Butterflies Denied Under 55(3.1)
Understanding when butterfly reorganizations fail (Subsection 55(3.1))
If the first article answered the how of a butterfly, this one answers the when not. That is usually where the real risk sits. Most butterfly files do not fail because someone forgot the basic mechanics. They fail because of the steps around the butterfly. A property transfer before the split. A share purchase before the documents are signed. A sale or freeze after the dust settles. Subsection 55(3.1) is built to catch exactly that.
It asks three practical questions. Was property loaded into the structure because the butterfly was coming? Did the shareholder group change in a way that makes the deal look like a purchase butterfly? Did the assets move outside the group too soon after the split? Read that way, the provision becomes much easier to use.
Planning Tip: On a butterfly file, I stop looking at steps one by one and start looking at the whole series. That is how subsection 55(3.1) reads, and that is how the CRA reads it too.
The anti-stuffing rule (Paragraph 55(3.1)(a))
Paragraph 55(3.1)(a) is the anti-stuffing rule. In plain English, it says this: before the butterfly distribution, property cannot become property of the distributing corporation, a corporation it controls, or a predecessor corporation because the butterfly is coming. The target is easy to see. Parliament did not want shareholders loading attractive property into the structure, or reshuffling the asset mix, so that one shareholder can walk away with better assets on a tax-deferred basis.
The carve-outs matter. Paragraph 55(3.1)(a) does not attack every pre-butterfly property move. It leaves room for transfers up and down the related corporate chain, certain related-company amalgamations, prior butterfly reorganizations, and taxable sales for money or plain debt. So internal clean-up is still possible. What is not possible is a property movement that exists only to make the butterfly work better.
Worked example: In 2008-0284591R3, the distributing corporation sold its interest in a real-estate joint venture and related bare-trust shares to the other joint-venture participants for cash and an assumption of liabilities. It then deposited the cash into its brokerage account and bought additional marketable securities. The ruling record is useful because it stresses the commercial reason for the sale: the sale would have happened whether or not the butterfly went ahead, and the butterfly would have gone ahead whether or not the sale happened. That is the practical question under paragraph 55(3.1)(a).
Planning Tip: When I see a pre-butterfly property move, I ask one blunt question first: would this step still happen if the butterfly disappeared? If the answer is no, paragraph 55(3.1)(a) is usually where the trouble starts.
Most common pitfall: calling a pre-butterfly transfer “cleanup” and stopping the analysis there. If the step changes the asset mix in a way that makes the split easier, the CRA is likely to see the same step as stuffing.
Continuity of share ownership (Paragraph 55(3.1)(b))
Paragraph 55(3.1)(b) is the continuity rule for owners. It asks whether the same shareholder group still owns the same economic slices throughout the series. If the answer is no, the butterfly starts to look less like a division among continuing shareholders and more like a disguised sale. That is why paragraph 55(3.1)(b) is the main rule behind the ban on the classic purchase butterfly.
The defined terms are just the list of share moves the Act is willing to tolerate. A permitted acquisition is the actual property transfer on the distribution, plus certain follow-on acquisitions in another butterfly. A permitted exchange is a pre-butterfly share exchange that is needed to set up the split, such as a section 51 or 86 recapitalization that does not shift control, or the transfer of distributing-corporation shares to an acquiror corporation that will participate in the butterfly. A permitted redemption is the redemption sequence that unwinds the cross-holdings, plus certain pre-butterfly redemptions of specified-class preferred shares.
Once those safe steps are carved out, the three subparagraphs do the real work. Subparagraph 55(3.1)(b)(i) stops a meaningful owner from selling shares as part of the series to an unrelated person. In practice, that is aimed at a specified shareholder — broadly, a 10 percent owner. Subparagraph 55(3.1)(b)(ii) stops an acquisition of control of the distributing corporation or a transferee corporation, unless the control change happens through a permitted step. Subparagraph 55(3.1)(b)(iii) closes the smallest gap. Even without a specified shareholder and even without a control acquisition, it can still deny the butterfly where shares of the distributing corporation were acquired in contemplation of the distribution. That is the rule that catches the “small slice first, assets later” version of a purchase butterfly.
Worked example: In 2008-0268321R3, Bco and Cco moved from acquisition talks to a structure under which Cco would become a 50 percent owner of Aco. The ruling request then had to confront the butterfly rules head-on: was there an acquisition of control as part of the same series, and had Cco acquired shares in contemplation of the later distribution? That is paragraph 55(3.1)(b) in practice. The hard issue was not the butterfly mechanics. The hard issue was whether the earlier share deal and the later butterfly were really one series.
Planning Tip: I map every share issuance, subscription, exchange, redemption, and voting shift on one page. Paragraph 55(3.1)(b) is much easier to read as a timeline than as a closing binder.
Planning Tip: If a recapitalization is supposed to be a permitted exchange, I check control first and wording second. A neat reorganization of capital that shifts control is still not a permitted exchange.
Most common pitfall: assuming a butterfly is safe because the share acquisition happened months earlier. The series concept is much wider than the closing date.
Continuity of interest in property (Paragraphs 55(3.1)(c) and (d))
Paragraphs 55(3.1)(c) and (d) do for property what paragraph 55(3.1)(b) does for shares. They ask whether the same economic interest remained in the assets after the split. Paragraph 55(3.1)(c) looks at what the transferee corporation received. Paragraph 55(3.1)(d) looks at what the distributing corporation kept. In both cases, the policy is the same: a butterfly is for dividing assets among continuing shareholders, not for passing those assets to outsiders on the way out.
The basic test is blunt. If, as part of the same series, more than 10 percent of the fair market value of the butterflied property or retained property ends up with an unrelated person or partnership, the exemption can fail. The Act does leave room for ordinary-course dispositions, related-party continuity, later butterflies, and small movements below the 10 percent threshold. But once the post-butterfly sale is material, paragraph 55(3.1)(c) or paragraph 55(3.1)(d) becomes very hard to manage.
Paragraph 55(3.1)(d) matters more than it first appears. It is not just about a direct sale of retained assets. It also catches the sale of the distributing corporation’s shares, or property deriving enough of its value from those shares, where that sale is really part of the same series. That is why practitioners often describe paragraph 55(3.1)(d) as the dividend-recipient-share rule. It stops the retained side of the butterfly from becoming a delayed share sale to an outsider.
Worked example: In 2015-0598641R3, the transferee corporation sold certain farming equipment after the butterfly and used the proceeds to buy replacement equipment so it could keep farming and adopt a better operating method. The CRA confirmed that the earlier butterfly rulings remained valid. That is a helpful example because it shows what paragraph 55(3.1)(c) does not prohibit. It does not ban normal business operations. It bans the post-butterfly cash-out.
The harder question is the post-butterfly freeze. The April 2025 TFOM piece notes that a subscription-style freeze can look easier under the text, but it also stresses that the CRA has not given direct guidance. So a freeze is not automatically offside, but it is not automatically blessed either.
Planning Tip: I split post-butterfly steps into two buckets: ongoing business operations and exit steps. The first bucket is easier to defend. The second is where paragraph 55(3.1)(c) or (d) usually shows up.
Most common pitfall: treating “after the butterfly” as the same thing as “outside the series.” It is not.
Takeaways
Start with the series, not the individual steps. That is how subsection 55(3.1) works.
Paragraph 55(3.1)(a) is about anti-stuffing before the butterfly. Ask whether the property move would still happen without the butterfly.
Paragraph 55(3.1)(b) is about continuity of ownership. The permitted steps are narrow safe lanes, not a general comfort blanket.
Paragraphs 55(3.1)(c) and (d) police what happens to the assets after the split, with a hard 10 percent threshold doing most of the work.
Post-butterfly sales and freezes need the same care as pre-butterfly planning, because “later” does not mean “outside the series.”
THIS ARTICLE PROVIDES GENERAL INFORMATION ONLY AND DOES NOT CONSTITUTE LEGAL, TAX, OR OTHER PROFESSIONAL ADVICE. READERS SHOULD CONSULT QUALIFIED PROFESSIONALS REGARDING THEIR SPECIFIC CIRCUMSTANCES. TAX LAWS AND INTERPRETATIONS CHANGE FREQUENTLY, AND THE APPLICATION OF LAWS DEPENDS ON INDIVIDUAL FACTS.
