Those who study building earn on average 52 per cent more.
Otago Polytechnic architecture, building and engineering head of school Richard Nyhof said it was not a surprise that engineers and builders were among the highest earners.
"Someone finishing a diploma of engineering in two years can turn that into quite strong earning power with a relatively small student loan."
The lowest earners were people who trained in performing arts. Those who took shorter courses earned 17 per cent less than the median wage after five years and those on longer courses 2 per cent more.
Other courses with poor earning potential included philosophy and religious studies, language and literature and communication and media studies.