Advanced metering infrastructure (AMI) meters (also referred to as "smart meters") provide up-to-date and accurate electricity usage data. This can help consumers better manage their energy usage and can even assist them in cutting their utility costs. Some electricity plans require AMI meters, though many will provide full subsidies for the installation cost (S$40 excluding GST). Eventually, all existing meters will be replaced by smart meters; although this process will occur gradually. At this time, the Energy Market Authority of Singapore (EMA) does not require households to switch their meter. For more information about the cost of AMI meters, contact your preferred retailer.