDTOH)?

No. Under Section 129(1) of the Income Tax Act, eligible dividends can strictly only recover Eligible RDTOH (eRDTOH). To recover nRDTOH, the corporation must declare and pay non-eligible dividends.

In Canadian corporate tax law, passive investment income earned inside a private corporation is intentionally subjected to punitive initial tax rates. Under the integration principle that underpins the Income Tax Act (ITA), the federal government aims to ensure that an individual earning investment income through a Canadian-Controlled Private Corporation (CCPC) pays approximately the same total combined tax as an individual earning that same income directly in their personal name. To achieve this neutrality while preventing wealthy business owners from using corporations as indefinite tax-deferral shelters, the tax code employs a complex mechanism: Refundable Dividend Tax on Hand (RDTOH).

When a corporation earns passive interest, foreign dividends, net taxable capital gains, or portfolio Canadian dividends, it is hit with refundable taxes exceeding 30% to 38.33%. These taxes are not permanently lost; instead, they are tracked inside notional corporate ledger accounts and returned to the corporation as a Dividend Refund when the company pays taxable dividends out to its human shareholders. However, legislative overhauls bifurcated this system into two distinct pools: Eligible RDTOH (eRDTOH) and Non-Eligible RDTOH (nRDTOH). Understanding how these accounts accumulate, interact with General Rate Income Pools (GRIP), and dictate dividend distribution sequences is essential for incorporated professionals, physicians, and HoldCo executives.

What Is Refundable Dividend Tax on Hand (RDTOH)?

Direct Answer: RDTOH is a notional tax account tracking refundable corporate taxes paid on passive investment income under Part I and Part IV of the Income Tax Act. For every $2.61 of taxable dividends a corporation pays out to its shareholders, the CRA refunds $1.00 of RDTOH back to the corporation (a 38.33% refund rate), preventing double taxation upon extraction.

Prior to tax reform, private corporations maintained a single RDTOH pool. This allowed companies to pay out lower-taxed eligible dividends (which receive an enhanced dividend tax credit personal rate) while recovering refundable taxes generated from higher-taxed non-eligible passive income—a phenomenon known as ‘RDTOH streaming’. To eliminate this planning opportunity, the federal government enacted Section 129 rules splitting RDTOH into two segregated accounts with strict ordering rules.

The Bifurcation Architecture: Eligible RDTOH vs. Non-Eligible RDTOH

To audit an incorporated portfolio accurately, one must trace how different asset classes generate refundable taxes and which specific pool receives the credit:

Component / Mechanism	Eligible RDTOH (eRDTOH)	Non-Eligible RDTOH (nRDTOH)
Income Sources That Fund the Account	• Part IV tax on eligible dividends received from non-connected public corporations (e.g., Canadian blue-chip stocks) • Eligible dividends received from connected corporations with an eRDTOH refund	• Part I refundable tax (30.67%) on aggregate investment income (AII): interest, foreign income, net capital gains • Part IV tax on non-eligible dividends received from connected corporations
Initial Corporate Tax Incurred	38.33% Part IV Tax	50.17% combined rate (30.67% refundable) on AII; 38.33% Part IV on dividends
Dividend Type Required to Trigger Refund	Either Eligible OR Non-Eligible Dividends	Non-Eligible Dividends ONLY
Dividend Refund Calculation Rate	Lesser of 38.33% of taxable dividend paid or balance in eRDTOH	Lesser of 38.33% of non-eligible dividend paid or balance in nRDTOH
Ordering Rule on Dividend Payments	Second in line (when non-eligible dividends paid)	First in line: nRDTOH must be fully recovered before eRDTOH can be claimed on non-eligible dividends

The Part IV Tax Mechanism: Portfolio Dividends in a HoldCo

When an individual owns dividend-paying Canadian equities (such as Royal Bank, Enbridge, or Telus) directly in a taxable account, they report the actual dividend, gross it up by 38%, and apply the federal and provincial dividend tax credit. But what happens when an incorporated physician or holding company buys those same shares inside a corporate investment account?

Under Section 112(1) of the ITA, dividends received by a Canadian corporation from another taxable Canadian corporation are initially deductible from taxable income, preventing cascading corporate tax layers. However, to prevent CCPCs from becoming untaxed corporate holding vaults, Part IV Tax (Section 186) immediately steps in:

The Part IV Tax Rate: A flat 38.33% (38 1/3%) tax is levied on the full cash dividend received.
100% Refundable Addition: Because these are eligible dividends received from a public corporation, 100% of the Part IV tax paid flows directly into the corporation’s eRDTOH balance.
Cash Flow Impact: If your HoldCo receives $30,000 in dividends from Canadian public equities during the fiscal year, the corporation must remit $11,500 in Part IV tax to the CRA when filing its T2 Corporate Income Tax return. That $11,500 sits in the eRDTOH ledger until a dividend is declared out to the individual shareholder.

Aggregate Investment Income (AII) and nRDTOH

When a corporation earns interest on GICs, bond coupon payments, rental income, foreign dividends (e.g., US stocks), or realized taxable capital gains, the income is classified as Aggregate Investment Income (AII) under subsection 129(4). The taxation of AII represents the highest headline corporate tax rate in Canada:

Breakdown of the 50.17% Corporate Tax on Passive Interest (Ontario Example):

Basic Federal Corporate Tax: 38.00%
Federal Tax Abatement: -10.00%
Additional Refundable Part I Tax (ART): +10.67%
Ontario Provincial Corporate Tax: +11.50%
Total Combined Headline Tax: 50.17%
Refundable Portion Allocated to nRDTOH: 30.67%
Permanent (Non-Refundable) Tax Retained by Government: 19.50%

Notice the mathematical split: while the corporation pays over 50% in cash upfront, 30.67% of the taxable amount is credited to the company’s nRDTOH pool. The remaining 19.50% is permanent tax revenue collected by the federal and provincial treasuries. When you eventually extract the after-tax funds as a non-eligible dividend, the CRA returns that 30.67% via the dividend refund, bringing total integration into alignment with personal rates.

The 38.33% Dividend Refund Math: Step-by-Step Numerical Case Study

To demonstrate the exact mechanics of dividend refunds, consider Dr. Marcus Vance, who operates Vance Holdings Inc. On December 31, the company’s tax ledger reflects:

$25,000 in the nRDTOH balance (from corporate bond interest).
$15,000 in the eRDTOH balance (from Canadian blue-chip dividends).
$40,000 in the GRIP pool (General Rate Income Pool).

Scenario A: Declaring a $30,000 Eligible Dividend

Dr. Vance decides to pay himself a $30,000 eligible dividend. Because he has $40,000 of GRIP, the company can legally designate the entire $30,000 as an eligible dividend:

Dividend Refund Calculation: The dividend refund is calculated as the lesser of:
- 38.33% of the eligible dividend paid: $30,000 × 38.333% = $11,500.
- The balance available in the eRDTOH pool: $15,000.
Crucial Rule Check: An eligible dividend cannot recover nRDTOH under subsection 129(1). It can only draw from eRDTOH.
Result: Vance Holdings receives an $11,500 dividend refund from the CRA, reducing corporate tax payable. The eRDTOH balance drops to $3,500 ($15,000 – $11,500). The nRDTOH balance remains completely untouched at $25,000.

Scenario B: Declaring a Non-Eligible Dividend and the Strict Ordering Rule

Now assume Dr. Vance pays himself a $40,000 non-eligible dividend. Non-eligible dividends have the unique statutory power to recover both nRDTOH and eRDTOH, but the ITA enforces a mandatory priority sequence:

Priority 1: Exhaust nRDTOH First. The non-eligible dividend must first recover all available nRDTOH before touching eRDTOH.
- Total refund generated: $40,000 × 38.333% = $15,333.
- Since the nRDTOH balance is $25,000, the entire $15,333 is drawn from the nRDTOH pool.
Result: Vance Holdings receives a $15,333 dividend refund. The nRDTOH balance drops to $9,667 ($25,000 – $15,333). The eRDTOH balance remains at $15,000.
If the Non-Eligible Dividend Was $80,000: The total refund generated would be $30,667 ($80,000 × 38.333%). The company would first exhaust the entire $25,000 of nRDTOH, and the remaining $5,667 of refund would spill over and be extracted from the eRDTOH balance.

Alistair Vance’s Forensic Analysis:

The split RDTOH rules punish passive corporate investing if the business owner does not actively clear their refund pools. Millions of dollars in Canadian private holding companies are sitting trapped in zero-interest CRA refundable tax accounts simply because accountants fail to run dividend optimization modeling. If you have non-eligible RDTOH sitting on your balance sheet, you are extending an interest-free loan to the federal government. Every dollar of taxable dividend paid out recovers 38.33 cents of hard cash back into your operating treasury.

Intercompany Dividends Between Connected Corporations

One of the most powerful structures in Canadian wealth architecture is the OpCo-HoldCo relationship. Operating companies generate active business earnings taxed at the 12.2% small business deduction rate (or 26.5% general rate) and pay dividends upstairs to a holding company for asset protection against operational litigation.

Under Section 186(4), two corporations are connected if the recipient corporation owns more than 10% of the voting shares and fair market value of the payer corporation, or controls the payer corporation. When OpCo pays a dividend to HoldCo:

No RDTOH in OpCo: If OpCo does not receive a dividend refund on the payment, HoldCo pays $0 in Part IV tax under Section 112(1). Retained earnings move upstream completely tax-free.
OpCo Receives a Dividend Refund: If OpCo has an existing RDTOH pool and receives a dividend refund by paying the dividend to HoldCo, Section 186(1)(b) mandates that HoldCo must pay Part IV tax equal to the dividend refund received by OpCo. HoldCo then receives an identical credit in its own RDTOH ledger. This prevents corporations from erasing RDTOH by endlessly shuffling cash between related entities.

The Passive Income Grind and SBD Clawback Interaction

RDTOH mechanics cannot be analyzed in isolation from the $50,000 AAII (Adjusted Aggregate Investment Income) threshold. When a corporate group’s passive investment income exceeds $50,000 in a taxation year, the Small Business Deduction (SBD) is ground down by $5 for every $1 of passive income over the threshold, completely eliminating access to the 9.0% federal small business rate at $150,000 of passive income.

Because interest, foreign income, and net capital gains generate both nRDTOH and AAII grind, incorporated professionals must balance holding high-yield fixed income against tax-efficient corporate class structures or dividend-paying equities. Compare corporate holding strategies in our forensic breakdown of Corporate Class ETFs in Canada and evaluate incorporation viability in Incorporating in Canada.

Alistair Vance’s Verdict:

Audit your T2 Schedule 3 and corporate notices of assessment every spring. If your HoldCo has accumulated nRDTOH, model an annual non-eligible dividend extraction sequence up to the point where all refundable taxes are fully recovered. Pair this dividend declaration with a corporate Capital Dividend Account (CDA) payout or a TFSA/RRSP personal contribution to maximize inter-generational wealth retention and prevent government dead-capital lockup.