Can I use a rollover to move my shares into a holding company even after I've already started negotiating a sale?

Mechanically, a rollover can still be filed after negotiations have begun, but doing it once a sale is already underway raises real concerns that doing it years earlier wouldn't. Restructuring shareholdings specifically to change the tax outcome of a transaction that's already substantially agreed can attract scrutiny under the Income Tax Act's general anti-avoidance rules, particularly if the main purpose looks like reducing tax on a deal that was already going to happen anyway, rather than a genuine, independent business reorganization.

This doesn't mean every rollover done close to a sale is automatically challenged, but the timing, the surrounding facts, and how clearly there's a genuine non-tax purpose all matter a great deal to whether it holds up. A rollover done well before any buyer is identified, as part of ongoing succession or estate planning, sits on much firmer ground than one implemented after a purchase agreement, or even a firm letter of intent, is already in place.

Because the line between legitimate pre-sale planning and a challengeable last-minute restructuring is genuinely fact-specific, this is not something to attempt without a tax advisor's involvement and a clear-eyed assessment of how it will look if the CRA later reviews it.