Formula One's governing body has suggested that a budget cap could be postponed to 2011 while teams called for next year's rules to be scrapped in return for a pledge to stay in the sport.
The governing FIA wants to introduce an optional $100 million cap for 2010 to help new teams enter and ensure the survival of existing competitors.
At the Monaco Grand Prix FIA president Max Mosley told reporters a higher figure could be agreed for next year before the full cap in 2011.
Ferrari team boss Stefano Domenicali says the teams association, FOTA, had written to the FIA seeking guarantees and putting forward their own proposals.
Mosley says one or two manufacturers might leave at the end of the season, with or without a cap, but he was confident that champions Ferrari will remain despite a threat to quit.
Former champions Renault, who are facing a gaping hole in their team budget after main sponsor ING announced their departure at the end of the year, and Toyota are seen as the most uncertain.
Japan's Honda have already walked away, their place taken by championship leaders Brawn GP.