Inflation might reach 22% in January, and energy businesses could make £170 billion over two years.
Because of the more than doubling of the tariff, it will be much more difficult on the finances of families.
Goldman Sachs predicts that rising gas costs would result in an 80 percent rise in the energy cap by 2023.
They pressured Liz Truss and Rishi Sunak to pay an extra windfall tax to help the financially disadvantaged.
As of October, monthly energy expenditures averaged £3,549, and Goldman Sachs predicted a further 80% rise.
One in three homes can’t afford it. The US bank expects headline inflation might reach 22.4% next year, reducing GDP by 3.4%.
It also predicted that the UK’s GDP will fall by 0.6% in 2019, less than the Bank of England’s 0.5% prediction.