Before prices increase on Saturday, homeowners are urged to read and submit their energy metre readings.
This will prevent suppliers from overcharging for energy used before to 1 October by predicting usage.
The price cap for the typical annual household energy bill will climb by 27% starting next month, from £1,971 to £2,500.
The government-frozen cap dictates cost per unit, but bills are computed based on the amount of energy utilised.
In an effort to contain rising energy prices, the government declared that the energy price cap would be frozen until 2024.
It indicates that bills won't increase above £2,500 for a typical home using 12,000 kWh (kilowatt hours) of gas and 2,900 kWh (kilowatt hours) of electricity annually.
However, you will pay extra if you consume more gas or electricity than that.
Before October 1, customers should evaluate the best approach to report their metre readings, according to Energy UK, the industry organisation.
In view of the "unprecedented" scenario, the majority of providers will give customers a few extra days each side of that deadline to send their readings without penalising them.
It further stated that service providers have provided several ways for individuals to report their readings and anticipated substantial call volumes and website traffic.
According to Energy Action Scotland director Frazer Scott, "every family in the UK must make sure it submits a metre reading to their energy firm this week to prevent paying a cent more than they absolutely have to when rates go up on October 1."
"Fuel poverty is at historic levels, levels of energy efficiency improvements are simply insufficient to offer relief, and financial support is nothing more than a sticking plaster on the deepest of wounds," the report stated.
Starting the next month, every household in the UK will receive a one-time £400 fuel bill cut. Instalments of £66 and £67 will be made over the course of six months directly to clients' energy accounts.
Low-income households receiving specific benefits and tax credits have already received their first instalment of £326.
Energy watchdog Ofgem published an assessment on Tuesday that concluded that most energy providers need to improve how they assist consumers who are having trouble paying their bills.
Millions of people will still live in fuel poverty this winter, according to activists. Fuel poverty is defined as a household spending 10% or more of its income on energy.