The tariff adjustment is based on a rolling three-month average, which means recent fuel price surges take time to feed through to household bills. SINGAPORE: Electricity prices for households in Singapore have crept up since the conflict in the Middle East began – with no signs of slowing down yet. In April, the household electricity tariff rose 2.1 per cent or 0.56 cents per kWh compared with the previous quarter, before Goods and Services Tax (GST). But Singapore should expect a "much