Scots face energy costs soaring by nearly 10 per cent in the run-up to winter with the average annual bill set to rise to £1714.
Respected consultants Cornwall Insight expect the average household to be paying £146 more per year for gas and electricity from October.
Regulator Ofgem will set out the latest changes to the energy price cap on Friday.
Fuel poverty groups hit out at the rise warning as they urged the Labour government to take urgent action to slash bills for Scots.
The End Fuel Poverty Coalition is calling on UK ministers and regulators to review nine “nightmare” energy rules it claims are worsening the crisis.
Among them are recommendations to slash standing charges, cap exit fees and bring in a “social tariff” to protect vulnerable households.
It follows Chancellor Rachel Reeves’ move to scrap the universal Winter Fuel Payment, changing the benefit so it is means-tested – with the Holyrood administration doing the same with its Scottish equivalent.
A Department for Energy Security and Net Zero spokesman said: “We will also support households to cut their bills and reduce fuel poverty through the £150 Warm Home Discount this winter, and the Warm Homes Plan – upgrading millions of homes this Parliament.
“Too much of the burden of energy bills is on standing charges and we will work with Ofgem to reduce them.”
