ELECTRICITY consumers in Tonga will pay significantly more for power after the Tonga Energy Commission approved a 35.8 per cent increase in the national electricity tariff, driven by a sharp rise in global diesel prices.
The new regulated tariff has increased from 89.58 seniti/kWh to 121.63 seniti/kWh, effective from 1 May 2026, with households and businesses expected to feel the impact in their upcoming electricity bills.
The Commission said the increase was a direct result of soaring global fuel costs, with Automotive Diesel Oil (ADO) prices used for power generation in Tonga rising by 59 per cent on 1 April, followed by a further 16 per cent increase on the 1 May.
It said diesel remains the main source of electricity generation in Tonga, meaning fluctuations in global fuel prices directly affect electricity costs.
According to the regulator, the spike in fuel prices has been driven by conflict in the Middle East and disruptions to shipping routes through the Strait of Hormuz, a key global oil transit corridor.
The Commission explained that while electricity tariffs are normally reviewed quarterly under Tonga’s regulatory framework, the recent fuel price surge was classified as an “extraordinary change,” allowing for an urgent adjustment outside the usual cycle.
It said the decision ensures the tariff reflects the actual cost of fuel used for power generation.
“The Commission recognises this is a significant increase and the financial pressure it places on households and businesses,” it said.
However, it stressed that the adjustment was outside its control and was necessary to maintain cost accuracy under the concession agreement with Tonga Power Limited.
The regulator has also urged consumers to reduce electricity use where possible, encouraging energy-saving practices such as switching off unused appliances, using energy-efficient lighting, and managing cooling and refrigeration systems.
The Tonga Energy Commission, the country’s independent energy regulator, is responsible for setting tariffs, monitoring Tonga Power Limited’s performance, and protecting consumer interests under the national electricity concession framework.
Source: Matangi Tonga Online
