Can I defer tax on a business sale by taking payments over several years instead of all at once?

To a limited extent, yes. Where a sale involves proceeds actually being received over time — commonly through a vendor take-back arrangement — Canadian tax rules allow a capital gains reserve, letting you defer recognizing part of the gain into future years rather than being taxed on the whole thing in the year of sale, even though you haven't yet received all the cash. This is a genuinely useful timing tool, matching your tax liability more closely to when you actually have the money in hand.

It isn't unlimited deferral, though. The reserve is subject to specific rules requiring a minimum portion of the gain to be brought into income each year, and there's a maximum number of years over which it can be spread before the remaining gain must be recognized regardless of whether every payment has actually come in. It also needs to be calculated and claimed correctly on your return each year it applies, not just assumed to happen automatically.

Because the reserve interacts with your specific payment schedule, any vendor take-back terms, and your overall tax picture, having an accountant confirm exactly how it applies to your deal, and build the claim into your filings each year, is essential rather than optional.