Can a dependant support order be varied later if the recipient's circumstances change?

Generally, yes. Ontario courts can revisit and vary an existing dependant support order where there's been a material change in circumstances since it was made — for example, a real shift in the dependant's income, health, or needs, or in the estate's own ability to pay. This works much like variation does for support orders more broadly: making the order once doesn't necessarily lock it in forever.

That said, variation isn't automatic. The change has to be genuine and significant, not just a shift in preference, and the original order's own terms — whether it contemplated future review, or was framed as final — matter a great deal. Because a Part V order draws on an estate that may already be substantially administered or distributed, revisiting one later can be more complicated than varying an ordinary support order between two living people; there may simply be less left in the estate to draw from. Anyone considering an application to vary, whether they're the recipient, the estate trustee, or another beneficiary, should get legal advice about whether the change genuinely qualifies and what's practically still available from the estate.