POWER consumers will see higher transmission rates on their electricity bill in July, with the bulk of the increase driven by Ancillary Services (AS) rates, the National Grid Corp. of the Philippines (NGCP) announced.

For the June 2025 billing period, both AS and NGCP’s transmission wheeling rates increased, but the surge in AS costs accounts for most of the adjustment.

Overall equivalent average transmission rates for the June 2025 billing period increased by 5.49% to P1.2113 per kilowatt hour (kWh) from May’s P1.1482/kWh.

The increase was driven by a 9.32% increase in ancillary service rates in the June 2025 billing period. From PhP0.5655/kWh in May, AS rates increased to PhP0.6182/kWh.

AS rates pertain to the pass-through costs for power supplied by AS providers to stabilize the grid during power supply-demand imbalance. NGCP does not earn from AS and does not benefit from the movement in prices.

Meanwhile, NGCP’s transmission wheeling rates slightly increased by 0.39%, from P0.4593/kWh in the May 2025 billing period to P0.4611/kWh in the June 2025 billing period. (NGCP/PRD)

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