Australians are sacrificing the equivalent of up to 6 per cent of their salaries sitting in morning traffic, a new analysis suggests.

The study compared how many hours people spent driving to work every year in 108 cities around the world.

Sydney's hot property is forcing people to move further away from the city, extending commute times. Credit:Kate Geraghty

By coupling that with average salaries in each city, Global Positioning Specialists, a fleet management firm, calculated how much workers lost in equivalent wages during their morning commute.

The comparison assumes workers earn an hourly wage and would choose to extend their workday with the hours they otherwise spend commuting.