Canada’s 2018-2020 National Action Plan on Open Government includes a milestone (milestone 5.5) that tasks Environment and Climate Change Canada (ECCC), with support from the Science-based Departments and Agencies (SBDAs), to develop and publish indicators for measuring the benefits of open science for Canadians by June 2019. Herein is a list of proposed benefit indicators currently under consideration by the SBDA Open Science Metrics Working Group. Section 1 presents proposed core benefit indicators for implementation by every SBDA. Section 2 includes proposed supplementary indicators for implementation by interested SBDAs. The indicators included in Sections 1 and 2 allow measuring benefits that open science can provide to academics and researchers, industry, governments, and the public in general. These and other proposed indicators will undergo further development as part of the process to implement the final set of indicators to be used to measure the benefits of open science for Canadians. Therefore, the inclusion of an indicator at this stage does not guarantee its selection in the final set of indicators to be reported on. Additionally, it is possible that elements identified as core indicators could be changed to supplementary indicators. By June 2020, an indicators report on the benefits of open science for Canadians will be published and will present the final set of indicators along with first year results.