The US Senate has passed legislation to block the impact of across-the-board tax increases and spending cuts that make up the fiscal cliff.
The vote in the Democrat-dominated chamber was an overwhelming 89-8 and came well after midnight local time on New Year's Day.
A vote in the Republican-led House of Representatives is expected before Wednesday.
The White House-backed legislation would prevent middle-class taxes from rising, and raise rates on incomes over 400,000 US dollars (£245,800) for individuals and 450,000 US dollars (£276,000) for couples.
It also blocks spending cuts for two months, extends unemployment benefits for the long-term jobless, prevents a 27% cut in fees for doctors who treat Medicare patients and prevents a spike in milk prices.