THE National Grid Corporation of the Philippines (NGCP) reported mixed changes in transmission and ancillary service rates, as reflected in the June 2025 electric bills of consumers.
According to NGCP, the average transmission wheeling rates, which represent the fees collected for delivering electricity across the grid, decreased marginally by 0.27% in the May 2025 billing period.
The rate dropped from P0.4605 per kilowatt-hour (kWh) in April to P0.4593/kWh in May — a reduction of P0.0012/kWh.
Conversely, the rates for Ancillary Services (AS), which are support services used to maintain grid stability and balance during supply-demand fluctuations, increased by 9.29%.
The rate rose from P0.5175/kWh in April to P0.5655/kWh in May, or an increase of P0.0480/kWh.
NGCP clarified that Ancillary Service rates are pass-through costs, meaning they are collected directly from end consumers and remitted immediately to generation companies.
These services are sourced either from the AS reserve market or through bilateral contracts with AS providers, ensuring grid stability and reliable power supply.
The combined effect of these rate changes resulted in an overall increase in the average transmission-related charges on consumer bills.
The total average transmission rate for the May 2025 billing period, when translated into household electricity bills for June, is P1.1482 per kWh — reflecting a 4.60% rise from April’s P1.0978/kWh.
Consumers are advised to stay informed about these rate adjustments, which are part of the regular pass-through costs associated with maintaining a stable and reliable power grid in the Philippines.
