International automobile federation (FIA) chief Jean Todt warned that the coronavirus could threaten the future of motorsport teams and manufacturers.
Nine races in the Formula One world championship have already either been cancelled or suspended.
"There has been this cascade of cancellations and postponements. We must reconsider the calendars and ask ourselves when everything will be able to resume," Todt told AFP.
"Motor racing, starting with F1, is too expensive.
"We have already taken steps in this direction, but the pandemic makes it more difficult to bear these costs.
"There is the risk of losing teams, constructors. You have to be responsible and implement more acceptable and accepted solutions."
However, Todt cautioned: "Everything is not included in this ceiling. We are working on it."
"We can take stock at the end of the year but it's too early today."