In New Zealand, normal Bachelor degrees are of three years while all professional degrees and degrees with Honors take 4 years. Master's Degrees duration would depend on the basis of your bachelor’s degree. Normally the duration of the master degree is two years. However, if you are changing the stream i.e. If you coming from engineering background to business or vice versa then the entry would be through a Graduate Diploma which means that you will be required to do a one year additional study to make up for your bachelors degree.
In this case your master’s degree would take three years. However, you can leave after the Graduate Diploma or Postgraduate Diploma, which offer good employment opportunities.