What officer positions does an Ontario not-for-profit corporation need to fill?

ONCA does not itself mandate specific officer titles the way some people assume — it leaves the choice of officer positions, and what each one does, largely to the corporation's own by-laws. Many organizations still adopt a familiar slate — chair or president, vice-chair, secretary, and treasurer — because it maps naturally onto how a volunteer board actually divides responsibility, but that pattern is convention rather than a strict statutory requirement.

What the Act does require is that certain governance functions actually happen — someone needs to be responsible for calling and running meetings, someone for keeping minutes and records, and someone for financial oversight — and the by-laws should assign those responsibilities clearly to specific officer roles, even if the corporation is free to choose its own titles for them. A director can generally also serve as an officer, which is standard practice on small boards.

Organizations that have never reviewed their officer provisions since incorporating should check that the by-laws actually describe what each officer does, rather than just listing titles, since a dispute about who had authority to sign a document or approve a payment often comes down to what the by-laws say an officer's role actually includes.