This document discusses Portugal's progress towards open access and the potential impact on b-on, Portugal's open access repository. It notes that around 70% of Portuguese publications have a corresponding author from Portugal. If these publications moved to open access, it could save Portugal 12-18 million euros per year in subscription costs. This transition may impact b-on in several ways, including monitoring open access metrics, workflows for handling article processing charges, negotiation strategy, and alternative access plans. Partnerships with other organizations will also be important for supporting open access in Portugal.