Electricity tariffs may fluctuate from quarter to quarter, in light of “volatile global fuel prices driven by geopolitical factors”, said SP Group in a statement on Tuesday (Sep 30). The increase, rooted in higher energy costs, will push household electricity tariffs to 27.55 cents per kWh in Q4, from 27.47 cents in the quarter prior. The average monthly electricity bill for families living in HDB four-room flats will rise by 31 cents before GST. In a statement on Tuesday (Sep 30), SP Group said electricity tariffs may fluctuate from quarter to quarter, in light of “volatile global fuel prices driven by geopolitical factors”. SP Group reviews the electricity tariffs every quarter, based on guidelines set by the electricity industry regulator, the Energy Market Authority.