Victorian electricity prices have risen by 10 to 12 per cent in the past year, a new study has found.

The study by the Essential Services Commission also found electricity prices increased by an average 33 per cent over the past five years; and gas by 22 per cent over the same period.

Electricity prices for consumers on standing offers increased by an average of 10 per cent, while prices for consumers on market offers increased by an average of 12 per cent.

Standing offer contracts are held by customers who have not taken up competitively priced market offers. Around one-third of Victorians remain on a standing offer for their retail electricity or gas.

However, the report also highlights the increasing competitiveness of the energy retail market as consumers shop around to save on their soaring energy bills and door-to-door sales activity increases.