Lewis Hamilton wants $50 million a year to renew his contract with Mercedes, according to Britain's Daily Mail newspaper.
The news, reportedly confirmed by a "source close" to the six-time world champion, comes after team boss Toto Wolff revealed that Hamilton was behind the decision to switch from a silver to black livery for 2020.
Both Hamilton and teammate Valtteri Bottas' contracts expire this year, and the Daily Mail said the 35-year-old Briton wants 40 million pounds sterling each season.
Told that Mercedes will be unwilling to shell out more for Hamilton amid the downturn, Marko said this week: "Then someone else will pay it.
"Petronas only has to transfer a little less to the team and send it to Hamilton instead."
The German news agency DPA is reporting ahead of the 2020 season re-start in Austria that Hamilton appears to want to stay at Mercedes for the foreseeable future.
"We want to build a legacy together that goes beyond sport," he is quoted as saying.