No, the Smart Readiness Indicator (SRI) remains voluntary across the European Union. However, this status is set to change in the near future for specific building categories.
Under the revised Energy Performance of Buildings Directive (EPBD) adopted in April 2024, the European Commission is mandated to:
By June 2026: Deliver a report on the testing and implementation of the SRI based on national test phases and other relevant projects
By June 2027: Adopt a delegated act requiring the application of the SRI to non-residential buildings with an effective rated output for heating, ventilation, and air-conditioning (HVAC) systems over 290 kW
This means that, starting from mid-2027, the SRI will become mandatory for large non-residential buildings exceeding the specified HVAC capacity.