Campaign contribution limits have increased in Ontario for 2025. In a calendar year, a person individually may contribute $3,400 to each party, to each constituency association and nominations contestants of a party, and to each leadership contestant of a party. Additionally, in a campaign period, a person may contribute $3,400 to each candidate of a party, and to each independent non-party candidate. The total contribution made with respect to a single fundraising event by a contributor may not exceed $3,400 multiplied by the indexation factor. The previous contribution limits from 2024 were $3,375.