The States will help those on low incomes to pay their power bills by providing a 12.5% discount, as gas prices have increased.
It was announced in September that gas rates for Guernsey would increase by 16.9% in mid-October.
The Employment and Social Security Committee has introduced the discount scheme alongside Guernsey Gas and Islands Energy Group to help cover the rise in costs.
Officials will consider the level of household income and savings, as well as whether income support is being received. They say that some households that are not eligible for income support may also be able to get a discount.
Vice president of the committee Deputy Lindsay de Sausmarez says she does not want people to struggle with payments.
"We are pleased to be able to provide additional support for those who rely on gas heating. If you know you will struggle to meet the additional cost of your gas heating this winter, we strongly encourage you to consider claiming this discount.
We do not want anyone to struggle over the colder months due to these extra heating costs.”
Applications for support opened on 1 November. It is expected to be available for the next six months.
The scheme is being paid for by the Policy and Resources Committee.