Sky News understands the chancellor will cancel a reduction in support that would have seen typical annual bills rise from £2,500 to £3,000.
In recent days, the government has asked energy suppliers to prepare for both scenarios, fuelling a widespread expectation in the industry that existing support will be maintained when chancellor Jeremy Hunt delivers his budget on 15 March.
Energy companies have been asking for guidance ahead of a regulatory deadline to inform customers of impending price changes, which falls this weekend.