From an OpenAire Blog Post:
“Research findings funded by public money are a public good,” says Matthias Egger, the President of the National Research Council. Open Access is quickly becoming the accepted standard in science. Until now, less than 50% of the publications produced in SNSF-funded research have met this requirement. But as of 2020, the SNSF will expect all publications (100%) to be available free of charge in digital format.
Until now, the SNSF has covered the costs of publishing in OA journals. As of April 2018, it will also pay for OA books and as of October 2018 for OA book chapters. In addition, it will simplify the application process for publication grants, making it easier for researchers to meet the Open Access requirements.