Electricity tariffs will increase by an average of 0.5 per cent from Oct 1 for the next three months. This means that families living in four-room flats will have to fork out about 55 cents more per month.

This increase is due to rising fuel costs, which went up by 4.3 per cent compared to the previous quarter, said a statement by SP Services on Monday.

This means that the households will pay 26.08 cents per kWh from October to December, compared to 25.95 cents per kWh now.

The latest tariffs have been approved by electricity industry regulator the Energy Market Authority. SP Services, a subsidiary of Singapore Power, reviews the tariffs quarterly based on guidelines set by the authority.