The Energy Regulatory Commission has decided to raise the fuel tariff (FT) included in electricity charges for three months, from May to August.
ERC spokesman Khomkrit Tantrawanich said on Thursday the increase was mainly due to the impact of the Russian war on Ukraine.
The conflict had led to a steep rise in global gas and oil prices. Accordingly, the FT would rise by 0.2338 baht to 1.2991 baht per unit, effective May to August, he said.
This would raise the cost of electricity to four baht per kilowatt hour, he said.
An additional factor behind the increase was the declining supply of natural gas from the Gulf of Thailand, Mr Khomkrit said.