Next year, a new era dawns in formula one, but teams are already hard at work designing and developing all-new cars for the radically different V6 turbo regulations.
"We are already thinking about next season," Massa is quoted by Brazil's Totalrace.
After a solid start to the season, Ferrari's development progress has faltered more recently, with Fernando Alonso's challenge now almost 40 points behind Red Bull driver Sebastian Vettel's title lead.
It means Ferrari, like most teams, is now counting down the races until preparing for the 2014 challenge becomes the absolute priority.
"It is very important," said Massa, "because so much is changing that we have had a whole group that only works on the next car for a long time.
"But we need to look at the performance in the next races to determine if we should continue to develop this (2013) car, or focus completely on 2014," he added.