If you make a donation of a good or service that is considered to be a contribution under the Act, the value of that donation must be determined.

The good or service will be valued as the lowest amount charged for such goods and services in that market area at that time. For example, if you make a donation of letterhead and envelopes that would normally cost $220, it must be recorded as a contribution in that amount. If the letterhead and envelopes were provided for a reduced price of $100, the contribution would be the difference between the price paid ($100) and the normal selling price of the goods ($220). In that case, a donation of $120 must be recorded.

Download Ontario Provincial Election Contributions 2018: What you need to know (PDF)