Jolyon Palmer has reportedly been offered a large severance package to leave Renault before the next round of the 2017 season in Malaysia.
The Brit's contract with Renault will not be renewed at the end of the season and Toro Rosso's Carlos Sainz is waiting in the wings.
Sainz is due to join Renault on a year-long loan in 2018 to compensate for the Enstone-based team allowing Toro Rosso to give up their engine supply and join forces with Honda instead.
However, rather than wait until the end of the season, Renault are said to be eager to make the driver switch following the conclusion of the Singapore Grand Prix.
Fritz-Dieter Rencken of Racing Lines reported from the paddock in Singapore that Palmer has been offered a 'sizeable sum' to leave early and a decision is expected by Wednesday.
— Fritz-Dieter Rencken (@RacingLines) September 16, 2017
With Sainz joining Renault it would pave the way for Pierre Gasly to take his spot at Toro Rosso, someone who Red Bull boss Christian Horner describes as the "logical" choice.
"Carlos joining Renault creates a space and the purpose of Toro Rosso is to develop young talent," Horner said in Singapore.
"Like Carlos, like Max [Verstappen], like Daniel [Ricciardo] and like Sebastian Vettel before them.
"Pierre Gasly is the reigning GP2 champion, he's winning races in Japan at the moment and he would be logical, but nothing is confirmed."